Canon Color imageCLASS 8180c Service manual

Service Manual
MF8100 Series
LaserBase MF8180C
Jan 20 2006
Application
This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair
of products. This manual covers all localities where the products are sold. For this reason, there may be information in this
manual that does not apply to your locality.
Corrections
This manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When
changes occur in applicable products or in the contents of this manual, Canon will release technical information as the need
arises. In the event of major changes in the contents of this manual over a long or short period, Canon will issue a new edition
of this manual.
The following paragraph does not apply to any countries where such provisions are inconsistent with local law.
Trademarks
The product names and company names used in this manual are the registered trademarks of the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or
translated into another language, in whole or in part, without the written consent of Canon Inc.
COPYRIGHT © 2001 CANON INC.
Printed in Japan
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.
Introduction
Symbols Used
This documentation uses the following symbols to indicate special information:
Symbol
Description
Indicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.
Memo
Indicates an item of reference assisting the understanding of the topic in question.
REF.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Introduction
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of operation.
In the diagrams,
represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow
indicates the
direction of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in
supplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, however, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors
used in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the
DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be communicated in the form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be
able to identify and isolate faults in the machine."
Contents
Contents
Chapter 1 PRODUCT DESCRIPTION
1.1 Product Specifications ................................................................................................................................1- 1
1.1.1 Product Specifications ............................................................................................................................................. 1- 1
1.2 Names of Parts ...........................................................................................................................................1- 3
1.2.1 External View........................................................................................................................................................... 1- 3
1.2.2 Cross Sectional View............................................................................................................................................... 1- 4
1.2.3 Major Unit ................................................................................................................................................................ 1- 4
1.2.4 Major Component .................................................................................................................................................... 1- 5
1.3 Safety .........................................................................................................................................................1- 5
1.3.1 Safety of the Laser Light.......................................................................................................................................... 1- 5
1.3.2 Safety of Toner ........................................................................................................................................................ 1- 5
1.3.3 Safety and Ozone.................................................................................................................................................... 1- 5
1.3.4 Points to Note When Replacing/Disposing of the Lithium Battery........................................................................... 1- 5
1.3.5 CDRH Ordinances................................................................................................................................................... 1- 6
1.4 Functional Configuration.............................................................................................................................1- 6
1.4.1 Functional Construction........................................................................................................................................... 1- 6
1.5 Basic Sequense..........................................................................................................................................1- 6
1.5.1 Basic Operation Sequence...................................................................................................................................... 1- 6
1.5.2 Power-on Sequence ................................................................................................................................................ 1- 7
Chapter 2 TECHNICAL REFERENCE
2.1 Document Feed and Exposure System ......................................................................................................2- 1
2.1.1 Overview/Configuration ........................................................................................................................................... 2- 1
2.1.1.1 Overview .................................................................................................................................................................................. 2- 1
2.1.1.2 Major Components................................................................................................................................................................... 2- 1
2.1.2 Basic Sequence....................................................................................................................................................... 2- 2
2.1.2.1 Basic Sequence of Operation at Power-on.............................................................................................................................. 2- 2
2.1.2.2 Basic Sequence of Operation in Response to a Press on the Start Key (book) ...................................................................... 2- 3
2.2 Laser Exposure ..........................................................................................................................................2- 4
2.2.1 Overview/Configuration ........................................................................................................................................... 2- 4
2.2.1.1 Outline...................................................................................................................................................................................... 2- 4
2.2.2 Controlling the Laser ............................................................................................................................................... 2- 5
2.2.2.1 Outline...................................................................................................................................................................................... 2- 5
2.2.2.2 Laser Emission Control............................................................................................................................................................ 2- 6
2.2.2.3 Automatic Power Control (APC) .............................................................................................................................................. 2- 6
2.2.2.4 Horizontal Synchronous Control .............................................................................................................................................. 2- 6
2.2.2.5 Image Mask Control................................................................................................................................................................. 2- 6
2.2.2.6 Laser Failure Detection............................................................................................................................................................ 2- 6
2.2.3 Controlling the Laser Scanner Motor....................................................................................................................... 2- 7
2.2.3.1 Outline...................................................................................................................................................................................... 2- 7
2.2.3.2 Scanner Motor Speed Control ................................................................................................................................................. 2- 7
2.2.3.3 Scanner Motor Failure Detection ............................................................................................................................................. 2- 7
2.3 Image Formation ........................................................................................................................................2- 7
2.3.1 Overview/Configuration ........................................................................................................................................... 2- 7
2.3.1.1 Outline...................................................................................................................................................................................... 2- 7
2.3.1.2 Image Formation Process........................................................................................................................................................ 2- 8
2.3.1.3 Electrostatic Latent Image Formation Block ............................................................................................................................ 2- 9
2.3.1.4 Developing Block ..................................................................................................................................................................... 2- 9
2.3.1.5 Transfer Block........................................................................................................................................................................ 2- 10
2.3.1.6 Fixing Block............................................................................................................................................................................ 2- 11
2.3.1.7 ITB Cleaning Block ................................................................................................................................................................ 2- 12
Contents
2.3.2 Driving and Controlling the High-Voltage System..................................................................................................2- 14
2.3.2.1 Outline.................................................................................................................................................................................... 2- 14
2.3.2.2 Primary Charging Bias Generation ........................................................................................................................................ 2- 14
2.3.2.3 Developing Bias Generation .................................................................................................................................................. 2- 14
2.3.2.4 Primary Transfer Bias Generation ......................................................................................................................................... 2- 14
2.3.2.5 Secondary Transfer Bias Generation..................................................................................................................................... 2- 15
2.3.2.6 Auxiliary ITB Cleaning Bias Generation................................................................................................................................. 2- 15
2.3.2.7 ITB Cleaning Bias Generation ............................................................................................................................................... 2- 15
2.3.2.8 Fixing Bias Generation........................................................................................................................................................... 2- 15
2.3.3 Image Stabilizaton Control.....................................................................................................................................2- 15
2.3.3.1 Outline.................................................................................................................................................................................... 2- 15
2.3.3.2 Image Density Calibration (D-max) Control ........................................................................................................................... 2- 16
2.3.3.3 Image Halftone Calibration (D-half) Control........................................................................................................................... 2- 16
2.3.4 Developing Rotary .................................................................................................................................................2- 16
2.3.4.1 Outline.................................................................................................................................................................................... 2- 16
2.3.4.2 Developing Rotary Rotation Control ...................................................................................................................................... 2- 16
2.3.4.3 Developing Rotary Engaging Control..................................................................................................................................... 2- 17
2.3.4.4 Developing Rotary Position Detection ................................................................................................................................... 2- 18
2.3.5 Toner Cartridge......................................................................................................................................................2- 19
2.3.5.1 Outline.................................................................................................................................................................................... 2- 19
2.3.5.2 Memory Tag........................................................................................................................................................................... 2- 19
2.3.5.3 Memory Tag Contact Engaging Control................................................................................................................................. 2- 19
2.3.5.4 Cartridge Presence Detection................................................................................................................................................ 2- 20
2.3.5.5 Toner Cartridge Life Detection............................................................................................................................................... 2- 20
2.3.6 Drum Cartridge ......................................................................................................................................................2- 21
2.3.6.1 Outline.................................................................................................................................................................................... 2- 21
2.3.6.2 Cleaning Roller Engaging Control.......................................................................................................................................... 2- 22
2.3.6.3 Memory Tag........................................................................................................................................................................... 2- 23
2.3.6.4 Detecting the ITB Home Position........................................................................................................................................... 2- 24
2.3.6.5 Drum Cartridge Presence Detection ...................................................................................................................................... 2- 25
2.3.6.6 Checking the Life of the Drum Cartridge................................................................................................................................ 2- 26
2.3.7 Secondary Transfer Mechanism ............................................................................................................................2- 27
2.3.7.1 Outline.................................................................................................................................................................................... 2- 27
2.3.7.2 Secondary Transfer Roller Engaging Control ........................................................................................................................ 2- 28
2.3.7.3 Secondary Roller Position Detection ..................................................................................................................................... 2- 29
2.4 Pickup and Feed System ......................................................................................................................... 2- 30
2.4.1 Overview/Configuration..........................................................................................................................................2- 30
2.4.1.1 Overview ................................................................................................................................................................................ 2- 30
2.4.1.2 Pickup/Feeding Assembly...................................................................................................................................................... 2- 31
2.4.2 Other Control .........................................................................................................................................................2- 32
2.4.2.1 Skew Correction Function...................................................................................................................................................... 2- 32
2.4.2.2 Feed Speed Control............................................................................................................................................................... 2- 32
2.4.2.3 Detecting the Machine Inside Temperature ........................................................................................................................... 2- 32
2.4.3 Detection Jams ......................................................................................................................................................2- 33
2.4.3.1 Jam Detection Outline............................................................................................................................................................ 2- 33
2.4.3.2 Delay Jams ............................................................................................................................................................................ 2- 33
2.4.3.3 Stationary Jams ..................................................................................................................................................................... 2- 33
2.4.3.4 Other Jams ............................................................................................................................................................................ 2- 33
2.4.4 Cassette Pickup Unit..............................................................................................................................................2- 34
2.4.4.1 Pickup from the Cassette....................................................................................................................................................... 2- 34
2.4.5 Manual Feed Pickup Unit.......................................................................................................................................2- 34
2.4.5.1 Multi-purpose Tray Pick-up .................................................................................................................................................... 2- 34
2.5 Fixing Unit ................................................................................................................................................ 2- 34
2.5.1 Overview/Configuration..........................................................................................................................................2- 34
2.5.1.1 Outline.................................................................................................................................................................................... 2- 34
2.5.2 Various Control Mechanisms .................................................................................................................................2- 35
2.5.2.1 Controlling the Temperature of the Fixing Unit ...................................................................................................................... 2- 35
2.5.3 Protection Function ................................................................................................................................................2- 35
2.5.3.1 Flicker prevention function ..................................................................................................................................................... 2- 35
2.5.3.2 Protective Function ................................................................................................................................................................ 2- 35
Contents
2.5.3.3 Fixing Unit Failure Detection.................................................................................................................................................. 2- 36
2.6 Engine Control System .............................................................................................................................2- 36
2.6.1 Construction .......................................................................................................................................................... 2- 36
2.6.1.1 Overview ................................................................................................................................................................................ 2- 36
2.6.2 DC Controller (DCNT) ........................................................................................................................................... 2- 37
2.6.2.1 Outline.................................................................................................................................................................................... 2- 37
2.6.2.2 Operations ............................................................................................................................................................................. 2- 37
2.6.2.3 Controlling the Motors and Fans............................................................................................................................................ 2- 38
2.6.2.4 Main Motor Control ................................................................................................................................................................ 2- 38
2.6.2.5 Developing Rotary Motor Control........................................................................................................................................... 2- 39
2.6.2.6 Cooling Fan............................................................................................................................................................................ 2- 40
2.6.3 System Controller (SCNT)..................................................................................................................................... 2- 41
2.6.3.1 Outline.................................................................................................................................................................................... 2- 41
2.6.3.2 Canon Advanced Printing TechnologyÅ@(CARPS).............................................................................................................. 2- 41
Chapter 3 DISASSEMBLY AND ASSEMBLY
3.1 Cartridge Removal at Trouble Eruption Cartridge Removal at Trouble Eruption........................................3- 1
3.1.1 Cartridge Removal at Trouble Eruption ................................................................................................................... 3- 1
3.1.2 Toner cartridge removal .......................................................................................................................................... 3- 1
3.1.3 Drum cartridge removal ........................................................................................................................................... 3- 2
3.2 EXTERNAL AND CONTROLS SYSTEM ...................................................................................................3- 2
3.2.1 Front Cover.............................................................................................................................................................. 3- 2
3.2.1.1 Removing the Cassettes.......................................................................................................................................................... 3- 2
3.2.1.2 Removing the Rear Cover ....................................................................................................................................................... 3- 2
3.2.1.3 Removing the Right Cover (with the reader assembly intact).................................................................................................. 3- 2
3.2.1.4 Removing the Left Cover (with the reader assembly intact) .................................................................................................... 3- 3
3.2.1.5 Removing the Lower Front Cover ............................................................................................................................................ 3- 4
3.2.1.6 Removing the Front Cover....................................................................................................................................................... 3- 4
3.2.2 Rear Cover .............................................................................................................................................................. 3- 4
3.2.2.1 Removing the Rear Cover ....................................................................................................................................................... 3- 4
3.2.3 Top Cover................................................................................................................................................................ 3- 5
3.2.3.1 Removing the Cassettes.......................................................................................................................................................... 3- 5
3.2.3.2 Removing the Rear Cover ....................................................................................................................................................... 3- 5
3.2.3.3 Removing the Reader Assembly ............................................................................................................................................. 3- 5
3.2.3.4 Removing the Right Cover....................................................................................................................................................... 3- 6
3.2.3.5 Removing the Left Cover ......................................................................................................................................................... 3- 6
3.2.3.6 Removing the Power Supply Assembly ................................................................................................................................... 3- 6
3.2.3.7 Removing the Face-Down Cover............................................................................................................................................. 3- 6
3.2.3.8 Removing the Top Cover ......................................................................................................................................................... 3- 7
3.2.4 Right Cover.............................................................................................................................................................. 3- 8
3.2.4.1 Removing the Cassettes.......................................................................................................................................................... 3- 8
3.2.4.2 Removing the Rear Cover ....................................................................................................................................................... 3- 8
3.2.4.3 Removing the Right Cover (with the reader assembly intact).................................................................................................. 3- 8
3.2.5 Left Cover ................................................................................................................................................................ 3- 9
3.2.5.1 Removing the Cassettes.......................................................................................................................................................... 3- 9
3.2.5.2 Removing the Rear Cover ....................................................................................................................................................... 3- 9
3.2.5.3 Removing the Left Cover (with the reader assembly intact) .................................................................................................... 3- 9
3.2.6 Upper Right Cover................................................................................................................................................. 3- 10
3.2.6.1 Removing the Rear Cover ..................................................................................................................................................... 3- 10
3.2.6.2 Removing the Reader Assembly ........................................................................................................................................... 3- 10
3.2.6.3 Removing the Scanner Unit ................................................................................................................................................... 3- 11
3.2.6.4 Removing the Upper Right Cover .......................................................................................................................................... 3- 11
3.2.7 Upper Left Cover ................................................................................................................................................... 3- 11
3.2.7.1 Removing the Rear Cover ..................................................................................................................................................... 3- 11
3.2.7.2 Removing the Reader Assembly ........................................................................................................................................... 3- 12
3.2.7.3 Removing the Scanner Unit ................................................................................................................................................... 3- 13
3.2.7.4 Removing the Upper Left Cover ............................................................................................................................................ 3- 13
3.2.8 Face-up cover........................................................................................................................................................ 3- 13
3.2.8.1 Removing the Fixing Assembly.............................................................................................................................................. 3- 13
Contents
3.2.8.2 Removing the Face-Up Cover ............................................................................................................................................... 3- 13
3.2.9 Main Drive Unit ......................................................................................................................................................3- 13
3.2.9.1 Removing the Rear Cover ..................................................................................................................................................... 3- 13
3.2.9.2 Removing the Reader Assembly ........................................................................................................................................... 3- 14
3.2.9.3 Removing the Right Cover..................................................................................................................................................... 3- 15
3.2.9.4 Removing the Left Cover ....................................................................................................................................................... 3- 15
3.2.9.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 15
3.2.9.6 Removing the Face-Down Cover........................................................................................................................................... 3- 15
3.2.9.7 Removing the Top Cover ....................................................................................................................................................... 3- 15
3.2.9.8 Removing the Right Frame .................................................................................................................................................... 3- 17
3.2.9.9 Removing the Inside Cover.................................................................................................................................................... 3- 17
3.2.9.10 Removing the Shield Plate................................................................................................................................................... 3- 17
3.2.9.11 Removing the Registration Clutch........................................................................................................................................ 3- 17
3.2.9.12 Removing the Main Drive Assembly .................................................................................................................................... 3- 17
3.2.10 Operation Panel Unit............................................................................................................................................3- 18
3.2.10.1 Removing the Rear Cover.................................................................................................................................................... 3- 18
3.2.10.2 Removing the Scanner Unit ................................................................................................................................................. 3- 18
3.2.10.3 Removing the operation Panel............................................................................................................................................. 3- 18
3.2.11 SCNT Board.........................................................................................................................................................3- 19
3.2.11.1 Removing the Rear Cover.................................................................................................................................................... 3- 19
3.2.11.2 Removing the Scanner Unit ................................................................................................................................................. 3- 19
3.2.11.3 Removing the Board Unit ..................................................................................................................................................... 3- 19
3.2.11.4 Removing the SCNT Unit..................................................................................................................................................... 3- 20
3.2.12 DCNT Board.........................................................................................................................................................3- 21
3.2.12.1 Removing the Rear Cover.................................................................................................................................................... 3- 21
3.2.12.2 Removing the Reader Assembly.......................................................................................................................................... 3- 22
3.2.12.3 Removing the Right Cover ................................................................................................................................................... 3- 22
3.2.12.4 Removing the Left Cover ..................................................................................................................................................... 3- 23
3.2.12.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 23
3.2.12.6 Removing the Face-Down Cover ......................................................................................................................................... 3- 23
3.2.12.7 Removing the Top Cover ..................................................................................................................................................... 3- 23
3.2.12.8 Removing the Right Frame .................................................................................................................................................. 3- 24
3.2.12.9 Removing the Shield Plate................................................................................................................................................... 3- 24
3.2.12.10 Removing the DCNT Board................................................................................................................................................ 3- 25
3.2.13 NCU Board...........................................................................................................................................................3- 25
3.2.13.1 Removing the Rear Cover.................................................................................................................................................... 3- 25
3.2.13.2 Removing the Scanner Unit ................................................................................................................................................. 3- 25
3.2.13.3 Removing the Modular Board Cover.................................................................................................................................... 3- 26
3.2.13.4 Removing the NCU Board.................................................................................................................................................... 3- 26
3.2.14 Modular Board......................................................................................................................................................3- 26
3.2.14.1 Removing the Rear Cover.................................................................................................................................................... 3- 26
3.2.14.2 Removing the Scanner Unit ................................................................................................................................................. 3- 26
3.2.14.3 Removing the Modular Board Cover.................................................................................................................................... 3- 27
3.2.14.4 Removing the Modular PCB................................................................................................................................................. 3- 27
3.2.15 Power Supply PCB...............................................................................................................................................3- 27
3.2.15.1 Removing the Rear Cover.................................................................................................................................................... 3- 27
3.2.15.2 Removing the Reader Assembly.......................................................................................................................................... 3- 27
3.2.15.3 Removing the Power Supply Assembly ............................................................................................................................... 3- 28
3.2.15.4 Removing the Power Supply PCB ....................................................................................................................................... 3- 28
3.2.16 Print Power Supply PCB ......................................................................................................................................3- 29
3.2.16.1 Removing the Fixing Assembly............................................................................................................................................ 3- 29
3.2.16.2 Removing the Rear Cover.................................................................................................................................................... 3- 29
3.2.16.3 Removing the Reader Assembly.......................................................................................................................................... 3- 29
3.2.16.4 Removing the Right Cover ................................................................................................................................................... 3- 30
3.2.16.5 Removing the Left Cover ..................................................................................................................................................... 3- 30
3.2.16.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 30
3.2.16.7 Removing the Face-Down Cover ......................................................................................................................................... 3- 31
3.2.16.8 Removing the Top Cover ..................................................................................................................................................... 3- 31
3.2.16.9 Removing the Right Frame .................................................................................................................................................. 3- 32
3.2.16.10 Removing the Left Frame................................................................................................................................................... 3- 32
3.2.16.11 Removing the Cassette Feeder.......................................................................................................................................... 3- 32
Contents
3.2.16.12 Removing the Shield Plate ................................................................................................................................................. 3- 32
3.2.16.13 Removing the Fan Duct...................................................................................................................................................... 3- 32
3.2.16.14 Removing the Lower Case Assembly ................................................................................................................................ 3- 33
3.2.16.15 Removing the Printer Power Supply PCB .......................................................................................................................... 3- 33
3.2.17 High-voitage Power Supply PCB ......................................................................................................................... 3- 33
3.2.17.1 Removing the Fixing Assembly............................................................................................................................................ 3- 33
3.2.17.2 Removing the Rear Cover.................................................................................................................................................... 3- 34
3.2.17.3 Removing the Reader Assembly.......................................................................................................................................... 3- 34
3.2.17.4 Removing the Right Cover ................................................................................................................................................... 3- 35
3.2.17.5 Removing the Left Cover ..................................................................................................................................................... 3- 35
3.2.17.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 35
3.2.17.7 Removing the Face-Down Cover ......................................................................................................................................... 3- 36
3.2.17.8 Removing the Top Cover ..................................................................................................................................................... 3- 36
3.2.17.9 Removing the Right Frame .................................................................................................................................................. 3- 37
3.2.17.10 Removing the Left Frame................................................................................................................................................... 3- 37
3.2.17.11 Removing the Cassette Feeder.......................................................................................................................................... 3- 37
3.2.17.12 Removing the Shield Plate ................................................................................................................................................. 3- 37
3.2.17.13 Removing the Fan Duct...................................................................................................................................................... 3- 37
3.2.17.14 Removing the Lower Case Assembly ................................................................................................................................ 3- 38
3.2.17.15 Removing the Sub High-Voltage Power Supply PCB Unit ................................................................................................. 3- 38
3.2.17.16 Removing the High-Voltage Power Supply PCB................................................................................................................ 3- 38
3.2.18 Sub High-Voltage Power Supply PCB ................................................................................................................. 3- 38
3.2.18.1 Removing the Fixing Assembly............................................................................................................................................ 3- 38
3.2.18.2 Removing the Rear Cover.................................................................................................................................................... 3- 39
3.2.18.3 Removing the Reader Assembly.......................................................................................................................................... 3- 39
3.2.18.4 Removing the Right Cover ................................................................................................................................................... 3- 40
3.2.18.5 Removing the Left Cover ..................................................................................................................................................... 3- 40
3.2.18.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 40
3.2.18.7 Removing the Face-Down Cover ......................................................................................................................................... 3- 41
3.2.18.8 Removing the Top Cover ..................................................................................................................................................... 3- 41
3.2.18.9 Removing the Right Frame .................................................................................................................................................. 3- 42
3.2.18.10 Removing the Left Frame................................................................................................................................................... 3- 42
3.2.18.11 Removing the Cassette Feeder.......................................................................................................................................... 3- 42
3.2.18.12 Removing the Shield Plate ................................................................................................................................................. 3- 42
3.2.18.13 Removing the Fan Duct...................................................................................................................................................... 3- 42
3.2.18.14 Removing the Lower Case Assembly ................................................................................................................................ 3- 43
3.2.18.15 Removing the Sub High-voltage Power Supply Board....................................................................................................... 3- 43
3.2.19 Internal Temperature Detection Thermistor......................................................................................................... 3- 43
3.2.19.1 Removing the Rear Cover.................................................................................................................................................... 3- 43
3.2.19.2 Removing the Reader Assembly.......................................................................................................................................... 3- 44
3.2.19.3 Removing the Right Cover ................................................................................................................................................... 3- 44
3.2.19.4 Removing the Left Cover ..................................................................................................................................................... 3- 45
3.2.19.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 45
3.2.19.6 Removing the Face-Down Cover ......................................................................................................................................... 3- 45
3.2.19.7 Removing the Top Cover ..................................................................................................................................................... 3- 45
3.2.19.8 Removing the Right Frame .................................................................................................................................................. 3- 46
3.2.19.9 Removing the Shield Plate................................................................................................................................................... 3- 46
3.2.19.10 Removing the Machine Inside Temperature Thermistor .................................................................................................... 3- 47
3.2.20 Cooling Fan ......................................................................................................................................................... 3- 47
3.2.20.1 Removing the Rear Cover.................................................................................................................................................... 3- 47
3.2.20.2 Removing the Reader Assembly.......................................................................................................................................... 3- 47
3.2.20.3 Removing the Right Cover ................................................................................................................................................... 3- 48
3.2.20.4 Removing the Left Cover ..................................................................................................................................................... 3- 48
3.2.20.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 49
3.2.20.6 Removing the Face-Down Cover ......................................................................................................................................... 3- 49
3.2.20.7 Removing the Top Cover ..................................................................................................................................................... 3- 49
3.2.20.8 Removing the Left Frame..................................................................................................................................................... 3- 50
3.2.20.9 Removing the Fan Duct ....................................................................................................................................................... 3- 50
3.2.20.10 Removing the Cooling Fan................................................................................................................................................. 3- 50
3.3 Document Feed/Exposure System ...........................................................................................................3- 51
3.3.1 Scanner Unit.......................................................................................................................................................... 3- 51
Contents
3.3.1.1 Removing the Rear Cover ..................................................................................................................................................... 3- 51
3.3.1.2 Removing the Scanner Unit ................................................................................................................................................... 3- 51
3.3.2 ADF Unit ................................................................................................................................................................3- 51
3.3.2.1 Removing the Rear Cover ..................................................................................................................................................... 3- 51
3.3.2.2 Removing the Scanner Unit ................................................................................................................................................... 3- 52
3.3.2.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 52
3.3.2.4 Removing the ADF Unit ......................................................................................................................................................... 3- 52
3.3.2.5 Points to Note When Mounting the ADF Unit......................................................................................................................... 3- 53
3.3.3 Scanner Cover Unit................................................................................................................................................3- 53
3.3.3.1 Removing the Rear Cover ..................................................................................................................................................... 3- 53
3.3.3.2 Removing the Scanner Unit ................................................................................................................................................... 3- 53
3.3.3.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 54
3.3.3.4 Removing the ADF Unit ......................................................................................................................................................... 3- 54
3.3.3.5 Removing the operation Panel............................................................................................................................................... 3- 54
3.3.3.6 Removing the Scanner Cover Unit ........................................................................................................................................ 3- 55
3.3.4 CCD Unit................................................................................................................................................................3- 55
3.3.4.1 Removing the Rear Cover ..................................................................................................................................................... 3- 55
3.3.4.2 Removing the Scanner Unit ................................................................................................................................................... 3- 55
3.3.4.3 Removing the NCU Board ..................................................................................................................................................... 3- 56
3.3.4.4 Removing the SCNT Board Unit ............................................................................................................................................ 3- 56
3.3.4.5 Removing the ADF Unit ......................................................................................................................................................... 3- 56
3.3.4.6 Removing the operation Panel............................................................................................................................................... 3- 57
3.3.4.7 Removing the Scanner Cover Unit ........................................................................................................................................ 3- 57
3.3.4.8 Removing the Flat Bed Motor Unit......................................................................................................................................... 3- 57
3.3.4.9 Removing the CCD Unit......................................................................................................................................................... 3- 57
3.3.5 Separation Guide Unit............................................................................................................................................3- 57
3.3.5.1 Removing the Rear Cover ..................................................................................................................................................... 3- 57
3.3.5.2 Removing the Scanner Unit ................................................................................................................................................... 3- 58
3.3.5.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 58
3.3.5.4 Removing the ADF Unit ......................................................................................................................................................... 3- 58
3.3.5.5 Points to Note When Mounting the ADF Unit......................................................................................................................... 3- 59
3.3.5.6 Removing the Document Pickup Roller Unit.......................................................................................................................... 3- 59
3.3.5.7 Removing the Separation guide unit...................................................................................................................................... 3- 60
3.3.6 Feed Roller ............................................................................................................................................................3- 60
3.3.6.1 Removing the Rear Cover ..................................................................................................................................................... 3- 60
3.3.6.2 Removing the Scanner Unit ................................................................................................................................................... 3- 60
3.3.6.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 61
3.3.6.4 Removing the ADF Unit ......................................................................................................................................................... 3- 61
3.3.6.5 Points to Note When Mounting the ADF Unit......................................................................................................................... 3- 61
3.3.6.6 Removing the Document feed roller ...................................................................................................................................... 3- 61
3.3.7 Pickup Roller Unit ..................................................................................................................................................3- 63
3.3.7.1 Removing the Rear Cover ..................................................................................................................................................... 3- 63
3.3.7.2 Removing the Scanner Unit ................................................................................................................................................... 3- 63
3.3.7.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 63
3.3.7.4 Removing the ADF Unit ......................................................................................................................................................... 3- 64
3.3.7.5 Points to Note When Mounting the ADF Unit......................................................................................................................... 3- 64
3.3.7.6 Removing the Document Pickup Roller Unit.......................................................................................................................... 3- 64
3.3.8 Reader Unit............................................................................................................................................................3- 65
3.3.8.1 Removing the Rear Cover ..................................................................................................................................................... 3- 65
3.3.8.2 Removing the Reader Assembly ........................................................................................................................................... 3- 65
3.3.9 Flatbed Motor Unit .................................................................................................................................................3- 66
3.3.9.1 Removing the Rear Cover ..................................................................................................................................................... 3- 66
3.3.9.2 Removing the Scanner Unit ................................................................................................................................................... 3- 67
3.3.9.3 Removing the SCNT Board Unit ............................................................................................................................................ 3- 67
3.3.9.4 Removing the ADF Unit ......................................................................................................................................................... 3- 67
3.3.9.5 Removing the operation Panel............................................................................................................................................... 3- 68
3.3.9.6 Removing the Scanner Cover Unit ........................................................................................................................................ 3- 68
3.3.9.7 Removing the Flat Bed Motor Unit......................................................................................................................................... 3- 68
3.3.10 Document Feed Motor .........................................................................................................................................3- 68
3.3.10.1 Removing the Rear Cover.................................................................................................................................................... 3- 68
3.3.10.2 Removing the Scanner Unit ................................................................................................................................................. 3- 69
Contents
3.3.10.3 Removing the SCNT Board Unit .......................................................................................................................................... 3- 69
3.3.10.4 Removing the ADF Unit ....................................................................................................................................................... 3- 69
3.3.10.5 Points to Note When Mounting the ADF Unit....................................................................................................................... 3- 70
3.3.10.6 Removing the Document feed motor ................................................................................................................................... 3- 70
3.3.11 DS Sensor ........................................................................................................................................................... 3- 70
3.3.11.1 Removing the ADF Paper Sensor........................................................................................................................................ 3- 70
3.3.12 DES Sensor ......................................................................................................................................................... 3- 71
3.3.12.1 Removing the ADF Feed Sensor ......................................................................................................................................... 3- 71
3.3.13 Speaker ............................................................................................................................................................... 3- 71
3.3.13.1 Removing the Rear Cover.................................................................................................................................................... 3- 71
3.3.13.2 Removing the Scanner Unit ................................................................................................................................................. 3- 72
3.3.13.3 Removing the SCNT Board Unit .......................................................................................................................................... 3- 72
3.3.13.4 Removing the Speaker......................................................................................................................................................... 3- 72
3.4 LASER EXPOSURE SYSTEM .................................................................................................................3- 72
3.4.1 Laser/Scanner Unit................................................................................................................................................ 3- 72
3.4.1.1 Removing the Rear Cover ..................................................................................................................................................... 3- 72
3.4.1.2 Removing the Reader Assembly ........................................................................................................................................... 3- 73
3.4.1.3 Removing the Right Cover..................................................................................................................................................... 3- 74
3.4.1.4 Removing the Left Cover ....................................................................................................................................................... 3- 74
3.4.1.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 74
3.4.1.6 Removing the Face-Down Cover........................................................................................................................................... 3- 74
3.4.1.7 Removing the Top Cover ....................................................................................................................................................... 3- 74
3.4.1.8 Removing the Laser Scanner Unit ......................................................................................................................................... 3- 76
3.5 IMAGE FORMATION SYSTEM................................................................................................................3- 76
3.5.1 Rotary Drive Unit ................................................................................................................................................... 3- 76
3.5.1.1 Removing the Rear Cover ..................................................................................................................................................... 3- 76
3.5.1.2 Removing the Reader Assembly ........................................................................................................................................... 3- 76
3.5.1.3 Removing the Right Cover..................................................................................................................................................... 3- 77
3.5.1.4 Removing the Left Cover ....................................................................................................................................................... 3- 77
3.5.1.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 78
3.5.1.6 Removing the Face-Down Cover........................................................................................................................................... 3- 78
3.5.1.7 Removing the Top Cover ....................................................................................................................................................... 3- 78
3.5.1.8 Removing the Right Frame .................................................................................................................................................... 3- 79
3.5.1.9 Removing the Shield Plate..................................................................................................................................................... 3- 79
3.5.1.10 Removing the Rotary Drive Assembly ................................................................................................................................. 3- 79
3.5.2 Drum Cartridge Memory Tag Contact ................................................................................................................... 3- 80
3.5.2.1 Removing the Rear Cover ..................................................................................................................................................... 3- 80
3.5.2.2 Removing the Reader Assembly ........................................................................................................................................... 3- 80
3.5.2.3 Removing the Right Cover..................................................................................................................................................... 3- 81
3.5.2.4 Removing the Left Cover ....................................................................................................................................................... 3- 81
3.5.2.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 82
3.5.2.6 Removing the Face-Down Cover........................................................................................................................................... 3- 82
3.5.2.7 Removing the Top Cover ....................................................................................................................................................... 3- 82
3.5.2.8 Removing the Right Frame .................................................................................................................................................... 3- 83
3.5.2.9 Removing the Shield Plate..................................................................................................................................................... 3- 83
3.5.2.10 Removing the Inside Cover.................................................................................................................................................. 3- 83
3.5.2.11 Removing the Drum Cartridge Memory Tag Contact........................................................................................................... 3- 84
3.5.3 Developing Rotary Unit.......................................................................................................................................... 3- 84
3.5.3.1 Removing the Rear Cover ..................................................................................................................................................... 3- 84
3.5.3.2 Removing the Reader Assembly ........................................................................................................................................... 3- 84
3.5.3.3 Removing the Right Cover..................................................................................................................................................... 3- 85
3.5.3.4 Removing the Left Cover ....................................................................................................................................................... 3- 85
3.5.3.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 86
3.5.3.6 Removing the Face-Down Cover........................................................................................................................................... 3- 86
3.5.3.7 Removing the Top Cover ....................................................................................................................................................... 3- 86
3.5.3.8 Removing the Right Frame .................................................................................................................................................... 3- 87
3.5.3.9 Removing the Shield Plate..................................................................................................................................................... 3- 87
3.5.3.10 Removing the Inside Cover.................................................................................................................................................. 3- 87
3.5.3.11 Removing the Registration Clutch........................................................................................................................................ 3- 88
3.5.3.12 Removing the Main Drive Assembly .................................................................................................................................... 3- 88
3.5.3.13 Removing the Rotary Drive Assembly ................................................................................................................................. 3- 88
Contents
3.5.3.14 Removing the Left Frame..................................................................................................................................................... 3- 89
3.5.3.15 Removing the Fan Duct ....................................................................................................................................................... 3- 89
3.5.3.16 Removing the Laser Scanner Unit Base .............................................................................................................................. 3- 89
3.5.3.17 Removing the Developing Rotary Assembly........................................................................................................................ 3- 89
3.5.4 Engaging Motor......................................................................................................................................................3- 90
3.5.4.1 Removing the Rear Cover ..................................................................................................................................................... 3- 90
3.5.4.2 Removing the Reader Assembly ........................................................................................................................................... 3- 90
3.5.4.3 Removing the Right Cover..................................................................................................................................................... 3- 91
3.5.4.4 Removing the Left Cover ....................................................................................................................................................... 3- 91
3.5.4.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 92
3.5.4.6 Removing the Face-Down Cover........................................................................................................................................... 3- 92
3.5.4.7 Removing the Top Cover ....................................................................................................................................................... 3- 92
3.5.4.8 Removing the Left Frame ...................................................................................................................................................... 3- 93
3.5.4.9 Removing the Shift Motor ...................................................................................................................................................... 3- 93
3.5.5 Developing Rotary Motor .......................................................................................................................................3- 93
3.5.5.1 Removing the Rear Cover ..................................................................................................................................................... 3- 93
3.5.5.2 Removing the Reader Assembly ........................................................................................................................................... 3- 94
3.5.5.3 Removing the Right Cover..................................................................................................................................................... 3- 95
3.5.5.4 Removing the Left Cover ....................................................................................................................................................... 3- 95
3.5.5.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 95
3.5.5.6 Removing the Face-Down Cover........................................................................................................................................... 3- 95
3.5.5.7 Removing the Top Cover ....................................................................................................................................................... 3- 95
3.5.5.8 Removing the Right Frame .................................................................................................................................................... 3- 97
3.5.5.9 Removing the Shield Plate..................................................................................................................................................... 3- 97
3.5.5.10 Removing the Rotary Drive Assembly ................................................................................................................................. 3- 97
3.5.5.11 Removing the Developing Rotary Motor .............................................................................................................................. 3- 97
3.5.6 Developing Rotary Stopper Solenoid.....................................................................................................................3- 97
3.5.6.1 Removing the Rear Cover ..................................................................................................................................................... 3- 97
3.5.6.2 Removing the Reader Assembly ........................................................................................................................................... 3- 98
3.5.6.3 Removing the Right Cover..................................................................................................................................................... 3- 99
3.5.6.4 Removing the Left Cover ....................................................................................................................................................... 3- 99
3.5.6.5 Removing the Power Supply Assembly ................................................................................................................................. 3- 99
3.5.6.6 Removing the Face-Down Cover........................................................................................................................................... 3- 99
3.5.6.7 Removing the Top Cover ....................................................................................................................................................... 3- 99
3.5.6.8 Removing the Right Frame .................................................................................................................................................. 3- 101
3.5.6.9 Removing the Shield Plate................................................................................................................................................... 3- 101
3.5.6.10 Removing the Rotary Drive Assembly ............................................................................................................................... 3- 101
3.5.6.11 Removing the Toner Cartridge Motor................................................................................................................................. 3- 101
3.5.6.12 Removing the Developing Rotary Motor ............................................................................................................................ 3- 101
3.5.6.13 Removing the Developing Rotary Stopper Solenoid.......................................................................................................... 3- 102
3.5.7 Density Detection PCB ........................................................................................................................................3- 102
3.5.7.1 Removing the Rear Cover ................................................................................................................................................... 3- 102
3.5.7.2 Removing the Reader Assembly ......................................................................................................................................... 3- 102
3.5.7.3 Removing the Right Cover................................................................................................................................................... 3- 103
3.5.7.4 Removing the Left Cover ..................................................................................................................................................... 3- 103
3.5.7.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 104
3.5.7.6 Removing the Face-Down Cover......................................................................................................................................... 3- 104
3.5.7.7 Removing the Top Cover ..................................................................................................................................................... 3- 104
3.5.7.8 Removing the Inside Cover.................................................................................................................................................. 3- 105
3.5.7.9 Removing the Dust-Blocking Cover ..................................................................................................................................... 3- 105
3.5.7.10 Removing the Density Detection PCB ............................................................................................................................... 3- 105
3.5.8 ITB Home Position Detection PCB ......................................................................................................................3- 106
3.5.8.1 Removing the Rear Cover ................................................................................................................................................... 3- 106
3.5.8.2 Removing the Reader Assembly ......................................................................................................................................... 3- 106
3.5.8.3 Removing the Right Cover................................................................................................................................................... 3- 107
3.5.8.4 Removing the Left Cover ..................................................................................................................................................... 3- 107
3.5.8.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 107
3.5.8.6 Removing the Face-Down Cover......................................................................................................................................... 3- 107
3.5.8.7 Removing the Top Cover ..................................................................................................................................................... 3- 108
3.5.8.8 Removing the Inside Cover.................................................................................................................................................. 3- 109
3.5.8.9 Removing the ITB Home Position Detection PCB ............................................................................................................... 3- 109
Contents
3.5.9 Transfer Charging Roller ..................................................................................................................................... 3- 109
3.5.9.1 Removing the Transfer Charging Roller .............................................................................................................................. 3- 109
3.5.10 Waste toner Detection PCB............................................................................................................................... 3- 110
3.5.10.1 Removing the Rear Cover.................................................................................................................................................. 3- 110
3.5.10.2 Removing the Reader Assembly........................................................................................................................................ 3- 110
3.5.10.3 Removing the Right Cover ................................................................................................................................................. 3- 111
3.5.10.4 Removing the Left Cover ................................................................................................................................................... 3- 111
3.5.10.5 Removing the Power Supply Assembly ............................................................................................................................. 3- 111
3.5.10.6 Removing the Face-Down Cover ....................................................................................................................................... 3- 112
3.5.10.7 Removing the Top Cover ................................................................................................................................................... 3- 112
3.5.10.8 Removing the Right Frame ................................................................................................................................................ 3- 113
3.5.10.9 Removing the Registration Clutch...................................................................................................................................... 3- 113
3.5.10.10 Removing the Main Drive Assembly ................................................................................................................................ 3- 113
3.5.10.11 Removing the Waste Toner Detection PCB ..................................................................................................................... 3- 114
3.5.11 Developing Rotary/Toner Level Detection PCB................................................................................................. 3- 114
3.5.11.1 Removing the Rear Cover.................................................................................................................................................. 3- 114
3.5.11.2 Removing the Reader Assembly........................................................................................................................................ 3- 114
3.5.11.3 Removing the Right Cover ................................................................................................................................................. 3- 115
3.5.11.4 Removing the Left Cover ................................................................................................................................................... 3- 115
3.5.11.5 Removing the Power Supply Assembly ............................................................................................................................. 3- 116
3.5.11.6 Removing the Face-Down Cover ....................................................................................................................................... 3- 116
3.5.11.7 Removing the Top Cover ................................................................................................................................................... 3- 116
3.5.11.8 Removing the Right Frame ................................................................................................................................................ 3- 117
3.5.11.9 Removing the Registration Clutch...................................................................................................................................... 3- 117
3.5.11.10 Removing the Main Drive Assembly ................................................................................................................................ 3- 117
3.5.11.11 Removing the Rotary Drive Assembly.............................................................................................................................. 3- 118
3.5.11.12 Removing the Left Frame................................................................................................................................................. 3- 119
3.5.11.13 Removing the Fan Duct.................................................................................................................................................... 3- 119
3.5.11.14 Removing the Laser Scanner Unit Base .......................................................................................................................... 3- 119
3.5.11.15 Removing the Developing Rotary Assembly .................................................................................................................... 3- 119
3.5.11.16 Removing the Developing Rotary/Toner Level Detection PCB ........................................................................................ 3- 120
3.5.12 Toner Cartridge Motor ....................................................................................................................................... 3- 120
3.5.12.1 Removing the Rear Cover.................................................................................................................................................. 3- 120
3.5.12.2 Removing the Reader Assembly........................................................................................................................................ 3- 121
3.5.12.3 Removing the Right Cover ................................................................................................................................................. 3- 121
3.5.12.4 Removing the Left Cover ................................................................................................................................................... 3- 121
3.5.12.5 Removing the Power Supply Assembly ............................................................................................................................. 3- 122
3.5.12.6 Removing the Face-Down Cover ....................................................................................................................................... 3- 122
3.5.12.7 Removing the Top Cover ................................................................................................................................................... 3- 122
3.5.12.8 Removing the Right Frame ................................................................................................................................................ 3- 123
3.5.12.9 Removing the Shield Plate................................................................................................................................................. 3- 123
3.5.12.10 Removing the Rotary Drive Assembly.............................................................................................................................. 3- 123
3.5.12.11 Removing the Toner Cartridge Motor............................................................................................................................... 3- 124
3.6 PICKUP AND FEEDING SYSTEM .........................................................................................................3- 124
3.6.1 Cassette Pickup Roller ........................................................................................................................................ 3- 124
3.6.1.1 Removing the Cassettes...................................................................................................................................................... 3- 124
3.6.1.2 Removing the Rear Cover ................................................................................................................................................... 3- 124
3.6.1.3 Removing the Right Cover................................................................................................................................................... 3- 124
3.6.1.4 Removing the Left Cover ..................................................................................................................................................... 3- 125
3.6.1.5 Removing the Cassette Pickup Roller ................................................................................................................................. 3- 125
3.6.2 Cassette Paper Sensor ....................................................................................................................................... 3- 125
3.6.2.1 Removing the Cassettes...................................................................................................................................................... 3- 125
3.6.2.2 Removing the Rear Cover ................................................................................................................................................... 3- 125
3.6.2.3 Removing the Reader Assembly ......................................................................................................................................... 3- 126
3.6.2.4 Removing the Right Cover................................................................................................................................................... 3- 127
3.6.2.5 Removing the Left Cover ..................................................................................................................................................... 3- 127
3.6.2.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 127
3.6.2.7 Removing the Face-Down Cover......................................................................................................................................... 3- 127
3.6.2.8 Removing the Top Cover ..................................................................................................................................................... 3- 127
3.6.2.9 Removing the Right Frame .................................................................................................................................................. 3- 129
3.6.2.10 Removing the Left Frame................................................................................................................................................... 3- 129
Contents
3.6.2.11 Removing the Cassette Feeder ......................................................................................................................................... 3- 129
3.6.2.12 Removing the Cassette Paper Sensor............................................................................................................................... 3- 129
3.6.3 Cassette Feed Sensor .........................................................................................................................................3- 129
3.6.3.1 Removing the Cassettes...................................................................................................................................................... 3- 129
3.6.3.2 Removing the Rear Cover ................................................................................................................................................... 3- 129
3.6.3.3 Removing the Reader Assembly ......................................................................................................................................... 3- 130
3.6.3.4 Removing the Right Cover................................................................................................................................................... 3- 131
3.6.3.5 Removing the Left Cover ..................................................................................................................................................... 3- 131
3.6.3.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 131
3.6.3.7 Removing the Face-Down Cover......................................................................................................................................... 3- 131
3.6.3.8 Removing the Top Cover ..................................................................................................................................................... 3- 131
3.6.3.9 Removing the Right Frame .................................................................................................................................................. 3- 133
3.6.3.10 Removing the Left Frame................................................................................................................................................... 3- 133
3.6.3.11 Removing the Cassette Feeder ......................................................................................................................................... 3- 133
3.6.3.12 Removing the Cassette Feed Sensor ................................................................................................................................ 3- 133
3.6.4 Cassette Pickup Solenoid ....................................................................................................................................3- 134
3.6.4.1 Removing the Cassettes...................................................................................................................................................... 3- 134
3.6.4.2 Removing the Rear Cover ................................................................................................................................................... 3- 134
3.6.4.3 Removing the Reader Assembly ......................................................................................................................................... 3- 134
3.6.4.4 Removing the Right Cover................................................................................................................................................... 3- 135
3.6.4.5 Removing the Left Cover ..................................................................................................................................................... 3- 135
3.6.4.6 Removing the Power Supply Assembly ............................................................................................................................... 3- 135
3.6.4.7 Removing the Face-Down Cover......................................................................................................................................... 3- 135
3.6.4.8 Removing the Top Cover ..................................................................................................................................................... 3- 136
3.6.4.9 Removing the Right Frame .................................................................................................................................................. 3- 137
3.6.4.10 Removing the Left Frame................................................................................................................................................... 3- 137
3.6.4.11 Removing the Cassette Feeder ......................................................................................................................................... 3- 137
3.6.4.12 Removing the Cassette Pickup Solenoid ........................................................................................................................... 3- 137
3.6.5 Cassette Separation Pad .....................................................................................................................................3- 137
3.6.5.1 Removing the Cassette........................................................................................................................................................ 3- 137
3.6.5.2 Removing the Front of the Cassette .................................................................................................................................... 3- 137
3.6.5.3 Removing the Cassette Separation Pad.............................................................................................................................. 3- 138
3.6.6 Manual Pickup Roller ...........................................................................................................................................3- 138
3.6.6.1 Removing the Manual Pickup Roller.................................................................................................................................... 3- 138
3.6.7 Manual Pickup Solenoid ......................................................................................................................................3- 138
3.6.7.1 Removing the Rear Cover ................................................................................................................................................... 3- 138
3.6.7.2 Removing the Reader Assembly ......................................................................................................................................... 3- 139
3.6.7.3 Removing the Right Cover................................................................................................................................................... 3- 140
3.6.7.4 Removing the Left Cover ..................................................................................................................................................... 3- 140
3.6.7.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 140
3.6.7.6 Removing the Face-Down Cover......................................................................................................................................... 3- 140
3.6.7.7 Removing the Top Cover ..................................................................................................................................................... 3- 140
3.6.7.8 Removing the Right Frame .................................................................................................................................................. 3- 142
3.6.7.9 Removing the Shield Plate................................................................................................................................................... 3- 142
3.6.7.10 Removing the Inside Cover................................................................................................................................................ 3- 142
3.6.7.11 Removing the Registration Clutch...................................................................................................................................... 3- 142
3.6.7.12 Removing the Main Drive Assembly .................................................................................................................................. 3- 142
3.6.7.13 Removing the Manual Pickup Feed Solenoid .................................................................................................................... 3- 143
3.6.8 Manual Separation Roller ....................................................................................................................................3- 143
3.6.8.1 Removing the Cassettes...................................................................................................................................................... 3- 143
3.6.8.2 Removing the Rear Cover ................................................................................................................................................... 3- 143
3.6.8.3 Removing the Right Cover (with the reader assembly intact).............................................................................................. 3- 143
3.6.8.4 Removing the Left Cover (with the reader assembly intact) ................................................................................................ 3- 144
3.6.8.5 Removing the Lower Front Cover ........................................................................................................................................ 3- 145
3.6.8.6 Removing the Front Cover................................................................................................................................................... 3- 145
3.6.8.7 Removing the Manual Feed Pickup Separation Pad ........................................................................................................... 3- 145
3.6.9 Registration Detection PCB .................................................................................................................................3- 145
3.6.9.1 Removing the Fixing Assembly............................................................................................................................................ 3- 145
3.6.9.2 Removing the Fixing Assembly............................................................................................................................................ 3- 146
3.6.9.3 Removing the Rear Cover ................................................................................................................................................... 3- 146
3.6.9.4 Removing the Reader Assembly ......................................................................................................................................... 3- 146
Contents
3.6.9.5 Removing the Right Cover................................................................................................................................................... 3- 147
3.6.9.6 Removing the Left Cover ..................................................................................................................................................... 3- 147
3.6.9.7 Removing the Power Supply Assembly ............................................................................................................................... 3- 148
3.6.9.8 Removing the Face-Down Cover......................................................................................................................................... 3- 148
3.6.9.9 Removing the Top Cover ..................................................................................................................................................... 3- 148
3.6.9.10 Removing the Right Frame ................................................................................................................................................ 3- 149
3.6.9.11 Removing the Left Frame................................................................................................................................................... 3- 149
3.6.9.12 Removing the Cassette Feeder ......................................................................................................................................... 3- 149
3.6.9.13 Removing the Shield Plate................................................................................................................................................. 3- 150
3.6.9.14 Removing the Fan Duct ..................................................................................................................................................... 3- 150
3.6.9.15 Removing the Lower Case Assembly ................................................................................................................................ 3- 150
3.6.9.16 Removing the Registration Detection PCB ........................................................................................................................ 3- 150
3.6.10 Main Motor......................................................................................................................................................... 3- 151
3.6.10.1 Removing the Rear Cover.................................................................................................................................................. 3- 151
3.6.10.2 Removing the Reader Assembly........................................................................................................................................ 3- 151
3.6.10.3 Removing the Right Cover ................................................................................................................................................. 3- 152
3.6.10.4 Removing the Left Cover ................................................................................................................................................... 3- 152
3.6.10.5 Removing the Power Supply Assembly ............................................................................................................................. 3- 152
3.6.10.6 Removing the Face-Down Cover ....................................................................................................................................... 3- 152
3.6.10.7 Removing the Top Cover ................................................................................................................................................... 3- 153
3.6.10.8 Removing the Right Frame ................................................................................................................................................ 3- 154
3.6.10.9 Removing the Shield Plate................................................................................................................................................. 3- 154
3.6.10.10 Removing the Inside Cover .............................................................................................................................................. 3- 154
3.6.10.11 Removing the Registration Clutch.................................................................................................................................... 3- 154
3.6.10.12 Removing the Main Drive Assembly ................................................................................................................................ 3- 154
3.6.10.13 Removing the Main Motor ................................................................................................................................................ 3- 155
3.7 FIXING SYSTEM ....................................................................................................................................3- 155
3.7.1 Fixing Unit............................................................................................................................................................ 3- 155
3.7.1.1 Removing the Fixing Assembly............................................................................................................................................ 3- 155
3.7.2 Fixing Film Unit.................................................................................................................................................... 3- 155
3.7.2.1 Removing the Fixing Assembly............................................................................................................................................ 3- 155
3.7.2.2 Removing the Face-Up Cover ............................................................................................................................................. 3- 155
3.7.2.3 Removing the Fixing Film Unit ............................................................................................................................................. 3- 156
3.7.3 Fixing Pressure Roller ......................................................................................................................................... 3- 157
3.7.3.1 Removing the Fixing Assembly............................................................................................................................................ 3- 157
3.7.3.2 Removing the Face-Up Cover ............................................................................................................................................. 3- 157
3.7.3.3 Removing the Fixing Film Unit ............................................................................................................................................. 3- 157
3.7.3.4 Removing the Fixing Pressure Roller .................................................................................................................................. 3- 159
3.7.4 Fixing Delivery Paper Sensor .............................................................................................................................. 3- 159
3.7.4.1 Removing the Fixing Assembly............................................................................................................................................ 3- 159
3.7.4.2 Removing the Face-Up Cover ............................................................................................................................................. 3- 159
3.7.5 Pre-Fixing Paper Detection Sensor ..................................................................................................................... 3- 159
3.7.5.1 Removing the Rear Cover ................................................................................................................................................... 3- 159
3.7.5.2 Removing the Reader Assembly ......................................................................................................................................... 3- 160
3.7.5.3 Removing the Right Cover................................................................................................................................................... 3- 161
3.7.5.4 Removing the Left Cover ..................................................................................................................................................... 3- 161
3.7.5.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 161
3.7.5.6 Removing the Face-Down Cover......................................................................................................................................... 3- 161
3.7.5.7 Removing the Top Cover ..................................................................................................................................................... 3- 161
3.7.5.8 Removing the Right Frame .................................................................................................................................................. 3- 163
3.7.5.9 Removing the Left Frame .................................................................................................................................................... 3- 163
3.7.5.10 Removing the Cassette Feeder ......................................................................................................................................... 3- 163
3.7.5.11 Removing the Shield Plate................................................................................................................................................. 3- 163
3.7.5.12 Removing the Inside Cover................................................................................................................................................ 3- 163
3.7.5.13 Removing the Registration Clutch...................................................................................................................................... 3- 163
3.7.5.14 Removing the Main Drive Assembly .................................................................................................................................. 3- 164
3.7.5.15 Removing the Toner Tray .................................................................................................................................................. 3- 164
3.7.5.16 Removing the Fixing Front Paper Sensor Spacer.............................................................................................................. 3- 164
3.7.5.17 Removing the Fan Duct ..................................................................................................................................................... 3- 164
3.7.5.18 Removing the Lower Case Assembly ................................................................................................................................ 3- 165
3.7.5.19 Removing the Fixing Front Paper Sensor .......................................................................................................................... 3- 165
Contents
3.7.6 Fixing Motor .........................................................................................................................................................3- 165
3.7.6.1 Removing the Rear Cover ................................................................................................................................................... 3- 165
3.7.6.2 Removing the Reader Assembly ......................................................................................................................................... 3- 166
3.7.6.3 Removing the Right Cover................................................................................................................................................... 3- 167
3.7.6.4 Removing the Left Cover ..................................................................................................................................................... 3- 167
3.7.6.5 Removing the Power Supply Assembly ............................................................................................................................... 3- 167
3.7.6.6 Removing the Face-Down Cover......................................................................................................................................... 3- 167
3.7.6.7 Removing the Top Cover ..................................................................................................................................................... 3- 167
3.7.6.8 Removing the Right Frame .................................................................................................................................................. 3- 169
3.7.6.9 Removing the Shield Plate................................................................................................................................................... 3- 169
3.7.6.10 Removing the Fixing Motor ................................................................................................................................................ 3- 169
Chapter 4 MAINTENANCE AND INSPECTION
4.1 User Maintenance ...................................................................................................................................... 4- 1
4.1.1 Cleaning the Scanning Area ....................................................................................................................................4- 1
4.1.2 Cleaning the ADF Area ............................................................................................................................................4- 1
4.1.3 Toner Cartridge........................................................................................................................................................4- 1
4.1.4 Drum Cartridge ........................................................................................................................................................4- 1
4.1.5 Mylar Sheet..............................................................................................................................................................4- 1
4.1.6 Pressure Roller (fixing assembly) ............................................................................................................................4- 1
4.1.7 Density Sensor/ITB Home Position Sensor .............................................................................................................4- 2
4.2 Periodically Replaced Parts ....................................................................................................................... 4- 2
4.2.1 Periodic Replacement Parts ....................................................................................................................................4- 2
4.3 Consumables ............................................................................................................................................. 4- 2
4.3.1 Expected Service Life of Consumable Parts............................................................................................................4- 2
4.4 Periodical Service....................................................................................................................................... 4- 3
4.4.1 Periodic Service .......................................................................................................................................................4- 3
Chapter 5 TROUBLESHOOTING
5.1 Measurement and Adjustment ................................................................................................................... 5- 1
5.1.1 Initial Checkup .........................................................................................................................................................5- 1
5.1.1.1 Initial Check ............................................................................................................................................................................. 5- 1
5.1.2 Test Printing.............................................................................................................................................................5- 1
5.1.2.1 Test Print.................................................................................................................................................................................. 5- 1
5.1.3 Electrical Adjustment ...............................................................................................................................................5- 1
5.1.3.1 Work After Replacing the Laser/Scanner Unit ........................................................................................................................ 5- 1
5.1.3.2 When Replacing the SCNT Board ........................................................................................................................................... 5- 2
5.1.4 Fixing System ..........................................................................................................................................................5- 2
5.1.4.1 Checking the Nip Width of the Lower Fixing Roller.................................................................................................................. 5- 2
5.2 Service Tools.............................................................................................................................................. 5- 2
5.2.1 Standard Tools.........................................................................................................................................................5- 2
5.2.2 Special Tools ...........................................................................................................................................................5- 3
5.2.3 Solvent/Oil List .........................................................................................................................................................5- 3
5.3 Location of Convectors............................................................................................................................... 5- 3
5.3.1 Location of Convectors ............................................................................................................................................5- 3
5.4 Error Code .................................................................................................................................................. 5- 5
5.4.1 Outline......................................................................................................................................................................5- 5
5.4.1.1 Error Code Outline ................................................................................................................................................................... 5- 5
5.4.1.2 Service Error Code .................................................................................................................................................................. 5- 5
5.5 Service Mode ............................................................................................................................................. 5- 6
5.5.1 Outline......................................................................................................................................................................5- 6
5.5.1.1 Hardware Switches .................................................................................................................................................................. 5- 6
5.5.1.2 Service Data Setting ................................................................................................................................................................ 5- 6
5.5.1.3 Service Data Entry Method ...................................................................................................................................................... 5- 7
5.5.2 Service Soft Switch Settings (SSSW) ......................................................................................................................5- 7
5.5.2.1 Outline...................................................................................................................................................................................... 5- 7
Contents
5.5.2.2 SSSW-SW14 ........................................................................................................................................................................... 5- 7
5.5.2.3 SSSW-SW18 ........................................................................................................................................................................... 5- 8
5.5.3 Data Initialization Mode (CLEAR)............................................................................................................................ 5- 8
5.5.3.1 # CLEAR .................................................................................................................................................................................. 5- 8
5.5.4 Test Mode (TEST) ................................................................................................................................................... 5- 8
5.5.4.1 Overview .................................................................................................................................................................................. 5- 8
5.5.4.2 DRAM Test .............................................................................................................................................................................. 5- 8
5.5.4.3 Print Test.................................................................................................................................................................................. 5- 9
5.5.4.4 Modem Test ............................................................................................................................................................................. 5- 9
5.5.4.5 Faculty Test ........................................................................................................................................................................... 5- 11
Chapter 6 APPENDIX
6.1 Outline of Electrical Components ...............................................................................................................6- 1
6.1.1 Cluth/Solenoid ......................................................................................................................................................... 6- 1
6.1.1.1 Cluth/Solenid............................................................................................................................................................................ 6- 1
6.1.2 Motor/Fan ................................................................................................................................................................ 6- 1
6.1.2.1 Motor/Fan................................................................................................................................................................................. 6- 1
6.1.3 Sensor ..................................................................................................................................................................... 6- 2
6.1.3.1 Sensor...................................................................................................................................................................................... 6- 2
6.1.4 Switch ...................................................................................................................................................................... 6- 2
6.1.4.1 Switch/Speaker/Thermistor...................................................................................................................................................... 6- 2
6.1.5 PCBs ....................................................................................................................................................................... 6- 3
6.1.5.1 PCBs........................................................................................................................................................................................ 6- 3
6.1.6 Variable Resistors(VR), LED, and Check Pins by PCB........................................................................................... 6- 3
6.1.6.1 Variable Resistors (VR), Test Pins, Jumpers, and Switches ................................................................................................... 6- 3
Contents
Chapter 1 PRODUCT DESCRIPTION
Contents
Contents
1.1 Product Specifications....................................................................................................................................................1-1
1.1.1 Product Specifications ................................................................................................................................................................. 1-1
1.2 Names of Parts ...............................................................................................................................................................1-3
1.2.1 External View .............................................................................................................................................................................. 1-3
1.2.2 Cross Sectional View ................................................................................................................................................................... 1-4
1.2.3 Major Unit.................................................................................................................................................................................... 1-4
1.2.4 Major Component ........................................................................................................................................................................ 1-5
1.3 Safety .............................................................................................................................................................................1-5
1.3.1 Safety of the Laser Light.............................................................................................................................................................. 1-5
1.3.2 Safety of Toner ............................................................................................................................................................................ 1-5
1.3.3 Safety and Ozone ......................................................................................................................................................................... 1-5
1.3.4 Points to Note When Replacing/Disposing of the Lithium Battery............................................................................................. 1-5
1.3.5 CDRH Ordinances ....................................................................................................................................................................... 1-6
1.4 Functional Configuration ...............................................................................................................................................1-6
1.4.1 Functional Construction............................................................................................................................................................... 1-6
1.5 Basic Sequense...............................................................................................................................................................1-6
1.5.1 Basic Operation Sequence ........................................................................................................................................................... 1-6
1.5.2 Power-on Sequence...................................................................................................................................................................... 1-7
Chapter 1
1.1 Product Specifications
1.1.1 Product Specifications
0012-0205
Body installation method
desktop
Exposure Method
by semiconductor laser (2-beam laser)
Development Method
contact development
Transfer Method
primary transfer: by transfer belt
secondary transfer: by transfer roller
Fixing method
on-demand
Delivery method
face-down/face-up
Toner level detection function
yes
Toner supply type
by toner cartridge (Toner Cartridge 701)
Document type
sheet, 3-D object (2 kg max.), plain paper, heavy paper, recycled paper,
color paper, label sheet, transparency, envelope, postcard
Maximum document size
fixed: 216 mm x 297 mm
ADF: 216 mm x 356 mm
Minimum document size
ADF: 148 mm x 105 mm
ADF capacity
30 sheets or a document height is 8 mm or less
50 sheets(80 g/m2 paper,stack height of 8 mm or less)
Scanning method
CCD reading method
Reproduction ratio
1:1 +/-1.0%; 1:2.000; 1:1.294; 1:0.786; 1:0647; 1:0.500; zoom: 0.500 to
2.000 (in 1% increments)
Reduction for reception
Fixed reduction: 75%, 90%, 95%, 97%
Auto reduction: 70 to 100%
Print area
Printing
Paper types other than envelope: 5 mm and more inside from the paper
edges
Envelope: 10 mm and more inside from the paper edges
Copying
Inside from the following: Leading edge: 5 +/-3 mm, Right edge: 6 to 1
mm, Left edge: 3 +/-3 mm, Trailing edge:3 +/-3 mm (Print area for ADF
reading is not specified.)
Reception output: Inside from the following: Leading edge: 5 +/-3 mm,
Right edge: 6 to 1 mm, Left edge: 3 +/-2 mm, Trailing edge: 12 to 1 mm
Reading resolution
ADF: 600x600 dpi
copyboard glass: 1200x2400 dpi
Copying resolution
ADF: 600 x 600 dpi,
copyboard glass: 600 x 600 dpi
Printing resolution
600 x 600 dpi
Print speed (A4)
if black-and-white, about 19 prints/min;
if color, about 4 prints/min
Print speed(LTR)
if black-and-white, about 20 prints/min
if color, about 4 prints/min
Warm-up Time
130 sec (approx.; at 65% humidity; until Standby screen appears after
power is supplied; varies depending on machine condition and site
condition)
First Copy Time
copyboard glass
B/W: about 22 sec if BW
color: about 46 sec if color
ADF
B/W: about 29 sec if BW
color: about 53 sec if color
Cassette paper size
A4, A5, B5, LEGAL, LETTER, EXE
Multi-purpose paper size
A4, A5, B5, LEGAL, LETTER, EXE, envelope, postcard
Cassette paper type
plain paper (64 to 105 g/m2), heavy paper (106 to 135 g/m2)
Multi-purpose paper type
plain paper (64 to 105 g/m2), heavy paper (106 to 135 g/m2),
transparency, label sheet,postcard
Cassette capacity
plain paper (64, 75, 80 g/m2): about 250 sheets
heavy paper (90, 105 g/m2): about 150 sheets
heavy paper (128g/m2): about 100 sheets
Multi-purpose capacity
15 mm in height (if 64 g/m2 paper, about 125 sheets; if label sheet, 50
sheets; if transparency, 60 sheets if envelope/postcard, 10)
Energy save mode
yes
Operating environment
(Temperature range)
10 to 30 deg C
Operating environment
(Humidity range)
10 to 80% RH
Power supply rating
200-240V 50/60Hz
Power consumption (Maximum) 1100W
Dimensions
w/ tray: 510 mm x 512 mm x 641 mm
w/o tray: 510 mm x 512 mm x 588 mm
Weight
36.0 kg (w/o cartridge)
1-1
Chapter 1
Option
none
Applicable lines
Applicable line analog (1-line)
subscriber line (PSTN)
Handset
none
Transmission method
half-duplex
Transmission control protocol
ITU-T T.30 binary
Modulation method
G3 image signal:
ITU-T V.27ter (4.8k, 2.4k bps),
ITU-T V.29 (9.6k, 7.2k bps),
ITU-T V.17 (14.4k, 12.0k, TC9.6k, TC7.2k bps),
ITU-T V.34 (33.6k, 31.2k, 28.8k, 26.4k, 24.0k, 21.6k, 19.2k, 16.8k,
14.4k, 12.0k, 9.6k, 7.2k, 4.8k, 2.4k bps) /
G3 procedural signal :
ITU-T V.21 (No.2) 300 bps,
ITU-T V.8 300 bps,
ITU-T V.34 1200 bps, 600 bps
Transmission speed
33.6k, 31.2k, 28.8k, 26.4k, 24k, 21.6k, 19.2k, 16.8k, 14.4k, 12k, TC9.6k,
TC7.2k, 9.6k, 7.2k, 4.8k, 2.4k bps,
w/ auto fallback function
Coding method
JBIG, MMR, MR, MH
Error correction method
ITU-T ECM
Transmission output level
about -11 dBm
Reception input level
V.17, V.27ter, V.29: -6 to -43 dBm
V.34: -9 to -43 dBm
Modem
Conexant (FM336 Plus)
Half tone
256-gradation, error diffusion
Dialing
manual dialing: keypad
auto dial (one-touch: 19; coded dial: 100; keypad: 1)
group dial: 119 max.
Broadcast transmission
100 max.
Delayed transmission
no
Subaddress transmission
no
Confidential transmission
no
Relay broadcast originating
transmission
no
Relay broadcast transmission
no
Polling transmission
no
Dual access
Number of jobs reserved for transmission: 20 max.
Number of jobs stored for reception: 20 max.
(when combined, 25 jobs max.)
FAX/TEL switching
yes
Answering machine connection
yes
Remote reception
yes (by remote ID tone from extension)
Confidential reception
no
Polling reception
yes (manual only)
Closed network communication
no
System data backup
Flash ROM:
dial registration data, user data, service data, communication control
report
lithium battery:
clock
Image data backup
backup particulars: memory reception, memory transmission, broadcast
image data
backup IC: 128 MB (SDARAM)
Backup battery: rechargeable capacity
backup length: about 40 min
Activity management
- User Report:
communication control report (every 20 communications),
one-touch dial list,
abbreviation dial list, group dial list,
user data list,
transmission result report,
reception result report
- Service Report
system data list,
system dump list
Others
1-2
summer time function: yes
telephone directory function: yes
forced memory reception: no
2-on-1 reception: no
LCD display: yes (20 characters x 2 lines)
DONE stamp: no
Chapter 1
1.2 Names of Parts
1.2.1 External View
0007-4608
[2]
[9]
[3]
[10]
[4]
[1]
[5]
[6]
[7]
[8]
[11]
F-1-1
[1]
Operation panel
[7]
Front cover
[2]
ADF (Auto Document Feeder)
[8]
Cassette
[3]
Document feeder tray
[9]
Platen glass cover
[4]
Document guides
[10]
Platen glass
[5]
Output tray
[11]
Multi-purpose tray
[6]
Cartridge cover
[17]
[12]
[13]
LINE
EXT.
[14]
[15][16]
F-1-2
[12]
USB port
[15]
Telephone line jack
[13]
Power socket
[16]
External device jack
[14]
Face up cover
[17]
Ethernet port
1-3
Chapter 1
1.2.2 Cross Sectional View
0007-4617
[23]
[1]
[25]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[24]
[22]
[21] [20] [19] [18] [17][16][15] [14]
F-1-3
[1]
Laser/scanner unit
[14]
[2]
Developing cylinder
[15]
Registration roller unit
Secondary transfer roller
[3]
Photosensitive drum
[16]
Auxiliary ITB cleaning roller
[4]
Primary charging roller
[17]
Feed belt
[5]
Drum cartridge
[18]
Developing rotary
[6]
ITB
[19]
Toner cartridge
[7]
Density sensor
[20]
Fixing film unit
[8]
Primary transfer roller
[21]
Pressure roller
[9]
ITB cleaning roller
[22]
Fixing delivery roller
[10]
Registration shutter
[23]
Facedown delivery roller
[11]
Pick-up roller
[24]
Cassette feeding roller
[12]
Multi-purpose tray
[25]
CCD unit
[13]
Separation pad
1.2.3 Major Unit
0007-4618
[1]
[7]
[2]
[3]
[4]
[6]
[5]
F-1-4
1-4
[1]
CCD unit
[5]
Registration roller assembly
[2]
Laser/scanner unit
[6]
Rotary drive assembly
[8]
Chapter 1
[3]
Main drive assembly
[7]
Developing rotary assembly
[4]
Registration shutter assembly
[8]
Fixing assembly
1.2.4 Major Component
0007-4619
[1]
[2]
[8]
[7]
[6]
[3]
[9]
[12]
[4]
[10]
[11]
[13]
[5]
F-1-5
[1]
Toner cartridge memory tag contact
[8]
[2]
Machine inside temperature thermistor
[9]
Thermal fuse
Main thermistor
[3]
Multifeeder pickup roller
[10]
Sub thermistor
[4]
Separation pad
[11]
Fixing film assembly
[5]
Registration roller
[12]
Pressure roller
[6]
Secondary toner roller
[13]
Cassette pickup roller
[7]
Drum cartridge memory tag contact
1.3 Safety
1.3.1 Safety of the Laser Light
0007-4966
Laser light can prove to be hazardous to the human body. The machine's laser unit is fully enclosed in a protective housing and external covers so that its light will
not escape outside as long as the machine is used normally.
F-1-6
1.3.2 Safety of Toner
The machine's toner is a non-toxic material composed of plastic, iron, and small amounts of dye.
0007-4969
Do not put the toner into fire. It may explode.
Toner on the Skin or Clothes
1. If your skin or clothes came into contact with toner, use dry tissue to remove the toner, and then wash with water.
2. Do not use warm or hot water, which will cause the toner to jell, permanently fusing it with the fibers of the clothes.
3. Do not bring toner into contact with vinyl material. They are likely to react with each other.
1.3.3 Safety and Ozone
0007-4970
The cleaning charge roller used in the machine generates ozone gas (O3) at time of corona discharge (only when the machine is in operation).
A set of rules exists under Underwriters' Laboratories (UL) standards for levels of ozone gas permitted, and the machine has been certified to comply with the rules
at time of shipment from the factory.
1.3.4 Points to Note When Replacing/Disposing of the Lithium Battery
0011-0506
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
1-5
Chapter 1
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
1.3.5 CDRH Ordinances
0011-0549
The Center for Devices and Radiological Health (CDRH) of the US Food and Drum Administration put into force ordinances related to laser products on August
2, 1976. These ordinances apply to laser products manufactured on and after August 1, 1976, and sale of laser products is prohibited within the US unless they bear
a certificate of compliance. The following is the label that indicates compliance with the CDRH ordinances, and it must be found on all laser products sold in the US.
F-1-7
The description may vary from model to model.
1.4 Functional Configuration
1.4.1 Functional Construction
0007-4972
The machine may be divided into the following 6 functional blocks: system control block, reader control block, printer control block, laser/scanner block, image
formation block, pickup/feeder block.
The following is a diagram showing these blocks:
Eeposure control system
System control
system
Laser exposure system
Image formation system
Print control
system
fixing system
Pickup / feed system
F-1-8
1.5 Basic Sequense
1.5.1 Basic Operation Sequence
0008-1692
The operation sequences for the printer are controlled by the CPU in the DCNTboard in the engine control system. The table below indicates the purposes and
engine operations of each period from when the power is turned on until a print operation is completed and each motor stops rotating. See the appendix for the
timing chart.
T-1-1
Period
1-6
Purpose
WAIT
(Wait)
From the power switch is
To clear a potential on the
turned on until ITB cleaning drum surface and clean the
is completed.
ITB.
STBY
(Standby)
From the end of the WAIT To keep the printer ready to
or LSTR period until a print print.
command is input from the
interface controller or the
power switch is turned off.
INTR
(Initial
rotation)
After the input of a print
To stabilize sensitivity of the
command from the interface photosensitive drum in
controller until the ITB
preparation for printing.
HOME POSITION
DETECTION (HP1) signal
for the first color is detected.
Remarks
In this period, the printer executes
residual paper detection, toner level
detection, image density calibration
control, etc.
Chapter 1
PRINT
(Print)
From the end of the INTR
period until the ITB home
position for the secondary
transfer is detected.
To form an image on the
photosensitive drum based on
the VIDEO signal input from
the interface controller and
transfer a toner image to the
ITB.
LSTR
(Last
rotation)
From the end of a print
operation until the main
motor stops its rotation.
Instant a print command is input
To transfer secondarily a
toner image on the ITB to a from the interface controller; the
initial rotation starts.
paper and then delivers
outpaper with toner fixed on.
1.5.2 Power-on Sequence
The power-on sequence is the first operation executed by loads based on the firmware previously stored in the printer. It is indicated in the flowchart below.
The power-on sequence is executed from when the power is turned on until the printer enters the standby status.
0008-1693
Power on
CPU initialization
ASIC initialization
Fan on
Video interface communication ready
Video interface communication start
Printer ID check
Motor initial drive
* Main motor
* Toner cartridge motor
* Developing rotary motor
* Fixing motor
* Engaging motor
drive
Memory tag (for toner cartridges,
drum
cartridge) communication start
Residual
paper/door open
check period
EP-87 toner cartridge
presence/life check
Failure
check period
EP-87 drum cartridge
presence/life check
Scanner motor initial drive
Scanner motor initial drive check
Maximum image density control (D-max)
Halftone calibration detection control (D-half)
Image stabilization
calibration control
Standby
F-1-9
1-7
Chapter 2 TECHNICAL REFERENCE
Contents
Contents
2.1 Document Feed and Exposure System...........................................................................................................................2-1
2.1.1 Overview/Configuration .............................................................................................................................................................. 2-1
2.1.1.1 Overview .........................................................................................................................................................................................................2-1
2.1.1.2 Major Components..........................................................................................................................................................................................2-1
2.1.2 Basic Sequence ............................................................................................................................................................................ 2-2
2.1.2.1 Basic Sequence of Operation at Power-on......................................................................................................................................................2-2
2.1.2.2 Basic Sequence of Operation in Response to a Press on the Start Key (book)...............................................................................................2-3
2.2 Laser Exposure...............................................................................................................................................................2-4
2.2.1 Overview/Configuration .............................................................................................................................................................. 2-4
2.2.1.1 Outline.............................................................................................................................................................................................................2-4
2.2.2 Controlling the Laser ................................................................................................................................................................... 2-5
2.2.2.1 Outline.............................................................................................................................................................................................................2-5
2.2.2.2 Laser Emission Control...................................................................................................................................................................................2-6
2.2.2.3 Automatic Power Control (APC) ....................................................................................................................................................................2-6
2.2.2.4 Horizontal Synchronous Control.....................................................................................................................................................................2-6
2.2.2.5 Image Mask Control........................................................................................................................................................................................2-6
2.2.2.6 Laser Failure Detection ...................................................................................................................................................................................2-6
2.2.3 Controlling the Laser Scanner Motor .......................................................................................................................................... 2-7
2.2.3.1 Outline.............................................................................................................................................................................................................2-7
2.2.3.2 Scanner Motor Speed Control.........................................................................................................................................................................2-7
2.2.3.3 Scanner Motor Failure Detection ....................................................................................................................................................................2-7
2.3 Image Formation ............................................................................................................................................................2-7
2.3.1 Overview/Configuration .............................................................................................................................................................. 2-7
2.3.1.1 Outline.............................................................................................................................................................................................................2-7
2.3.1.2 Image Formation Process................................................................................................................................................................................2-8
2.3.1.3 Electrostatic Latent Image Formation Block ..................................................................................................................................................2-9
2.3.1.4 Developing Block............................................................................................................................................................................................2-9
2.3.1.5 Transfer Block...............................................................................................................................................................................................2-10
2.3.1.6 Fixing Block..................................................................................................................................................................................................2-11
2.3.1.7 ITB Cleaning Block ......................................................................................................................................................................................2-12
2.3.2 Driving and Controlling the High-Voltage System ................................................................................................................... 2-14
2.3.2.1 Outline...........................................................................................................................................................................................................2-14
2.3.2.2 Primary Charging Bias Generation ...............................................................................................................................................................2-14
2.3.2.3 Developing Bias Generation .........................................................................................................................................................................2-14
2.3.2.4 Primary Transfer Bias Generation ................................................................................................................................................................2-14
2.3.2.5 Secondary Transfer Bias Generation ............................................................................................................................................................2-15
2.3.2.6 Auxiliary ITB Cleaning Bias Generation......................................................................................................................................................2-15
2.3.2.7 ITB Cleaning Bias Generation ......................................................................................................................................................................2-15
2.3.2.8 Fixing Bias Generation .................................................................................................................................................................................2-15
2.3.3 Image Stabilizaton Control ........................................................................................................................................................ 2-15
2.3.3.1 Outline...........................................................................................................................................................................................................2-15
2.3.3.2 Image Density Calibration (D-max) Control ................................................................................................................................................2-16
2.3.3.3 Image Halftone Calibration (D-half) Control ...............................................................................................................................................2-16
2.3.4 Developing Rotary ..................................................................................................................................................................... 2-16
2.3.4.1 Outline...........................................................................................................................................................................................................2-16
2.3.4.2 Developing Rotary Rotation Control ............................................................................................................................................................2-16
2.3.4.3 Developing Rotary Engaging Control...........................................................................................................................................................2-17
2.3.4.4 Developing Rotary Position Detection..........................................................................................................................................................2-18
2.3.5 Toner Cartridge .......................................................................................................................................................................... 2-19
2.3.5.1 Outline...........................................................................................................................................................................................................2-19
2.3.5.2 Memory Tag..................................................................................................................................................................................................2-19
2.3.5.3 Memory Tag Contact Engaging Control.......................................................................................................................................................2-19
2.3.5.4 Cartridge Presence Detection ........................................................................................................................................................................2-20
2.3.5.5 Toner Cartridge Life Detection .....................................................................................................................................................................2-20
Contents
2.3.6 Drum Cartridge .......................................................................................................................................................................... 2-21
2.3.6.1 Outline .......................................................................................................................................................................................................... 2-21
2.3.6.2 Cleaning Roller Engaging Control ............................................................................................................................................................... 2-22
2.3.6.3 Memory Tag ................................................................................................................................................................................................. 2-23
2.3.6.4 Detecting the ITB Home Position................................................................................................................................................................. 2-24
2.3.6.5 Drum Cartridge Presence Detection ............................................................................................................................................................. 2-25
2.3.6.6 Checking the Life of the Drum Cartridge ..................................................................................................................................................... 2-26
2.3.7 Secondary Transfer Mechanism ................................................................................................................................................ 2-27
2.3.7.1 Outline .......................................................................................................................................................................................................... 2-27
2.3.7.2 Secondary Transfer Roller Engaging Control .............................................................................................................................................. 2-28
2.3.7.3 Secondary Roller Position Detection ............................................................................................................................................................ 2-29
2.4 Pickup and Feed System.............................................................................................................................................. 2-30
2.4.1 Overview/Configuration ............................................................................................................................................................ 2-30
2.4.1.1 Overview....................................................................................................................................................................................................... 2-30
2.4.1.2 Pickup/Feeding Assembly ............................................................................................................................................................................ 2-31
2.4.2 Other Control ............................................................................................................................................................................. 2-32
2.4.2.1 Skew Correction Function ............................................................................................................................................................................ 2-32
2.4.2.2 Feed Speed Control....................................................................................................................................................................................... 2-32
2.4.2.3 Detecting the Machine Inside Temperature.................................................................................................................................................. 2-32
2.4.3 Detection Jams ........................................................................................................................................................................... 2-33
2.4.3.1 Jam Detection Outline .................................................................................................................................................................................. 2-33
2.4.3.1.1 Outline .................................................................................................................................................................................................. 2-33
2.4.3.2 Delay Jams .................................................................................................................................................................................................... 2-33
2.4.3.2.1 Pickup Delay Jam ................................................................................................................................................................................. 2-33
2.4.3.2.2 Delivery Delay Jam............................................................................................................................................................................... 2-33
2.4.3.3 Stationary Jams ............................................................................................................................................................................................. 2-33
2.4.3.3.1 Pick-up Stationary Jam ......................................................................................................................................................................... 2-33
2.4.3.3.2 Delivery Stationary Jam........................................................................................................................................................................ 2-33
2.4.3.4 Other Jams .................................................................................................................................................................................................... 2-33
2.4.3.4.1 Fixing Unit Wrapping Jam ................................................................................................................................................................... 2-33
2.4.3.4.2 Door Open Jam ..................................................................................................................................................................................... 2-33
2.4.3.4.3 Residual Paper Jam ............................................................................................................................................................................... 2-33
2.4.4 Cassette Pickup Unit .................................................................................................................................................................. 2-34
2.4.4.1 Pickup from the Cassette .............................................................................................................................................................................. 2-34
2.4.5 Manual Feed Pickup Unit .......................................................................................................................................................... 2-34
2.4.5.1 Multi-purpose Tray Pick-up.......................................................................................................................................................................... 2-34
2.5 Fixing Unit .................................................................................................................................................................. 2-34
2.5.1 Overview/Configuration ............................................................................................................................................................ 2-34
2.5.1.1 Outline .......................................................................................................................................................................................................... 2-34
2.5.2 Various Control Mechanisms .................................................................................................................................................... 2-35
2.5.2.1 Controlling the Temperature of the Fixing Unit ........................................................................................................................................... 2-35
2.5.2.1.1 Heater Temperature Control ................................................................................................................................................................. 2-35
2.5.3 Protection Function.................................................................................................................................................................... 2-35
2.5.3.1 Flicker prevention function........................................................................................................................................................................... 2-35
2.5.3.2 Protective Function ....................................................................................................................................................................................... 2-35
2.5.3.3 Fixing Unit Failure Detection ....................................................................................................................................................................... 2-36
2.6 Engine Control System................................................................................................................................................ 2-36
2.6.1 Construction............................................................................................................................................................................... 2-36
2.6.1.1 Overview....................................................................................................................................................................................................... 2-36
2.6.2 DC Controller (DCNT) .............................................................................................................................................................. 2-37
2.6.2.1 Outline .......................................................................................................................................................................................................... 2-37
2.6.2.2 Operations ..................................................................................................................................................................................................... 2-37
2.6.2.3 Controlling the Motors and Fans .................................................................................................................................................................. 2-38
2.6.2.4 Main Motor Control...................................................................................................................................................................................... 2-38
2.6.2.5 Developing Rotary Motor Control................................................................................................................................................................ 2-39
2.6.2.6 Cooling Fan................................................................................................................................................................................................... 2-40
2.6.3 System Controller (SCNT) ........................................................................................................................................................ 2-41
2.6.3.1 Outline .......................................................................................................................................................................................................... 2-41
2.6.3.2 Canon Advanced Printing Technology (CARPS) ..................................................................................................................................... 2-41
Chapter 2
2.1 Document Feed and Exposure System
2.1.1 Overview/Configuration
2.1.1.1 Overview
The following are the major specifications, control mechanisms, and functions associated with the original feed/exposure system:
0008-1957
T-2-1
Item
Function/method
Scanning lamp
cathode ray tube
Original scanning
in book mode: scanning by moving the CCD unit
in ADF mode: scanning by moving the original
Reading resolution
1200(main scanning) x 2400 (sub scanning) dpi
(ADF:600 x 600dpi)
Scanner position detection by home position sensor
Reproduction ratio (zoom) in copyboard mode: 100%
in ADF mode: 100%
(main scanning) image processing by SCNT board
(sub scanning): image processing by SCNT board
CCD unit drive control
by flat bed motor
Scanning lamp
activation control by inverter circuit
2.1.1.2 Major Components
0008-1829
The Document feed / Exposure system consists of the following major components:
[3]
[2]
[1]
[4]
[9]
[8]
[5]
[6]
[7]
F-2-1
T-2-2
[1] Slide guide
[6] Reading glass
[2] Document pick-up roller
[7] CCD unit
[3] Document separation roller
[8] Document delivery roller
[4] Separation guide
[9] Document output tray
[5] Document feed roller
2-1
Chapter 2
[1]
[2]
[3]
F-2-2
T-2-3
[1] Document feed motor
[3] CCD unit
[2] Flatbed motor
Reading from the ADF
To avoid skew feeding, documents loaded on the document tray are retained in the horizontal direction by the slide guide. Then, the documents are fed to the separation roller by the pickup roller, and separated one sheet each using differences in the coefficient of friction among the separation roller, documents, and separation
guide.
After that, the feeder roller feeds the document onto the reading glass, and the CCD unit reads out image data of the document; then, the delivery roller delivers it
to the output tray.
The document feed motor drives the various rollers of the ADF.
Reading from the platen glass
The CCD unit driven by the flatbed motor reads out image data of a document on the platen glass.
2.1.2 Basic Sequence
2.1.2.1 Basic Sequence of Operation at Power-on
0008-2930
Basic Sequence of Operation at Power-On
main/sub scanning read position adjustment
black shading correction*1
STBY
lamp warm-up*2
gain correction*3
SREADY
reader motor
scanning lamp
HP sensor
HP
HP
HP
HP
:motor forward
:motor reverse
:scanning lamp ON
:HP sensor ON
F-2-3
2-2
Chapter 2
shading position
HP
1. black shading*1
2. scanning lamp ON
3. scanning lamp
warm-up*2
4. gain correction*3
5. main/sub scanning
position adjustment
F-2-4
*1: black shading correction (the dark output analog level is adjusted so that the image density digital level is '0').
*2: scanning lamp warm-up (lasts until the temperature of the scanning lamp stabilizes).
*3: gain correction (standardizes the rate of amplification of the analog video signals generated by the CCD; main/sub scanning point adjustment)
2.1.2.2 Basic Sequence of Operation in Response to a Press on the Start Key (book)
0008-2931
Basic Sequence of Operation in Response to a Press on the Start Key(BOOK)
gain correction*1
Start key
ON
shift shading*2
STBY
SREADY
reader motor
scanning lamp
HP sensor
HP
HP
:motor forward
:motor reverse
:scanning lamp ON
:HP sensor ON
F-2-5
2-3
Chapter 2
shading position
Book
read start position
Position *1
HP
read end position
1. gain correction*1
2. shift shading*2
3. original scan
*The term "book position" refers to the position at which the
motor is accelerated to prepare for reading.
F-2-6
2.2 Laser Exposure
2.2.1 Overview/Configuration
2.2.1.1 Outline
0007-4973
The laser/scanner system forms a latent image on the photosensitive drum according to the VIDEO signals sent from the SCNT Board. This system consists of the
laser driver circuit, scanner motor, etc. They are integrated into the laser/scanner unit and controlled by the DCNT Board.
The laser scanner unit is illustrated in the figure below and the sequence is described in the following.
SCNT BOARD
SCANNER MOTOR
CONTROL signal
VIDEO signals
DCNT BOARD
LASER CONTROL signal
VIDEO signals
Four-sided mirror
Focus lenses
Reflective
mirror
Scanner
motor
Cylindrical lens
BD circuit
Laser driver
F-2-7
The laser/scanner unit adopted a "twin beam method" (Note) which scans two lines simultaneously with two laser diodes for high-speed laser scanning with the
motor revs restrained. The operation sequence of the laser/scanner unit is discussed in the following:
1) The DCNT Board rotates the four-sided mirror when a print command is sent from the SCNT Board, and then rotates the scanner motor.
2) When the scanner motor starts to rotate, the DCNT Board emits light from the laser forcefully with the LASER CONTROL signal and then starts to control the
rotation of the scanner motor.
3) The DCNT Board rotates the motor at a specified speed with the SCANNER MOTOR SPEED CONTROL signal.
4) The DCNT Board sends the VIDEO signals to the laser driver circuit after the rotational speed of the motor reaches its target value.
5) The laser driver PCB emits light from the two laser diodes according to these signals.
6) The two laser beams strike the four-sided mirror rotating at a specified speed through the collimator lens and cylindrical lens.
7) The laser beams reflected off the four-sided mirror focus on the photosensitive drum through the focus lens and reflective mirror located in front of the four-sided
mirror.
2-4
Chapter 2
8) When the four-sided mirror rotates at a constant speed, the laser beam striking the photosensitive drum scans on the drum at a constant speed.
9) When the photosensitive drum rotates and the laser beam scans on the photosensitive drum, at each specified speed, a latent image is formed on the drum.
Twin beam method
Two laser diodes (LD1, LD2) are built into the laser unit. In one scanning operation, the laser unit emits light from the LD1 and LD2 and writes two lines simultaneously. This enables a two-fold printing at the same print speed.
First scan
Second scan
Third scan
Fourth scan
LD1 scan line
LD2 scan line
Feed direction
Image areas
F-2-8
2.2.2 Controlling the Laser
2.2.2.1 Outline
This control is utilized to turn on/off the two laser diodes (LD1, LD2) based on the LASER CONTROL signal sent from the DCNT Board.
The circuit diagram of the laser control is illustrated below.
0008-1541
Laser driver circuit
DCNT Board
LD1 PD LD2
IC101
CPU +5V
J102
-13
J11
-1
-2
-4
VDO1
/VDO1
-12
-10
-8
-10
VDO2
/VDO2
-6
-4
VCC
LD1
switching
circuit
LD2
switching
circuit
Comparator
Comparator
Standard voltage
IC102
ASIC
-11
PDOUT
-3
C16
-5
-6
-7
-9
-8
-7
CNT0
CNT1
CNT2
-3/9/12
C18
Logic circuit
-2/5/11
J116-2 /BDI
Sample
hold circuit
Sample
hold circuit
GND
Laser driver IC
J31-2
BD circuit
F-2-9
The DCNT Board sends the VIDEO (VDO1, /VDO1, VDO2, /VDO2) signals for image formation and the LASER CONTROL (CNT0, CNT1, CNT2) signals for
changing the operation mode of the laser, to the logic circuit in the laser driver IC. The laser driver performs the laser control responsive to a combination of the
CNT0, CNT1, CNT2 signals.
T-2-4
Operation mode
CNT0
CNT1
CNT2
Standby mode
L
L
L
Laser control off status
Details
Print mode
H
H
H
Laser emission is executable according to the
VIDEO signals.
LD1 force on mode
L
H
L
Turns on the LD1 forcefully
LD2 force on mode
H
L
L
Turns on LD2 forcefully
LD force off mode
H
H
L
Turns off the LD1 and LD2 forcefully
The following four controls are performed with the LASER CONTROL signals:
1) Laser emission control
2-5
Chapter 2
2) Automatic power control (APC)
3) Horizontal synchronization control
4) Image mask control
2.2.2.2 Laser Emission Control
0008-1542
In this control, the laser diodes (LD1, LD2) are turned on/off based on the VIDEO signals.
When the laser drive IC goes into print mode, the laser driver PCB turns on the laser diodes with a specified amount of light or turns it off according to the VIDEO
(VDO1, /VDO1, VDO2, /VDO2) signals sent from the SCNT Board.
2.2.2.3 Automatic Power Control (APC)
0008-1543
This control is utilized to maintain amount of light emitted from the laser diodes at a specified amount.
There are two kinds of the APC, initial APC (Note: 1) and between-lines APC (Note: 2). They perform in the same way. The control procedures are described below.
1) When the laser driver IC goes in to LD1 force on mode, the laser driver circuit emits light from the LD1 forcefully.
2) The light amount of the laser diode is detected by the photo diode (PD). Then it is converted to voltage level and compared with the reference voltage (voltage
level equivalent to a target laser light amount) in the comparator.
3) The laser driver circuit controls the laser current until the voltage level of the LD1 laser light amount reaches the standard voltage.
4) Then, when the laser driver IC goes into LD force off mode, the LD1 is turned off forcefully. The laser driver circuit stores the adjusted laser light amount in the
C16.
5) After the light amount adjustment of the LD1, the laser driver IC goes into LD2 force on mode and the laser driver circuit emits light from the LD2 forcefully.
The laser light amount of the LD2 is adjusted in the same way the LD1 is done. The laser driver circuit stores the adjusted laser light amount of the LD2 in the
C18.
Note 1. The APC performed at scanner motor start-up. It adjusts the laser light amount and detects a laser failure.
Note 2. The APC performed during the print period. It performs the laser light amount adjustment for one line before the first line starts to be written.
2.2.2.4 Horizontal Synchronous Control
0008-1544
This control is utilized to determine a starting position in the image horizontal direction.
The control procedures are described below.
1) The DCNT Board outputs the LASER CONTROL signals in a combination of which the laser drive IC goes into LD1 force-on mode or LD2 force-on mode
during the unblanking period (Note) and emits light from the laser diodes (LD1, LD2) forcefully.
2) Each laser beam is sent to the BD PCB located on the scanning path of laser beams.
3) The BD circuit detects these laser beams and generates the BD INPUT (/BDI) signal. The signal is sent to the DCNT Board.
4) The DCNT Board generates the HORIZONTAL SYNCHRONOUS (/BDO) signal based on the/BDI signal and sends the /BDO signal to the SCNT Board.
5) The SCNT Board, after inputting the /BDO signal, outputs the VIDEO (VDI1, /VDI1,VDI2, /VDI2) signals to the DCNT Board so that the starting position in
the image horizontal direction is determined.
The unblanking period is a period while light is emitted from the laser diodes in non-image areas.
2.2.2.5 Image Mask Control
0008-1545
/BD
T2
T1
2 mm
T3
2mm
LEFT/RIGHT
MARGIN
MASKING signal
/TOP
TOP/BOTTOM
MARGIN
20ms MASKING signal
This control is utilized to avoid laser beam emission on the non-image areas during periods other than the unblanking period.
The DCNT Board let the laser driver IC go into LD force off mode to turn off the laser diodes (LD1, LD2) forcefully while the laser beam scans on non-image areas
during periods other than the unblanking period. This status is called an image mask status, which the laser diodes (LD1, LD2) do not emit light even though the
VIDEO (VDI1, /VDI1, VDI2, /VDI2) signals are input during this period. Control timing for the image masking is determined based on paper size information sent
from the SCNT Board.
If the length of paper measured with the registration sensor (PS711) is longer than paper size information, the DCNT Board puts the image masking forcefully to
avoid soiling the secondary transfer roller.
2 mm
2 mm
F-2-10
1. The shaded areas indicate areas in which an image can be written by the laser beams.
2. Times T1 to T3 vary according to a paper size.
3. When the multi-purpose tray is selected as a pick-up source, the paper width cannot be determined if a paper size specification command is not sent from the
SCNT Board. In this case, values of T1 to T3 are set to be that of universal size.
2.2.2.6 Laser Failure Detection
0008-1546
The DCNT Board detects a condition of the control in order for the laser control to be performed properly.
If the laser current monitor signal (PDOUT) cannot be detected when the scanner motor is started up or when APC is under way, the DCNT Board will assume the
condition to indicate a fault in the scanner block and stop the printer engine; at the same time, it will communicate the fact to the SCNT Board.
2-6
Chapter 2
2.2.3 Controlling the Laser Scanner Motor
2.2.3.1 Outline
The control is utilized to rotate the scanner motor in order to strike laser beams to a proper position on the photosensitive drum.
The circuit diagram of the scanner motor control is illustrated below.
0008-2075
Laser/scanner unit
DCNT Board
/BDI J116-2
J31-2
BD circuit
IC101
CPU
+24VB
+24VB
Frequency
comparator
Scanner motor
J103-1
J21-4
/ACC 129 /ACC
-2
-3
/DEC 130 /DEC
-3
-2
-4
-1
Standard
clock
Scanner driver IC
Integrator
circuit
Drive
circuit
24
Frequency
divider
X101
M
25
IC102
ASIC
F-2-11
2.2.3.2 Scanner Motor Speed Control
0008-2009
This control is utilized to rotate the scanner motor at a constant speed by the DCNT Board controlling the scanner motor drive IC.
The scanner motor, which is integral with the scanner motor drive circuit, is a 3-phase, 12- pole DC brushless motor with a built-in Hall device.
The operations of the scanner motor control are described in the following.
After receiving a print command, the CPU in the DCNT Board sets the SCANNER MOTOR ACCELERATION (/ACC) signal "L" through the ASIC and then the
scanner motor starts to rotate.
The /BDI signal is sent from the BD circuit as the CPU emits light from the laser forcefully during scanner motor rotation. The ASIC compares a period of the /
BDI signal with the reference clock in the frequency comparator. Then it controls the scanner motor revs by controlling the /ACC signal and /DEC signal until the
revs reach a specified value.
2.2.3.3 Scanner Motor Failure Detection
0008-1549
The DCNT Board determines whether the scanner motor rotates at specified revs by monitoring the /BDI signal sent from the BD circuit.
The DCNT Board determines a optical unit failure or BD error, stops the printer engine, and notifies the failure to the SCNT Board, under the following conditions:
1) Optical unit failure
If the detected period of the /BDI signal does not satisfy a specified range within 20 seconds at scanner motor start-up, or if the /BDI signal cannot be detected for
0.5 second after the detected period of the signal has satisfied a specified range, the DC controller determines a optical unit failure.
2) BD error
If the input period of the /BDI signal is not within the range of +/-1.7% of the scanner motors specified revs during a print operation after the motor has reached
its specified revs, the DC controller determines a BD error.
2.3 Image Formation
2.3.1 Overview/Configuration
2.3.1.1 Outline
0007-4976
The image formation system, which serves as the nerve center of the printer, forms a toner image on paper.
It consists of a developing cylinder, four toner cartridges containing toner, a drum cartridge containing the ITB, photosensitive drum, etc., a developing rotary storing the toner cartridges, and a fixing unit, etc. These parts are controlled by the DCNT board.
After receiving a print command from the interface controller, the DCNT board the developing rotary, laser/scanner unit, high-voltage power supply circuit to form
an image based on the VIDEO signals on paper.
The toner cartridges and drum cartridge come with built-in memory tags that store cartridge usage condition information, etc. The DCNT board performs reading
and writing.
2-7
Chapter 2
ITB
Primary charging roller
Toner cartridge
Memory tag
VDO
Developing
cylinder
Memory tag
Blade
Primary transfer
roller
Photo
sensitive
drum
Developing
rotary
Image cartridge
Fixing unit
Secondary transfer
roller
SUBH.V.T
ITB
Auxiliary
cleaning ITB cleaning
roller
roller
H.V.T
DCNT board
VIDEO
signal
Print command
SCNT board
F-2-12
2.3.1.2 Image Formation Process
An image formation process is the basic procedures of operations for image formation.
The process can be divided into 5 blocks and 12 steps. By performing steps in each block, a toner image is formed on paper.
The following are the blocks and steps of the image formation process.
1. Electrostatic latent image formation block
2. Laser beam exposure
1. Primary charging
Photosensitive
drum
2. Developing
3. Auxiliary development
block
12. Drum cleaning
ITB
4. Development
Delivery
5. ITB cleaning block
5. Primary transfer
11. ITB cleaning
10. ITB cleaning roller charging
9. Auxiliary ITB cleaning roller charging
8. Fixing
4. Fixing block
6. Secondary transfer
7. Separation
Registration
3. Transfer block
Paper path
Directions of rotation
F-2-13
1) Electrostatic latent image formation block
Forms an electrostatic latent image on the photosensitive drum.
Step 1: Primary charging - A uniform negative charge is applied onto the surface of the drum.
Step 2: Laser beam exposure - An electrostatic latent image is formed on the drum.
2) Developing block
Turns an electrostatic latent image on the drum to a visible image by applying the toner onto it.
Step 3: Auxiliary development
Step 4: Development
3) Transfer block
Transfers a toner image on the drum on paper.
Step 5: Primary transfer - Toner on the drum is transferred to the ITB.
Step 6: Secondary transfer - Toner on the ITB is transferred to paper.
Step 7: Separation - Paper separates from the ITB.
4) Fixing block
Fuses a toner image onto paper.
Step 8: Fixing
2-8
Multi-purpose tray pick-up
0007-4977
Chapter 2
5) ITB cleaning block
Cleans residual toner on the photosensitive drum and ITB.
Step 9: Auxiliary ITB cleaning roller charging - Residual toner on the ITB is charged in order to be held on the ITB.
Step 10: ITB cleaning roller charging - Residual toner on the ITB is charged.
Step 11: ITB cleaning - Residual toner on the ITB is transferred onto the drum.
Step 12: Drum cleaning - Residual toner adhered to the drum is cleaned.
2.3.1.3 Electrostatic Latent Image Formation Block
0007-4978
This block comprises three steps, which forms an electrostatic latent image on the photosensitive drum.
After the completion of the last step in this block, negative charges remain in areas on the drum surface exposed to laser beams. Negative charges are removed from
areas exposed to the laser beams.
An image with negative charges on the drum is called an "electrostatic latent image" since it is invisible to the eye.
Time (t)
0
Surface potential (V)
-100
Exposed
areas
-500
Unexposed
areas
Primary
charging
(step 1)
Laser beam
exposure
(step 2)
Primary
transfer
(step 5)
Primary
charging
(step 1)
F-2-14
Step 1: Primary charging
A uniform negative potential is applied to the drum surface in preparation for latent image formation, in this step.
The primary charging roller is made with conductive rubber. A DC bias is applied to the primary charging roller to keep the potential on the drum surface uniformly.
Primary charging roller
Photosensitive
drum
AC bias
DC bias
F-2-15
Step 2: Laser beam exposure
An electrostatic latent image is formed on the photosensitive drum in this step.
When the laser beams scan a negatively charged drum surface, it causes the charges in areas struck by the laser beams to be neutralized. An electrostatic latent
image is formed in areas on the drum where the negative charges are eliminated.
Laser beam
Unexposed
areas
Exposed
areas
F-2-16
2.3.1.4 Developing Block
0007-4979
This block is comprised of two steps (see Step 3 and Step 4). In this block, the image becomes visible by utilizing a developing method called contact development
method, where the toner is transferred onto the electrostatic latent image on the drum surface. In this method, developing cylinder adheres closely to the photosensitive drum to push up the toner.
Toner (development agent) used in this printer is non-magnetic single-component toner, composed of resins, etc.
2-9
Chapter 2
Blade
Photosensitive
drum
Stirrer
DC bias
Developing
cylinder
DC bias
F-2-17
Step 3: Auxiliary development
In this step, CPU applies DC bias onto the toner that was not charged by frictional electrification. Here, the toner becomes uniformed negative potential. The printer
charges the uncharged toner by applying DC bias onto the blade inside the toner cartridge.
The DC bias is also used as developing bias.
Step 4: Development
The toner is adhered onto an electrostatic latent image on the photosensitive drum in this step.
The toner is insulators, and acquires a negative charge by friction due to the rotating cylinder and the blade.
When the negatively charged toner makes contact with the drum, exposed areas on the drum are more positively charged than that on the cylinder. Then the toner
charged about the same as the cylinder adheres onto the exposed areas on the drum. The latent image on the drum becomes visible.
Although the charges on the exposed area on the drum are shown as positive in follow, in actuality, they are negative. However, they are more positive than the
charges on the cylinder.
+V
Potential (V)
Drum surface potential (exposed areas)
0
Toner potential
-V
Developing cylinder surface potential
Time (t)
Drum surface potential (unexposed areas)
F-2-18
2.3.1.5 Transfer Block
This block comprises three steps, which transfers the toner image on the drum surface onto paper.
0007-4980
Step 5: Primary transfer
The toner on the drum is transferred onto the ITB in this step.
A DC positive bias is applied to the primary transfer roller opposite to the drum in order to charge the ITB positively. Then the negatively charged toner on the
drum is transferred onto the positively charged ITB. This procedure is repeated for each color (Y, M, C, Bk).
In full-color printing, as toners in four colors are piled up on the ITB, the holding force of the toner weakens as the transfer process progresses for the 1st color, 2nd
color... Therefore, after transferring the first color, the DC positive bias is increased for each color in order to supplement the holding force of the toner.
2-10
Chapter 2
ITB
Toner
Photosensitive
drum
DC bias
Primary
transfer roller
F-2-19
Step 6: Secondary transfer
The toner on the ITB is transferred onto paper in this step.
A DC positive bias is applied to the secondary transfer roller to charge the back side of a fed paper. This allows the toner on the ITB to transfer onto paper positively.
At the completion of secondary transfer, a DC negative bias is applied to the secondary transfer roller to avoid soiling the back of paper with the toner on the ITB.
ITB
Paper
Secondary
transfer roller
DC bias
F-2-20
Step 7: Separation
The elasticity of paper causes the paper to separate from the ITB in the step.
This printer utilizes the static charge eliminator to reduce the charge on the back of paper, and weaken the electrostatic adhesion of the paper and facilitate separation.
This makes a separation operation easier.
ITB
Paper
Static
charge eliminator
Secondary
transfer roller
F-2-21
2.3.1.6 Fixing Block
A toner image transferred onto paper in the transfer block can be smeared easily by hands since only the electrostatic attraction holds the image on paper.
The toner on paper is melted and mixed by heat and pressure applied to it and then the image becomes permanent.
0011-6376
Step 8: Fixing
2-11
Chapter 2
The machine uses an on-demand method, which requires a low thermal capacity. The method enables the machine to start up quickly and its heater to use little
power while the machine is in a standby state. The machine may therefore be characterized by a short wait time and low energy consumption.
The machine applies a positive DC bias to its pressure roller for the purpose of reinforcing the retention of toner on print paper, consequently preventing stray toner.
Moreover, to prevent offset from the fixing film, the film surface is given a fluorine coating. The sleeve of the fixing film is made of rubber.
Fixing film
Fixing heater
Toner
Paper
DC bias
Pressure roller
F-2-22
2.3.1.7 ITB Cleaning Block
0007-4982
The ITB and drum are cleaned in this block by returning residual toner on the ITB into the waste toner case through the drum, as a preparation for the next print
operation.
This block comprises the following four steps:
Residual toner
In the secondary transfer step, not all the toner on the ITB is transferred onto paper. Some toner remains on the ITB. This toner is called the residual toner.
Step 9: Auxiliary ITB cleaning roller charging
In this step, the holding force of the residual toner on the ITB is strengthened to prevent the toner from falling from the ITB and scattering in the printer.
A DC positive bias is applied to the auxiliary ITB cleaning roller to charge the residual toner on the ITB positively. Then the residual toner is pressed to the ITB.
ITB
Charged
residual toner
Auxiliary ITB
cleaning roller
Residual toner
DC bias
F-2-23
Step 10: ITB cleaning roller charging
The residual toner on the ITB is charged uniformly positively in this step.
A DC positive bias and AC bias are applied to the ITB cleaning roller in order to apply positive charges to the residual toner. This will make the next step, ITB
cleaning, easier.
ITB
ITB cleaning roller
Charged
residual toner
Residual toner
AC bias
DC bias
F-2-24
Step 11: ITB cleaning
The positively charged residual toner on the ITB is returned to the drum in this step. A potential difference is produced between the drum and the ITB by applying
2-12
Chapter 2
a DC positive bias onto the ITB and a DC negative bias onto the drum, to return the residual toner to the drum.
Drum cartridge
Screw
Waste toner
transport plate
DC bias
(negative)
Screw
Photosensitive
drum
Residual toner
Stirrer
Waste toner
case
ITB
DC bias (positive)
F-2-25
Step 12: Drum cleaning
In this step, the residual toner is cleaned from the drum to prepare for the next print operation.
The residual toner on the drum is scraped away with the cleaning blade. The removed toner is collected with the waste toner screws into the waste toner case. This
allows the drum surface to be cleaned.
Drum cartridge
Screw
Cleaning blade
Waste toner
transport plate
Screw
Photosensitive
drum
Residual toner
ITB
Stirrer
Waste toner
case
DC bias (positive)
F-2-26
2-13
Chapter 2
2.3.2 Driving and Controlling the High-Voltage System
2.3.2.1 Outline
0011-6381
In this circuit, biases are applied to the primary charging roller, developing cylinder, primary transfer roller, secondary transfer roller, auxiliary ITB cleaning roller,
ITB cleaning roller, and fixing film. The CPU (IC101) in the DCNT Board controls the high-voltage power supply circuit and the sub high-voltage power supply
circuit through the ASIC (IC102) to generate the biases.
The block diagram of this circuit is illustrated below.
Photosensitive
Primary charging roller
drum
Developing
rotary
ITB
Blade
Primary
transfer
roller
Developing
cylinder
ITB cleaning roller
Secondary
transfer
roller
Auxiliary
ITB cleaning roller
Fixing high-voltage
generation circuit
Developing highvoltage generation
circuit
IC101
CPU
ITB cleaning highvoltage generation
circuit
Primary transfer
high-voltage
generation circuit
Auxiliary ITB cleaning
high-voltage
generation circuit
Secondary transfer
high-voltage
generation circuit
Sub high-voltage power
supply circuit
CHG
TR1
TR1S
TR2
TR2S
ICL
PREICL
DEV
FSR
Pressure roller
Primary charging
high-voltage
generation circuit
High-voltage
power supply circuit
IC102
ASIC
DCNT Board
F-2-27
2.3.2.2 Primary Charging Bias Generation
0008-1695
The primary charging bias is output to apply uniformed negative potential to the photosensitive drum surface as a preparation for image formation.
Two kinds of the biases, DC negative bias and AC bias, are generated in the primary charging high-voltage generation circuit in the high-voltage power supply
circuit. These two biases are applied together to the primary charging roller in the drum cartridge with a specified timing.
The values of the DC negative bias vary interlocked with the developing bias according to image density information sent from the SCNT Board.
Auxiliary developing bias is output to charge toner that was not charged by friction.
The printer's auxiliary developing bias is DC minus bias generated at auxiliary developing bias generation circuit inside high-voltage printed circuit board. Auxiliary
developing bias is applied onto the blade in the toner cartridge at a specified timing.
2.3.2.3 Developing Bias Generation
0008-1696
The developing bias is output to adhere toner to an electrostatic latent image formed on the photosensitive drum.
This bias is a DC negative bias generated in the developing high-voltage generation circuit in the high-voltage power supply circuit. The bias is applied to the developing cylinder in the toner cartridge with specified timing.
The values of the developing bias vary according to image density information sent from the SCNT Board. This allows the adjustment of image density.
The developing bias is output to charge toner that was not charged by friction.
This bias is applied onto the blade in the toner cartridge at a specified timing.
2.3.2.4 Primary Transfer Bias Generation
0008-1697
The primary transfer bias is output to transfer a toner image on the photosensitive drum to the ITB in the drum cartridge.
Two kinds of the biases, DC positive bias and DC negative bias, are generated in the primary transfer high-voltage generation circuit in the high-voltage power
supply circuit. The DC positive bias is output to the primary transfer roller in toner transfer. The DC negative bias is out-put to it in ITB cleaning.
The high-voltage power supply circuit applies these primary transfer biases to the primary
transfer roller according to a sequence.
The following are the biases applied at each sequence:
- Print bias (Note) (DC positive):
This bias is applied to the primary transfer roller to transfer a toner image on the photosensitive drum to the ITB in a print sequence.
- Cleaning bias (DC negative):
This bias is applied to the primary transfer roller to return residual toners adhered on the ITB to the photosensitive drum in a warm-up or last rotation sequence.
The values of the primary transfer bias vary according to the DCNT Board.
The DCNT Board changes the amperage of the primary transfer bias according to the PRIMARY TRANSFER CURRENT FEEDBACK (TR1S) signal sent from
the primary transfer high-voltage generation circuit and performs rated current control.
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Chapter 2
In full-color printing, as four toner layers in each colors are piled up on the ITB in primary transfer, the holding force of toner weakens as the transfer process
progresses for the 1st color, 2nd color... Therefore, after transferring the first color, the primary transfer DC (positive) bias is increased for the toner in the rest of
the colors to gain the holding force of the toner.
2.3.2.5 Secondary Transfer Bias Generation
0008-1698
The secondary transfer bias is output to transfer a toner image on the ITB onto paper.
Two kinds of the biases, DC positive bias and DC negative bias, are generated in the secondary transfer high-voltage generation circuit in the high-voltage power
supply circuit. The DC positive bias is output to the secondary transfer roller in toner transfer. The DC negative bias is output to it in cleaning.
The high-voltage power supply circuit applies these secondary transfer biases to the secondary transfer roller according to a sequence.
The following are the biases applied at each sequence:
- Print bias (DC positive):
This bias is applied to the secondary transfer roller to transfer a toner image on the ITB onto paper in a print sequence.
- Cleaning bias (DC negative):
This bias is applied to the secondary transfer roller to return residual toners adhered on the secondary transfer roller to the ITB in a warm-up or last rotation
sequence.
The values of the secondary transfer bias vary according to the DCNT Board.
The DCNT Board changes the amperage of the secondary transfer bias according to the SECONDARY TRANSFER CURRENT FEEDBACK (TR2S) signal sent
from the secondary transfer high-voltage generation circuit and performs rated current control.
2.3.2.6 Auxiliary ITB Cleaning Bias Generation
0008-1699
The Auxiliary ITB cleaning bias is output to prevent residual toners on the ITB from falling on a paper path.
Two kinds of the biases, DC positive bias and DC negative bias, are generated in the auxiliary ITB cleaning high-voltage generation circuit in the sub high-voltage
power supply circuit.
The DC positive bias is output to the auxiliary ITB cleaning roller to charge residual toners on the ITB positively. The DC negative bias is output to the auxiliary
ITB cleaning roller to clean negatively charged residual toner on the roller.
The Sub high-voltage power supply circuit applies these auxiliary ITB cleaning biases to the auxiliary ITB cleaning roller during the cleaning period with specified
timing.
2.3.2.7 ITB Cleaning Bias Generation
0008-1700
The ITB cleaning bias is output to clean the ITB.
Three kinds of the biases, DC positive bias, DC negative bias, and AC bias, are generated in the ITB cleaning high-voltage generation circuit in the high-voltage
power supply circuit.
The AC bias and DC positive bias are output to the ITB cleaning roller to clean positively charged residual toners on the ITB. The AC bias and DC negative bias
are output to the ITB cleaning roller to clean negatively charged residual toners on the roller.
The high-voltage power supply circuit applies these ITB cleaning biases to the ITB cleaning roller during the cleaning period with specified timing.
2.3.2.8 Fixing Bias Generation
0011-6387
The fixing bias is generated and used to prevent adhesion to the fixing sleeve of toner that is on print paper before fixing takes place.
The fixing bias is a DC positive bias generated in the fixing height-voltage generation circuit of the high-voltage power supply PCB. It is applied to the pressure
roller of the fixing assembly at such times as programmed in advance.
2.3.3 Image Stabilizaton Control
2.3.3.1 Outline
0008-1703
This printer performs image stabilization control using the image density detection function (see note) in order to reduce image density variations caused by changes
in environments, deterioration of the drum or toner, etc.
Two kinds of the image stabilization controls, image density calibration (D-max) control and image halftone calibration (D-half) control, are executed as necessary.
Specified conditions to perform image stabilization calibration control are listed in the following:
- Power is turned on.
- Cartridge is replaced.
- After printing 800 images or more (mono color: 800 pages, full color: 200 pages)
- After 12 hours in the absence of a print command
- In response to a command for execution from the SCNT Board.
Image density detection function
This printer has functions of striking light to image density patterns in each color formed on the ITB and measuring the density of the patterns from the amount of
reflected light.
The DCNT Board emits light from the density sensor and strikes the light to each detection pattern. Then the reflected light off the patterns is received at a light
receiver and returned to the DCNT Board as the IMAGE DENSITY signals.
The DCNT Board converts the input IMAGE DENSITY signals (analog values) to density values (digital values) and stores them.
Detection
pattern
Density sensor
ITB
F-2-28
The DCNT board resets the image density to the default setting and starts the engine in the event of the following: at time of image density detection, the lightreceiving segment does not receive light at all, or the level detected by the density sensor does not match a specific value.
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Chapter 2
2.3.3.2 Image Density Calibration (D-max) Control
0008-1704
This control is performed to stabilize the image density of the printer engine.
The DCNT Board forms density patterns in each color on the ITB as varying the developing bias when specified conditions are met. Then the DCNT Board measures
the density of the patterns with the density sensor and controls the developing bias to obtain a proper density based on the measured density.
2.3.3.3 Image Halftone Calibration (D-half) Control
0008-1705
This control is utilized to measure a halftone density output from the SCNT Board in order for the SCNT Board to perform halftone calibration, and to return the
measurement results to the SCNT Board.
The DCNT Board forms image detection patterns for each color on the drum with a proper developing bias specified in the D-max control based on image data sent
from the SCNT Board. Then the DCNT Board measures the patterns with the density sensor and returns image data to the SCNT Board. The SCNT Board performs
the halftone calibration to obtain an ideal halftone image based on data.
2.3.4 Developing Rotary
2.3.4.1 Outline
The developing rotary has a function of moving a toner cartridge to a specified position. There are four toner cartridges (Y, M, C, Bk) stored in the rotary.
The rotary is illustrated in the figure below.
0008-1706
PM
704
DCM
703
Engaging
motor
Rotary
engaging sensor
PS712
DEVELOPING ROTARY
HOME POSITION
DETECTION signal
DEVELOPING ROTARY
MOTOR DRIVE signal
STOPPER SOLENOID
DRIVE signal
ENGAGING MOTOR
DRIVE signal
DEVELOPING ROTARY
ENGAGING
DETECTION signal
DCNT Board
Developing
rotary
stopper
solenoid
SL93
Developing
rotary motor
Developing rotary
home position
sensor
PS51
Memory tag
contact
Developing rotary/
toner level detection circuit
ITB
Bk
Y
Engaging cam
Toner cartridge
Photosensitive
drum
C
M
Memory tag
F-2-29
The developing rotary motor (DCM703) rotates the rotary so that the EP-87 toner cartridges in each-color face the drum one by one. As the rotary stops, the developing rotary stopper solenoid (SL93) is driven to lock the rotary.
The rotary performs engaging operations of the rotary and of the memory tag contacts, with the engaging motor (PM704). (See the memory tag engaging control
on page 2-60 for details on an engaging operation of the memory tag contacts.)
There are two sensors for the rotary, which performs position detection and engaging detection.
The functions the rotary has are described next.
2.3.4.2 Developing Rotary Rotation Control
0008-1707
This control is utilized to rotate the rotary during a print or toner cartridge removal operation in order to move each toner cartridge to its specified position.
The DCNT Board moves the rotary by turning on/off the developing rotary motor (DCM703) as monitoring the position of the rotary with the developing rotary
home position sensor (PS51). When the rotary stops, the DCNT Board drives the developing rotary stopper solenoid (SL93) to lock the rotary.
The DCNT Board monitors the PS51 to determine the stopping position of the rotary. It detects the position of the rotary from time for four cartridge flags located
on the left side of the rotary to pass the PS51.
The four cartridge flags are for detecting the developing positions for each cartridge. The DCNT Board determines a cartridge developing position when these flags
interrupt the PS51, and stops the rotation of the DCM703.
The flags are used for detecting the removing position for each cartridge also. The DCNT Board rotates the DCM703 for a specified period from the position at
where each flag interrupts the PS51 and then stops it. This position will be a removing position for each cartridge.
The DCNT Board will assume any of the following conditions to be a fault in the developing rotary locking mechanism and will stop the printer engine and, at the
same time, communicate the fact to the SCNT Board:
1) The home position detecting flag cannot be detected by PS51.
2) A fault exits during the period of detection between flags by PS51.
2-16
Chapter 2
DCNT Board
ROTHPS
/RHLDSLD
Developing rotary/
toner level detection circuit
Developing rotary
stopper solenoid SL93
Bk cartridge flag
Developing rotary
home position sensor
PS51
Home position flag
(Y cartridge flag)
Photosensitive
drum
Bk
Y
C
M
M cartridge flag
C cartridge flag
PS51
Y cartridge flag
PS51
Y cartridge flag
Photosensitive
drum
Bk
Photosensitive
drum
Y
Bk
Y
C
M
M
<When the Y cartridge is at developing position>
C
<When the Y cartridge is at replacing position>
F-2-30
2.3.4.3 Developing Rotary Engaging Control
0008-1708
This control is utilized to engage a developing cylinder in the rotary to the drum in order to transfer the toner image on the drum onto the ITB.
In rotary engaging control, the DCNT Board switches the rotational direction of the engaging motor (PM704) and moves the rotary to either of two positions, engaging position and disengaging position.
At the time of rotary engaging (travelling from a disengaging position to an engaging position), the DCNT Board rotates the engaging motor clockwise for a specified period. This allows the rotary engaging cam to rotate and then the engaging plate is pressed out. The developing cylinder is engaged to the drum.
At the time of rotary disengaging (travelling from an engaging position to a disengaging position), the DCNT Board rotates the engaging motor counterclockwise
and instructs the reverse operation of rotary engaging. Then the developing cylinder is disengaged from the drum.
A mechanism used in this control is also used in a memory tag contact engaging operation.
Developing rotary position detection is performed by the DCNT Board monitoring the rotary engaging sensor (PS712).
2-17
Chapter 2
Developing rotary
Drive gear
Engaging motor
(PM704)
Photosensitive drum
Rotary engaging cam
Pressure plate
Rotary engaging sensor
Engaging detection flag
<When the developing rotary is at disengaging position>
Developing cylinder
Photosensitive
drum
Engaging cam
Pressure plate
<When rotary is disengaging>
<When rotary is engaging>
F-2-31
2.3.4.4 Developing Rotary Position Detection
0008-1709
This printer has a function of detecting the rotary engaging position between the rotary and drum determined in the developing rotary engaging control.
This detection is performed by the DCNT Board monitoring the output of the engaging sensor (PS712). The DCNT Board determines either of three modes: print,
initial, and memory tag communication, from whether the engaging detection flag located on the end of the drive gear shaft interrupts the PS712.
T-2-5
Status
Mode
1. Print mode
Developing
rotary
Memory tag
contact
Engaging
Disengaging
Rotary engaging
sensor (PS712)
Relationship between the
rotational direction of the
engaging motor and the
position of the sensor flag
SENSOR
FLAG
2
3
"H"
2. Initial mode
Disengaging
CCW
Disengaging
CW
1
"L"
3. Memory tag
Disengaging
communication mode
Engaging
"L
When the power is turned on or the top cover is closed, the DCNT Board executes as follows based on the output of the PS712.
When the output of the PS712 is "H", the DCNT Board determines that the printer is in print mode (#1 in the table above) and rotates the engaging motor clockwise
for a specified period to switch the mode to initial mode in order to prepare for the next operation. When the output is "L", the DCNT Board cannot determine
whether the printer is in initial mode (#2 in the table above) or memory tag communication mode (#3 in the table above). In such a case, the DCNT Board rotates
the engaging motor counterclockwise for a specified period to switch the mode to print mode. Then it rotates the motor clockwise for a specified period to switch
the mode to initial mode. The DCNT Board detects mode the printer is actually in from the detection results of the PS712 and prepare for the next operation.
The DCNT Board determines a developing rotary engaging mechanism abnormality, stops the pirnter engine, and notifies it to the SCNT Board under the following
conditions in engaging failure detection:
1) The PS712 does not output "L" even if the engaging motor rotates counter clockwise for a specified period (0.2 seconds) at developing rotary disengaging.
2) The PS712 does not output "H" even if the engaging motor rotates clockwise for a specified period (0.2 seconds) at developing rotary engaging.
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Chapter 2
2.3.5 Toner Cartridge
2.3.5.1 Outline
0007-4983
The toner cartridge has a function of forming a visible image on the drum with toner.
There are four toner cartridges in Y, M, C, and Bk, which are the same in structure.
The following indicates the configuration of the cartridges and loads.
PM
704
Engaging
motor
Developing rotary/
toner level detection circuit
TONER CARTRIDGE
MOTOR DRIVE signal
Toner cartridge data
ENGAGING MOTOR
DRIVE signal
DCNT Board
DCM EP-87 Toner cartridge
motor
705
Rotary
engaging sensor
PS712
Engaging
cam
Memory tag
Memory tag
contact
Toner level sensor
(light emitter)
Bk
C
Photosensitive
drum
Y
M
Developing cylinder
Toner level sensor
(light receiver)
Stirrer
F-2-32
This toner cartridge is structured with a developing cylinder, and stirrer. The toner cartridge motor rotates these parts.
The memory tag is installed in each cartridge. The engaging motor rotates as required to operate the memory tag contact cam. This allows the memory tag contact
on the printer side and that on the cartridge side to contact each other, and enables the DC controller to communicate with each toner cartridge.
Toner level detection is performed with an LED (light emitter) and a photodiode (light receiver) on the developing rotary/toner level detection circuit.
The functions and controls that the cartridge have are described next.
2.3.5.2 Memory Tag
0007-4984
The memory tag is a non-volatile memory built into the toner cartridge. It stores cartridge usage condition data. The DCNT Board reads and writes memory data
constantly to detect the usage conditions of each toner cartridge.
The DCNT Board reads and writes to the memory tag through the memory tag contacts.
The memory tag contacts are disengaged from the memory tag normally. However, when the DCNT Board reads and writes to the memory tags in each toner cartridge, it performs memory tag contact engaging control. The DCNT Board starts memory data communication as the toner cartridge contacts with the memory tag
contact. After receiving memory data, the DCNT Board updates the information with specified timing and writes it to the memory tags for each cartridge.
The DCNT Board instructs the memory tag to read or write under the following conditions:
<Read>
- Power is turned on.
- Top cover is closed.
<Write>
- After 50 papers printing.
- When a Change Has Occurred to the Data on the Lives of Parts.
Memory tag
Memory tag contact
Memory data
DCNT Board
EP-87 toner cartridge
F-2-33
2.3.5.3 Memory Tag Contact Engaging Control
0007-4985
This control is utilized to contact memory tag contacts on the printer side with that on the toner cartridge side in order to enable communication between the memory
tags in each toner cartridge and the printer.
The DCNT Board moves the memory tag contact to either of two positions, engaging position or disengaging position, by switching the rotational direction of the
engaging motor (PM704).
At the time of memory tag contact engaging (travelling from a disengaging position to an engaging position), the DCNT Board rotates the engaging motor counterclockwise for a specified period. This allows the memory tag contact engaging cam to rotate. Then the contact is pressed out and engaged to the memory tag.
At the time of memory tag contact disengaging (travelling from a engaging position to a disengaging position), the DCNT Board rotates the engaging motor counterclockwise and instructs the reverse operation of the contact engaging. This allows the contact to be disengaged from the memory tag.
2-19
Chapter 2
A mechanism used in this control is also used in a developing rotary engaging operation.
The developing rotary position detection is also performed by the DCNT Board monitoring the rotary engaging sensor (PS712).
Photosensitive
drum
Developing rotary
Drive gear
Memory tag
Memory tag
contact Engaging motor
(PM704)
Memory tag contact
engaging cam
<When the memory tag contact is at disengaging position>
Photosensitive
drum
Memory tag
contact
Memory tag
Engaging cam
Pressure plate
<When memory tag is engaging>
<When memorytag is disengaging>
F-2-34
2.3.5.4 Cartridge Presence Detection
0007-4986
This detection is utilized to detect the presence of the cartridge.
When the power is turned on or the top cover is closed, the DCNT Board reads in data (cartridge ID) from the memory tags in each toner cartridge. When the DCNT
Board successfully reads data, it determines a cartridge presence.
If the DCNT Board determines a cartridge out, it notifies the error to the SCNT Board.
2.3.5.5 Toner Cartridge Life Detection
0007-4987
a. Outline
This detection is utilized to detect whether the toner cartridge has reached the end of its life.
When the power is turned on or the top cover is closed, the DCNT Board monitors the following two items. It determines an toner cartridge end-of-life if either of
the items reaches its specified value.
a. Developing cylinder life (usage hour)
b. Toner level
The life of the toner cartridge is indicated to the SCNT Board in 2 steps (warning, end of life); the printer engine will be stopped only when the end of life has been
reached. The life of the developing cylinder and the level of remaining toner are checked as follows:
b. Developing cylinder life detection
The life of the developing cylinder is detected by the DCNT Board monitoring the cumulative usage hours of the developing cylinder, which stored in the memory
tag.
Developing cylinder usage hour (DC application time) data sent from the DCNT Board is written in the memory tag in the toner cartridge. The DCNT Board updates
data with specified timing. If updated data, developing cylinder cumulative usage hours, reaches a specified value, the DCNT Board determines a developing cylinder end-of-life.
c. Toner level detection
This printer utilizes a through-beam sensor for toner level detection.
The toner level is detected by the DCNT Board monitoring the toner level detection unit structured with a light emitter (LED) and a light receiver (PD) (Note:1).
After the start of a print operation, the DCNT Board emits light from the LED with the LED DRIVE (P3.3V) signal. The light emitted from the light emitter passes
through the light guide in the cartridge and enters into the cartridge. The light passes through it and again the light guide. Then the light is detected at the light
receiver and output as the TONER LEVEL DETECTION (TONS) signal to the DCNT Board. The DCNT Board detects the toner level from the cumulative detection time of the TONS signal during one rotation of the stirrer in the cartridge.
The DCNT Board determines that the toner level is low when the cumulative detection time of the TONS signal exceeds a specified value (Note:2).
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Chapter 2
LED DRIVE signal
(P3.3V)
TONER LEVEL DETECTION signal
(TONS)
Light guide
Light
emitter
Toner cartridge
Light
receiver
Developing rotary/
toner level detection circuit
DCNT Board
Light
emitter
Light
emitter
Toner
Stirrer
Light
receiver
Light
receiver
<High toner level>
Stirrer
<Low toner level>
F-2-35
Note 1. In full-color printing, the detection is performed for the cartridges in each color. In monochrome printing, it is performed just for the Bk cartridge.
Note 2. If the toner level written in the memory tag is lower than the detected toner level, data is not updated.
2.3.6 Drum Cartridge
2.3.6.1 Outline
0008-1710
The machine's drum cartridge is equipped with a mechanism that forms images on the ITB. The drum cartridge consists of a drum cartridge and an ITB unit constructed as a single entity.
The following shows the machine's cartridge and the arrangement of loads.
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Chapter 2
Waste toner
detection circuit
Memory tag
contact
ITB
Main DCM
motor 701
Waste toner screw
Memory tag
Waste toner
transport plate
Primary
charging
roller
Waste toner screw
Waste toner
sensor
(light emitter)
Photosensitive
drum
Primary
transfer
roller
Roller
engaging
clutch
CL2
ROLLER ENGAGING
DETECTION signal
ITB feed roller
Drum
cartridge data
MAIN MOTOR
DRIVE signal
ROLLER ENGAGING
CLUTCH DRIVE signal
DCNT Board
Stirrer
Roller
engaging
sensor
PS714
Waste toner
sensor (light receiver)
ITB cleaning roller
Waste toner case
Auxiliary
ITB cleaning roller
ITB drive roller
Roller
engaging cam
F-2-36
The cartridge consists of the photosensitive drum, primary charging roller, waste toner transport plate, etc. These parts are driven by the main motor (DCM701).
This cartridge performs engaging operations for two rollers, the ITB cleaning roller and auxiliary ITB cleaning roller, with the DCM701. Position detection for
these two rollers are performed with a common sensor.
A memory tag is installed into the drum cartridge. The memory tag contact makes contact with the memory tag in the cartridge constantly when the cartridge is
installed in the printer.
The waste toner detection is performed by an LED (light emitter) and a photodiode (light receiver) on the waste toner detection circuit.
The functions and controls of the cartridge are discussed next.
2.3.6.2 Cleaning Roller Engaging Control
0008-1711
In this control, the two rollers, the ITB cleaning roller and auxiliary ITB cleaning roller, are engaged/disengaged from the ITB to clean residual toners on the ITB.
The operations of this control are described in the following:
1) At printing, the DCNT Board checks that the two rollers, ITB cleaning roller and auxiliary ITB cleaning roller, are at their home positions (Note:1) in secondary
transfer roller position detection.
2) At the timing of the start of secondary transfer, the DCNT Board let out the roller engaging clutch (CL2). This transmits the drive of the main motor (DCM701)
to the engaging cam.
Then the roller bushing is pushed out and the two rollers start to engage to the ITB.
3) At this point, the DCNT Board is monitoring the output of the PS714, When the output becomes "L", it lets out the CL2. This allows the cam to stop and the two
rollers to stop at each engaging position.
4) After a print operation, the DCNT Board let in the CL2 again for 0.2 seconds. This disengages the two rollers from the ITB.
5) The DCNT Board monitors the output of the PS 714, When the output becomes "L", it lets out the CL2. This allows the cam to stop and the two rollers to stop
at each home position. Then, it is ready for the next print operation.
Note 1. The home positions of each roller are positions at where the rollers are disengaged from the ITB by the roller bushing.
Note 2. The operation of the engaging cam used in this control is also used in the secondary transfer roller engaging control.
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Chapter 2
DCNT Board
Main motor
Roller
engaging
clutch
DCM
701
CL2
Engaging
drive gear
Roller
engaging
sensor
PS714
ITB cleaning roller
Auxiliary
ITB cleaning roller
Engaging cam
Bushing
Bushing
ITB
ITB cleaning
roller
Auxiliary
ITB cleaning
roller
Engaging cam
<Disengaging>
<Engaging>
F-2-37
2.3.6.3 Memory Tag
0008-1712
The memory tag is a non-volatile memory built into the drum cartridge. It stores cartridge usage condition data. The DCNT Board detects drum cartridge usage
conditions by reading and writing memory data.
A memory tag in the drum cartridge contacts with the memory tag contact constantly when the cartridge is installed in the printer.
After receiving memory data from the memory tag through the memory tag contact, the DCNT Board updates data with specified timing and rewrites it to the memory tag.
The DCNT Board instructs the memory tag to read or write under the following conditions:
<Read>
- Power is turned on.
- Top cover is closed.
<Write>
- After 50 papers printing.
- When a Change Has Occurred to the Data on the Lives of Parts.
2-23
Chapter 2
DCNT Board
Memory tag contact
Memory tag
Drum cartridge
F-2-38
2.3.6.4 Detecting the ITB Home Position
0008-1713
The machine checks the ITB home position to ensure the correct image write start position using the ITB home position sensor (PS71), which checks the position
with reference to the home position detection faces (4 light-blocking faces) found on the edge of the ITB belt as follows:
1) When it receives the print command, the DCNT Board starts to rotate the ITB belt. When PS71 detects a light-blocking face, it sends TOPSNS to the DCNT
Board.
2) The DCNT Board assumes the first TOPSNS signal to indicate the home position (HP1), and increases the count each time a new light-blocking face is detected
(HP2, HP3, HP4).
3) In the case of full color operation, the DCNT Board uses these signals to generate the vertical sync signal (/TOP) 4 times, and sends them to the SCNT Board.
Thereafter, the DCNT Board receives video data of each color from the SCNT Board 4 times, and draws images of individual colors on specific points on the ITB.
The DCNT Board monitors the TOPSNS signal at all times, and will identify a fault in the ITB home position sensor in the event of the following condition; as a
result, it will stop the printer engine and, at the same time, will communicate the nature of the fault to the SCNT Board.
2-24
Chapter 2
ITB HOME POSITION
LED EMISSION signal
(TOPLED)
Interrupting areas
ITB HOME POSITION
DETECTION signal
(TOPSNS)
DCNT Board
SCNT Board
ITB home position
sensor (PS71)
Drum cartridge
Interrupting areas
/SC
(Print command)
TOPSNS
HP HP HP HP HP
1
2 3 4 1
HP
1
HP
1
/TOP
VIDEO signals
(Mono-color print)
Bk
Y
M
C
Bk
(Full-color print)
F-2-39
2.3.6.5 Drum Cartridge Presence Detection
0008-1714
This detection is utilized to detect the presence of the drum cartridge.
When the power is turned on or the top cover is closed, the DCNT Board determines the presence or absence of the cartridge by monitoring the following two items:
1) PS71 (ITB HOME POSITION DETECTION signal) outputs "L" periodically.
2) Output results from the TR2 (FEED BACK signal for secondary transfer bias) exceed a specified value.
The DCNT Board determines a cartridge presence only when the three conditions above are satisfied.
When the DCNT Board determines a cartridge absence, it stops the printer engine and notifies an drum cartridge out to the SCNT Board.
2-25
Chapter 2
TOPSNS
Interrupting areas
TR2S
DCNT Board
SCNT Board
ITB home position
sensor (PS71)
H.V.T
Drum cartridge
Interrupting areas
Secondary
transfer roller
F-2-40
2.3.6.6 Checking the Life of the Drum Cartridge
0008-1715
a. Outline
The machine uses the following mechanism to check the life of the drum cartridge.
When the power is turned on, the upper cover is closed, or a print job is over, the DCNT Board checks on the following 2 items, and will assume that the cartridge
has reached the end of its life if any of them reaches a specific value:
- life of photosensitive drum (hours of use)
- amount of waste toner
The life of the drum cartridge is indicated to the SCNT Board in 2 steps (warning, end of life); the printer engine is stopped only when the end of life has been
identified.
The following mechanisms are used to detect the end of life of the photosensitive drum and the level of waste toner:
b. End of Life of the Photosensitive Drum
The end of life of the photosensitive drum is checked by the DCNT Board by monitoring how long the photosensitive drum has been used with reference to the data
stored in the memory tag. The memory tag retains data on the period during which the photosensitive drum has been used (i.e., length of primary AC application +
number of drum rotations) sent by the DCNT Board.
The DCNT Board updates the data each tine the power is turned on, the upper cover is closed, or a print job is over; when the cumulative period of use reaches a
specific level, it will identify the condition as indicating the need of replacement of the drum cartridge.
c. Waste Toner
The machine is equipped with a mechanism to find out when the cartridge becomes full of waste toner. The detection is undertaken by the DCNT Board by monitoring the output of the waste toner detection mechanism, which consists of a light-emitting member (LED) and a light-receiving member (PD) as well as a PCB.
The DCNT Board causes the LED to emit light using the LED drive signal (P3.3V); the light from the light-emitting member reaches the cartridge along the light
guide mounted to the cartridge. The light them moves through the cartridge, and is detected by the light-receiving member after passing along the light guide; the
result is then sent to the DCNT Board in the form of the waste toner detection signal (WASTONS).
The DCNT Board checks the level of waste toner with reference to the cumulative period of WASTONS for each single rotation of the stirring plate inside the
cartridge when the power is turned on, the upper cover is closed, or a print job is over, and will assume that the cartridge is full of waste toner if it finds that the
level has reached a specific value.
2-26
Chapter 2
Light guide
Waste toner
detection circuit
LED DRIVE signal
(P3.3V)
Light
receiver
WASTETONER FULL DETECTIONsignal
(WASTONS)
Light
emitter
DCNT Board
Waste toner
transport plate
Light
emitter
Stirrer
Light
receiver
<High waste toner level>
<Low waste toner level>
F-2-41
2.3.7 Secondary Transfer Mechanism
2.3.7.1 Outline
0008-1716
The transfer unit has a function of secondarily transferring the toner transferred primarily on the ITB onto paper.
The unit is structured with the secondary transfer roller and engaging lever, which are operated by the main motor drive.
The secondary transfer roller rotates by the motor drive. The engaging lever performs an engaging operation between the secondary transfer roller and ITB in roller
engaging control.
2-27
Chapter 2
ROLLER ENGAGING
DETECTION signal
MAIN MOTOR
DRIVE signal
ROLLER ENGAGING
CLUTCH DRIVE signal
DCNT Board
Main DCM
motor 701
PS714
Roller
engaging
clutch
CL2
Roller
engaging
cam
Engaging lever
Secondary transfer rollers
F-2-42
2.3.7.2 Secondary Transfer Roller Engaging Control
0008-1717
This control is utilized to perform an engaging/disengaging operation between the secondary transfer roller and ITB in order to transfer the toner on the ITB to paper.
The operations of this control are described in the following:
1) At printing, the DCNT Board checks that the secondary transfer roller is at its home position (Note:1) in secondary transfer roller home position detection.
2) At the timing of the start of secondary transfer, the DCNT Board let in the roller engaging clutch (CL2). This transmits the drive of the main motor (DCM701)
to the engaging cam. Then the engaging lever is pushed out and the secondary transfer roller starts to engage to the ITB.
3) At this point, the DCNT Board is monitoring the output of the PS714, When the output becomes "L", it lets out the CL2. This allows the cam to stop and the
secondary transfer roller to stop at its engaging position.
4) After a print operation, the DCNT Board lets in the CL2 again for 0.2 seconds. This disengages the secondary transfer roller from the ITB.
5) The DCNT Board monitors the output of the PS714, When the output becomes "L", it lets out the CL2. This allows the cam to stop and the secondary transfer
roller to stop at its home position.
Note 1. The home position for the secondary transfer roller is the state in which it is disengaged from the ITB.
Note 2. The operation of the engaging cam used in this control is also used in the cleaning roller engaging control.
2-28
Chapter 2
/TR2CLD
ICLRSNS
DCNT Board
DCM Main motor
Roller 701
engaging
clutch
CL2
Roller engaging
detection gear
Roller
engaging
sensor
PS714
Engaging cam
Secondary
transfer roller
Engaging lever
ITB
Engaging cam
Secondary
transfer roller
Engaging lever
<Disengaging>
<Engaging>
F-2-43
2.3.7.3 Secondary Roller Position Detection
0008-1719
This printer has a function of detecting the engaging position of the secondary transfer roller between the roller and ITB.
The home position of the roller is detected by the DCNT Board monitoring the roller engaging sensor (PS714) and FEEDBACK (TR2S) signal for the secondary
bias.
The DCNT Board detects whether the roller is at its home position (Note) when the power is turned on or the top cover is closed. This detection is performed by a
flag located at the end of the engaging detection gear interrupting the PS714. When the roller is at its home position, the PS714 outputs "L".
When the engaging detection gear is not at its home position; the PS714 is "H", the DCNT Board rotates the main motor and let in the roller engaging clutch (CL2)
for a specified period to return the gear to its home position.
Then the DCNT Board detects the position of the secondary transfer roller, engaging and disengaging, by monitoring the FEEDBACK (TR2S) signal for the secondary transfer bias.
When the roller is at its engaging position, the resistance of the roller increases and the value of the TR2S signal decreases since the roller contacts with the ITB.
When the roller is at a disengaging position, the resistance decreases and the value increases.
If the value of the TR2S signal does not vary when the CL2 is on, the DCNT Board stops the printer engine and notifies a secondary transfer roller engaging mechanism abnormality to the SCNT Board.
The home position for the secondary transfer roller is the state in which it is disengaged from the ITB.
2-29
Chapter 2
TR2S
/TR2CLD
ICLRSNS
DCNT Board
DCM
Roller
701
engaging
clutch
H.V.T
Main motor
CL2
Roller engaging
detection gear
Roller
engaging
sensor
PS714
Secondary
transfer roller
Engaging cam
Engaging lever
F-2-44
2.4 Pickup and Feed System
2.4.1 Overview/Configuration
2.4.1.1 Overview
0007-4988
The pickup/feed system serves to pick up and move paper, and it consists of various feed rollers.
The machine possesses 2 inlet slots for paper (i.e., multifeeder tray and paper feeder) and 2 outlet slots (face-up tray and face-down tray).
The presence/absence of paper is checked by the paper sensor (PS716, for the paper feeder) and by the multifeeder paper sensor (PS718, for the multifeeder tray).
The various feed rollers of the machine are controlled by the DCNT board, which governs 2 motors, 2 clutches, and 2 solenoids.
The paper path is equipped with 3 photointerrupters (PS1, PS711, PS717, PS720), checking to see whether paper has reached or moved past a specific sensor position.
If paper fails to reach or move past a specific sensor within a specific period of time, the CPU on the DCNT board will identify the condition as being a jam, and
communicate the fact to the SCNT board.
The following is a diagram showing how the machine's motors, solenoids, and sensors are arranged:
2-30
Chapter 2
MAIN MOTOR
DRIVE signal
MULTI-PURPOSETRA YPICKUP SOLENOID DRIVE signal
(/MPSLED)
REGISTRATION
CLUTCH DRIVE signal
(/REGCLD)
REGISTRATION PAPER
DETECTION signal
(REGS)
ROLLER ENGAGING
CLUTCH DRIVE signal
(/TR2CLD)
MULTI-PURPOSE
TRAY
PAPER DETECTION signal
(/MPPAS)
Facedown tray
delivery roller
FRONTFIXING PAPER
DETECTION signal (FSRBSNS)
PM
702
FIXING DELIVERY
APER
P
DETECTION signal
(FSROUT)
FIXING MOTOR
DRIVE signal
DCNT Board
ITB
Multi-purpose
tray pick-up
Registration roller
shutter
Engaging
cam
PS1
PS
711
PS
720
PS
715
PS
Separation 718
pad
SL92
Lifting
plate
Pressure roller
Feed
belt
CL2
Secondary
transfer
roller
CL1
Registration
roller
DCM
701
F-2-45
PS1: Fixing delivery paper sensor
PS711: Registration paper sensor
PS718: Multi-purpose tray paper sensor
PS720: Front fixing paper detection sensor
DCM701: Main motor
PM702: Fixing motor
SL92: Multi-purpose tray pick-up solenoid
CL1: Registration clutch
CL2: Roller engaging clutch
The pickup/feed system can broadly be divided into the following 2 blocks:
- pickup/feeding assembly, i.e., between the pickup slot (multifeeder/feeder) and fixing assembly inlet
- fixing/delivery assembly, i.e., from fixing assembly to delivery slot
fixing/delivery assembly
pickup/feeding assembly
F-2-46
2.4.1.2 Pickup/Feeding Assembly
0007-4989
The pickup/feeding assembly consists of the following: the pickup assembly, which serves to pickup up a single sheet of print paper from the cassette/multifeeder
manual fee tray, and the feeding assembly, which serves to move the incoming paper as far as the fixing assembly. These 2 assemblies have the following functions:
<Cassette>
1. picks up print paper from the cassette
<Multifeeder>
1. picks up printed paper placed in the multifeeder tray
<paper path>
1. corrects the movement of paper by removing skew
2. controls the speed at which paper is moved to suit paper type
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Chapter 2
3. controls the speed at which paper is moved to suit the temperature inside the machine
2.4.2 Other Control
2.4.2.1 Skew Correction Function
0008-1720
This function is utilized to correct the skew of the paper to be fed, using the registration shutter method.
The operations of this function are discussed below.
When paper is fed to the registration roller, the leading edge of paper is pushed against the registration shutter to correct a skew (1). Paper is warped as the feed
roller keeps pushing it when it is pushed against the shutter (2). The shutter is lifted up by the stiffness of paper as paper warps, and paper passes through the shutter
(3). It allows the skew of paper to be corrected.
Paper
Registration shutter
[1]
Registration shutter
Paper
Registration roller
[2]
[3]
F-2-47
2.4.2.2 Feed Speed Control
In this control, a feed speed is changed based on the types of the fed paper in order to prevent fixing defects.
The DCNT Board changes a feed speed in two levels based on a paper type specification command sent from the SCNT Borad.
Types of paper and their feed speeds are indicated below.
0008-1721
T-2-6
Media type
Print type
Feed speed
Plain paper
Full-color
Normal speed
Heavy paper
Full-color
OHP sheet
------------
Thick paper
Full-color
Special paper
Full-color
Mono-color
Mono-color
Mono-color
Mono-color
Half speed
Mono-color
Envelope
Full-color
Mono-color
Label
Full-color
Mono-color
2.4.2.3 Detecting the Machine Inside Temperature
0008-1723
As a means to prevent overheating inside the machine, the machine is equipped with a thermistor (TH3) used to detect the temperature inside the machine (found
near the toner cartridge motor).
If the STNT board finds that the machine inside temperature has exceeded an upper limit (Td) at time of continuous printing/copying, it will increase the distance
between sheets to prevent overheating. If the temperature falls below a specific level (Tu), on the other hand, it changes the sheet-to-sheet distance to normal.
2-32
Chapter 2
TH3 temperature
TH3 temperature
Td=50
Tu=45
0
60
30
Print time (minutes)
F-2-48
2.4.3 Detection Jams
2.4.3.1 Jam Detection Outline
2.4.3.1.1 Outline
0007-4990
To detect the presence of paper and whether paper has been correctly fed, the following paper sensors are provided:
- Registration sensor (PS711)
- Fixing delivery paper sensor (PS1)
- Fixing front paper sensor (PS720)
- paper feed sensor (PS717)
The CPU in the DCNT Board determines whether a paper jam has occurred by checking for the presence of paper at the sensor unit at the timing stored in the CPU.
If the CPU determines a jam, it stops a print operation and notifies the jam occurrence to the SCNT Board.
Occurrence timings for each jam are listed below. A specified period is timed at a normal speed (1/1-speed).
2.4.3.2 Delay Jams
2.4.3.2.1 Pickup Delay Jam
0007-4991
If the leading edge of paper does not reach the registration sensor (PS711) within a specific period of time (T) after the start of pickup (i.e., the clutch or the solenoid
at the inlet slot goes on), the CPU will identify the condition as being a pickup delay jam.
T = about 1.1 sec (multifeeder tray) or about 1.7 sec (250-sheet feeder)
2.4.3.2.2 Delivery Delay Jam
0007-4992
When the leading edge of paper does not reach the fixing delivery paper sensor (PS1) within a specified period (t) after the start of a re-pick-up operation (the
registration clutch is on), the CPU determines a delivery delay jam.
t = Approx. 2.3 seconds.
2.4.3.3 Stationary Jams
2.4.3.3.1 Pick-up Stationary Jam
0007-4993
When the trailing edge of paper does not pass the registration sensor (PS711) within a specified period (t) after the start of a re-pick-up operation (the registration
clutch is on), the CPU determines a pick-up stationary jam.
t = Approx. 3.4 seconds.
2.4.3.3.2 Delivery Stationary Jam
0007-4994
When the leading edge of paper does not pass the fixing delivery paper sensor (PS1) within a specified period (t) after it has passed the registration sensor (PS711),
the CPU determines a delivery stationary jam.
t = Approx. 2.4 seconds.
2.4.3.4 Other Jams
2.4.3.4.1 Fixing Unit Wrapping Jam
0007-4995
CPU detects fixing unit wrapping jam, when there are any print papers inside the fixing front paper sensor when turning on the power or after closing the upper
cover.
2.4.3.4.2 Door Open Jam
0007-4996
When the top cover is opened during a print operation, the main CPU determines a door open jam.
2.4.3.4.3 Residual Paper Jam
0007-4997
The CPU determines a residual paper jam under the following conditions:
- Power is turned on.
- Returned from the sleep status.
- Door is closed after a jam occurrence.
- Registration sensor (PS711) and fixing delivery sensor (PS1) detect paper.
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Chapter 2
2.4.4 Cassette Pickup Unit
2.4.4.1 Pickup from the Cassette
0008-2078
When the cassette is used as the source of paper, the machine operates as follows to make sure that a single sheet of paper is picked from the cassette:
1. When the SCNT board sends the pickup command, the DCNT board drives the main motor (DCM701) in response.
2. A specific period of time after the main motor (DCM701) starts to rotate, the cassette pickup solenoid (SL9) goes on.
3. The cassette pickup roller starts to rotate, thereby picking up paper and moving it to the inside of the machine.
4. The separation pad makes sure that no more than a single sheet of paper is picked up. The paper is then moved as far as the registration roller.
5. When the paper reaches the registration roller, the registration shutter makes sure that it is not askew. The paper is then moved at a speed suited to its type as
instructed by the SCNT board.
6. Thereafter, the ITB home position detection mechanism goes on, and the DCNT board turns on the registration clutch (CL1). As a result, the drive of the motor
(DCM701) reaches the registration roller, and the print paper is moved to the secondary transfer roller.
7. The DCNT board uses the secondary transfer roller shift mechanism to lock the secondary transfer roller to the ITB. At the same time, the roller shift clutch (CL2)
goes on so that the drive of the motor (DCM701) reaches the secondary transfer roller. The toner image on the ITB is then transferred to the print paper, which
thereafter is moved to the fixing/delivery assembly.
2.4.5 Manual Feed Pickup Unit
2.4.5.1 Multi-purpose Tray Pick-up
0007-4998
When printing from the multi-purpose tray, paper on it is fed into the printer one by one.
The following describes the multi-purpose tray pick-up operation:
1) When a print command is input from the SCNT Board, the DCNT Board drives the main motor (DCM701) to rotate the ITB.
2) Within a specified period after the start of the DCM701 rotation, the multi-purpose tray pick-up solenoid (SL92) goes on.
3) After a lifting plate for the multi-purpose tray has moved up, the multi-purpose tray pick-up roller starts to rotate. This allows paper on the tray to be fed into the
printer.
4) After a multiple-fed paper is removed with the separation pad, paper is sent to the registration roller.
5) After the skew of paper is corrected with the registration shutter, a feed speed is changed based on a paper type specified from the SCNT Board in feed speed
control.
6) Then, the SCNT Board let in the registration clutch (CL1) within a specified period in ITB home position detection function. This allows the drive of the DCM701
to transmit to the registration roller and paper to be fed to the secondary transfer roller.
7) The SCNT Board press the secondary transfer roller against the ITB in secondary transfer roller engaging control. Simultaneously, it lets in the roller-engaging
clutch (CL2). This allows the drive of the DCM701 to transmit to the secondary transfer roller. Toner is transferred onto paper on the ITB and paper is fed to
the fixing/delivery unit.
2.5 Fixing Unit
2.5.1 Overview/Configuration
2.5.1.1 Outline
0011-6403
This printer utilizes an on-demand fixing method which is configured as shown in the figure below.
T-2-7
- Heater:
One heater is utilized in the fixing unit.
Fixing heater (H1): For fixing film heating (ceramic heater)
- Thermistors:
Two thermistors are utilized in the fixing unit.
Main thermistor (TH1): For fixing heater temperature control (contact thermistor)
Sub thermistor (TH2): For fixing heater temperature rise detection at its end (contact thermistor)
- Thermoswitch:
One thermoswitch is placed on top of the fixing heater (non contact type). When the fixing
heater is abnormally overheated, the switch opens and cut off the power supply to the heater.
Fixing heater
Fixing sleeve unit
Power supply unit
DCNT board
Fixing
control
circuit
Fixing
heater
safety
circuit
Main thermistor
(TH1)
Sub thermistor
(TH2)
FIXING HEATER
DRIVE signal
FIXING TEMPERATURE DETECTION signal
IC101
CPU
Thermoswitch
(TP)
Fixing unit
Pressure roller
F-2-49
This control circuit has the following four controls and functions:
- Heater temperature control-Maintains the fixing heater at a specified temperature.
- Flicker prevention function-Prevents flicker caused by attaching lighting apparatuses to the power source to which the printer is connected.
- Protective function-Shuts off the power supply to the fixing heater when the heater is overheating.
- Failure detection-Monitors the abnormalities of the fixing unit and when an abnormality occurs, shuts off the heater and notifies it to the video controller.
2-34
Chapter 2
The controls and functions in the fixing control circuit are described next.
2.5.2 Various Control Mechanisms
2.5.2.1 Controlling the Temperature of the Fixing Unit
2.5.2.1.1 Heater Temperature Control
0011-6408
This function detects an abnormal temperature rise of the heater and shuts the heater off.
This printer utilizes three protective functions performed by the following parts, to prevent an abnormal temperature rise of the heater:
Fixing unit
Main
thermistor
(TH1)
Power supply unit
Fixing film
unit
Relay drive
circuit
RLD+
RLDFSRD
Thermoswitch
(TP)
DCNT Board
Zero cross ZEROX
detection circuit
RL301 +24V
Fixing heater
drive circuit
IC102
ASIC
99 98
RLD
Fixing heater
safety circuit
Sub thermistor
(TH2)
Fixing heater
(H1)
FSRTH2
FSRTH1
IC101
38 CPU
52
39
+3.3V
F-2-50
The fixing heater temperature is monitored by two thermistors: the main thermistor (TH1) and the
sub thermistor (TH2).
The TH1 is to control the print temperature and between-sheets temperature. It is placed contacting inside surface of the fixing sleeve and monitors the sleeve temperature. The TH2 is to control the start-up temperature. It is in contact with the fixing heater and detects the temperature rise at the end. As the surface temperature
of the fixing heater rises, the resistances of both thermistors reduce and the voltage of the FIXING HEATER TEMPERATURE DETECTION signals (FSRTH1,
FSRTH2) varies in analog form.
The CPU (IC101) in the DCNT board monitors the voltage of these two signals (FSRTH1,FSRTH2) and accordingly outputs the FIXING HEATER DRIVE signal
(FSRD). Based on this signal the fixing heater drive circuit controls and maintains the fixing heater at the specified temperature.
This control system is divided into the following five fixing sequences.
1) Start-up temperature control
This control is to determine the start-up temperature of the fixing heater according to its temperature (detected by TH2) upon energization. If the heater is energized
within 30 seconds after a print is completed, the start-up temperature is determined according to the last printing
temperature.
The fixing heater on for a specified time before it drives the feed motor if the heater temperature is below 55 deg C at the start of fixing heater drive (detected by
TH2). It drives the motor after the fixing heater is left on for the prescribed time period.
2) Print temperature control
This control is to maintain the fixing heater at the target temperature during printing. The CPU raises the target temperature in stages in one printing process to
prevent the temperature fall of the fixing sleeve as the paper goes through. The target temperature varies in stages depending on the number of print if continuous
printing and it differs depending on the color of print(monochrome or colors) and the media type.
3) Between-sheets temperature control
This control is to make the temperature of the fixing heater lower than the target temperature
during continuous printing to prevent the temperature rise of the fixing sleeve between sheets.
The between-sheets temperature varies depending on the distance between two sheets and media type.
4) Throughput control
This control is to prevent the overheating at both ends of fixing sleeve unit during continuous
printing of a narrow paper. For a continuous printing, this CPU decreases the throughput by extending the paper pick-up intervals if the sub thermistor reads over
270 deg C and the paper
width is narrower than 210mm, or the sub thermister reads over 280 deg C independent of the paper width.
2.5.3 Protection Function
2.5.3.1 Flicker prevention function
0008-1283
This function is utilized to prevent flicker caused by attaching lighting apparatuses to the ACÅ@power source to which the printer is connected.
The heater drive circuit uses a triac to switch AC power. If the user connects lighting apparatuses
to the power supply, to which the power connector is connected, the current flowing into theÅ@heater increases. This decreases the voltage level of the AC line
and results in flicker.
To prevent flicker, the printer utilizes a zero cross circuit that monitors the AC line voltage. The
CPU detects ZERO CROSS DETECTION (ZEROX) signal to optimize the timing to energize the heater.
2.5.3.2 Protective Function
This function detects an abnormal temperature rise of the heater and shuts the heater off.
This printer utilizes three protective functions performed by the following parts, to prevent an abnormal temperature rise of the heater:
1) CPU
2) Fixing heater safety circuit
3) Thermoswitch
0011-6412
Each protective function will be discussed in the following:
1) Protective function by the CPU
The CPU monitors the output voltages (FSRTH1, FSRTH2) of the main/sub thermistors. If the FSRTH1 is approx. 0.77 V or less (equivalent to 245 deg C or higher),
or the FSRTH2 is approx 2.9 V or higher (equivalent to 290 deg C or higher), the CPU determines a fixing unit failure and executes the following:
2-35
Chapter 2
1. Sets the FIXING HEATER DRIVE (FSRD) signal "L" through the ASIC and shuts off the heater.
2. Sets the RELAY DRIVE (RLD) signal "L" through the ASIC.
3. Sets the RELAY DRIVE (RLD-) signal "L" through the fixing heater safety circuit.
4. Turns off the relay (RL301) through the relay drive circuit and shuts off the heater.
2) Protective function by the fixing heater safety circuit
This circuit monitors the output voltages (FSRTH1, FSRTH2) of the main/sub thermistors.
When the FSRTH1 is approx. 0.5 V or less (equivalent to 280 deg C or higher), or the FSRTH2 is approx 3.0 V or higher (equivalent to 315 deg C or higher), the
relay (RL301) is turned off and the heater is shut off.
3) Protective function by the thermoswitch
The thermoswitch (TP) gets disconnected to interrupt the current to the fixing heater when it
reads the temperature of over 250 deg C (Note) due to an abnormal temperature rise of the fixing
heater.
The thermoswitch is placed away from the fixing heater. The actual temperature of the fixing heater is higher than the thermoswitch reading.
2.5.3.3 Fixing Unit Failure Detection
0011-6413
The CPU determines fixing unit failures under the following conditions 1) - 3), turns off the relay (RL301), shuts off the heater, simultaneously notifies the failure
to the SCNT board:
1) Abnormal high temperature
* Abnormal high temperature on the main thermistor
If the main thermistor continuously reads 245 deg C or higher for minimum 1 second, the CPU judges
it abnormally high.
* Abnormal high temperature on the sub thermistor
If the sub thermistor continuously reads 290 deg C or higher for minimum 1.5 seconds, the CPU judges it abnormally high.
2) Abnormal low temperature
* Low temperature during temperature control
If the main thermistor continuously detects below 100 deg C for minimum 1 second during the print
temperature control and between-sheets temperature control, the CPU judges it abnormal.
* Abnormal low temperature on the sub thermistor
If the sub thermistor continuously reads below 75 deg C for minimum 2 seconds after 20 seconds from when the heater is energized, the CPU judges it abnormal.
* Break during start-up in the sub thermistor
If the sub thermistor continuously reads below 40 deg C for minimum 1 second after the heater is
energized, the CPU judges that the sub thermistor has a break.
* Break in the main thermistor
If the main thermistor continuously reads below 40 deg C for minimum 0.5 second after the start-up
temperature control, the CPU judges that the main thermistor has a break.
* Break in the sub thermistor
If the sub thermistor continuously reads below 40 deg C for minimum 0.5 second after the start-up
temperature control, the CPU judges that the sub thermistor has a break.
3) Start-up abnormality
* Start-up abnormality 1
If the main thermistor continuously reads below 120 deg C for minimum 1 second after 20 seconds
from when the heater is energized, the CPU judges it abnormal.
* Start-up abnormality 2
If the main thermistor reading never exceeds 5 deg C below the target temperature of temperature
control within 75 seconds from when the heater is energized, the CPU judges it abnormal.
2.6 Engine Control System
2.6.1 Construction
2.6.1.1 Overview
0008-1724
The printer control system controls the laser exposure system, image formation system, pickup/feed system, delivery system, fixing system, and control system.
The printer control system consists of 2 boards: DCNT board and SCNT board.
The following is a block diagram of the printer control system; a brief description of individual circuits follow:
Print Control System Block Diagram
Laser exposure system
Printer control system
Image formation system
SCNT
board
DCNT
board
Pickup/feed, delivery system
Fixing system
Externals and controls system
F-2-51
2-36
Chapter 2
2.6.2 DC Controller (DCNT)
2.6.2.1 Outline
0008-1725
The DCNT Board, which is controlled by the CPU in it, controls operation sequences for the printer.
When the power is turned on and DC power is supplied from the power supply unit to the DCNT Board PCB, the CPU starts to control the operations of the printer.
Then, when the printer enters the standby status, the CPU drives loads such as the laser diodes, motors, solenoids, etc. based on a print command and image data
input from the interface controller.
DCNT Board
Toner cartridge
×4
Memory tag
Laser/scanner unit
H.V.T,
Scanner
motor
Sub-H.V.T
Drum cartridge
/BDI
Memory tag
BD circuit
Main motor
IC 102
Laser driver
ASIC
Switch × 1
Sensors × 8
SCNT Board
Solenoids × 2
Clutches × 2
250-sheet
paper feeder
(option)
Power supply unit
Fixing unit
Fixing
control circuit
IC105
Reset IC
AC input
+3.3V
Low-voltage
+5V
power supply
+24V
circuit
/RESET
IC109
Non-volatile memory
Developing
rotary motor
IC103
Developing rotary
motor driver IC
IC 101
Toner
cartridge
motor
IC104
Toner cartridge
motor driver IC
Fixing motor
IC 106
Fixing motor
driver IC
Engaging
motor
IC 107
Engaging motor
driver IC
Cooling fan
CPU
Internal
temperature
detection
thermistor
: AC line
: Multiple control lines
:Single control line
Fan motor
control circuit
F-2-52
2.6.2.2 Operations
0008-1726
a. CPU (IC101)
A 16-bit single-chip microcomputer is used for a CPU. It has a built-in ROM and RAM. It controls the following operations according to a program stored in the
ROM:
1) Printer engine sequence control
2) Drive controls for the developing rotary motor, toner cartridge motor, fixing motor, engaging motor
3) Drive control for the cooling fan
4) Internal temperature detection thermistor control
5) Reading/writing to the non-volatile memory
b. ASIC (IC102)
The ASIC (Application Specific IC) is an IC used for interface of IC, memory, external device, etc. It controls the following operations according to the CPU:
1) Laser/scanner control
2) Control of communications with the interface controller
3) Power supply unit (fixing control circuit, low-voltage power supply circuit) control
4) High-voltage power supply PCB control
5) Drive control for the main motor
6) Sensor/switch controls
7) Clutch/solenoid controls
8) Reading/writing to the memory tag
9) 250-sheet paper feeder (option) control
c. Reset IC (IC105)
It monitors +3.3 V and resets the CPU and ASIC when the power is turned on.
d. Non-volatile memory (IC109)
It stores backup data.
2-37
Chapter 2
e. Developing rotary motor driver IC (IC103)
It controls the developing rotary motor.
f. Toner cartridge motor driver IC (IC104)
It controls the toner cartridge motor.
g. Fixing motor driver IC (IC106)
It controls the fixing motor.
h. Engaging motor driver IC (IC107)
It controls the engaging motor.
i. Fan motor control circuit
It controls the cooling fan motor.
2.6.2.3 Controlling the Motors and Fans
0011-6414
The machine uses several motors, consisting of 5 DC motors and 4 stepping motors.
Of the DC motors, one is used in the reader system, one for the image formation system, and two for the image formation/paper feed system, with the remaining
one used as a fan motor serving to cool the inside of the machine. As for the stepping motors, 2 are used in the reader system, another 2 are used in the image
formation system.
The machine is designed to deposit toners of different colors on its intermediate transfer belt. It is important that all these deposits fall at exact points, and minute
changes in the speed of motors can well cause displacement of resulting colors. The machine's DC motor used for image formation, for this reason, is controlled to
an extremely high level of accuracy for its rotation speed.
T-2-8
Name
Functions
Main motor
(DCM701)
Type
Direction of
rotation
Speed
Fault detection
drives the following:
DC motor
multifeeder pickup roller,
registration roller,
photosensitive drum,
secondary transfer roller,
ITB, feed belt, holding plate,
waste toner feedscrew
normal
3-speed
control
yes
Developing
rotary motor
(DCM703)
drives the developing rotary
DC motor
normal
1-speed
control
yes
Fixing motor
(PM702)
drives the pressure roller,
face-down delivery roller
DC motor
normal
3-speed
control
yes
full speed, 1/
2 speed
full speed, 1/
2 speed
Shift motor
(PM704)
locks and unlocks the
developing cylinder to and
from the photosensitive
drum; locks and unlocks the
memory tag contact (toner
cartridge) and the machine
contact
stepping
motor
normal/reverse
1-speed
control
no
Toner
cartridge
motor
(PM705)
drives the developing
cylinder, toner stirring plate
stepping
motor
normal
1-speed
control
no
Cooling fan
(FM721)
cools the areas near the fixing DC motor
assembly, low-voltage power
supply, high-voltage power
supply, cartridge
-
1-speed
control
yes
Document feed drives the various rollers of
motor
the ADF
(DCM706)
stepping
motor
normal
1-speed
control
no
Flatbed motor
(DCM707)
drives the CCD unit
stepping
motor
normal/reverse
1-speed
control
no
Reader
Cooling fan
(FM722)
serves as the reader unit
cooling fan
DC motor
-
1-speed
control
no
2.6.2.4 Main Motor Control
0008-1728
This control is utilized to drive the main motor (DCM701).
The DCM701, a three-phase, eight-pole DC motor with a built-in drive circuit, drives each roller used for paper feed and image formation.
The DCNT Board drives the motor by controlling the MAIN MOTOR ACCELERATION (/MAIMACC) signal and MAIN MOTOR DECELERATION (/MAIMDEC) signal.
The illustration below shows the control circuit of the motor.
2-38
Chapter 2
DCNT Board
Main motor
+24VB
CPU
(IC101)
J110-8 +24VB J701-1
DCM701
-5 /MAIMACC -4
ASIC
(IC102)
M
-6 /MAIMDEC -3
+3.3V
-7 MAIMFG
-2
-4
-5
24VGND
F-2-53
The operations of the main motor are discussed next.
The CPU in the DCNT Board rotates the motor by setting the /MAIMACC signal "L" through the ASIC.
The CPU monitors the MAIN MOTOR SPEED DETECTION (MAIMFG) signal. The CPU out-puts the /MAIMACC signal when the motor does not reach specified revs, and outputs the/MAIMDEC signal when it exceeds a specified rev. Then, the CPU controls these signals to adjust the motor revs to a specified value.
The CPU determines a main motor failure, then stops the printer engine, and notifies the failure to the video controller, under the following conditions:
1) The period of the MAIMFG signal does not satisfy a specified period within 100 ms after the start of main motor drive.
2) The period of the MAIMFG signal goes out of a specified period continuously for more than 1 seconds after it once reaches the value.
2.6.2.5 Developing Rotary Motor Control
0008-1729
This control is utilized to drive the developing rotary motor (DCM703).
The DCM703, a three-phase, eight-pole DC motor with a built-in encoder, drives the developing rotary.
The DCNT Board drives the motor by controlling the DEVELOPING ROTARY MOTOR ON (ROTMON) signal and DEVELOPING ROTARY SPEED CONTROL (/ROTMPWM) signal.
The illustration below shows the control circuit of the motor.
Developing rotary motor
DCNT Board
+5V +24VA
FU103
ROTMON
/ROTMPWM
Developing
rotary motor
driver
(IC103)
DCM703
J105-5 to -8
M
DEVELOPING ROTARY
MOTOR DRIVE signal
J105-3 ENCSNS1
Encoder
-2 ENCSNS2
CPU
(IC101)
Developing rotary
Bk
Y
C
M
Home position flag
+3.3V
J126-1
+3.3V
-4
ROTHPS
Developing rotary
home position
sensor
(PS51)
Developing rotary/toner level
detection circuit
F-2-54
1) When the CPU cannot detect ENCODER DETECTION signal within 5 seconds after the start of the developing rotary motor drive.
2-39
Chapter 2
2) When the pulse count for ENCODER DETECTION signal does not fit in the prescribed range, (within -/+ 200 of a targeted pulse count memorized by CPU
)after a period of time from the start of the drive when the developing rotary motor becomes Ready.
The encoder used in this printer consists of a disk, reflective sensor, and detection unit. The disk is installed on the motor shaft. The disk rotates as the motor does.
The disk has reflective areas and interrupting areas alternately located on its surface. The sensor strikes light to the rotating disk and sends the monitoring results
of the reflected light to the detection unit. The detection unit monitors the results constantly. It generates the two ENCODER DETECTION (ENCSNS1, ENCSNS2)
signals based on the tim-ing of detecting the reflective and interrupting areas on the disk and sends the signals to the DC controller.
ROTHPS
Start of ENCODER DETECTION
signal monitoring
ENCSNS1
T
(Normal speed)
Motor
shaft
T
ENCSNS2
Disk
ENCSNS1
Reflecting
areas
Reflective
sensor Sensor output
Interrupting
areas
Delayed
Delayed
(Slow)
ENCSNS2
ENCSNS1
Detection
unit
Hastened
(Fast)
Hastened
ENCSNS2
ENCSNS2 ENCSNS1
F-2-55
2.6.2.6 Cooling Fan
0008-1730
The Cooling fan, a DC brushless motor with a built-in Hall device, cools off around the fixing unit, power supply unit, high-voltage power supply PCB, and cartridge.
The CPU (IC101) controls the cooling fan.
The CPU outputs the FAN DRIVE (FAN1D) signal after receiving a print command from the interface controller and rotates the cooling fan. After the completion
of a print operation, the CPU rotates the fan for a specified period based on internal temperature by monitoring the internal temperature detection thermistor (TH3).
Then it stops the fan.(Refer to the table below)
The CPU monitors the FAN LOCK DETECTION (/FAN1S) signal while the cooling fan is rotating. If the signal remains "H" continuously for more than 10 seconds, the CPU determines a fan failure, then stops the printer engine, and notifies the failure to the interface controller.
DCNT board
+24VB
IC101
CPU
J123
-1 FAN1D
Fan motor
control circuit
-3 /FAN1S
J137
-1
FM721
Internal temperature
detection thermistor
SLVTH
F-2-56
T-2-9
2-40
Cooling fan
Thermistor detection temparature (deg C)
Fan rotation time (s)
44 or less
0
45 to 49
30
50 or more
300
TH3
Chapter 2
2.6.3 System Controller (SCNT)
2.6.3.1 Outline
0008-2317
The following is the functional composition of the SCNT board:
LAN
CCD
USB
IC1002
JUSB1
SuperC Unit
JLAN1
JBAT1
IC301
IC1001
JETM1
JLBP1
DCNT
Borad
CCD
IC1101
IC502
IC1201
IC1
IC501
IC3
BATTERY
JNCU1
JPSU1
IC2
+24V
+13.5V
+5V
+3.3V
IC601
JFAN1
IC701
IC651
JAMTR1 JBMTR1 JSPK1
FAN
Book
Motor
NCU Borad
IC801
JSNS1
ADF Speaker Sensor
Motor
JNCU2
NCU Borad
JOP701
JOP702
control panel controller
F-2-57
T-2-10
IC
Function
IC1
CPU (ASIC)
DRAM controller, image processing block, USB controller, LAN controller, reader unit control
IC2
FLASH ROM
program control, data retention
IC3
FLASH ROM
program control, data retention
IC301
LAN control
IC501
DDR memory
IC502
DDR memory
IC601
ADF motor driver
IC651
book mode motor driver
IC701
control panel controller
IC801
fax modem
IC1001
image processing controller
IC1002
flash ROM for image processing data storage
IC1101
ASIC for recording signal control
IC1201
clock IC communication block, recording signal processing block, image signal processing block
T-2-11
JackÅ@No.
Function
JLBP1
DCNT board connector
JUSB1
USB terminal
JLAN1
LAN cable terminal
JETM1
not used
JBAT1
capacitor terminal
JPSU1
power board connection
JFAN1
fan connection
JAMTR1
CCD motor connection
JBMTR1
ADF, motor connection
JSPK1
speaker connection
JSNS1
power sensor/post-separation sensor
JOP701
control panel connection
JOP702
control panel connection
JNCU1
NCU board connection
2.6.3.2 Canon Advanced Printing TechnologyÅ@(CARPS)
0008-2319
Canon Advanced Raster Printing System (hereafter (CARPS) refers to a system of processing data in which printing speed is reduced and operation is made easier
for more user-friendly printing in a Microsoft Windows environment. In CARPS, the following takes place so as to generate output as fast and as easily as possible:
- Instead of converting the print data coming from the application into the printer's page description language (PDL), it turns it into resource data which is GDI-
2-41
Chapter 2
compatible.
- It turns the resulting GDI-compatible source data into dot matrix data on the host computer and sends the result to the host computer.
- It allows making selections to set up a printing environment using dialog boxes on the host computer.
Host computer
GDI data from application
Converts data into GDIcompatible resource data
Canon Advanced Raster Printing System
Analyzes resource data,
and develops it into print
data
Displays on screen
Creates bitmap image
Monitors state of printer
Host computer interface
Printer interface
Engine
Printer status information
Printing
Printer
F-2-58
- It indicates the status of the printer on the screen of the host computer, enabling a check on the end of printing, feed of print paper, and error status using the host
computer screen.
Graphics Device Interface (GDI)
It is a graphics drawing system of processing data that prints or displays images in a Windows environment (or an interface of a graphics system used in conjunction
with an application).
CARPS is sued after installing it to a Microsoft Windows 2000/XP or 98/Me environment. Use the CD-ROM that comes with the machine for installation.
In CARPS, the paper size, original size, number of prints to make, and settings related to print quality are all specified on a computer screen. The way these settings
are made differ between Microsoft Windows 2000/XP and 98/Me.
2-42
Chapter 3 DISASSEMBLY AND ASSEMBLY
Contents
Contents
3.1 Cartridge Removal at Trouble Eruption Cartridge Removal at Trouble Eruption ........................................................3-1
3.1.1 Cartridge Removal at Trouble Eruption ...................................................................................................................................... 3-1
3.1.2 Toner cartridge removal............................................................................................................................................................... 3-1
3.1.3 Drum cartridge removal ............................................................................................................................................................... 3-2
3.2 EXTERNAL AND CONTROLS SYSTEM ..................................................................................................................3-2
3.2.1 Front Cover .................................................................................................................................................................................. 3-2
3.2.1.1 Removing the Cassettes ..................................................................................................................................................................................3-2
3.2.1.2 Removing the Rear Cover ...............................................................................................................................................................................3-2
3.2.1.3 Removing the Right Cover (with the reader assembly intact) ........................................................................................................................3-2
3.2.1.4 Removing the Left Cover (with the reader assembly intact) ..........................................................................................................................3-3
3.2.1.5 Removing the Lower Front Cover ..................................................................................................................................................................3-4
3.2.1.6 Removing the Front Cover..............................................................................................................................................................................3-4
3.2.2 Rear Cover ................................................................................................................................................................................... 3-4
3.2.2.1 Removing the Rear Cover ...............................................................................................................................................................................3-4
3.2.3 Top Cover .................................................................................................................................................................................... 3-5
3.2.3.1 Removing the Cassettes ..................................................................................................................................................................................3-5
3.2.3.2 Removing the Rear Cover ...............................................................................................................................................................................3-5
3.2.3.3 Removing the Reader Assembly .....................................................................................................................................................................3-5
3.2.3.4 Removing the Right Cover..............................................................................................................................................................................3-6
3.2.3.5 Removing the Left Cover................................................................................................................................................................................3-6
3.2.3.6 Removing the Power Supply Assembly..........................................................................................................................................................3-6
3.2.3.7 Removing the Face-Down Cover....................................................................................................................................................................3-6
3.2.3.8 Removing the Top Cover ................................................................................................................................................................................3-7
3.2.4 Right Cover .................................................................................................................................................................................. 3-8
3.2.4.1 Removing the Cassettes ..................................................................................................................................................................................3-8
3.2.4.2 Removing the Rear Cover ...............................................................................................................................................................................3-8
3.2.4.3 Removing the Right Cover (with the reader assembly intact) ........................................................................................................................3-8
3.2.5 Left Cover .................................................................................................................................................................................... 3-9
3.2.5.1 Removing the Cassettes ..................................................................................................................................................................................3-9
3.2.5.2 Removing the Rear Cover ...............................................................................................................................................................................3-9
3.2.5.3 Removing the Left Cover (with the reader assembly intact) ..........................................................................................................................3-9
3.2.6 Upper Right Cover ..................................................................................................................................................................... 3-10
3.2.6.1 Removing the Rear Cover .............................................................................................................................................................................3-10
3.2.6.2 Removing the Reader Assembly ...................................................................................................................................................................3-10
3.2.6.3 Removing the Scanner Unit ..........................................................................................................................................................................3-11
3.2.6.4 Removing the Upper Right Cover.................................................................................................................................................................3-11
3.2.7 Upper Left Cover ....................................................................................................................................................................... 3-11
3.2.7.1 Removing the Rear Cover .............................................................................................................................................................................3-11
3.2.7.2 Removing the Reader Assembly ...................................................................................................................................................................3-12
3.2.7.3 Removing the Scanner Unit ..........................................................................................................................................................................3-13
3.2.7.4 Removing the Upper Left Cover...................................................................................................................................................................3-13
3.2.8 Face-up cover............................................................................................................................................................................. 3-13
3.2.8.1 Removing the Fixing Assembly....................................................................................................................................................................3-13
3.2.8.2 Removing the Face-Up Cover.......................................................................................................................................................................3-13
3.2.9 Main Drive Unit ......................................................................................................................................................................... 3-13
3.2.9.1 Removing the Rear Cover .............................................................................................................................................................................3-13
3.2.9.2 Removing the Reader Assembly ...................................................................................................................................................................3-14
3.2.9.3 Removing the Right Cover............................................................................................................................................................................3-15
3.2.9.4 Removing the Left Cover..............................................................................................................................................................................3-15
3.2.9.5 Removing the Power Supply Assembly........................................................................................................................................................3-15
3.2.9.6 Removing the Face-Down Cover..................................................................................................................................................................3-15
3.2.9.7 Removing the Top Cover ..............................................................................................................................................................................3-15
3.2.9.8 Removing the Right Frame ...........................................................................................................................................................................3-17
3.2.9.9 Removing the Inside Cover...........................................................................................................................................................................3-17
Contents
3.2.9.10 Removing the Shield Plate.......................................................................................................................................................................... 3-17
3.2.9.11 Removing the Registration Clutch.............................................................................................................................................................. 3-17
3.2.9.12 Removing the Main Drive Assembly ......................................................................................................................................................... 3-17
3.2.10 Operation Panel Unit................................................................................................................................................................ 3-18
3.2.10.1 Removing the Rear Cover........................................................................................................................................................................... 3-18
3.2.10.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-18
3.2.10.3 Removing the operation Panel .................................................................................................................................................................... 3-18
3.2.11 SCNT Board............................................................................................................................................................................. 3-19
3.2.11.1 Removing the Rear Cover........................................................................................................................................................................... 3-19
3.2.11.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-19
3.2.11.3 Removing the Board Unit ........................................................................................................................................................................... 3-19
3.2.11.4 Removing the SCNT Unit........................................................................................................................................................................... 3-20
3.2.12 DCNT Board............................................................................................................................................................................ 3-21
3.2.12.1 Removing the Rear Cover........................................................................................................................................................................... 3-21
3.2.12.2 Removing the Reader Assembly................................................................................................................................................................. 3-22
3.2.12.3 Removing the Right Cover ......................................................................................................................................................................... 3-22
3.2.12.4 Removing the Left Cover ........................................................................................................................................................................... 3-23
3.2.12.5 Removing the Power Supply Assembly ..................................................................................................................................................... 3-23
3.2.12.6 Removing the Face-Down Cover ............................................................................................................................................................... 3-23
3.2.12.7 Removing the Top Cover............................................................................................................................................................................ 3-23
3.2.12.8 Removing the Right Frame......................................................................................................................................................................... 3-24
3.2.12.9 Removing the Shield Plate.......................................................................................................................................................................... 3-24
3.2.12.10 Removing the DCNT Board ..................................................................................................................................................................... 3-25
3.2.13 NCU Board .............................................................................................................................................................................. 3-25
3.2.13.1 Removing the Rear Cover........................................................................................................................................................................... 3-25
3.2.13.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-25
3.2.13.3 Removing the Modular Board Cover.......................................................................................................................................................... 3-26
3.2.13.4 Removing the NCU Board.......................................................................................................................................................................... 3-26
3.2.14 Modular Board ......................................................................................................................................................................... 3-26
3.2.14.1 Removing the Rear Cover........................................................................................................................................................................... 3-26
3.2.14.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-26
3.2.14.3 Removing the Modular Board Cover.......................................................................................................................................................... 3-27
3.2.14.4 Removing the Modular PCB....................................................................................................................................................................... 3-27
3.2.15 Power Supply PCB .................................................................................................................................................................. 3-27
3.2.15.1 Removing the Rear Cover........................................................................................................................................................................... 3-27
3.2.15.2 Removing the Reader Assembly................................................................................................................................................................. 3-27
3.2.15.3 Removing the Power Supply Assembly ..................................................................................................................................................... 3-28
3.2.15.4 Removing the Power Supply PCB.............................................................................................................................................................. 3-28
3.2.16 Print Power Supply PCB.......................................................................................................................................................... 3-29
3.2.16.1 Removing the Fixing Assembly ................................................................................................................................................................. 3-29
3.2.16.2 Removing the Rear Cover........................................................................................................................................................................... 3-29
3.2.16.3 Removing the Reader Assembly................................................................................................................................................................. 3-29
3.2.16.4 Removing the Right Cover ......................................................................................................................................................................... 3-30
3.2.16.5 Removing the Left Cover ........................................................................................................................................................................... 3-30
3.2.16.6 Removing the Power Supply Assembly ..................................................................................................................................................... 3-30
3.2.16.7 Removing the Face-Down Cover ............................................................................................................................................................... 3-31
3.2.16.8 Removing the Top Cover............................................................................................................................................................................ 3-31
3.2.16.9 Removing the Right Frame......................................................................................................................................................................... 3-32
3.2.16.10 Removing the Left Frame ......................................................................................................................................................................... 3-32
3.2.16.11 Removing the Cassette Feeder.................................................................................................................................................................. 3-32
3.2.16.12 Removing the Shield Plate........................................................................................................................................................................ 3-32
3.2.16.13 Removing the Fan Duct ............................................................................................................................................................................ 3-32
3.2.16.14 Removing the Lower Case Assembly....................................................................................................................................................... 3-33
3.2.16.15 Removing the Printer Power Supply PCB ................................................................................................................................................ 3-33
3.2.17 High-voitage Power Supply PCB ............................................................................................................................................ 3-33
3.2.17.1 Removing the Fixing Assembly ................................................................................................................................................................. 3-33
3.2.17.2 Removing the Rear Cover........................................................................................................................................................................... 3-34
3.2.17.3 Removing the Reader Assembly................................................................................................................................................................. 3-34
3.2.17.4 Removing the Right Cover ......................................................................................................................................................................... 3-35
3.2.17.5 Removing the Left Cover ........................................................................................................................................................................... 3-35
3.2.17.6 Removing the Power Supply Assembly ..................................................................................................................................................... 3-35
Contents
3.2.17.7 Removing the Face-Down Cover................................................................................................................................................................3-36
3.2.17.8 Removing the Top Cover ............................................................................................................................................................................3-36
3.2.17.9 Removing the Right Frame .........................................................................................................................................................................3-37
3.2.17.10 Removing the Left Frame .........................................................................................................................................................................3-37
3.2.17.11 Removing the Cassette Feeder ..................................................................................................................................................................3-37
3.2.17.12 Removing the Shield Plate ........................................................................................................................................................................3-37
3.2.17.13 Removing the Fan Duct ............................................................................................................................................................................3-37
3.2.17.14 Removing the Lower Case Assembly .......................................................................................................................................................3-38
3.2.17.15 Removing the Sub High-Voltage Power Supply PCB Unit......................................................................................................................3-38
3.2.17.16 Removing the High-Voltage Power Supply PCB .....................................................................................................................................3-38
3.2.18 Sub High-Voltage Power Supply PCB .................................................................................................................................... 3-38
3.2.18.1 Removing the Fixing Assembly..................................................................................................................................................................3-38
3.2.18.2 Removing the Rear Cover ...........................................................................................................................................................................3-39
3.2.18.3 Removing the Reader Assembly .................................................................................................................................................................3-39
3.2.18.4 Removing the Right Cover..........................................................................................................................................................................3-40
3.2.18.5 Removing the Left Cover............................................................................................................................................................................3-40
3.2.18.6 Removing the Power Supply Assembly......................................................................................................................................................3-40
3.2.18.7 Removing the Face-Down Cover................................................................................................................................................................3-41
3.2.18.8 Removing the Top Cover ............................................................................................................................................................................3-41
3.2.18.9 Removing the Right Frame .........................................................................................................................................................................3-42
3.2.18.10 Removing the Left Frame .........................................................................................................................................................................3-42
3.2.18.11 Removing the Cassette Feeder ..................................................................................................................................................................3-42
3.2.18.12 Removing the Shield Plate ........................................................................................................................................................................3-42
3.2.18.13 Removing the Fan Duct ............................................................................................................................................................................3-42
3.2.18.14 Removing the Lower Case Assembly .......................................................................................................................................................3-43
3.2.18.15 Removing the Sub High-voltage Power Supply Board.............................................................................................................................3-43
3.2.19 Internal Temperature Detection Thermistor ............................................................................................................................ 3-43
3.2.19.1 Removing the Rear Cover ...........................................................................................................................................................................3-43
3.2.19.2 Removing the Reader Assembly .................................................................................................................................................................3-44
3.2.19.3 Removing the Right Cover..........................................................................................................................................................................3-44
3.2.19.4 Removing the Left Cover............................................................................................................................................................................3-45
3.2.19.5 Removing the Power Supply Assembly......................................................................................................................................................3-45
3.2.19.6 Removing the Face-Down Cover................................................................................................................................................................3-45
3.2.19.7 Removing the Top Cover ............................................................................................................................................................................3-45
3.2.19.8 Removing the Right Frame .........................................................................................................................................................................3-46
3.2.19.9 Removing the Shield Plate ..........................................................................................................................................................................3-46
3.2.19.10 Removing the Machine Inside Temperature Thermistor ..........................................................................................................................3-47
3.2.20 Cooling Fan.............................................................................................................................................................................. 3-47
3.2.20.1 Removing the Rear Cover ...........................................................................................................................................................................3-47
3.2.20.2 Removing the Reader Assembly .................................................................................................................................................................3-47
3.2.20.3 Removing the Right Cover..........................................................................................................................................................................3-48
3.2.20.4 Removing the Left Cover............................................................................................................................................................................3-48
3.2.20.5 Removing the Power Supply Assembly......................................................................................................................................................3-49
3.2.20.6 Removing the Face-Down Cover................................................................................................................................................................3-49
3.2.20.7 Removing the Top Cover ............................................................................................................................................................................3-49
3.2.20.8 Removing the Left Frame ...........................................................................................................................................................................3-50
3.2.20.9 Removing the Fan Duct ..............................................................................................................................................................................3-50
3.2.20.10 Removing the Cooling Fan .......................................................................................................................................................................3-50
3.3 Document Feed/Exposure System ...............................................................................................................................3-51
3.3.1 Scanner Unit............................................................................................................................................................................... 3-51
3.3.1.1 Removing the Rear Cover .............................................................................................................................................................................3-51
3.3.1.2 Removing the Scanner Unit ..........................................................................................................................................................................3-51
3.3.2 ADF Unit ................................................................................................................................................................................... 3-51
3.3.2.1 Removing the Rear Cover .............................................................................................................................................................................3-51
3.3.2.2 Removing the Scanner Unit ..........................................................................................................................................................................3-52
3.3.2.3 Removing the SCNT Board Unit ..................................................................................................................................................................3-52
3.3.2.4 Removing the ADF Unit ...............................................................................................................................................................................3-52
3.3.2.5 Points to Note When Mounting the ADF Unit..............................................................................................................................................3-53
3.3.3 Scanner Cover Unit.................................................................................................................................................................... 3-53
3.3.3.1 Removing the Rear Cover .............................................................................................................................................................................3-53
3.3.3.2 Removing the Scanner Unit ..........................................................................................................................................................................3-53
Contents
3.3.3.3 Removing the SCNT Board Unit.................................................................................................................................................................. 3-54
3.3.3.4 Removing the ADF Unit............................................................................................................................................................................... 3-54
3.3.3.5 Removing the operation Panel ...................................................................................................................................................................... 3-54
3.3.3.6 Removing the Scanner Cover Unit ............................................................................................................................................................... 3-55
3.3.4 CCD Unit ................................................................................................................................................................................... 3-55
3.3.4.1 Removing the Rear Cover............................................................................................................................................................................. 3-55
3.3.4.2 Removing the Scanner Unit .......................................................................................................................................................................... 3-55
3.3.4.3 Removing the NCU Board............................................................................................................................................................................ 3-56
3.3.4.4 Removing the SCNT Board Unit.................................................................................................................................................................. 3-56
3.3.4.5 Removing the ADF Unit............................................................................................................................................................................... 3-56
3.3.4.6 Removing the operation Panel ...................................................................................................................................................................... 3-57
3.3.4.7 Removing the Scanner Cover Unit ............................................................................................................................................................... 3-57
3.3.4.8 Removing the Flat Bed Motor Unit .............................................................................................................................................................. 3-57
3.3.4.9 Removing the CCD Unit............................................................................................................................................................................... 3-57
3.3.5 Separation Guide Unit................................................................................................................................................................ 3-57
3.3.5.1 Removing the Rear Cover............................................................................................................................................................................. 3-57
3.3.5.2 Removing the Scanner Unit .......................................................................................................................................................................... 3-58
3.3.5.3 Removing the SCNT Board Unit.................................................................................................................................................................. 3-58
3.3.5.4 Removing the ADF Unit............................................................................................................................................................................... 3-58
3.3.5.5 Points to Note When Mounting the ADF Unit ............................................................................................................................................. 3-59
3.3.5.6 Removing the Document Pickup Roller Unit ............................................................................................................................................... 3-59
3.3.5.7 Removing the Separation guide unit............................................................................................................................................................. 3-60
3.3.6 Feed Roller................................................................................................................................................................................. 3-60
3.3.6.1 Removing the Rear Cover............................................................................................................................................................................. 3-60
3.3.6.2 Removing the Scanner Unit .......................................................................................................................................................................... 3-60
3.3.6.3 Removing the SCNT Board Unit.................................................................................................................................................................. 3-61
3.3.6.4 Removing the ADF Unit............................................................................................................................................................................... 3-61
3.3.6.5 Points to Note When Mounting the ADF Unit ............................................................................................................................................. 3-61
3.3.6.6 Removing the Document feed roller............................................................................................................................................................. 3-61
3.3.7 Pickup Roller Unit ..................................................................................................................................................................... 3-63
3.3.7.1 Removing the Rear Cover............................................................................................................................................................................. 3-63
3.3.7.2 Removing the Scanner Unit .......................................................................................................................................................................... 3-63
3.3.7.3 Removing the SCNT Board Unit.................................................................................................................................................................. 3-63
3.3.7.4 Removing the ADF Unit............................................................................................................................................................................... 3-64
3.3.7.5 Points to Note When Mounting the ADF Unit ............................................................................................................................................. 3-64
3.3.7.6 Removing the Document Pickup Roller Unit ............................................................................................................................................... 3-64
3.3.8 Reader Unit ................................................................................................................................................................................ 3-65
3.3.8.1 Removing the Rear Cover............................................................................................................................................................................. 3-65
3.3.8.2 Removing the Reader Assembly................................................................................................................................................................... 3-65
3.3.9 Flatbed Motor Unit .................................................................................................................................................................... 3-66
3.3.9.1 Removing the Rear Cover............................................................................................................................................................................. 3-66
3.3.9.2 Removing the Scanner Unit .......................................................................................................................................................................... 3-67
3.3.9.3 Removing the SCNT Board Unit.................................................................................................................................................................. 3-67
3.3.9.4 Removing the ADF Unit............................................................................................................................................................................... 3-67
3.3.9.5 Removing the operation Panel ...................................................................................................................................................................... 3-68
3.3.9.6 Removing the Scanner Cover Unit ............................................................................................................................................................... 3-68
3.3.9.7 Removing the Flat Bed Motor Unit .............................................................................................................................................................. 3-68
3.3.10 Document Feed Motor ............................................................................................................................................................. 3-68
3.3.10.1 Removing the Rear Cover........................................................................................................................................................................... 3-68
3.3.10.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-69
3.3.10.3 Removing the SCNT Board Unit................................................................................................................................................................ 3-69
3.3.10.4 Removing the ADF Unit............................................................................................................................................................................. 3-69
3.3.10.5 Points to Note When Mounting the ADF Unit ........................................................................................................................................... 3-70
3.3.10.6 Removing the Document feed motor.......................................................................................................................................................... 3-70
3.3.11 DS Sensor................................................................................................................................................................................. 3-70
3.3.11.1 Removing the ADF Paper Sensor ............................................................................................................................................................... 3-70
3.3.12 DES Sensor .............................................................................................................................................................................. 3-71
3.3.12.1 Removing the ADF Feed Sensor ................................................................................................................................................................ 3-71
3.3.13 Speaker..................................................................................................................................................................................... 3-71
3.3.13.1 Removing the Rear Cover........................................................................................................................................................................... 3-71
3.3.13.2 Removing the Scanner Unit ........................................................................................................................................................................ 3-72
Contents
3.3.13.3 Removing the SCNT Board Unit ................................................................................................................................................................3-72
3.3.13.4 Removing the Speaker ................................................................................................................................................................................3-72
3.4 LASER EXPOSURE SYSTEM...................................................................................................................................3-72
3.4.1 Laser/Scanner Unit..................................................................................................................................................................... 3-72
3.4.1.1 Removing the Rear Cover .............................................................................................................................................................................3-72
3.4.1.2 Removing the Reader Assembly ...................................................................................................................................................................3-73
3.4.1.3 Removing the Right Cover............................................................................................................................................................................3-74
3.4.1.4 Removing the Left Cover..............................................................................................................................................................................3-74
3.4.1.5 Removing the Power Supply Assembly........................................................................................................................................................3-74
3.4.1.6 Removing the Face-Down Cover..................................................................................................................................................................3-74
3.4.1.7 Removing the Top Cover ..............................................................................................................................................................................3-74
3.4.1.8 Removing the Laser Scanner Unit ................................................................................................................................................................3-76
3.5 IMAGE FORMATION SYSTEM ...............................................................................................................................3-76
3.5.1 Rotary Drive Unit ...................................................................................................................................................................... 3-76
3.5.1.1 Removing the Rear Cover .............................................................................................................................................................................3-76
3.5.1.2 Removing the Reader Assembly ...................................................................................................................................................................3-76
3.5.1.3 Removing the Right Cover............................................................................................................................................................................3-77
3.5.1.4 Removing the Left Cover..............................................................................................................................................................................3-77
3.5.1.5 Removing the Power Supply Assembly........................................................................................................................................................3-78
3.5.1.6 Removing the Face-Down Cover..................................................................................................................................................................3-78
3.5.1.7 Removing the Top Cover ..............................................................................................................................................................................3-78
3.5.1.8 Removing the Right Frame ...........................................................................................................................................................................3-79
3.5.1.9 Removing the Shield Plate ............................................................................................................................................................................3-79
3.5.1.10 Removing the Rotary Drive Assembly .......................................................................................................................................................3-79
3.5.2 Drum Cartridge Memory Tag Contact....................................................................................................................................... 3-80
3.5.2.1 Removing the Rear Cover .............................................................................................................................................................................3-80
3.5.2.2 Removing the Reader Assembly ...................................................................................................................................................................3-80
3.5.2.3 Removing the Right Cover............................................................................................................................................................................3-81
3.5.2.4 Removing the Left Cover..............................................................................................................................................................................3-81
3.5.2.5 Removing the Power Supply Assembly........................................................................................................................................................3-82
3.5.2.6 Removing the Face-Down Cover..................................................................................................................................................................3-82
3.5.2.7 Removing the Top Cover ..............................................................................................................................................................................3-82
3.5.2.8 Removing the Right Frame ...........................................................................................................................................................................3-83
3.5.2.9 Removing the Shield Plate ............................................................................................................................................................................3-83
3.5.2.10 Removing the Inside Cover.........................................................................................................................................................................3-83
3.5.2.11 Removing the Drum Cartridge Memory Tag Contact ................................................................................................................................3-84
3.5.3 Developing Rotary Unit ............................................................................................................................................................. 3-84
3.5.3.1 Removing the Rear Cover .............................................................................................................................................................................3-84
3.5.3.2 Removing the Reader Assembly ...................................................................................................................................................................3-84
3.5.3.3 Removing the Right Cover............................................................................................................................................................................3-85
3.5.3.4 Removing the Left Cover..............................................................................................................................................................................3-85
3.5.3.5 Removing the Power Supply Assembly........................................................................................................................................................3-86
3.5.3.6 Removing the Face-Down Cover..................................................................................................................................................................3-86
3.5.3.7 Removing the Top Cover ..............................................................................................................................................................................3-86
3.5.3.8 Removing the Right Frame ...........................................................................................................................................................................3-87
3.5.3.9 Removing the Shield Plate ............................................................................................................................................................................3-87
3.5.3.10 Removing the Inside Cover.........................................................................................................................................................................3-87
3.5.3.11 Removing the Registration Clutch ..............................................................................................................................................................3-88
3.5.3.12 Removing the Main Drive Assembly..........................................................................................................................................................3-88
3.5.3.13 Removing the Rotary Drive Assembly .......................................................................................................................................................3-88
3.5.3.14 Removing the Left Frame ...........................................................................................................................................................................3-89
3.5.3.15 Removing the Fan Duct ..............................................................................................................................................................................3-89
3.5.3.16 Removing the Laser Scanner Unit Base......................................................................................................................................................3-89
3.5.3.17 Removing the Developing Rotary Assembly..............................................................................................................................................3-89
3.5.4 Engaging Motor ......................................................................................................................................................................... 3-90
3.5.4.1 Removing the Rear Cover .............................................................................................................................................................................3-90
3.5.4.2 Removing the Reader Assembly ...................................................................................................................................................................3-90
3.5.4.3 Removing the Right Cover............................................................................................................................................................................3-91
3.5.4.4 Removing the Left Cover..............................................................................................................................................................................3-91
3.5.4.5 Removing the Power Supply Assembly........................................................................................................................................................3-92
3.5.4.6 Removing the Face-Down Cover..................................................................................................................................................................3-92
Contents
3.5.4.7 Removing the Top Cover.............................................................................................................................................................................. 3-92
3.5.4.8 Removing the Left Frame ............................................................................................................................................................................. 3-93
3.5.4.9 Removing the Shift Motor ............................................................................................................................................................................ 3-93
3.5.5 Developing Rotary Motor .......................................................................................................................................................... 3-93
3.5.5.1 Removing the Rear Cover............................................................................................................................................................................. 3-93
3.5.5.2 Removing the Reader Assembly................................................................................................................................................................... 3-94
3.5.5.3 Removing the Right Cover ........................................................................................................................................................................... 3-95
3.5.5.4 Removing the Left Cover ............................................................................................................................................................................. 3-95
3.5.5.5 Removing the Power Supply Assembly ....................................................................................................................................................... 3-95
3.5.5.6 Removing the Face-Down Cover ................................................................................................................................................................. 3-95
3.5.5.7 Removing the Top Cover.............................................................................................................................................................................. 3-95
3.5.5.8 Removing the Right Frame........................................................................................................................................................................... 3-97
3.5.5.9 Removing the Shield Plate............................................................................................................................................................................ 3-97
3.5.5.10 Removing the Rotary Drive Assembly ....................................................................................................................................................... 3-97
3.5.5.11 Removing the Developing Rotary Motor ................................................................................................................................................... 3-97
3.5.6 Developing Rotary Stopper Solenoid ........................................................................................................................................ 3-97
3.5.6.1 Removing the Rear Cover............................................................................................................................................................................. 3-97
3.5.6.2 Removing the Reader Assembly................................................................................................................................................................... 3-98
3.5.6.3 Removing the Right Cover ........................................................................................................................................................................... 3-99
3.5.6.4 Removing the Left Cover ............................................................................................................................................................................. 3-99
3.5.6.5 Removing the Power Supply Assembly ....................................................................................................................................................... 3-99
3.5.6.6 Removing the Face-Down Cover ................................................................................................................................................................. 3-99
3.5.6.7 Removing the Top Cover.............................................................................................................................................................................. 3-99
3.5.6.8 Removing the Right Frame......................................................................................................................................................................... 3-101
3.5.6.9 Removing the Shield Plate.......................................................................................................................................................................... 3-101
3.5.6.10 Removing the Rotary Drive Assembly ..................................................................................................................................................... 3-101
3.5.6.11 Removing the Toner Cartridge Motor ...................................................................................................................................................... 3-101
3.5.6.12 Removing the Developing Rotary Motor ................................................................................................................................................. 3-101
3.5.6.13 Removing the Developing Rotary Stopper Solenoid................................................................................................................................ 3-102
3.5.7 Density Detection PCB ............................................................................................................................................................ 3-102
3.5.7.1 Removing the Rear Cover........................................................................................................................................................................... 3-102
3.5.7.2 Removing the Reader Assembly................................................................................................................................................................. 3-102
3.5.7.3 Removing the Right Cover ......................................................................................................................................................................... 3-103
3.5.7.4 Removing the Left Cover ........................................................................................................................................................................... 3-103
3.5.7.5 Removing the Power Supply Assembly ..................................................................................................................................................... 3-104
3.5.7.6 Removing the Face-Down Cover ............................................................................................................................................................... 3-104
3.5.7.7 Removing the Top Cover............................................................................................................................................................................ 3-104
3.5.7.8 Removing the Inside Cover ........................................................................................................................................................................ 3-105
3.5.7.9 Removing the Dust-Blocking Cover........................................................................................................................................................... 3-105
3.5.7.10 Removing the Density Detection PCB ..................................................................................................................................................... 3-105
3.5.8 ITB Home Position Detection PCB ......................................................................................................................................... 3-106
3.5.8.1 Removing the Rear Cover........................................................................................................................................................................... 3-106
3.5.8.2 Removing the Reader Assembly................................................................................................................................................................. 3-106
3.5.8.3 Removing the Right Cover ......................................................................................................................................................................... 3-107
3.5.8.4 Removing the Left Cover ........................................................................................................................................................................... 3-107
3.5.8.5 Removing the Power Supply Assembly ..................................................................................................................................................... 3-107
3.5.8.6 Removing the Face-Down Cover ............................................................................................................................................................... 3-107
3.5.8.7 Removing the Top Cover............................................................................................................................................................................ 3-108
3.5.8.8 Removing the Inside Cover ........................................................................................................................................................................ 3-109
3.5.8.9 Removing the ITB Home Position Detection PCB .................................................................................................................................... 3-109
3.5.9 Transfer Charging Roller ......................................................................................................................................................... 3-109
3.5.9.1 Removing the Transfer Charging Roller .................................................................................................................................................... 3-109
3.5.10 Waste toner Detection PCB ................................................................................................................................................... 3-110
3.5.10.1 Removing the Rear Cover......................................................................................................................................................................... 3-110
3.5.10.2 Removing the Reader Assembly............................................................................................................................................................... 3-110
3.5.10.3 Removing the Right Cover ....................................................................................................................................................................... 3-111
3.5.10.4 Removing the Left Cover ......................................................................................................................................................................... 3-111
3.5.10.5 Removing the Power Supply Assembly ................................................................................................................................................... 3-111
3.5.10.6 Removing the Face-Down Cover ............................................................................................................................................................. 3-112
3.5.10.7 Removing the Top Cover.......................................................................................................................................................................... 3-112
3.5.10.8 Removing the Right Frame....................................................................................................................................................................... 3-113
Contents
3.5.10.9 Removing the Registration Clutch ............................................................................................................................................................3-113
3.5.10.10 Removing the Main Drive Assembly......................................................................................................................................................3-113
3.5.10.11 Removing the Waste Toner Detection PCB............................................................................................................................................3-114
3.5.11 Developing Rotary/Toner Level Detection PCB ................................................................................................................... 3-114
3.5.11.1 Removing the Rear Cover .........................................................................................................................................................................3-114
3.5.11.2 Removing the Reader Assembly ...............................................................................................................................................................3-114
3.5.11.3 Removing the Right Cover........................................................................................................................................................................3-115
3.5.11.4 Removing the Left Cover..........................................................................................................................................................................3-115
3.5.11.5 Removing the Power Supply Assembly....................................................................................................................................................3-116
3.5.11.6 Removing the Face-Down Cover..............................................................................................................................................................3-116
3.5.11.7 Removing the Top Cover ..........................................................................................................................................................................3-116
3.5.11.8 Removing the Right Frame .......................................................................................................................................................................3-117
3.5.11.9 Removing the Registration Clutch ............................................................................................................................................................3-117
3.5.11.10 Removing the Main Drive Assembly......................................................................................................................................................3-117
3.5.11.11 Removing the Rotary Drive Assembly ...................................................................................................................................................3-118
3.5.11.12 Removing the Left Frame .......................................................................................................................................................................3-119
3.5.11.13 Removing the Fan Duct ..........................................................................................................................................................................3-119
3.5.11.14 Removing the Laser Scanner Unit Base..................................................................................................................................................3-119
3.5.11.15 Removing the Developing Rotary Assembly..........................................................................................................................................3-119
3.5.11.16 Removing the Developing Rotary/Toner Level Detection PCB.............................................................................................................3-120
3.5.12 Toner Cartridge Motor ........................................................................................................................................................... 3-120
3.5.12.1 Removing the Rear Cover .........................................................................................................................................................................3-120
3.5.12.2 Removing the Reader Assembly ...............................................................................................................................................................3-121
3.5.12.3 Removing the Right Cover........................................................................................................................................................................3-121
3.5.12.4 Removing the Left Cover..........................................................................................................................................................................3-121
3.5.12.5 Removing the Power Supply Assembly....................................................................................................................................................3-122
3.5.12.6 Removing the Face-Down Cover..............................................................................................................................................................3-122
3.5.12.7 Removing the Top Cover ..........................................................................................................................................................................3-122
3.5.12.8 Removing the Right Frame .......................................................................................................................................................................3-123
3.5.12.9 Removing the Shield Plate ........................................................................................................................................................................3-123
3.5.12.10 Removing the Rotary Drive Assembly ...................................................................................................................................................3-123
3.5.12.11 Removing the Toner Cartridge Motor.....................................................................................................................................................3-124
3.6 PICKUP AND FEEDING SYSTEM .........................................................................................................................3-124
3.6.1 Cassette Pickup Roller ............................................................................................................................................................. 3-124
3.6.1.1 Removing the Cassettes ..............................................................................................................................................................................3-124
3.6.1.2 Removing the Rear Cover ...........................................................................................................................................................................3-124
3.6.1.3 Removing the Right Cover..........................................................................................................................................................................3-124
3.6.1.4 Removing the Left Cover............................................................................................................................................................................3-125
3.6.1.5 Removing the Cassette Pickup Roller.........................................................................................................................................................3-125
3.6.2 Cassette Paper Sensor .............................................................................................................................................................. 3-125
3.6.2.1 Removing the Cassettes ..............................................................................................................................................................................3-125
3.6.2.2 Removing the Rear Cover ...........................................................................................................................................................................3-125
3.6.2.3 Removing the Reader Assembly .................................................................................................................................................................3-126
3.6.2.4 Removing the Right Cover..........................................................................................................................................................................3-127
3.6.2.5 Removing the Left Cover............................................................................................................................................................................3-127
3.6.2.6 Removing the Power Supply Assembly......................................................................................................................................................3-127
3.6.2.7 Removing the Face-Down Cover................................................................................................................................................................3-127
3.6.2.8 Removing the Top Cover ............................................................................................................................................................................3-127
3.6.2.9 Removing the Right Frame .........................................................................................................................................................................3-129
3.6.2.10 Removing the Left Frame .........................................................................................................................................................................3-129
3.6.2.11 Removing the Cassette Feeder ..................................................................................................................................................................3-129
3.6.2.12 Removing the Cassette Paper Sensor ........................................................................................................................................................3-129
3.6.3 Cassette Feed Sensor................................................................................................................................................................ 3-129
3.6.3.1 Removing the Cassettes ..............................................................................................................................................................................3-129
3.6.3.2 Removing the Rear Cover ...........................................................................................................................................................................3-129
3.6.3.3 Removing the Reader Assembly .................................................................................................................................................................3-130
3.6.3.4 Removing the Right Cover..........................................................................................................................................................................3-131
3.6.3.5 Removing the Left Cover............................................................................................................................................................................3-131
3.6.3.6 Removing the Power Supply Assembly......................................................................................................................................................3-131
3.6.3.7 Removing the Face-Down Cover................................................................................................................................................................3-131
3.6.3.8 Removing the Top Cover ............................................................................................................................................................................3-131
Contents
3.6.3.9 Removing the Right Frame......................................................................................................................................................................... 3-133
3.6.3.10 Removing the Left Frame ......................................................................................................................................................................... 3-133
3.6.3.11 Removing the Cassette Feeder.................................................................................................................................................................. 3-133
3.6.3.12 Removing the Cassette Feed Sensor ......................................................................................................................................................... 3-133
3.6.4 Cassette Pickup Solenoid......................................................................................................................................................... 3-134
3.6.4.1 Removing the Cassettes .............................................................................................................................................................................. 3-134
3.6.4.2 Removing the Rear Cover........................................................................................................................................................................... 3-134
3.6.4.3 Removing the Reader Assembly................................................................................................................................................................. 3-134
3.6.4.4 Removing the Right Cover ......................................................................................................................................................................... 3-135
3.6.4.5 Removing the Left Cover ........................................................................................................................................................................... 3-135
3.6.4.6 Removing the Power Supply Assembly ..................................................................................................................................................... 3-135
3.6.4.7 Removing the Face-Down Cover ............................................................................................................................................................... 3-135
3.6.4.8 Removing the Top Cover............................................................................................................................................................................ 3-136
3.6.4.9 Removing the Right Frame......................................................................................................................................................................... 3-137
3.6.4.10 Removing the Left Frame ......................................................................................................................................................................... 3-137
3.6.4.11 Removing the Cassette Feeder.................................................................................................................................................................. 3-137
3.6.4.12 Removing the Cassette Pickup Solenoid .................................................................................................................................................. 3-137
3.6.5 Cassette Separation Pad ........................................................................................................................................................... 3-137
3.6.5.1 Removing the Cassette................................................................................................................................................................................ 3-137
3.6.5.2 Removing the Front of the Cassette............................................................................................................................................................ 3-137
3.6.5.3 Removing the Cassette Separation Pad ...................................................................................................................................................... 3-138
3.6.6 Manual Pickup Roller .............................................................................................................................................................. 3-138
3.6.6.1 Removing the Manual Pickup Roller.......................................................................................................................................................... 3-138
3.6.7 Manual Pickup Solenoid .......................................................................................................................................................... 3-138
3.6.7.1 Removing the Rear Cover........................................................................................................................................................................... 3-138
3.6.7.2 Removing the Reader Assembly................................................................................................................................................................. 3-139
3.6.7.3 Removing the Right Cover ......................................................................................................................................................................... 3-140
3.6.7.4 Removing the Left Cover ........................................................................................................................................................................... 3-140
3.6.7.5 Removing the Power Supply Assembly ..................................................................................................................................................... 3-140
3.6.7.6 Removing the Face-Down Cover ............................................................................................................................................................... 3-140
3.6.7.7 Removing the Top Cover............................................................................................................................................................................ 3-140
3.6.7.8 Removing the Right Frame......................................................................................................................................................................... 3-142
3.6.7.9 Removing the Shield Plate.......................................................................................................................................................................... 3-142
3.6.7.10 Removing the Inside Cover ...................................................................................................................................................................... 3-142
3.6.7.11 Removing the Registration Clutch............................................................................................................................................................ 3-142
3.6.7.12 Removing the Main Drive Assembly ....................................................................................................................................................... 3-142
3.6.7.13 Removing the Manual Pickup Feed Solenoid........................................................................................................................................... 3-143
3.6.8 Manual Separation Roller ........................................................................................................................................................ 3-143
3.6.8.1 Removing the Cassettes .............................................................................................................................................................................. 3-143
3.6.8.2 Removing the Rear Cover........................................................................................................................................................................... 3-143
3.6.8.3 Removing the Right Cover (with the reader assembly intact).................................................................................................................... 3-143
3.6.8.4 Removing the Left Cover (with the reader assembly intact) ...................................................................................................................... 3-144
3.6.8.5 Removing the Lower Front Cover .............................................................................................................................................................. 3-145
3.6.8.6 Removing the Front Cover ......................................................................................................................................................................... 3-145
3.6.8.7 Removing the Manual Feed Pickup Separation Pad................................................................................................................................... 3-145
3.6.9 Registration Detection PCB..................................................................................................................................................... 3-145
3.6.9.1 Removing the Fixing Assembly ................................................................................................................................................................. 3-145
3.6.9.2 Removing the Fixing Assembly ................................................................................................................................................................. 3-146
3.6.9.3 Removing the Rear Cover........................................................................................................................................................................... 3-146
3.6.9.4 Removing the Reader Assembly................................................................................................................................................................. 3-146
3.6.9.5 Removing the Right Cover ......................................................................................................................................................................... 3-147
3.6.9.6 Removing the Left Cover ........................................................................................................................................................................... 3-147
3.6.9.7 Removing the Power Supply Assembly ..................................................................................................................................................... 3-148
3.6.9.8 Removing the Face-Down Cover ............................................................................................................................................................... 3-148
3.6.9.9 Removing the Top Cover............................................................................................................................................................................ 3-148
3.6.9.10 Removing the Right Frame....................................................................................................................................................................... 3-149
3.6.9.11 Removing the Left Frame ......................................................................................................................................................................... 3-149
3.6.9.12 Removing the Cassette Feeder.................................................................................................................................................................. 3-149
3.6.9.13 Removing the Shield Plate........................................................................................................................................................................ 3-150
3.6.9.14 Removing the Fan Duct ............................................................................................................................................................................ 3-150
3.6.9.15 Removing the Lower Case Assembly....................................................................................................................................................... 3-150
Contents
3.6.9.16 Removing the Registration Detection PCB...............................................................................................................................................3-150
3.6.10 Main Motor ............................................................................................................................................................................ 3-151
3.6.10.1 Removing the Rear Cover .........................................................................................................................................................................3-151
3.6.10.2 Removing the Reader Assembly ...............................................................................................................................................................3-151
3.6.10.3 Removing the Right Cover........................................................................................................................................................................3-152
3.6.10.4 Removing the Left Cover..........................................................................................................................................................................3-152
3.6.10.5 Removing the Power Supply Assembly....................................................................................................................................................3-152
3.6.10.6 Removing the Face-Down Cover..............................................................................................................................................................3-152
3.6.10.7 Removing the Top Cover ..........................................................................................................................................................................3-153
3.6.10.8 Removing the Right Frame .......................................................................................................................................................................3-154
3.6.10.9 Removing the Shield Plate ........................................................................................................................................................................3-154
3.6.10.10 Removing the Inside Cover.....................................................................................................................................................................3-154
3.6.10.11 Removing the Registration Clutch ..........................................................................................................................................................3-154
3.6.10.12 Removing the Main Drive Assembly......................................................................................................................................................3-154
3.6.10.13 Removing the Main Motor......................................................................................................................................................................3-155
3.7 FIXING SYSTEM .....................................................................................................................................................3-155
3.7.1 Fixing Unit ............................................................................................................................................................................... 3-155
3.7.1.1 Removing the Fixing Assembly..................................................................................................................................................................3-155
3.7.2 Fixing Film Unit ...................................................................................................................................................................... 3-155
3.7.2.1 Removing the Fixing Assembly..................................................................................................................................................................3-155
3.7.2.2 Removing the Face-Up Cover.....................................................................................................................................................................3-155
3.7.2.3 Removing the Fixing Film Unit ..................................................................................................................................................................3-156
3.7.3 Fixing Pressure Roller.............................................................................................................................................................. 3-157
3.7.3.1 Removing the Fixing Assembly..................................................................................................................................................................3-157
3.7.3.2 Removing the Face-Up Cover.....................................................................................................................................................................3-157
3.7.3.3 Removing the Fixing Film Unit ..................................................................................................................................................................3-157
3.7.3.4 Removing the Fixing Pressure Roller .........................................................................................................................................................3-159
3.7.4 Fixing Delivery Paper Sensor .................................................................................................................................................. 3-159
3.7.4.1 Removing the Fixing Assembly..................................................................................................................................................................3-159
3.7.4.2 Removing the Face-Up Cover.....................................................................................................................................................................3-159
3.7.5 Pre-Fixing Paper Detection Sensor .......................................................................................................................................... 3-159
3.7.5.1 Removing the Rear Cover ...........................................................................................................................................................................3-159
3.7.5.2 Removing the Reader Assembly .................................................................................................................................................................3-160
3.7.5.3 Removing the Right Cover..........................................................................................................................................................................3-161
3.7.5.4 Removing the Left Cover............................................................................................................................................................................3-161
3.7.5.5 Removing the Power Supply Assembly......................................................................................................................................................3-161
3.7.5.6 Removing the Face-Down Cover................................................................................................................................................................3-161
3.7.5.7 Removing the Top Cover ............................................................................................................................................................................3-161
3.7.5.8 Removing the Right Frame .........................................................................................................................................................................3-163
3.7.5.9 Removing the Left Frame ...........................................................................................................................................................................3-163
3.7.5.10 Removing the Cassette Feeder ..................................................................................................................................................................3-163
3.7.5.11 Removing the Shield Plate ........................................................................................................................................................................3-163
3.7.5.12 Removing the Inside Cover.......................................................................................................................................................................3-163
3.7.5.13 Removing the Registration Clutch ............................................................................................................................................................3-163
3.7.5.14 Removing the Main Drive Assembly........................................................................................................................................................3-164
3.7.5.15 Removing the Toner Tray .........................................................................................................................................................................3-164
3.7.5.16 Removing the Fixing Front Paper Sensor Spacer .....................................................................................................................................3-164
3.7.5.17 Removing the Fan Duct ............................................................................................................................................................................3-164
3.7.5.18 Removing the Lower Case Assembly .......................................................................................................................................................3-165
3.7.5.19 Removing the Fixing Front Paper Sensor .................................................................................................................................................3-165
3.7.6 Fixing Motor ............................................................................................................................................................................ 3-165
3.7.6.1 Removing the Rear Cover ...........................................................................................................................................................................3-165
3.7.6.2 Removing the Reader Assembly .................................................................................................................................................................3-166
3.7.6.3 Removing the Right Cover..........................................................................................................................................................................3-167
3.7.6.4 Removing the Left Cover............................................................................................................................................................................3-167
3.7.6.5 Removing the Power Supply Assembly......................................................................................................................................................3-167
3.7.6.6 Removing the Face-Down Cover................................................................................................................................................................3-167
3.7.6.7 Removing the Top Cover ............................................................................................................................................................................3-167
3.7.6.8 Removing the Right Frame .........................................................................................................................................................................3-169
3.7.6.9 Removing the Shield Plate ..........................................................................................................................................................................3-169
3.7.6.10 Removing the Fixing Motor......................................................................................................................................................................3-169
Chapter 3
3.1 Cartridge Removal at Trouble Eruption Cartridge Removal at Trouble Eruption
3.1.1 Cartridge Removal at Trouble Eruption
0007-8336
If you removed the cartridge as you normally would in response to a fault in the machine, you could damage the machine. Be sure to observe the following removing
the 2 types of cartridges (toner, drum) from he machine.
You will have to disconnect and connect the power cord as follows when removing these cartridges. Be sure not to ignore this step.
Turning On and Off the Power
OFF -> ON (wait for 5 sec or more) -> OFF
3.1.2 Toner cartridge removal
0007-8337
1) Remove the reinforcement plate.
2) Be sure that the engaging sensor flag is at the position as shown in the following figure(in toner cartridges memory tag contact disengaging status).
If the sensor flag is not at the position in the following figure(in toner cartridges memory tag contact engaging status), rotate the 33T gear by hands so that it is at
the position.
33T gear
Engaging sensor
Sensor flag
F-3-1
3) Rotate the 23T gear by hands in the direction of the arrow so that the rotary guide of the toner cartridge is at the top.
23Tgear
Rotary guide
23Tgear
Toner cartridge
Rotary
guide
F-3-2
4) Grasp the finger holding on the toner cartridge and remove the cartridge in a horizontal position from the printer.
3-1
Chapter 3
[1]
[3]
[3]
[2]
F-3-5
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
F-3-3
5) Repeat the steps 3) and 4) to remove the toner cartridges for each color.
3.1.3 Drum cartridge removal
1) Open the top cover unit and remove the drum cartridge.
0007-8338
When removing the drum cartridge with the top cover unit detached, be
sure to pull up the drive release lever [1]. The drum cartridge cannot be removed otherwise.
[5]
F-3-6
4) Close the reader assembly; then, detach the rear cover[1].
2) Remove the drum cartridge from the printer.
[1]
[1]
[3]
[3]
[2]
F-3-7
3.2.1.3 Removing the Right Cover (with the reader
assembly intact)
1) Free the cable [1] of the reader assembly.
F-3-4
3.2 EXTERNAL AND CONTROLS SYSTEM
3.2.1 Front Cover
3.2.1.1 Removing the Cassettes
1) Hold the grip, and take out the cassette.
0007-6971
3.2.1.2 Removing the Rear Cover
0007-6981
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-2
0007-6982
Chapter 3
[3]
[1]
[2]
[2]
F-3-11
3.2.1.4 Removing the Left Cover (with the reader
assembly intact)
0007-6984
1) Disconnect the plug [1], and free the cable [2] of the reader assembly from
the guide.
F-3-8
2) Open the reader assembly [1] and the top cover [2].
[1]
[2]
[2]
F-3-9
[2]
3) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-12
2) Open the reader assembly [1] and the top cover [2].
[1]
[2]
[1]
F-3-10
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
F-3-13
3) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the right cover [3].
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
3-3
Chapter 3
[3]
[2]
[2]
[1]
[1]
[1]
[2]
F-3-17
F-3-14
2) Slide the front cover [1] to the left to detach.
[2]
[3]
[2]
[1]
F-3-18
3.2.2 Rear Cover
F-3-15
3.2.2.1 Removing the Rear Cover
3.2.1.5 Removing the Lower Front Cover
0007-6974
0007-6986
1) Free the claw [1] using a flat-blade screwdriver; then, slide the lower
cover [2] to the left to detach.
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[1]
[2]
[2]
F-3-19
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-16
3.2.1.6 Removing the Front Cover
[4]
0007-6987
1) Push the 2 bosses [1] used to hold the manual feed tray toward the inside
while pushing the guide assembly [2] toward the outside to free the
bosses.
[5]
F-3-20
4) Close the reader assembly; then, detach the rear cover[1].
3-4
Chapter 3
3.2.3.3 Removing the Reader Assembly
0007-8480
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[3]
[3]
[2]
F-3-21
[1]
3.2.3 Top Cover
[1]
3.2.3.1 Removing the Cassettes
0007-6972
1) Hold the grip, and take out the cassette.
[2]
[2]
3.2.3.2 Removing the Rear Cover
0007-6989
F-3-25
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[2]
F-3-22
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-26
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-23
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-27
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-24
3-5
Chapter 3
[2]
[1]
[2]
F-3-28
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-32
[1]
[3]
[2]
[1]
[2]
[1]
F-3-29
F-3-33
3.2.3.4 Removing the Right Cover
0007-7013
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
3.2.3.6 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-7037
[1]
[1]
[1]
F-3-30
[2]
[1]
[3]
F-3-34
3.2.3.7 Removing the Face-Down Cover
0007-7038
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[2]
[1]
[2]
F-3-31
3.2.3.5 Removing the Left Cover
0007-7016
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
3-6
F-3-35
Chapter 3
3.2.3.8 Removing the Top Cover
0007-7041
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[1]
[4]
[2]
[1]
[2]
F-3-36
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-38
Enlarged View of the Paper Retainer
[2]
OK
NG
[1]
[1]
[4]
[3]
[3]
F-3-39
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-37
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-40
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-7
Chapter 3
[1]
[1]
[3]
[3]
[2]
F-3-44
3.2.4.3 Removing the Right Cover (with the reader
assembly intact)
[2]
0007-6978
1) Free the cable [1] of the reader assembly.
F-3-41
3.2.4 Right Cover
3.2.4.1 Removing the Cassettes
0007-6969
1) Hold the grip, and take out the cassette.
[1]
3.2.4.2 Removing the Rear Cover
0007-6975
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
F-3-45
2) Open the reader assembly [1] and the top cover [2].
[2]
F-3-42
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[1]
[2]
[4]
F-3-46
3) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[5]
F-3-43
4) Close the reader assembly; then, detach the rear cover[1].
3-8
Chapter 3
[4]
[5]
[1]
F-3-50
F-3-47
4) Close the reader assembly; then, detach the rear cover[1].
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
[1]
[3]
[3]
[3]
[2]
[2]
F-3-51
3.2.5.3 Removing the Left Cover (with the reader
assembly intact)
[2]
0007-6980
1) Disconnect the plug [1], and free the cable [2] of the reader assembly from
the guide.
F-3-48
3.2.5 Left Cover
3.2.5.1 Removing the Cassettes
[2]
0007-6970
1) Hold the grip, and take out the cassette.
3.2.5.2 Removing the Rear Cover
0007-6979
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[2]
[1]
F-3-52
[2]
2) Open the reader assembly [1] and the top cover [2].
F-3-49
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-9
Chapter 3
[1]
[1]
[2]
[3]
[3]
[2]
F-3-53
3) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the right cover [3].
F-3-56
3) Open the reader assembly [4], and lift to free the 2 claws [5].
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
[4]
[5]
F-3-57
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
F-3-54
[2]
[3]
[3]
[3]
[2]
[2]
F-3-58
3.2.6.2 Removing the Reader Assembly
0008-9836
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
F-3-55
3.2.6 Upper Right Cover
3.2.6.1 Removing the Rear Cover
0007-8453
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[2]
[2]
F-3-59
3-10
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
[1]
F-3-63
3.2.6.3 Removing the Scanner Unit
0008-9843
1) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[1]
[2]
F-3-60
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-64
3.2.6.4 Removing the Upper Right Cover
0007-8490
1) Remove the 2 screws [1]; then, remove the 5 claws [2] to detach the upper
right cover [3].
[3]
[2]
F-3-61
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[1]
[2]
[3]
[1]
[2]
[1]
[2]
[2]
F-3-65
F-3-62
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.2.7 Upper Left Cover
3.2.7.1 Removing the Rear Cover
0007-8499
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-11
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-66
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-70
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-67
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-71
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-68
3.2.7.2 Removing the Reader Assembly
0008-9847
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-72
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-69
3-12
Chapter 3
[1]
[1]
[1]
F-3-73
3.2.7.3 Removing the Scanner Unit
[1]
[3]
[2]
[1]
0008-9848
1) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
F-3-76
3.2.8.2 Removing the Face-Up Cover
[2]
0011-7553
1) Turn the fixing lever [1] of the fixing assembly 90 deg in the direction of
the arrow.
2) Remove the 4 claws [2], and detach the face-up cover [3] from the fixing
assembly.
[2]
[1]
F-3-74
[1]
3.2.7.4 Removing the Upper Left Cover
1) Remove the 2 screws [1]; then, remove the 5 claws [2] to detach the upper
left cover [3].
[3]
[2]
[1]
[3]
[1]
F-3-77
0007-8500
3.2.9 Main Drive Unit
3.2.9.1 Removing the Rear Cover
0007-8553
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[2]
[1]
[3]
[3]
F-3-75
3.2.8 Face-up cover
[2]
3.2.8.1 Removing the Fixing Assembly
0011-7848
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
F-3-78
3) Open the reader assembly [4], and lift to free the 2 claws [5].
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
3-13
Chapter 3
[4]
[5]
F-3-79
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
F-3-82
[3]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[3]
[1]
[2]
F-3-80
3.2.9.2 Removing the Reader Assembly
0007-8571
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[3]
[2]
F-3-83
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[1]
[1]
[2]
[2]
[2]
F-3-84
F-3-81
When closing the reader assembly, be sure to push in the arm [1] first.
3-14
5) Remove the 6 screws [1], and lift the reader unit to detach.
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-89
F-3-85
3.2.9.5 Removing the Power Supply Assembly
3.2.9.3 Removing the Right Cover
0007-8591
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8652
[1]
[1]
[1]
F-3-86
[1]
[2]
F-3-90
[3]
3.2.9.6 Removing the Face-Down Cover
0007-8656
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-87
3.2.9.4 Removing the Left Cover
0007-8614
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-91
3.2.9.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8674
[1]
F-3-88
3-15
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-92
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-94
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-95
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-93
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-96
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-16
Chapter 3
3.2.9.11 Removing the Registration Clutch
[1]
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
[4]
[2]
[2]
[3]
0007-8828
[1]
F-3-101
F-3-97
3.2.9.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6588
[1]
[2]
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3.2.9.12 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
[1]
0007-8831
[2]
[1]
F-3-98
F-3-102
2) Remove the 2 screws [1], and detach the front sub cover [2].
3.2.9.9 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
0008-9015
[2]
[2]
[1]
F-3-103
[1]
F-3-99
3.2.9.10 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6610
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[1]
[2]
[1]
[2]
[2]
F-3-100
F-3-104
3-17
Chapter 3
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
[1]
[1]
[3]
[3]
[2]
[2]
[2]
F-3-108
3.2.10.2 Removing the Scanner Unit
[3]
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
[1]
[1]
0007-8057
[1]
[2]
F-3-105
3.2.10 Operation Panel Unit
[3]
[2]
3.2.10.1 Removing the Rear Cover
F-3-109
0007-8056
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
[3]
[1]
[3]
[2]
[2]
F-3-110
F-3-106
3) Open the reader assembly [4], and lift to free the 2 claws [5].
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[2]
[4]
[1]
[5]
F-3-107
4) Close the reader assembly; then, detach the rear cover[1].
3-18
F-3-111
3.2.10.3 Removing the operation Panel
0007-8058
1) Remove the 2 screws [1], and free the 2 claws [2] (left/right) to open the
operation panel [3].
Chapter 3
[3]
[2]
[1]
[3]
[2]
[1]
[2]
F-3-116
F-3-112
2) Disconnect the 2 flat cables [1], and remove the 2 fastons [2]; then, detach
the operation panel [3].
[2]
[3]
[1]
[2]
3.2.11.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8062
[1]
[3]
F-3-113
[3]
[2]
3.2.11 SCNT Board
F-3-117
3.2.11.1 Removing the Rear Cover
0007-8059
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[2]
[1]
[1]
[3]
[2]
[3]
F-3-118
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[2]
F-3-114
[2]
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-119
3.2.11.3 Removing the Board Unit
[5]
F-3-115
0012-7164
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
board unit [2].
4) Close the reader assembly; then, detach the rear cover[1].
3-19
Chapter 3
[1]
[1]
[1]
[1]
[1]
[2]
F-3-124
[2]
4) Disconnect the flat cable [1] and the connector [2].
F-3-120
[1]
2) Open the board unit; then, disconnect the 6 connectors [1] and the 3 flat
cables [2].
[1]
[2]
[2]
F-3-125
5) Remove the screw [1], and disconnect the connector [2].
[2]
[1]
[1]
[2]
F-3-121
3.2.11.4 Removing the SCNT Unit
1) Remove the two screws [1], and detach the support plate [2].
0012-7165
[1]
[2]
F-3-126
[1]
6) Remove the screw [1], and detach the retainer [2].
[1]
[2]
[2]
F-3-122
2) Remove the 2 screws [1], and detach the modular board cover [2].
[2]
[3]
F-3-127
[1]
7) Disconnect the connector [1] and remove the lithium board [2].
[2]
[1]
F-3-123
MEMO:
Pay attention to the harness [3], as it is connected to the cover..
3) Remove the 4 screws [1], and open the NCU unit [2].
F-3-128
8) Remove the screw [1], and detach the two cable retainers [2].
3-20
Chapter 3
[2]
[2]
[1]
[1]
F-3-132
Never remove the SCNT board.
F-3-129
9) Disconnect the connector [1] and the cable [2].
[2]
F-3-133
3.2.12 DCNT Board
3.2.12.1 Removing the Rear Cover
0007-7954
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[3]
[3]
F-3-130
10) Disconnect the connector, remove the screw [2], and detach the fan [3]
together with cover.
[2]
F-3-134
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
[4]
[3]
[1]
F-3-131
11) Remove the two screws [1], and detach the cable guide [2].
[5]
F-3-135
4) Close the reader assembly; then, detach the rear cover[1].
3-21
Chapter 3
[1]
[1]
[3]
[3]
[3]
[2]
F-3-139
[2]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
F-3-136
3.2.12.2 Removing the Reader Assembly
[2]
0007-8459
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[2]
F-3-140
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[1]
[2]
F-3-137
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
F-3-141
3.2.12.3 Removing the Right Cover
0007-7956
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-138
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
3-22
[1]
F-3-142
Chapter 3
[1]
[2]
[2]
[1]
[3]
[1]
[2]
F-3-143
3.2.12.4 Removing the Left Cover
0007-7957
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-146
3.2.12.6 Removing the Face-Down Cover
0007-7959
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[1]
F-3-144
F-3-147
3.2.12.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[3]
0007-7960
[4]
[2]
[2]
F-3-145
3.2.12.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
0007-7958
[1]
[2]
F-3-148
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3-23
Chapter 3
[2]
[1]
[2]
[1]
[1]
[4]
F-3-152
[3]
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
F-3-149
[1]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
[1]
[2]
[2]
F-3-153
3.2.12.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6589
[1]
[2]
F-3-150
Enlarged View of the Paper Retainer
OK
NG
[1]
F-3-154
[3]
[3]
F-3-151
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-24
3.2.12.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
0011-6611
Chapter 3
[3]
[1]
[4]
[2]
[2]
F-3-155
3.2.12.10 Removing the DCNT Board
0007-7963
1) Disconnect the connector [1] connected to the DC controller, and remove
the 4 screws [2]; then, detach the DCNT board.
[5]
F-3-158
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[2]
[2]
[3]
[3]
[2]
[1]
F-3-159
3.2.13.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
[1]
[1]
[1]
0007-8063
[1]
[1]
F-3-156
3.2.13 NCU Board
3.2.13.1 Removing the Rear Cover
0007-8060
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[3]
[2]
F-3-160
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[1]
[2]
[3]
[1]
[3]
[2]
[2]
F-3-157
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-161
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
3-25
Chapter 3
[2]
[1]
[3]
[3]
[2]
F-3-166
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[1]
F-3-162
3.2.13.3 Removing the Modular Board Cover
1) Remove the 2 screws [1], and detach the modular board cover [2].
0007-8070
[4]
[3]
[2]
[1]
[5]
F-3-167
F-3-163
4) Close the reader assembly; then, detach the rear cover[1].
Pay attention to the harness [3].
3.2.13.4 Removing the NCU Board
[1]
0007-8068
1) Remove the 4 screws [1], and open the NCU unit [2].
[3]
[1]
[3]
[1]
[2]
[2]
F-3-168
F-3-164
2) Disconnect the flat cable [1] and the 2 connectors [2]; then, remove the 4
screws [3], and detach the NCU board [4].
3.2.14.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
[3]
0007-8064
[4]
[1]
[1]
[2]
[2]
[3]
[2]
F-3-165
3.2.14 Modular Board
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
3.2.14.1 Removing the Rear Cover
0007-8061
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-26
[3]
F-3-169
Chapter 3
[2]
[1]
[1]
[3]
[3]
[2]
F-3-170
[2]
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
F-3-174
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
[4]
[1]
F-3-171
[5]
3.2.14.3 Removing the Modular Board Cover
1) Remove the 2 screws [1], and detach the modular board cover [2].
F-3-175
0007-8069
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[2]
[1]
[3]
[3]
[2]
F-3-172
F-3-176
Pay attention to the harness [3].
3.2.15.2 Removing the Reader Assembly
3.2.14.4 Removing the Modular PCB
0007-8458
0007-9111
1) Disconnect the cable [1], and remove the 2 screws [2]; then, detach the
modular board [3].
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
[1]
[1]
[3]
[1]
F-3-173
[2]
3.2.15 Power Supply PCB
[2]
3.2.15.1 Removing the Rear Cover
0007-7019
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
F-3-177
3-27
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
[1]
F-3-181
3.2.15.3 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[1]
[2]
0007-7022
[1]
[1]
F-3-178
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-182
[3]
[2]
3.2.15.4 Removing the Power Supply PCB
F-3-179
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
0007-7023
1) Remove the claw [1], and detach the cover [2].
[1]
[1]
[2]
F-3-183
[2]
2) Disconnect the 3 connectors [1], and remove the 4 screws [2]; then, detach
the power supply PCB [3].
F-3-180
[2]
[2]
[3]
5) Remove the 6 screws [1], and lift the reader unit to detach.
[2]
[1]
F-3-184
3-28
[2]
Chapter 3
3.2.16 Print Power Supply PCB
3.2.16.1 Removing the Fixing Assembly
[1]
0011-7861
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[3]
[3]
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[2]
F-3-188
3.2.16.3 Removing the Reader Assembly
0007-8524
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[1]
[3]
[2]
[1]
[1]
F-3-185
[2]
3.2.16.2 Removing the Rear Cover
[2]
0007-8522
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
F-3-189
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[2]
F-3-186
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-190
[5]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
F-3-187
4) Close the reader assembly; then, detach the rear cover[1].
3-29
Chapter 3
[1]
[2]
[3]
[2]
[3]
[2]
F-3-191
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-195
3.2.16.5 Removing the Left Cover
[1]
0007-8528
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[2]
F-3-192
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
F-3-196
[3]
[1]
[2]
[1]
F-3-193
3.2.16.4 Removing the Right Cover
[2]
0007-8526
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-197
3.2.16.6 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
F-3-194
3-30
0007-8531
Chapter 3
[1]
[2]
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-198
3.2.16.7 Removing the Face-Down Cover
0007-8534
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[3]
F-3-201
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-199
[1]
3.2.16.8 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
0007-8536
[4]
[2]
[1]
[2]
F-3-200
F-3-202
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-203
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-31
Chapter 3
[2]
[1]
[1]
[2]
[1]
F-3-207
F-3-204
3.2.16.11 Removing the Cassette Feeder
0007-8539
1) Lift the machine, and detach the cassette feeder [1].
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[1]
[1]
F-3-208
3.2.16.12 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
[2]
0011-6612
[1]
F-3-205
3.2.16.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6591
[2]
[2]
[1]
[2]
F-3-209
3.2.16.13 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
F-3-206
3.2.16.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
3-32
0007-8538
0007-8541
Chapter 3
down the machine.
[1]
[1]
[3]
If you must detach the lower case assembly, base user to hold it by its bottom
so as to avoid injury by the edge of its side plate.
3.2.16.15 Removing the Printer Power Supply PCB
0007-8543
1) Remove the 3 screws [1], and disconnect the 4 connectors [2]; then, detach
the cable guide [3].
[1]
[1]
[2]
[1]
F-3-210
3.2.16.14 Removing the Lower Case Assembly
1) Remove the screw [1], and disconnect the 5 connectors [2].
[2]
0007-8542
[2]
[1]
[3]
[2]
F-3-214
2) Remove the 6 screws [1], and detach the printer power supply PCB [2].
[1]
[1]
F-3-211
2) Remove the screw [1] from the left side of the machine.
[2]
[1]
[1]
F-3-215
3.2.17 High-voitage Power Supply PCB
F-3-212
3) With care, shift down the machine to the left; then, remove the 8 screws
[2] from the bottom, and detach the lower case assembly [3].
[3]
[2]
3.2.17.1 Removing the Fixing Assembly
0011-7862
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[2]
[2]
[2]
F-3-213
When you shift down the machine, be sure to take care to avoid injury by the
edge of the side plate. Also, be sure to hold it by its grip segment.
Be sure to place a cushioning material (g., towel) on the work table to protect
the protrusions of the machine from damage.
Moreover, be sure to tape the opening of the laser scanner assembly to prevent intrusion of toner in the optical path of the assembly before shifting
3-33
Chapter 3
[1]
[3]
[3]
[2]
F-3-219
3.2.17.3 Removing the Reader Assembly
0007-8457
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[3]
[2]
[1]
F-3-216
3.2.17.2 Removing the Rear Cover
0007-7935
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[1]
[3]
[3]
[2]
[2]
F-3-220
[2]
F-3-217
3) Open the reader assembly [4], and lift to free the 2 claws [5].
When closing the reader assembly, be sure to push in the arm [1] first.
[4]
[5]
F-3-218
4) Close the reader assembly; then, detach the rear cover[1].
[1]
F-3-221
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
3-34
Chapter 3
[1]
[2]
[3]
[2]
[3]
[2]
F-3-222
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-226
3.2.17.5 Removing the Left Cover
[1]
0007-7938
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[2]
F-3-223
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
F-3-227
[3]
[1]
[2]
[1]
F-3-224
3.2.17.4 Removing the Right Cover
[2]
0007-7937
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-228
3.2.17.6 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
0007-7939
[1]
F-3-225
3-35
Chapter 3
[1]
[2]
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-229
3.2.17.7 Removing the Face-Down Cover
0007-7940
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[3]
F-3-232
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-230
[1]
3.2.17.8 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
0007-7941
[4]
[2]
[1]
[2]
F-3-231
F-3-233
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-234
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-36
Chapter 3
[2]
[1]
[1]
[2]
[1]
F-3-238
F-3-235
3.2.17.11 Removing the Cassette Feeder
0007-7948
1) Lift the machine, and detach the cassette feeder [1].
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[1]
[1]
F-3-239
3.2.17.12 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
[2]
0011-6613
[1]
F-3-236
3.2.17.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6592
[2]
[2]
[1]
[2]
F-3-240
3.2.17.13 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
0007-7950
[1]
F-3-237
3.2.17.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
0007-7944
3-37
Chapter 3
down the machine.
[1]
[1]
[3]
If you must detach the lower case assembly, base user to hold it by its bottom
so as to avoid injury by the edge of its side plate.
3.2.17.15 Removing the Sub High-Voltage Power Supply
PCB Unit
0007-7952
1) Remove 2 screws [1], disconnect the connector [2], remove the faston [3],
and remove the 4 claws; then, detach the sub high-voltage power supply
PCB unit [5].
[3]
[1]
[2]
[1]
[2]
F-3-241
3.2.17.14 Removing the Lower Case Assembly
1) Remove the screw [1], and disconnect the 5 connectors [2].
0007-7951
[2]
[4]
[1]
F-3-245
3.2.17.16 Removing the High-Voltage Power Supply PCB
0007-7953
1) Remove the 6 claws [1], remove the 2 screws [2], and disconnect the 2
connectors [3]; then, detach the high-voltage power supply PCB [4].
[1]
[4]
[1]
[1]
F-3-242
2) Remove the screw [1] from the left side of the machine.
[1]
[2]
[3]
[1]
F-3-246
F-3-243
3) With care, shift down the machine to the left; then, remove the 8 screws
[2] from the bottom, and detach the lower case assembly [3].
[3]
[2]
3.2.18.1 Removing the Fixing Assembly
0011-7863
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[2]
[2]
[2]
F-3-244
When you shift down the machine, be sure to take care to avoid injury by the
edge of the side plate. Also, be sure to hold it by its grip segment.
Be sure to place a cushioning material (g., towel) on the work table to protect
the protrusions of the machine from damage.
Moreover, be sure to tape the opening of the laser scanner assembly to prevent intrusion of toner in the optical path of the assembly before shifting
3-38
3.2.18 Sub High-Voltage Power Supply PCB
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
Chapter 3
[1]
[3]
[3]
[2]
F-3-250
3.2.18.3 Removing the Reader Assembly
0008-2721
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[3]
[2]
[1]
F-3-247
3.2.18.2 Removing the Rear Cover
0008-2718
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[1]
[3]
[3]
[2]
[2]
F-3-251
[2]
F-3-248
3) Open the reader assembly [4], and lift to free the 2 claws [5].
When closing the reader assembly, be sure to push in the arm [1] first.
[4]
[5]
F-3-249
4) Close the reader assembly; then, detach the rear cover[1].
[1]
F-3-252
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
3-39
Chapter 3
[1]
[2]
[3]
[2]
[3]
[2]
F-3-253
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-257
3.2.18.5 Removing the Left Cover
[1]
0008-2725
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[2]
F-3-254
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
F-3-258
[3]
[1]
[2]
[1]
F-3-255
3.2.18.4 Removing the Right Cover
[2]
0008-2724
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-259
3.2.18.6 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
F-3-256
3-40
0008-2727
Chapter 3
[1]
[2]
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-260
3.2.18.7 Removing the Face-Down Cover
0008-2729
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[3]
F-3-263
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-261
[1]
3.2.18.8 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
0008-2731
[4]
[2]
[1]
[2]
F-3-262
F-3-264
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-265
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-41
Chapter 3
[2]
[1]
[1]
[2]
[1]
F-3-269
F-3-266
3.2.18.11 Removing the Cassette Feeder
0008-2734
1) Lift the machine, and detach the cassette feeder [1].
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[1]
[1]
F-3-270
3.2.18.12 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
[2]
0011-6614
[1]
F-3-267
3.2.18.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6593
[2]
[2]
[1]
[2]
F-3-271
3.2.18.13 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
F-3-268
3.2.18.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
3-42
0008-2733
0008-2738
Chapter 3
down the machine.
[1]
[1]
[3]
If you must detach the lower case assembly, base user to hold it by its bottom
so as to avoid injury by the edge of its side plate.
3.2.18.15 Removing the Sub High-voltage Power Supply
Board
0008-2740
1) Remove the connector [1] and the faston [2], and detach the 4 claws [3];
remove the sub high-voltage power supply board [4].
[2]
[1]
[1]
[2]
[1]
F-3-272
3.2.18.14 Removing the Lower Case Assembly
1) Remove the screw [1], and disconnect the 5 connectors [2].
0008-2739
[3]
[2]
[4]
[3]
F-3-276
3.2.19 Internal Temperature Detection Thermistor
3.2.19.1 Removing the Rear Cover
0007-8565
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
F-3-273
2) Remove the screw [1] from the left side of the machine.
[3]
[3]
[1]
[2]
F-3-277
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-274
3) With care, shift down the machine to the left; then, remove the 8 screws
[2] from the bottom, and detach the lower case assembly [3].
[3]
[2]
[4]
[2]
[2]
[5]
[2]
F-3-275
F-3-278
4) Close the reader assembly; then, detach the rear cover[1].
When you shift down the machine, be sure to take care to avoid injury by the
edge of the side plate. Also, be sure to hold it by its grip segment.
Be sure to place a cushioning material (g., towel) on the work table to protect
the protrusions of the machine from damage.
Moreover, be sure to tape the opening of the laser scanner assembly to prevent intrusion of toner in the optical path of the assembly before shifting
3-43
Chapter 3
[1]
[1]
[3]
[3]
[3]
[2]
F-3-282
[2]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
F-3-279
3.2.19.2 Removing the Reader Assembly
[2]
0007-8578
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[2]
F-3-283
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[1]
[2]
F-3-280
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
F-3-284
3.2.19.3 Removing the Right Cover
0007-8601
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-281
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
3-44
[1]
F-3-285
Chapter 3
[1]
[2]
[2]
[1]
[3]
[1]
[2]
F-3-286
3.2.19.4 Removing the Left Cover
0007-8629
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-289
3.2.19.6 Removing the Face-Down Cover
0007-8657
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[1]
F-3-287
F-3-290
3.2.19.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[3]
0007-8675
[4]
[2]
[2]
F-3-288
3.2.19.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
0007-8653
[1]
[2]
F-3-291
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3-45
Chapter 3
[2]
[1]
[2]
[1]
[1]
[4]
F-3-295
[3]
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
F-3-292
[1]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
[1]
[2]
[2]
F-3-296
3.2.19.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6594
[1]
[2]
F-3-293
Enlarged View of the Paper Retainer
OK
NG
[1]
F-3-297
[3]
[3]
F-3-294
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-46
3.2.19.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
0011-6615
Chapter 3
[3]
[1]
[4]
[2]
[2]
F-3-298
3.2.19.10 Removing the Machine Inside Temperature
Thermistor
0007-8934
1) Disconnect the connector [1], and remove the screw [2]; then, detach the
machine inside temperature thermistor [3].
[5]
F-3-301
4) Close the reader assembly; then, detach the rear cover[1].
[2]
[3]
[1]
[1]
[3]
[3]
[2]
F-3-302
3.2.20.2 Removing the Reader Assembly
0007-8577
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
F-3-299
3.2.20 Cooling Fan
3.2.20.1 Removing the Rear Cover
0007-8559
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[1]
[3]
[2]
[3]
[2]
F-3-303
[2]
F-3-300
When closing the reader assembly, be sure to push in the arm [1] first.
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-47
Chapter 3
[1]
[1]
[1]
F-3-307
[1]
3.2.20.3 Removing the Right Cover
0007-8600
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-304
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-308
[3]
[2]
[2]
F-3-305
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-309
F-3-306
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.2.20.4 Removing the Left Cover
0007-8622
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-310
3-48
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-314
F-3-311
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.2.20.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8654
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-312
3.2.20.6 Removing the Face-Down Cover
0007-8658
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[3]
F-3-315
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-313
3.2.20.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8676
3-49
Chapter 3
[1]
[1]
[2]
[2]
F-3-319
3.2.20.8 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
0007-8809
F-3-316
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-317
[1]
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
F-3-320
3.2.20.9 Removing the Fan Duct
[2]
[1]
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
[1]
0007-8876
[3]
F-3-318
[1]
[2]
[1]
F-3-321
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-50
3.2.20.10 Removing the Cooling Fan
1) Remove the 2 claws [1], and detach the cooling fan [2].
0007-8878
Chapter 3
3.3.1.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8054
[1]
[1]
[2]
[1]
F-3-322
[3]
[2]
3.3 Document Feed/Exposure System
F-3-326
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
3.3.1 Scanner Unit
3.3.1.1 Removing the Rear Cover
[2]
[1]
0007-8055
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[2]
[3]
[3]
F-3-327
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[2]
[2]
F-3-323
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-328
3.3.2 ADF Unit
3.3.2.1 Removing the Rear Cover
0007-8071
[5]
F-3-324
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[3]
[3]
[3]
[3]
[2]
[2]
F-3-325
F-3-329
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-51
Chapter 3
[2]
[4]
[1]
F-3-334
[5]
3.3.2.3 Removing the SCNT Board Unit
F-3-330
4) Close the reader assembly; then, detach the rear cover[1].
0007-8073
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
[1]
[1]
[1]
[3]
[3]
[1]
[2]
[2]
F-3-331
F-3-335
3.3.2.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8072
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[1]
[1]
[2]
[3]
[2]
[1]
F-3-332
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
[2]
F-3-336
3.3.2.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0007-8074
[1]
[2]
[2]
F-3-333
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[3]
[4]
F-3-337
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
3-52
Chapter 3
[1]
[3]
[3]
[2]
[1]
F-3-341
[2]
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-338
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
[D]
[1]
[4]
[C]
[A]
[B]
[5]
F-3-342
4) Close the reader assembly; then, detach the rear cover[1].
[A]
[B]
[C]
[1]
F-3-339
3.3.2.5 Points to Note When Mounting the ADF Unit
0009-8277
Be sure to observe the following when mounting the ADF unit:
If the harness [1] is too taut, a break in the line can occur. Be sure there is
some slack when the ADF unit [2] is fully open.
[3]
[3]
[2]
[2]
F-3-343
[1]
3.3.3.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8076
[1]
F-3-340
3.3.3 Scanner Cover Unit
3.3.3.1 Removing the Rear Cover
0007-8075
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[2]
[3]
F-3-344
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
3-53
Chapter 3
[2]
[1]
[1]
[2]
[2]
[3]
[4]
F-3-345
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
F-3-349
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
[2]
[1]
[1]
[2]
F-3-346
F-3-350
3.3.3.3 Removing the SCNT Board Unit
0007-8078
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
[D]
[1]
[1]
[C]
[1]
[A]
[B]
[1]
[2]
F-3-347
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[A]
[B]
[C]
F-3-351
[1]
3.3.3.5 Removing the operation Panel
[2]
0007-8080
1) Remove the 2 screws [1], and free the 2 claws [2] (left/right) to open the
operation panel [3].
[3]
[2]
[1]
[2]
F-3-348
3.3.3.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0007-8079
[2]
[1]
F-3-352
2) Disconnect the 2 flat cables [1], and remove the 2 fastons [2]; then, detach
3-54
Chapter 3
the operation panel [3].
[2]
[1]
[2]
[4]
[3]
F-3-353
3.3.3.6 Removing the Scanner Cover Unit
1) Remove the copyboard cover.
2) Remove the 2 screws [1].
3) Remove the 6 claws [2], and detach the scanner cover unit [3].
0007-8081
[5]
F-3-356
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[2]
[1]
[3]
[3]
[2]
[2]
F-3-357
3.3.4.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
[2]
F-3-354
0007-8096
[1]
3.3.4 CCD Unit
3.3.4.1 Removing the Rear Cover
0007-8095
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[2]
F-3-358
[3]
[3]
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
[2]
F-3-355
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
F-3-359
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
3-55
Chapter 3
[2]
[1]
[2]
[1]
[2]
F-3-364
[1]
F-3-360
3.3.4.5 Removing the ADF Unit
3.3.4.3 Removing the NCU Board
0007-8097
1) Remove the 4 screws [1], and open the NCU unit [2].
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0007-8098
[1]
[2]
[1]
[1]
[3]
[2]
F-3-361
2) Disconnect the flat cable [1] and the 2 connectors [2]; then, remove the 4
screws [3], and detach the NCU board [4].
[4]
F-3-365
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
[3]
[4]
[1]
[2]
[2]
[3]
F-3-362
3.3.4.4 Removing the SCNT Board Unit
[1]
[2]
0008-9017
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
F-3-366
[1]
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
[1]
[D]
[1]
[C]
[A]
[1]
[B]
[2]
F-3-363
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[A]
[B]
F-3-367
3-56
[C]
Chapter 3
3.3.4.6 Removing the operation Panel
0007-8099
[2]
1) Remove the 2 screws [1], and free the 2 claws [2] (left/right) to open the
operation panel [3].
[1]
[3]
[2]
[4]
[1]
[2]
[5]
[3]
F-3-371
F-3-368
2) Disconnect the 2 flat cables [1], and remove the 2 fastons [2]; then, detach
the operation panel [3].
[2]
[3]
[1]
[2]
3.3.4.9 Removing the CCD Unit
0007-8104
1) Push the claw [1], and free the core [3] and the flat cable [4] from the claw
[2]; then, disconnect the connector [5].
2) Pull out the flat cable [4] from the core [3] and the flat cable retainer [6]
by pulling it in the direction of the arrow.
3) Lift the shaft [7] to detach it from the groove; then, detach the CCD unit
[8].
[3]
[5]
[1]
[3]
F-3-369
3.3.4.7 Removing the Scanner Cover Unit
1) Remove the copyboard cover.
2) Remove the 2 screws [1].
3) Remove the 6 claws [2], and detach the scanner cover unit [3].
[1]
0007-8101
[2]
[4]
[3]
[3]
[2]
[6]
[4]
[2]
[2]
F-3-370
[7]
3.3.4.8 Removing the Flat Bed Motor Unit
[8]
0008-9018
1) Remove the screw [1], and detach the plate [2].
2) Remove the 2 screws [3], and detach the flat bed motor unit [5] while
paying attention to the drive belt [4] of the CCD unit.
F-3-372
3.3.5 Separation Guide Unit
3.3.5.1 Removing the Rear Cover
0009-9017
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-57
Chapter 3
[2]
[1]
[1]
[3]
[3]
[2]
F-3-377
[2]
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
F-3-373
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
[4]
[1]
F-3-378
[5]
3.3.5.3 Removing the SCNT Board Unit
F-3-374
0009-9019
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[1]
[3]
[3]
[1]
[2]
[2]
F-3-375
F-3-379
3.3.5.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0009-9018
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[1]
[2]
[1]
[2]
[3]
F-3-376
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[1]
[2]
F-3-380
3.3.5.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
3-58
0009-9020
Chapter 3
3.3.5.6 Removing the Document Pickup Roller Unit
[1]
0009-9016
1) Remove the following claws in the order indicated, and detach the ADF
rear cover [3]: claw [1], claw [2], claw [3].
[2]
[3]
[2]
[3]
[4]
F-3-381
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
[1]
[4]
F-3-385
2) Remove the 2 screws [1], and detach the harness guide [2] and the
Document feed motor unit [3].
[1]
[1]
[2]
F-3-382
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
[D]
[1]
[3]
[2]
F-3-386
[C]
3) Remove the spring [1] and the screw [2], and detach the arm [3].
[A]
[3]
[2]
[1]
[B]
[A]
[B]
[C]
F-3-383
F-3-387
3.3.5.5 Points to Note When Mounting the ADF Unit
0009-9021
Be sure to observe the following when mounting the ADF unit:
If the harness [1] is too taut, a break in the line can occur. Be sure there is
some slack when the ADF unit [2] is fully open.
4) Remove the 2 screws [1], and detach the drive unit [2].
[1]
[2]
[1]
[2]
F-3-388
F-3-384
5) Remove the spring [1], and detach the arm [2].
3-59
Chapter 3
[1]
[2]
[4]
F-3-389
6) Remove the 2 gears [1] [3]; then, detach the 2 bearings [2] [4], and detach
the pickup roller unit [5].
[5]
[1] [2]
F-3-393
[4] [3]
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[5]
F-3-390
[3]
[3]
3.3.5.7 Removing the Separation guide unit
0009-8765
1) Remove the Separation guide unit [1].
[1]
[2]
F-3-394
3.3.6.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0009-9001
[1]
F-3-391
3.3.6 Feed Roller
3.3.6.1 Removing the Rear Cover
0009-9000
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[2]
F-3-395
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[3]
[1]
[3]
[2]
[2]
F-3-392
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-396
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
3-60
Chapter 3
[2]
[1]
[2]
[1]
F-3-397
F-3-401
3.3.6.3 Removing the SCNT Board Unit
0009-9002
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
[D]
[1]
[1]
[C]
[A]
[1]
[B]
[1]
[2]
F-3-398
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[A]
[B]
[C]
F-3-402
[1]
3.3.6.5 Points to Note When Mounting the ADF Unit
[2]
0009-9004
Be sure to observe the following when mounting the ADF unit:
If the harness [1] is too taut, a break in the line can occur. Be sure there is
some slack when the ADF unit [2] is fully open.
[2]
[1]
[1]
[2]
F-3-399
3.3.6.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0009-9003
F-3-403
[1]
[2]
3.3.6.6 Removing the Document feed roller
0009-8998
1) Remove the following claws in the order indicated, and detach the ADF
rear cover [3]: claw [1], claw [2], claw [3].
[3]
[4]
F-3-400
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
3-61
Chapter 3
[1]
[2]
[3]
[2]
F-3-408
[1]
[4]
6) Remove the 2 screws [1], and detach the ADF inside cover [2].
F-3-404
2) Remove the 2 screws [1], and detach the harness guide [2] and the
Document feed motor unit [3].
[2]
[1]
[1]
F-3-409
7) Remove the claw [1], and detach the gear [2] and the bearing [3].
[1]
[3]
[2]
[2]
F-3-405
[3]
3) Remove the spring [1] and the screw [2], and detach the arm [3].
[3]
[2]
[1]
F-3-410
8) Remove the claw [1], and detach the gear [2] and the bearing [3].
[1]
[2]
[3]
F-3-406
4) Remove the 2 screws [1], and detach the drive unit [2].
[1]
F-3-411
9) Remove the E-ring [1], and slide the shaft [2] in the direction of the arrow
to detach the feed roller [3].
Note:
When removing the feed roller, pay attention to the parallel pin [4] of the
shaft.
[2]
F-3-407
5) Remove the spring [1], and detach the arm [2].
3-62
Chapter 3
[2]
[3]
[1]
[1]
[3]
[3]
[4]
[2]
F-3-415
3.3.7.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
F-3-412
0009-9007
[1]
3.3.7 Pickup Roller Unit
3.3.7.1 Removing the Rear Cover
0009-9006
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[2]
F-3-416
[3]
[3]
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
[2]
F-3-413
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
[4]
F-3-417
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[2]
[5]
F-3-414
4) Close the reader assembly; then, detach the rear cover[1].
[1]
F-3-418
3.3.7.3 Removing the SCNT Board Unit
0009-9008
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
3-63
Chapter 3
[1]
[D]
[1]
[C]
[1]
[A]
[B]
[1]
[2]
F-3-419
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[1]
[A]
[B]
[C]
F-3-423
[2]
3.3.7.5 Points to Note When Mounting the ADF Unit
0009-9010
Be sure to observe the following when mounting the ADF unit:
If the harness [1] is too taut, a break in the line can occur. Be sure there is
some slack when the ADF unit [2] is fully open.
[2]
[1]
[2]
[1]
F-3-420
3.3.7.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0009-9009
[1]
[2]
F-3-424
3.3.7.6 Removing the Document Pickup Roller Unit
0009-8756
1) Remove the following claws in the order indicated, and detach the ADF
rear cover [3]: claw [1], claw [2], claw [3].
[3]
[3]
[2]
[4]
F-3-421
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
[1]
[4]
F-3-425
2) Remove the 2 screws [1], and detach the harness guide [2] and the
Document feed motor unit [3].
[1]
[2]
F-3-422
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
3-64
Chapter 3
[1]
[1] [2]
[4] [3]
[5]
F-3-430
3.3.8 Reader Unit
3.3.8.1 Removing the Rear Cover
0007-8454
[3]
[2]
F-3-426
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3) Remove the spring [1] and the screw [2], and detach the arm [3].
[3]
[2]
[1]
[1]
[3]
[3]
[2]
F-3-431
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-427
4) Remove the 2 screws [1], and detach the drive unit [2].
[1]
[4]
[2]
[5]
F-3-428
5) Remove the spring [1], and detach the arm [2].
F-3-432
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[2]
[3]
[3]
[2]
F-3-429
6) Remove the 2 gears [1] [3]; then, detach the 2 bearings [2] [4], and detach
the pickup roller unit [5].
F-3-433
3.3.8.2 Removing the Reader Assembly
0007-8455
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
3-65
Chapter 3
[2]
[1]
[2]
[1]
F-3-437
[1]
5) Remove the 6 screws [1], and lift the reader unit to detach.
[2]
[2]
[1]
F-3-434
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
F-3-438
3.3.9 Flatbed Motor Unit
3.3.9.1 Removing the Rear Cover
0007-8082
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[3]
[3]
F-3-435
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[2]
F-3-439
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[2]
[3]
F-3-436
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[5]
F-3-440
4) Close the reader assembly; then, detach the rear cover[1].
3-66
Chapter 3
[1]
[1]
[1]
[3]
[3]
[1]
[2]
[2]
F-3-441
F-3-445
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
3.3.9.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8084
[1]
[2]
[1]
[1]
[3]
[2]
[2]
F-3-446
F-3-442
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
3.3.9.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0007-8086
[1]
[2]
[2]
[3]
F-3-443
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[4]
F-3-447
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
[2]
[1]
F-3-444
[1]
[2]
3.3.9.3 Removing the SCNT Board Unit
0007-8085
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
F-3-448
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
3-67
Chapter 3
[D]
[1]
[1]
[3]
[2]
[C]
[A]
[B]
[2]
[A]
[B]
[C]
F-3-449
[2]
3.3.9.5 Removing the operation Panel
F-3-452
0007-8087
1) Remove the 2 screws [1], and free the 2 claws [2] (left/right) to open the
operation panel [3].
3.3.9.7 Removing the Flat Bed Motor Unit
0007-8090
[3]
1) Remove the screw [1], and detach the plate [2].
2) Remove the 2 screws [3], and detach the flat bed motor unit [5] while
paying attention to the drive belt [4] of the CCD unit.
[2]
[2]
[2]
[1]
[1]
F-3-450
2) Disconnect the 2 flat cables [1], and remove the 2 fastons [2]; then, detach
the operation panel [3].
[2]
[1]
[2]
[4]
[3]
[5]
[3]
F-3-453
3.3.10 Document Feed Motor
3.3.10.1 Removing the Rear Cover
0009-9011
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[3]
[1]
F-3-451
3.3.9.6 Removing the Scanner Cover Unit
1) Remove the copyboard cover.
2) Remove the 2 screws [1].
3) Remove the 6 claws [2], and detach the scanner cover unit [3].
0007-8089
[3]
[3]
[2]
F-3-454
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-68
Chapter 3
[2]
[4]
[1]
F-3-459
[5]
3.3.10.3 Removing the SCNT Board Unit
F-3-455
4) Close the reader assembly; then, detach the rear cover[1].
0009-9013
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
[1]
[1]
[1]
[3]
[3]
[1]
[2]
[2]
F-3-456
F-3-460
3.3.10.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0009-9012
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
[1]
[1]
[2]
[3]
[2]
[1]
F-3-457
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
[2]
F-3-461
3.3.10.4 Removing the ADF Unit
1) Open the ADF unit [1], and detach the stopper [2].
2) Remove the 3 claws [3], and detach the ADF front cover [4].
0009-9014
[1]
[2]
[2]
F-3-458
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[3]
[4]
F-3-462
3) Remove the ferrite core [1] from behind the scanner unit; then, free the
harness from the tape [2].
3-69
Chapter 3
[3]
[2]
[1]
[2]
[1]
F-3-463
4) Open the ADF unit [1] as shown; then, disengage it starting with the rear
and then the front.
2) Remove the 2 screws [1], and detach the harness guide [2] and the
Document feed motor unit [3].
[1]
[D]
[1]
[4]
F-3-466
[C]
[A]
[B]
[3]
[A]
[B]
[2]
F-3-467
[C]
3) Remove the gear [1] and the 2 screws [2]; then, detach the Document feed
motor [3].
F-3-464
[1]
3.3.10.5 Points to Note When Mounting the ADF Unit
0009-9015
Be sure to observe the following when mounting the ADF unit:
If the harness [1] is too taut, a break in the line can occur. Be sure there is
some slack when the ADF unit [2] is fully open.
[2]
[1]
[2]
[3]
F-3-468
3.3.11 DS Sensor
3.3.11.1 Removing the ADF Paper Sensor
1) Remove the stopper [1], and fully open the ADF unit [2].
F-3-465
3.3.10.6 Removing the Document feed motor
[2]
0009-8759
1) Remove the following claws in the order indicated, and detach the ADF
rear cover [3]: claw [1], claw [2], claw [3].
[1]
F-3-469
2) Remove the 2 screws [1], and detach the ADF inside cover [2].
3-70
0010-3734
Chapter 3
[2]
[2]
[3]
[1]
[1]
F-3-474
F-3-470
3) Remove the 4 claws [1], and disconnect the connector [2]; then, detach the
ADF paper sensor [3].
4) Disconnect the connector [1], and remove the 4 claws [4]; then, detach the
ADF feed sensor [3].
[3]
[1]
[1]
[2]
[2]
F-3-475
[2]
3.3.13 Speaker
[3]
F-3-471
3.3.13.1 Removing the Rear Cover
3.3.12 DES Sensor
0007-8937
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3.3.12.1 Removing the ADF Feed Sensor
1) Remove the stopper [1], and fully open the ADF unit [2].
0010-3733
[1]
[2]
[1]
[3]
[3]
[2]
F-3-476
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-472
2) Remove the 2 screws [1], and detach the ADF inside cover [2].
[2]
[4]
[1]
F-3-473
3) Free the harness [1] from the guide, and remove the screw [2]; then, detach
the sensor unit [3].
[5]
F-3-477
4) Close the reader assembly; then, detach the rear cover[1].
3-71
Chapter 3
[1]
[1]
[1]
[3]
[3]
[1]
[2]
[2]
F-3-478
F-3-482
2) Open the SCNT board unit; then, disconnect the 6 connectors [1] and the
3 flat cables [2].
3.3.13.2 Removing the Scanner Unit
1) Remove the platen glass cover.
2) While removing the left and right claws, detach the hinge cover [1].
3) Remove the screw [2], and detach the cable guide [3].
0007-8938
[1]
[2]
[1]
[1]
[3]
[2]
[2]
F-3-483
F-3-479
4) Open the harness band [1], and free the 2 cables [2] connected to the
reader assembly.
[2]
[1]
3.3.13.4 Removing the Speaker
0007-9118
1) Remove the 2 screws [1], and detach the speaker cover [2]; then, detach
the speaker [3].
[1]
[2]
[2]
[3]
F-3-480
5) Remove the 2 screws [1] from the back; then, shift the scanner unit [2] to
the back, and lift it to detach.
[2]
F-3-484
3.4 LASER EXPOSURE SYSTEM
3.4.1 Laser/Scanner Unit
3.4.1.1 Removing the Rear Cover
0007-7964
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
F-3-481
3.3.13.3 Removing the SCNT Board Unit
0007-8940
1) Remove the 8 screws [1] from behind the scanner unit, and shift up the
SCNT board unit [2].
3-72
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-485
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-489
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-486
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-490
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-487
3.4.1.2 Removing the Reader Assembly
0007-8482
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-491
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-488
3-73
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-496
F-3-492
3.4.1.5 Removing the Power Supply Assembly
3.4.1.3 Removing the Right Cover
0007-7966
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-7968
[1]
[1]
[1]
F-3-493
[1]
[2]
F-3-497
[3]
3.4.1.6 Removing the Face-Down Cover
0007-7970
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-494
3.4.1.4 Removing the Left Cover
0007-7967
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-498
3.4.1.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[1]
F-3-495
3-74
0007-7971
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-499
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-501
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-502
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-500
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-503
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-75
Chapter 3
[1]
[1]
[3]
[3]
[2]
F-3-507
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
F-3-504
3.4.1.8 Removing the Laser Scanner Unit
[2]
[4]
0007-7972
1) Remove the face-down sub cover [1].
2) Disconnect the 3 connectors [2].
[1]
[5]
F-3-508
4) Close the reader assembly; then, detach the rear cover[1].
[2]
[1]
F-3-505
3) Remove the 4 screws [1], and free the harness [3] from the harness guide
[2]; then, detach the laser scanner unit [4].
[1]
[3]
[3]
[2]
F-3-509
3.5.1.2 Removing the Reader Assembly
0007-8574
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
[3]
[4]
[2]
F-3-506
3.5 IMAGE FORMATION SYSTEM
3.5.1 Rotary Drive Unit
3.5.1.1 Removing the Rear Cover
[1]
0007-8555
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[2]
[2]
F-3-510
3-76
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
[1]
F-3-514
3.5.1.3 Removing the Right Cover
0007-8593
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-511
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-515
[2]
[3]
[3]
[2]
F-3-512
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
F-3-516
3.5.1.4 Removing the Left Cover
[2]
0007-8617
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-513
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-517
3-77
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-521
F-3-518
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.1.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8637
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-519
3.5.1.6 Removing the Face-Down Cover
0007-8659
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-522
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-520
3.5.1.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-78
[3]
0007-8677
Chapter 3
[1]
[1]
[2]
[2]
F-3-526
3.5.1.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6595
F-3-523
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-524
[1]
F-3-527
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.5.1.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6616
[1]
[2]
[2]
F-3-528
3.5.1.10 Removing the Rotary Drive Assembly
F-3-525
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
0007-8835
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-79
Chapter 3
[2]
[4]
[5]
F-3-532
[1]
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[1]
[3]
[3]
F-3-529
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
[2]
[2]
[1]
[2]
[2]
[3]
F-3-533
3.5.2.2 Removing the Reader Assembly
0007-8584
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
F-3-530
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
[1]
[1]
3.5.2 Drum Cartridge Memory Tag Contact
[2]
3.5.2.1 Removing the Rear Cover
0007-8564
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[2]
F-3-531
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-80
[2]
F-3-534
When closing the reader assembly, be sure to push in the arm [1] first.
Chapter 3
[1]
[1]
[1]
F-3-538
[1]
3.5.2.3 Removing the Right Cover
0007-8608
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-535
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-539
[3]
[2]
[2]
F-3-536
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-540
F-3-537
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.5.2.4 Removing the Left Cover
0007-8627
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-541
3-81
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-545
F-3-542
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.2.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8638
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-543
3.5.2.6 Removing the Face-Down Cover
0007-8660
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-546
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-544
3.5.2.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-82
[3]
0007-8678
Chapter 3
[1]
[1]
[2]
[2]
F-3-550
3.5.2.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6596
F-3-547
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-548
[1]
F-3-551
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.5.2.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6617
[1]
[2]
[2]
F-3-552
3.5.2.10 Removing the Inside Cover
F-3-549
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-8910
[2]
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[1]
F-3-553
3-83
Chapter 3
3.5.2.11 Removing the Drum Cartridge Memory Tag
Contact
0007-8911
1) Disconnect the connector [1] from the DC controller board; then, free the
harness from the guide [2].
[1]
[4]
[2]
[3]
[5]
F-3-557
4) Close the reader assembly; then, detach the rear cover[1].
[2]
F-3-554
[1]
2) Remove the 2 claws [1], and detach the drum cartridge memory tag
contact [2].
[1]
[2]
[1]
[3]
[3]
[2]
F-3-558
3.5.3.2 Removing the Reader Assembly
F-3-555
0007-8573
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
3.5.3 Developing Rotary Unit
3.5.3.1 Removing the Rear Cover
0007-8561
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[1]
[1]
[2]
[2]
F-3-556
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
F-3-559
When closing the reader assembly, be sure to push in the arm [1] first.
3-84
Chapter 3
[1]
[1]
[1]
F-3-563
[1]
3.5.3.3 Removing the Right Cover
0007-8603
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-560
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-564
[3]
[2]
[2]
F-3-561
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-565
F-3-562
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.5.3.4 Removing the Left Cover
0007-8624
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-566
3-85
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-570
F-3-567
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.3.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8640
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-568
3.5.3.6 Removing the Face-Down Cover
0007-8661
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-571
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-569
3.5.3.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-86
[3]
0007-8679
Chapter 3
[1]
[1]
[2]
[2]
F-3-575
3.5.3.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6597
F-3-572
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-573
[1]
F-3-576
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.5.3.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6618
[1]
[2]
[2]
F-3-577
3.5.3.10 Removing the Inside Cover
F-3-574
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-8843
[2]
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[1]
F-3-578
3-87
Chapter 3
3.5.3.11 Removing the Registration Clutch
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
0007-8844
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
[1]
[2]
[2]
[4]
[2]
[3]
[3]
[1]
F-3-579
[1]
[1]
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3.5.3.12 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
0007-8845
[2]
F-3-583
[1]
3.5.3.13 Removing the Rotary Drive Assembly
[2]
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
0007-8846
[2]
F-3-580
2) Remove the 2 screws [1], and detach the front sub cover [2].
[1]
[2]
[1]
F-3-581
[1]
[1]
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[2]
[1]
F-3-582
3-88
F-3-584
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
Chapter 3
[2]
[1]
[2]
[3]
[2]
[1]
F-3-588
2) Free the harness [1] from the harness guide [2].
3) Disconnect the connector [3], and remove the 8 screws [4]; then, detach
the laser scanner base [5]
F-3-585
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
[4]
3.5.3.14 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
0007-8810
[2]
[4]
[2]
[3]
[1]
F-3-586
[5]
3.5.3.15 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
[1]
[4]
[1]
0007-8847
[3]
F-3-589
3.5.3.17 Removing the Developing Rotary Assembly
0007-8850
1) Remove the 2 screws [1].
2) Push in the top [2] of the rotary holder toward the inside of the machine
using the tip of a screwdriver to see that the holder has been disengaged
from the machine.
[1]
[1]
[2]
[1]
F-3-587
3.5.3.16 Removing the Laser Scanner Unit Base
1) Disconnect the 6 connectors [1] of the DC controller board.
0007-8849
[2]
F-3-590
3-89
Chapter 3
3) While pushing the boss [1], release the rotary release lever (right) [2] in
upward direction.
[1]
[3]
[3]
[2]
F-3-594
[2]
[1]
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
F-3-591
4) While pushing the boss [1], release the rotary release lever (left) [2] in
upward direction.
[5]
F-3-595
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[2]
[3]
[3]
F-3-592
5) While paying attention to the engagement of the rotary release lever (left/
right) [1], lift the developing rotary assembly [2] to detach.
[2]
F-3-596
[1]
3.5.4.2 Removing the Reader Assembly
[1]
0007-8580
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-593
[1]
When mounting the developing rotary assembly, be sure that the 2 tips of the
rotary holder are fully fitted to the frame of the machine.
[1]
3.5.4 Engaging Motor
[2]
3.5.4.1 Removing the Rear Cover
[2]
0007-8560
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-90
F-3-597
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
[1]
F-3-601
3.5.4.3 Removing the Right Cover
0007-8602
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-598
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-602
[2]
[3]
[3]
[2]
F-3-599
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
F-3-603
3.5.4.4 Removing the Left Cover
[2]
0007-8623
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-600
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-604
3-91
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-608
F-3-605
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.4.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8641
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-606
3.5.4.6 Removing the Face-Down Cover
0007-8662
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-609
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-607
3.5.4.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-92
[3]
0007-8680
Chapter 3
[1]
[1]
[2]
[2]
F-3-613
3.5.4.8 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
0007-8811
F-3-610
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-611
[1]
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
F-3-614
3.5.4.9 Removing the Shift Motor
[2]
[1]
1) Disconnect the connector [1], and remove the 2 screws [2].
2) Slide the shift motor [3] in upward direction to detach.
0007-8880
[2]
[1]
[3]
[2]
F-3-615
F-3-612
3.5.5 Developing Rotary Motor
3.5.5.1 Removing the Rear Cover
0007-8557
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-93
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-616
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-620
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-617
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-621
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-618
3.5.5.2 Removing the Reader Assembly
0007-8576
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-622
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-619
3-94
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-627
F-3-623
3.5.5.5 Removing the Power Supply Assembly
3.5.5.3 Removing the Right Cover
0007-8596
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8643
[1]
[1]
[1]
F-3-624
[1]
[2]
F-3-628
[3]
3.5.5.6 Removing the Face-Down Cover
0007-8664
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-625
3.5.5.4 Removing the Left Cover
0007-8620
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-629
3.5.5.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8681
[1]
F-3-626
3-95
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-630
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-632
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-633
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-631
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-634
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-96
Chapter 3
[2]
[1]
[2]
[1]
F-3-635
3.5.5.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6598
[1]
[1]
[1]
[2]
F-3-638
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
[2]
[1]
[2]
[2]
[3]
[1]
F-3-636
3.5.5.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6619
[1]
F-3-639
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
[2]
[2]
3.5.5.11 Removing the Developing Rotary Motor
0007-8870
1) Remove the 2 screws [1], and detach the toner cartridge motor [2] from
the rotary drive assembly.
F-3-637
3.5.5.10 Removing the Rotary Drive Assembly
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
0007-8869
[2]
[1]
F-3-640
3.5.6 Developing Rotary Stopper Solenoid
3.5.6.1 Removing the Rear Cover
1) Disconnect the cable [1] of the power supply assembly.
0007-8558
3-97
Chapter 3
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-641
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-645
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[5]
F-3-642
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-646
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-643
3.5.6.2 Removing the Reader Assembly
0007-8567
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-647
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-644
3-98
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-652
F-3-648
3.5.6.5 Removing the Power Supply Assembly
3.5.6.3 Removing the Right Cover
0007-8598
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8644
[1]
[1]
[1]
F-3-649
[1]
[2]
F-3-653
[3]
3.5.6.6 Removing the Face-Down Cover
0007-8665
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-650
3.5.6.4 Removing the Left Cover
0007-8621
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-654
3.5.6.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8682
[1]
F-3-651
3-99
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-655
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-657
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-658
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-656
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-659
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-100
Chapter 3
[2]
[1]
[2]
[1]
F-3-660
3.5.6.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6599
[1]
[1]
[1]
[2]
F-3-663
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
[2]
[1]
[2]
[3]
[2]
[1]
F-3-661
3.5.6.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6620
[1]
F-3-664
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
[2]
[2]
3.5.6.11 Removing the Toner Cartridge Motor
0007-8873
1) Disconnect the connector [1], and remove the screw [2]; then, detach the
toner cartridge motor [3] from the rotary drive assembly.
F-3-662
[3]
3.5.6.10 Removing the Rotary Drive Assembly
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
[2]
0007-8872
[1]
F-3-665
3.5.6.12 Removing the Developing Rotary Motor
0007-8874
1) Remove the 2 screws [1], and detach the toner cartridge motor [2] from
the rotary drive assembly.
3-101
Chapter 3
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[2]
[1]
F-3-666
3.5.6.13 Removing the Developing Rotary Stopper
Solenoid
0007-8875
1) Remove the 3 screws [1], and detach the motor base [2] from the rotary
drive assembly.
[5]
F-3-670
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
[3]
[3]
[2]
F-3-671
[1]
[2]
F-3-667
2) Remove the screw [1], and detach the developing rotary stopper solenoid
[2] from the rotary drive assembly.
[1]
3.5.7.2 Removing the Reader Assembly
0007-8569
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
[1]
[1]
F-3-668
3.5.7 Density Detection PCB
[2]
[2]
3.5.7.1 Removing the Rear Cover
0007-8551
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[2]
F-3-669
3-102
F-3-672
When closing the reader assembly, be sure to push in the arm [1] first.
Chapter 3
[1]
[1]
[1]
F-3-676
[1]
3.5.7.3 Removing the Right Cover
0007-8589
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-673
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-677
[3]
[2]
[2]
F-3-674
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-678
F-3-675
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.5.7.4 Removing the Left Cover
0007-8612
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-679
3-103
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-683
F-3-680
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.7.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8645
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-681
3.5.7.6 Removing the Face-Down Cover
0007-8666
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-684
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-682
3.5.7.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-104
[3]
0007-8683
Chapter 3
[1]
[1]
[2]
[2]
F-3-688
3.5.7.8 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-8856
F-3-685
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
[1]
F-3-689
F-3-686
3.5.7.9 Removing the Dust-Blocking Cover
1) Remove the claw [1], and detach the dust-blocking cover [2].
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
0007-8858
[2]
[1]
[1]
F-3-690
3.5.7.10 Removing the Density Detection PCB
0007-8859
F-3-687
1) Remove the 2 screws [1], and disconnect the connector [2]; then, detach
the density detection PCB [3].
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-105
Chapter 3
3.5.8.2 Removing the Reader Assembly
[2]
[1]
0007-8570
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[3]
[1]
F-3-691
3.5.8 ITB Home Position Detection PCB
[2]
3.5.8.1 Removing the Rear Cover
[2]
0007-8552
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
F-3-695
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[2]
F-3-692
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-696
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-693
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-697
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-694
3-106
Chapter 3
[2]
[1]
[2]
F-3-698
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-702
[1]
[3]
[2]
[1]
[2]
[1]
F-3-699
F-3-703
3.5.8.3 Removing the Right Cover
0007-8590
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
3.5.8.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8646
[1]
[1]
[1]
F-3-700
[2]
[1]
[3]
F-3-704
3.5.8.6 Removing the Face-Down Cover
0007-8667
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[2]
[1]
[2]
F-3-701
3.5.8.4 Removing the Left Cover
0007-8613
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-705
3-107
Chapter 3
3.5.8.7 Removing the Top Cover
0007-8684
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[1]
[4]
[2]
[1]
[2]
F-3-706
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-708
Enlarged View of the Paper Retainer
[2]
OK
NG
[1]
[1]
[4]
[3]
[3]
F-3-709
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-707
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-710
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-108
Chapter 3
[1]
[1]
[2]
F-3-714
2) Remove the 2 screws [1], and detach the transfer inlet guide [2].
[1]
[2]
F-3-711
3.5.8.8 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-8860
[2]
[2]
F-3-715
3) Remove the 2 claws [1] of the left and right bushings; then, detach the
transfer charging roller [2].
[2]
[1]
F-3-712
3.5.8.9 Removing the ITB Home Position Detection PCB
0007-8861
1) Remove the test print switch lever [1].
2) Remove the screw [2], and disconnect the connector [3]; then, detach the
ITB home position detection PCB [4].
[1]
[2]
F-3-716
3) Remove the gear [1] and the bushing [2]; then, detach the transfer
charging roller.
[1]
[3]
[1]
[4]
F-3-713
[2]
F-3-717
3.5.9 Transfer Charging Roller
3.5.9.1 Removing the Transfer Charging Roller
1) Open the reader assembly [1] and the top cover [2].
0007-7129
When replacing the transfer charging roller, be sure to hold it by its shaft [1]
and its bushing [2]; be sure never to touch the sponge segment [3]. Also,
when mounting the transfer charging roller, be sure that the spring is securely
fitted to the boss of the bushing so that the bushing pushes the spring.
3-109
Chapter 3
[3]
[1]
[3]
[1]
[3]
[1]
[2]
F-3-721
3.5.10.2 Removing the Reader Assembly
0007-8568
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-718
3.5.10 Waste toner Detection PCB
3.5.10.1 Removing the Rear Cover
0007-8550
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[1]
[1]
[2]
[2]
[3]
[3]
F-3-722
When closing the reader assembly, be sure to push in the arm [1] first.
[2]
F-3-719
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
[5]
F-3-720
4) Close the reader assembly; then, detach the rear cover[1].
F-3-723
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
3-110
Chapter 3
[1]
[2]
[3]
[2]
[3]
[2]
F-3-724
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-728
3.5.10.4 Removing the Left Cover
[1]
0007-8611
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[2]
F-3-725
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
F-3-729
[3]
[1]
[2]
[1]
F-3-726
3.5.10.3 Removing the Right Cover
[2]
0007-8588
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-730
3.5.10.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
0007-8647
[1]
F-3-727
3-111
Chapter 3
[1]
[2]
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-731
3.5.10.6 Removing the Face-Down Cover
0007-8668
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[3]
F-3-734
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-732
[1]
3.5.10.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
0007-8685
[4]
[2]
[1]
[2]
F-3-733
F-3-735
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-736
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
3-112
Chapter 3
[2]
[1]
[4]
[2]
[3]
[1]
F-3-740
F-3-737
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3.5.10.10 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
[1]
0007-8833
[2]
[1]
F-3-741
2) Remove the 2 screws [1], and detach the front sub cover [2].
[2]
F-3-738
3.5.10.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6600
[2]
[1]
[2]
[1]
F-3-742
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[2]
[1]
[1]
F-3-739
3.5.10.9 Removing the Registration Clutch
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
0007-8827
F-3-743
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
3-113
Chapter 3
[1]
[4]
[2]
[2]
[3]
[1]
[5]
[1]
F-3-747
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[2]
F-3-744
[3]
3.5.10.11 Removing the Waste Toner Detection PCB
[3]
0007-8855
1) Disconnect the connector (J108) [1] of the DC controller box; then, free
the harness from the harness clamp [2].
2) Remove the screw [3], and detach the waste toner detection PCB.
[4]
[2]
[3]
[1]
[2]
[2]
F-3-748
3.5.11.2 Removing the Reader Assembly
0007-8587
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-745
3.5.11 Developing Rotary/Toner Level Detection PCB
[1]
3.5.11.1 Removing the Rear Cover
[1]
0007-8549
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[2]
[2]
[1]
F-3-749
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[3]
[2]
F-3-746
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-114
Chapter 3
[1]
[1]
[1]
F-3-753
[1]
3.5.11.3 Removing the Right Cover
0007-8586
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-750
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-754
[3]
[2]
[2]
F-3-751
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-755
F-3-752
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.5.11.4 Removing the Left Cover
0007-8610
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-756
3-115
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-760
F-3-757
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.5.11.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8655
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-758
3.5.11.6 Removing the Face-Down Cover
0007-8669
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-761
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-759
3.5.11.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-116
[3]
0007-8686
Chapter 3
[1]
[1]
[2]
[2]
F-3-765
3.5.11.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6601
F-3-762
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-763
[1]
F-3-766
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.5.11.9 Removing the Registration Clutch
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
[4]
F-3-764
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
[2]
[3]
0007-8826
[1]
F-3-767
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3.5.11.10 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
0007-8832
3-117
Chapter 3
[1]
[1]
[2]
[2]
F-3-768
[2]
2) Remove the 2 screws [1], and detach the front sub cover [2].
[3]
[1]
[1]
[2]
[2]
[1]
F-3-771
F-3-769
3.5.11.11 Removing the Rotary Drive Assembly
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
0007-8836
[2]
[2]
[1]
F-3-770
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
[1]
[1]
[1]
F-3-772
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
3-118
Chapter 3
[2]
[1]
[2]
[3]
[2]
[1]
F-3-776
2) Free the harness [1] from the harness guide [2].
3) Disconnect the connector [3], and remove the 8 screws [4]; then, detach
the laser scanner base [5]
F-3-773
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
[4]
3.5.11.12 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
0007-8837
[2]
[4]
[2]
[3]
[1]
F-3-774
[5]
3.5.11.13 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
[1]
[4]
[1]
0007-8838
[3]
F-3-777
3.5.11.15 Removing the Developing Rotary Assembly
0007-8852
1) Remove the 2 screws [1].
2) Push in the top [2] of the rotary holder toward the inside of the machine
using the tip of a screwdriver to see that the holder has been disengaged
from the machine.
[1]
[1]
[2]
[1]
F-3-775
3.5.11.14 Removing the Laser Scanner Unit Base
1) Disconnect the 6 connectors [1] of the DC controller board.
0007-8851
[2]
F-3-778
3-119
Chapter 3
3) While pushing the boss [1], release the rotary release lever (right) [2] in
upward direction.
[1]
[2]
[2]
[1]
F-3-782
3.5.12 Toner Cartridge Motor
3.5.12.1 Removing the Rear Cover
0007-8556
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
F-3-779
4) While pushing the boss [1], release the rotary release lever (left) [2] in
upward direction.
[1]
[3]
[3]
[2]
F-3-783
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[1]
[2]
[4]
F-3-780
5) While paying attention to the engagement of the rotary release lever (left/
right) [1], lift the developing rotary assembly [2] to detach.
[1]
[1]
[2]
[5]
F-3-784
4) Close the reader assembly; then, detach the rear cover[1].
[1]
F-3-781
When mounting the developing rotary assembly, be sure that the 2 tips of the
rotary holder are fully fitted to the frame of the machine.
[3]
3.5.11.16 Removing the Developing Rotary/Toner Level
Detection PCB
[2]
0007-8854
1) Remove the 3 claws [1], and detach the developing rotary/toner level
detection PCB [2] from the developing rotary assembly.
3-120
[3]
F-3-785
Chapter 3
3.5.12.2 Removing the Reader Assembly
[2]
0007-8575
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[2]
F-3-789
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[1]
[2]
F-3-786
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[1]
F-3-790
3.5.12.3 Removing the Right Cover
0007-8594
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-787
[1]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
F-3-791
[2]
[3]
[1]
[2]
[2]
[3]
F-3-788
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
F-3-792
3.5.12.4 Removing the Left Cover
0007-8619
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
3-121
Chapter 3
3.5.12.7 Removing the Top Cover
0007-8687
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[4]
[1]
F-3-793
[1]
[2]
F-3-797
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
[3]
[2]
[2]
[1]
[2]
[1]
F-3-794
[4]
3.5.12.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8648
[1]
[1]
[3]
F-3-798
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
[1]
F-3-795
3.5.12.6 Removing the Face-Down Cover
0007-8670
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
F-3-796
3-122
Chapter 3
[1]
[1]
[2]
[2]
F-3-802
3.5.12.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6602
F-3-799
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-800
[1]
F-3-803
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.5.12.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6621
[1]
[2]
[2]
F-3-804
3.5.12.10 Removing the Rotary Drive Assembly
F-3-801
1) Disconnect the 4 connectors [1], and remove the 2 screws [2].
0007-8865
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-123
Chapter 3
3.6 PICKUP AND FEEDING SYSTEM
[2]
3.6.1 Cassette Pickup Roller
3.6.1.1 Removing the Cassettes
0007-7056
1) Hold the grip, and take out the cassette.
3.6.1.2 Removing the Rear Cover
0007-7057
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[1]
[3]
[2]
[1]
[1]
F-3-808
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-805
2) Disconnect the connector [1], and remove the 3 screws [2]; then, detach
the rotary drive assembly [3].
[2]
[1]
[2]
[3]
[4]
[2]
[5]
F-3-809
4) Close the reader assembly; then, detach the rear cover[1].
F-3-806
[1]
Be sure to tighten the self-tapping screw used to secure the rotary drive assembly only at the end of the work.
3.5.12.11 Removing the Toner Cartridge Motor
0007-8867
[3]
[3]
1) Disconnect the connector [1], and remove the screw [2]; then, detach the
toner cartridge motor [3] from the rotary drive assembly.
[3]
[2]
[2]
F-3-810
3.6.1.3 Removing the Right Cover
0007-7059
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
[1]
F-3-807
3-124
Chapter 3
[1]
F-3-815
3) Lift the release knob [1] slightly, and turn it bout 90 deg toward the rear;
then, slide the release knob fully.
[1]
F-3-811
[2]
[3]
[1]
[2]
F-3-816
4) Slide the pickup roller [1] fully; then, slide the pickup roller at an angle in
downward direction to detach.
F-3-812
3.6.1.4 Removing the Left Cover
0007-7060
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-817
3.6.2 Cassette Paper Sensor
3.6.2.1 Removing the Cassettes
0007-8545
1) Hold the grip, and take out the cassette.
[1]
3.6.2.2 Removing the Rear Cover
F-3-813
0007-8562
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[2]
[3]
[3]
[2]
[2]
F-3-818
3) Open the reader assembly [4], and lift to free the 2 claws [5].
F-3-814
3.6.1.5 Removing the Cassette Pickup Roller
0007-7053
1) Shift down the machine to the left.
2) While lifting the release knob [1] slightly, turn it about 90 deg toward the
front; then, slide the release knob to detach.
3-125
Chapter 3
[4]
[5]
F-3-819
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
F-3-822
[3]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[3]
[1]
[2]
F-3-820
3.6.2.3 Removing the Reader Assembly
0007-8582
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[3]
[2]
F-3-823
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[1]
[1]
[2]
[2]
[2]
F-3-824
F-3-821
When closing the reader assembly, be sure to push in the arm [1] first.
3-126
5) Remove the 6 screws [1], and lift the reader unit to detach.
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-829
F-3-825
3.6.2.6 Removing the Power Supply Assembly
3.6.2.4 Removing the Right Cover
0007-8604
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8649
[1]
[1]
[1]
F-3-826
[1]
[2]
F-3-830
[3]
3.6.2.7 Removing the Face-Down Cover
0007-8671
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-827
3.6.2.5 Removing the Left Cover
0007-8625
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-831
3.6.2.8 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8688
[1]
F-3-828
3-127
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-832
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-834
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-835
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-833
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-836
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-128
Chapter 3
[1]
[1]
F-3-840
[2]
3.6.2.12 Removing the Cassette Paper Sensor
F-3-837
0007-8882
1) Remove the 2 claws [1].
3.6.2.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6603
[1]
[2]
[1]
[1]
F-3-838
F-3-841
3.6.2.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
2) Disconnect the connector [1], and detach the paper sensor [2].
0007-8812
[2]
[2]
[1]
F-3-842
3.6.3 Cassette Feed Sensor
[1]
3.6.3.1 Removing the Cassettes
F-3-839
1) Hold the grip, and take out the cassette.
3.6.2.11 Removing the Cassette Feeder
1) Lift the machine, and detach the cassette feeder [1].
0007-8881
0007-8546
3.6.3.2 Removing the Rear Cover
0007-8563
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3-129
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-843
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-847
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-844
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-848
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-845
3.6.3.3 Removing the Reader Assembly
0007-8583
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-849
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-846
3-130
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-854
F-3-850
3.6.3.6 Removing the Power Supply Assembly
3.6.3.4 Removing the Right Cover
0007-8606
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8650
[1]
[1]
[1]
F-3-851
[1]
[2]
F-3-855
[3]
3.6.3.7 Removing the Face-Down Cover
0007-8672
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-852
3.6.3.5 Removing the Left Cover
0007-8626
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-856
3.6.3.8 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8689
[1]
F-3-853
3-131
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-857
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-859
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-860
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-858
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-861
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-132
Chapter 3
[1]
[1]
F-3-865
[2]
3.6.3.12 Removing the Cassette Feed Sensor
F-3-862
0007-8884
1) Remove the claw [1], and detach the sensor cover [2].
3.6.3.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6604
[1]
[2]
[1]
[2]
F-3-866
2) Remove the 2 claws [1], and detach the sensor cover [2].
[1]
F-3-863
[1]
3.6.3.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
0007-8813
[2]
[2]
[1]
F-3-867
3) Remove the 2 claws [1].
[1]
F-3-864
3.6.3.11 Removing the Cassette Feeder
1) Lift the machine, and detach the cassette feeder [1].
0007-8883
[1]
F-3-868
4) Disconnect the connector [1], and detach the cassette feed sensor [2].
3-133
Chapter 3
3.6.4.3 Removing the Reader Assembly
0007-8484
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
[1]
F-3-869
[1]
3.6.4 Cassette Pickup Solenoid
[1]
3.6.4.1 Removing the Cassettes
0007-7062
1) Hold the grip, and take out the cassette.
[2]
3.6.4.2 Removing the Rear Cover
[2]
0007-7063
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
F-3-873
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[2]
F-3-870
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-874
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-871
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-875
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-872
3-134
Chapter 3
[2]
[1]
[2]
F-3-876
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-880
[1]
[3]
[2]
[1]
[2]
[1]
F-3-877
F-3-881
3.6.4.4 Removing the Right Cover
0007-7065
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
3.6.4.6 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-7067
[1]
[1]
[1]
F-3-878
[2]
[1]
[3]
F-3-882
3.6.4.7 Removing the Face-Down Cover
0007-7069
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[2]
[1]
[2]
F-3-879
3.6.4.5 Removing the Left Cover
0007-7066
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-883
3-135
Chapter 3
3.6.4.8 Removing the Top Cover
0007-7073
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[1]
[4]
[2]
[1]
[2]
F-3-884
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-886
Enlarged View of the Paper Retainer
[2]
OK
NG
[1]
[1]
[4]
[3]
[3]
F-3-887
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-885
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-888
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-136
Chapter 3
[1]
[1]
F-3-892
[2]
3.6.4.12 Removing the Cassette Pickup Solenoid
F-3-889
0007-7098
1) Remove the 3 claws [1], and slide the PCB cover [2] to detach.
3.6.4.9 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6585
[1]
[2]
[1]
[2]
F-3-893
2) Remove the screw [1], and detach the dust-blocking plate [2].
[1]
F-3-890
3.6.4.10 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
0007-7077
[2]
[2]
[1]
F-3-894
3) Disconnect the connector [1].
4) Remove the screw [2], and detach the cassette pickup solenoid [3].
[1]
[1]
F-3-891
3.6.4.11 Removing the Cassette Feeder
1) Lift the machine, and detach the cassette feeder [1].
0007-7094
[2]
[3]
F-3-895
3.6.5 Cassette Separation Pad
3.6.5.1 Removing the Cassette
1) Hold the grip, and take out the cassette.
0007-6965
3.6.5.2 Removing the Front of the Cassette
1) Remove the 4 claws [1], and detach the front [2] of the cassette.
0007-6962
3-137
Chapter 3
[1]
[1]
[2]
[2]
[1]
F-3-900
4) Pick the release claw [1], and slide the manual feed pickup roller [2] to the
right to detach.
[2]
[1]
[2]
F-3-896
3.6.5.3 Removing the Cassette Separation Pad
0007-6967
1) Detach the paper level check lever [1] (RB-0866) found on the left of the
cassette.
[1]
[2]
F-3-897
2) While holding down the holding plate [1], remove the 2 claws [2], and
detach the separation pad [3].
[1]
[3]
[1]
F-3-901
3.6.7 Manual Pickup Solenoid
3.6.7.1 Removing the Rear Cover
0007-7107
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[2]
[1]
F-3-898
3.6.6 Manual Pickup Roller
3.6.6.1 Removing the Manual Pickup Roller
0007-8509
1) Open the front cover.
2) Remove the claw [1], and detach the pickup roller protective cover [2].
[3]
[3]
[1]
[2]
F-3-902
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
F-3-899
3) Pick the release claw [1], and slide the bush [2] in the direction of the
arrow.
3-138
Chapter 3
[4]
[5]
F-3-903
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
F-3-906
[3]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[3]
[1]
[2]
F-3-904
3.6.7.2 Removing the Reader Assembly
0007-8485
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[3]
[2]
F-3-907
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[1]
[1]
[2]
[2]
[2]
F-3-908
F-3-905
5) Remove the 6 screws [1], and lift the reader unit to detach.
When closing the reader assembly, be sure to push in the arm [1] first.
3-139
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-913
F-3-909
3.6.7.5 Removing the Power Supply Assembly
3.6.7.3 Removing the Right Cover
0007-7110
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-7112
[1]
[1]
[1]
F-3-910
[1]
[2]
F-3-914
[3]
3.6.7.6 Removing the Face-Down Cover
0007-7113
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-911
3.6.7.4 Removing the Left Cover
0007-7111
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-915
3.6.7.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[1]
F-3-912
3-140
0007-7114
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-916
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-918
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-919
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-917
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-920
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-141
Chapter 3
3.6.7.11 Removing the Registration Clutch
[1]
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
[4]
[2]
[2]
[3]
0007-7125
[1]
F-3-925
F-3-921
3.6.7.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6605
[1]
[2]
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3.6.7.12 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
[1]
0007-9072
[2]
[1]
F-3-922
F-3-926
2) Remove the 2 screws [1], and detach the front sub cover [2].
3.6.7.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6586
[1]
[2]
[2]
[2]
[1]
F-3-927
F-3-923
3.6.7.10 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-7118
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[2]
[2]
[1]
[1]
F-3-924
3-142
F-3-928
Chapter 3
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
3.6.8 Manual Separation Roller
3.6.8.1 Removing the Cassettes
[1]
0007-8510
1) Hold the grip, and take out the cassette.
3.6.8.2 Removing the Rear Cover
0007-8511
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[2]
[2]
[3]
[3]
[3]
[1]
[1]
[2]
F-3-932
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[2]
F-3-929
3.6.7.13 Removing the Manual Pickup Feed Solenoid
[4]
0007-7128
1) Disconnect the 2 connectors [1], and free the harness [2] from the harness
guide [3].
2) Free the cable [1] of the density detection board and the ITB home
position detection board from the harness guide [2]: then, free the cable
from the clamp of the pickup solenoid cover [3].
3) Remove the screw [4], and detach the pickup solenoid cover [5].
[1]
[3]
[5]
F-3-933
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[2]
[4]
[3]
[5]
[3]
F-3-930
4) Disconnect the connector [1], and remove the screw [2]; then, detach the
manual feed pickup solenoid [3].
[2]
[2]
F-3-934
3.6.8.3 Removing the Right Cover (with the reader
assembly intact)
1) Free the cable [1] of the reader assembly.
[3]
0007-8512
[1]
F-3-931
3-143
Chapter 3
[3]
[1]
[2]
[2]
F-3-938
3.6.8.4 Removing the Left Cover (with the reader
assembly intact)
0007-8513
1) Disconnect the plug [1], and free the cable [2] of the reader assembly from
the guide.
F-3-935
2) Open the reader assembly [1] and the top cover [2].
[1]
[2]
[2]
F-3-936
[2]
3) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-939
2) Open the reader assembly [1] and the top cover [2].
[1]
[2]
[1]
F-3-937
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
F-3-940
3) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the right cover [3].
MEMO
It is difficult to release three claws [2]. If you release the lowest one first,
the second lowest, and then the top, it becomes easy.
3-144
Chapter 3
[3]
[2]
[2]
[1]
[1]
[1]
[2]
F-3-944
F-3-941
2) Slide the front cover [1] to the left to detach.
[2]
[3]
[2]
[1]
F-3-945
3.6.8.7 Removing the Manual Feed Pickup Separation
Pad
F-3-942
3.6.8.5 Removing the Lower Front Cover
0007-8516
0007-8514
1) Free the claw [1] using a flat-blade screwdriver; then, slide the lower
cover [2] to the left to detach.
1) Remove the screw [1], and detach the manual feed pickup separation pad
[2].
[1]
[2]
F-3-946
[1]
3.6.9 Registration Detection PCB
[2]
3.6.9.1 Removing the Fixing Assembly
0008-1827
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
F-3-943
3.6.8.6 Removing the Front Cover
0007-8515
1) Push the 2 bosses [1] used to hold the manual feed tray toward the inside
while pushing the guide assembly [2] toward the outside to free the
bosses.
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
3-145
Chapter 3
[4]
[5]
F-3-950
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[2]
[1]
F-3-947
[1]
3.6.9.2 Removing the Fixing Assembly
0011-7865
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[3]
[3]
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[2]
F-3-951
3.6.9.4 Removing the Reader Assembly
0007-8566
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[1]
[1]
[1]
[3]
[2]
[1]
F-3-948
[2]
3.6.9.3 Removing the Rear Cover
[2]
0007-8548
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
[3]
[2]
F-3-949
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3-146
F-3-952
When closing the reader assembly, be sure to push in the arm [1] first.
Chapter 3
[1]
[1]
[1]
F-3-956
[1]
3.6.9.5 Removing the Right Cover
0007-8585
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
F-3-953
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[1]
[1]
F-3-957
[3]
[2]
[2]
F-3-954
[3]
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[2]
[2]
F-3-958
F-3-955
5) Remove the 6 screws [1], and lift the reader unit to detach.
3.6.9.6 Removing the Left Cover
0007-8609
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
[1]
F-3-959
3-147
Chapter 3
[3]
[4]
[3]
[2]
[2]
[1]
[2]
F-3-963
F-3-960
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
3.6.9.7 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8635
[1]
[1]
[2]
[1]
[1]
[4]
[1]
F-3-961
3.6.9.8 Removing the Face-Down Cover
0007-8788
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
F-3-964
[1]
[2]
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-962
3.6.9.9 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
3-148
[3]
0008-2393
Chapter 3
[1]
[1]
[2]
[2]
F-3-968
3.6.9.10 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6606
F-3-965
[1]
[2]
Enlarged View of the Paper Retainer
OK
NG
[3]
[3]
F-3-966
[1]
F-3-969
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
3.6.9.11 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
F-3-967
0007-8807
[2]
[1]
F-3-970
3.6.9.12 Removing the Cassette Feeder
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
1) Lift the machine, and detach the cassette feeder [1].
0007-8815
3-149
Chapter 3
[1]
F-3-975
3) With care, shift down the machine to the left; then, remove the 8 screws
[2] from the bottom, and detach the lower case assembly [3].
[1]
[3]
[2]
F-3-971
3.6.9.13 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
0011-6622
[2]
[3]
[2]
[1]
[2]
[2]
[2]
F-3-976
F-3-972
3.6.9.14 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
[1]
[1]
0007-8817
When you shift down the machine, be sure to take care to avoid injury by the
edge of the side plate. Also, be sure to hold it by its grip segment.
Be sure to place a cushioning material (g., towel) on the work table to protect
the protrusions of the machine from damage.
Moreover, be sure to tape the opening of the laser scanner assembly to prevent intrusion of toner in the optical path of the assembly before shifting
down the machine.
[3]
If you must detach the lower case assembly, base user to hold it by its bottom
so as to avoid injury by the edge of its side plate.
3.6.9.16 Removing the Registration Detection PCB
1) Disconnect the connector [1] found on the DC controller board.
[1]
[1]
[2]
[1]
F-3-973
3.6.9.15 Removing the Lower Case Assembly
1) Remove the screw [1], and disconnect the 5 connectors [2].
0007-8818
[2]
F-3-977
2) Remove the screw [1], and detach the registration detection PCB.
[1]
F-3-974
2) Remove the screw [1] from the left side of the machine.
3-150
0007-8819
Chapter 3
[2]
[1]
[1]
F-3-978
[1]
3.6.10 Main Motor
[2]
3.6.10.1 Removing the Rear Cover
[2]
0007-7974
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[1]
[3]
F-3-982
When closing the reader assembly, be sure to push in the arm [1] first.
[3]
[2]
F-3-979
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-983
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
F-3-980
[1]
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-984
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
F-3-981
3.6.10.2 Removing the Reader Assembly
0007-8487
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
3-151
Chapter 3
[2]
[1]
[2]
F-3-985
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
F-3-989
[1]
[3]
[2]
[1]
[2]
[1]
F-3-986
F-3-990
3.6.10.3 Removing the Right Cover
0007-8004
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
3.6.10.5 Removing the Power Supply Assembly
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8007
[1]
[1]
[1]
F-3-987
[2]
[1]
[3]
F-3-991
3.6.10.6 Removing the Face-Down Cover
0007-8009
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[2]
[1]
[2]
F-3-988
3.6.10.4 Removing the Left Cover
0007-8005
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
3-152
F-3-992
Chapter 3
3.6.10.7 Removing the Top Cover
0007-8010
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
[3]
[1]
[4]
[2]
[1]
[2]
F-3-993
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-995
Enlarged View of the Paper Retainer
[2]
OK
NG
[1]
[1]
[4]
[3]
[3]
F-3-996
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-994
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-997
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-153
Chapter 3
3.6.10.11 Removing the Registration Clutch
[1]
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
[4]
[2]
[2]
[3]
0007-8045
[1]
F-3-1002
F-3-998
3.6.10.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6607
[1]
[2]
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3.6.10.12 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
[1]
0007-8947
[2]
[1]
F-3-999
F-3-1003
2) Remove the 2 screws [1], and detach the front sub cover [2].
3.6.10.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6623
[1]
[2]
[2]
[2]
[1]
F-3-1004
F-3-1000
3.6.10.10 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
0007-8043
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[2]
[2]
[1]
[1]
F-3-1001
3-154
F-3-1005
Chapter 3
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
[1]
[2]
[2]
[3]
[1]
[1]
[1]
[3]
[2]
[1]
F-3-1008
3.7.2 Fixing Film Unit
3.7.2.1 Removing the Fixing Assembly
0011-7849
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[2]
F-3-1006
3.6.10.13 Removing the Main Motor
1) Remove the 4 screws [1], and detach the main motor [2].
0007-8050
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[1]
[2]
[1]
F-3-1007
3.7 FIXING SYSTEM
3.7.1 Fixing Unit
3.7.1.1 Removing the Fixing Assembly
0011-7528
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[1]
[3]
[2]
[1]
F-3-1009
3.7.2.2 Removing the Face-Up Cover
0011-7850
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
1) Turn the fixing lever [1] of the fixing assembly 90 deg in the direction of
the arrow.
2) Remove the 4 claws [2], and detach the face-up cover [3] from the fixing
assembly.
3-155
Chapter 3
[2]
[2]
[1]
[1]
[3]
[1]
F-3-1010
3.7.2.3 Removing the Fixing Film Unit
1) Unhook the 1 claw [1] and remove the pressure roller gear[2].
2) Unhook the 1 claw [3] and remove the delivery roller gear[4].
3) Remove the idle gear[5].
0011-7554
[4]
[1]
[1]
[2]
[3]
F-3-1013
[5]
Make sure that the 2 springs are fitted onto the bosses on the fixing upper
cover when reassembling the cover. See the figure for the correct positions
of the boss and springs (shown on the left).
[1]
[4]
[3]
F-3-1011
4) Pressing the boss [1] inward, rotate the delivery idle gear shaft holder [2]
in the direction of the arrow and remove the holder together with the
delivery idle gear shaft [3].
[1]
[2]
[2]
[3]
F-3-1014
6) Remove the upper separation guide [1].
7) Remove the 2 releasing levers [2].
8) Slide the pressure plate [4] in upward direction, and remove the 2 bosses
[3].
9) Remove the pressure plate [4] from the fixing assembly.
[2]
F-3-1012
5) Remove the 4 screws [1]; then, remove the 2 claws [2] and the boss [3] to
detach the fixing upper cover [4].
[4]
[1]
[2]
[3]
[4]
[3]
F-3-1015
10) Disconnect the connector [1], and free the cable [2] from the clamp [3].
11) Remove the screw [4].
3-156
Chapter 3
[1]
[4]
[3]
[2]
[1]
F-3-1020
F-3-1016
12) Remove the cable [1] from the guide [2].
13) Remove the 2 claws [4], and disconnect the connector [3].
14) Free the cable from the edge saddle [5].
3.7.3 Fixing Pressure Roller
3.7.3.1 Removing the Fixing Assembly
0011-7853
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
[2]
[1]
[2]
[5]
Whenever you have to replace the fixing assembly, be sure to disconnect the
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[3]
[4]
[3]
F-3-1017
15) Remove the 1 screw [1] and slide the fixing separation guide [2] out to
the left.
[2]
[1]
F-3-1018
[1]
[3]
[2]
[1]
F-3-1021
Make sure that all cables on the fixing film unit are hooked into the fixing
separation guide when reassembling the guide. Especially the right-side cables are easy to be pinched unless properly
hooked into the guide.
[1]
3.7.3.2 Removing the Face-Up Cover
0011-7854
1) Turn the fixing lever [1] of the fixing assembly 90 deg in the direction of
the arrow.
2) Remove the 4 claws [2], and detach the face-up cover [3] from the fixing
assembly.
[2]
[2]
F-3-1019
16) Lift the fixing film unit [1] up straight in horizontal position to take it out
of the fixing unit.
[1]
[3]
[1]
F-3-1022
3.7.3.3 Removing the Fixing Film Unit
1) Unhook the 1 claw [1] and remove the pressure roller gear[2].
2) Unhook the 1 claw [3] and remove the delivery roller gear[4].
3) Remove the idle gear[5].
0011-7855
3-157
Chapter 3
[1]
[1]
[2]
[5]
[2]
F-3-1026
[4]
[3]
F-3-1023
4) Pressing the boss [1] inward, rotate the delivery idle gear shaft holder [2]
in the direction of the arrow and remove the holder together with the
delivery idle gear shaft [3].
6) Remove the upper separation guide [1].
7) Remove the 2 releasing levers [2].
8) Slide the pressure plate [4] in upward direction, and remove the 2 bosses
[3].
9) Remove the pressure plate [4] from the fixing assembly.
[2]
[1]
[4]
[2]
[1]
[3]
[2]
[3]
F-3-1024
5) Remove the 4 screws [1]; then, remove the 2 claws [2] and the boss [3] to
detach the fixing upper cover [4].
[4]
[2]
[3]
F-3-1027
10) Disconnect the connector [1], and free the cable [2] from the clamp [3].
11) Remove the screw [4].
[1]
[1]
[4]
[3]
[2]
F-3-1028
12) Remove the cable [1] from the guide [2].
13) Remove the 2 claws [4], and disconnect the connector [3].
14) Free the cable from the edge saddle [5].
[4]
[1]
[2]
[3]
[1]
F-3-1025
[2]
Make sure that the 2 springs are fitted onto the bosses on the fixing upper
cover when reassembling the cover. See the figure for the correct positions
of the boss and springs (shown on the left).
[5]
[3]
[3]
[4]
F-3-1029
15) Remove the 1 screw [1] and slide the fixing separation guide [2] out to
the left.
3-158
Chapter 3
power cord first. Also, be sure to wait unit the fixing assembly has cooled
before removing it after disconnecting the power cord.
[2]
[1]
F-3-1030
Make sure that all cables on the fixing film unit are hooked into the fixing
separation guide when reassembling the guide. Especially the right-side cables are easy to be pinched unless properly
hooked into the guide.
[1]
[1]
[3]
[2]
[1]
F-3-1034
3.7.4.2 Removing the Face-Up Cover
0011-7857
1) Turn the fixing lever [1] of the fixing assembly 90 deg in the direction of
the arrow.
2) Remove the 4 claws [2], and detach the face-up cover [3] from the fixing
assembly.
[2]
[2]
F-3-1031
16) Lift the fixing film unit [1] up straight in horizontal position to take it out
of the fixing unit.
[1]
[3]
[1]
F-3-1035
3.7.5 Pre-Fixing Paper Detection Sensor
[1]
3.7.5.1 Removing the Rear Cover
F-3-1032
0007-8885
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
3.7.3.4 Removing the Fixing Pressure Roller
1) Remove the pressure roller[1] from the fixing unit.
0011-7564
[1]
[3]
[3]
[1]
[2]
F-3-1033
F-3-1036
3.7.4 Fixing Delivery Paper Sensor
3) Open the reader assembly [4], and lift to free the 2 claws [5].
3.7.4.1 Removing the Fixing Assembly
0011-7856
1) Turn the lever [1] of the fixing assembly 90 deg in the direction of the
arrow.
2) While holding the grip [2], slide out the fixing assembly [3] toward the
front and out of the machine.
Whenever you have to replace the fixing assembly, be sure to disconnect the
3-159
Chapter 3
[4]
[5]
F-3-1037
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[1]
F-3-1040
[3]
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[3]
[1]
[2]
F-3-1038
3.7.5.2 Removing the Reader Assembly
0007-8886
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[3]
[2]
F-3-1041
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[1]
[1]
[1]
[2]
[2]
[2]
F-3-1042
F-3-1039
When closing the reader assembly, be sure to push in the arm [1] first.
3-160
5) Remove the 6 screws [1], and lift the reader unit to detach.
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-1047
F-3-1043
3.7.5.5 Removing the Power Supply Assembly
3.7.5.3 Removing the Right Cover
0007-8887
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8889
[1]
[1]
[1]
F-3-1044
[1]
[2]
F-3-1048
[3]
3.7.5.6 Removing the Face-Down Cover
0007-8890
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-1045
3.7.5.4 Removing the Left Cover
0007-8888
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-1049
3.7.5.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8891
[1]
F-3-1046
3-161
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-1050
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-1052
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-1053
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-1051
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-1054
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-162
Chapter 3
[1]
[1]
F-3-1058
[2]
3.7.5.11 Removing the Shield Plate
F-3-1055
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
3.7.5.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6608
[3]
0011-6624
[1]
[1]
[2]
[2]
[2]
F-3-1059
3.7.5.12 Removing the Inside Cover
1) Remove the 2 claws [1], and detach the inside cover [2].
[1]
0007-8898
[2]
F-3-1056
3.7.5.9 Removing the Left Frame
1) Remove the 4 screws [1], and detach the left frame [2].
[1]
0007-8893
[2]
[1]
F-3-1060
3.7.5.13 Removing the Registration Clutch
1) Disconnect the connector [1], and open the harness band [2].
2) Remove the E-ring [3], and detach the registration clutch [4].
0007-8899
[1]
F-3-1057
3.7.5.10 Removing the Cassette Feeder
1) Lift the machine, and detach the cassette feeder [1].
0007-8894
[4]
[2]
[3]
[1]
F-3-1061
The connector on the registration clutch side is designed to prevent disconnection. If you have to detach the registration clutch, be sure to disconnect
the connector (J113) on the DC controller PCB side.
3-163
Chapter 3
[1]
3.7.5.14 Removing the Main Drive Assembly
1) Shift down the drive release lever [1], and remove the gear [2].
[1]
0007-8900
[2]
[2]
[2]
[3]
F-3-1062
[1]
2) Remove the 2 screws [1], and detach the front sub cover [2].
[1]
[2]
F-3-1065
3.7.5.15 Removing the Toner Tray
[2]
1) Remove the 2 claws [1], and detach the toner tray [2].
[1]
F-3-1063
0007-8901
[2]
When mounting the main drive assembly, be sure to fit the gear [2] as shown
with the drive release lever [1] in down position (i.e., with drive engaged).
At this time, be sure that the position of the gear is correct so that it is fully
engaged with the gear of the drive release lever.
[2]
[1]
[1]
[1]
F-3-1064
3) Disconnect the 3 connectors [1], and remove the 8 screws [2]; then, detach
the main drive assembly [3].
F-3-1066
3.7.5.16 Removing the Fixing Front Paper Sensor Spacer
1) Remove the fixing front paper sensor spacer [1].
0007-8902
[1]
F-3-1067
3.7.5.17 Removing the Fan Duct
1) Disconnect the 4 connectors [1], and remove the 2 claws [2].
2) Slide the fan duct [3] in upward direction to detach.
3-164
0007-8903
Chapter 3
down the machine.
[1]
[1]
[3]
If you must detach the lower case assembly, base user to hold it by its bottom
so as to avoid injury by the edge of its side plate.
3.7.5.19 Removing the Fixing Front Paper Sensor
0007-8906
1) Bend over the plastic sheet [1].
2) Remove the screw [2], and detach the fixing front paper sensor assembly
[3].
[1]
[2]
[1]
F-3-1068
3.7.5.18 Removing the Lower Case Assembly
1) Remove the screw [1], and disconnect the 5 connectors [2].
[1]
0007-8904
[2]
[1]
[3]
F-3-1069
2) Remove the screw [1] from the left side of the machine.
[2]
F-3-1072
3) Remove the 2 claws [1], and detach the fixing front paper sensor [2]; then,
disconnect heat connector [3].
[3]
[1]
[2]
F-3-1070
3) With care, shift down the machine to the left; then, remove the 8 screws
[2] from the bottom, and detach the lower case assembly [3].
[3]
[1]
[2]
F-3-1073
3.7.6 Fixing Motor
[2]
[2]
3.7.6.1 Removing the Rear Cover
0007-8554
1) Disconnect the cable [1] of the power supply assembly.
2) Open the face-up cover [2], and remove the 4 screws [3] of the rear cover.
[2]
F-3-1071
When you shift down the machine, be sure to take care to avoid injury by the
edge of the side plate. Also, be sure to hold it by its grip segment.
Be sure to place a cushioning material (g., towel) on the work table to protect
the protrusions of the machine from damage.
Moreover, be sure to tape the opening of the laser scanner assembly to prevent intrusion of toner in the optical path of the assembly before shifting
3-165
Chapter 3
When closing the reader assembly, be sure to push in the arm [1] first.
[1]
[3]
[3]
[2]
F-3-1074
3) Open the reader assembly [4], and lift to free the 2 claws [5].
[4]
[1]
F-3-1078
2) Open the left and right claws in the direction of the arrows, and detach the
hinge cover [1].
3) Free the 2 harness bands [1], and disconnect the 2 cables [2] connected to
the reader assembly.
[5]
[1]
F-3-1075
4) Close the reader assembly; then, detach the rear cover[1].
[1]
[3]
[3]
[2]
[3]
F-3-1079
4) Open the harness band [1], and disconnect the 2 cables connected to the
reader assembly.
[2]
[2]
[1]
F-3-1076
3.7.6.2 Removing the Reader Assembly
0007-8572
1) Open the reader assembly, and remove the left and right E-rings [1]; then,
pull out the pin [2].
[2]
F-3-1080
5) Remove the 6 screws [1], and lift the reader unit to detach.
[1]
[1]
[2]
[2]
F-3-1077
3-166
Chapter 3
[1]
[3]
[2]
[1]
[2]
[1]
F-3-1085
F-3-1081
3.7.6.5 Removing the Power Supply Assembly
3.7.6.3 Removing the Right Cover
0007-8592
1) Remove the 2 screws [1] of the side; then, remove the 3 claws [2] to detach
the left cover [3].
1) Remove the 6 screws [1], and detach the power supply assembly [2].
[1]
[2]
0007-8651
[1]
[1]
[1]
F-3-1082
[1]
[2]
F-3-1086
[3]
3.7.6.6 Removing the Face-Down Cover
0007-8673
1) Remove the 2 screws [1], and slide the face-down cover [2] in downward
direction to detach.
[1]
[2]
[2]
F-3-1083
3.7.6.4 Removing the Left Cover
0007-8615
1) Remove the 2 screws [1] from the side; then, remove the 3 claws [2] to
detach the right cover [3].
F-3-1087
3.7.6.7 Removing the Top Cover
1) Remove the claw [1], and detach the ring gear [2].
2) Free the link lever [3] from the shaft [4].
0007-8690
[1]
F-3-1084
3-167
Chapter 3
[3]
[4]
[1]
[2]
[1]
[2]
F-3-1088
3) Remove the 3 binding screws [1] and 2 TP screws [2]; then, disconnect
the connector [3], and detach the top cover [4].
F-3-1090
[2]
[1]
Enlarged View of the Paper Retainer
[1]
OK
NG
[4]
[3]
[3]
F-3-1091
When attaching the top cover, be sure to fit the link lever [2] while keeping
the drive release lever [1] in up position (i.e., with drive disengaged).
[2]
[1]
[3]
F-3-1089
When attaching the top cover, be sure to match its 2 positioners [1] and the
2 cut-offs [2] of the face-down sub cover, while making sure that the paper
retainer [3] is not blocking the feed path.
F-3-1092
If you are fitting the drum cartridge in the machine with the top cover removed, be sure to do so with the drive release lever [1] fully in up position
(i.e., with drive disengaged).
If the drive release lever is in low position (i.e., with drive engaged), it forces
out the coupling [2], causing the coupling to interface with the drum cartridge and to suffer damage.
3-168
Chapter 3
[2]
[1]
[3]
[1]
[2]
F-3-1096
[2]
F-3-1093
3.7.6.8 Removing the Right Frame
1) Remove the 5 screws [1], and detach the right frame [2].
0011-6609
[1]
[2]
[1]
F-3-1094
3.7.6.9 Removing the Shield Plate
1) Free the flat cable [1] from the connector.
2) Remove the 6 screws [2], and detach the shielding plate [3].
[3]
0011-6625
[1]
[2]
[2]
F-3-1095
3.7.6.10 Removing the Fixing Motor
1) Unplug the 1 connector [1] and remove the 4 screws [2].
2) Remove the fixing motor [3] from main unit.
0011-7566
3-169
Chapter 4 MAINTENANCE AND INSPECTION
Contents
Contents
4.1 User Maintenance ..........................................................................................................................................................4-1
4.1.1 Cleaning the Scanning Area......................................................................................................................................................... 4-1
4.1.2 Cleaning the ADF Area ............................................................................................................................................................... 4-1
4.1.3 Toner Cartridge ............................................................................................................................................................................ 4-1
4.1.4 Drum Cartridge ............................................................................................................................................................................ 4-1
4.1.5 Mylar Sheet .................................................................................................................................................................................. 4-1
4.1.6 Pressure Roller (fixing assembly) ................................................................................................................................................ 4-1
4.1.7 Density Sensor/ITB Home Position Sensor ................................................................................................................................. 4-2
4.2 Periodically Replaced Parts ...........................................................................................................................................4-2
4.2.1 Periodic Replacement Parts ......................................................................................................................................................... 4-2
4.3 Consumables ..................................................................................................................................................................4-2
4.3.1 Expected Service Life of Consumable Parts................................................................................................................................ 4-2
4.4 Periodical Service ..........................................................................................................................................................4-3
4.4.1 Periodic Service ........................................................................................................................................................................... 4-3
Chapter 4
4.1 User Maintenance
4.1.1 Cleaning the Scanning Area
0008-3059
Wipe the scanning area (shaded area) with a clean, soft, lint-free cloth moistened
with water, then wipe with a clean, soft, dry, lint-free cloth.
Platen glass cover
Platen glass
F-4-1
4.1.2 Cleaning the ADF Area
0008-3062
Black lines may appear in copies when the ADF is used to feed documents.
This is caused by paste, ink, correction fluid, or other foreign matters in the read
area of the platen glass (shaded area). Use a clean soft cloth to wipe the read area
clean. Take particular care to clean at the locations where the black lines are
appearing on copies.
If you have trouble getting the glass clean, wipe with a cloth moistened with water
or a mild neutral detergent, and then wipe the glass dry with another cloth.
Paste, ink,
correction fluid,
etc.
Read area
White roller
A
Black lines
B
C
Copy
F-4-2
4.1.3 Toner Cartridge
0008-1734
Replace it as necessary.
4.1.4 Drum Cartridge
0008-1735
Replace it as necessary.
4.1.5 Mylar Sheet
0008-1736
If necessary, clean the mylar sheet with a firmly squeezed wet soft cloth.
F-4-3
4.1.6 Pressure Roller (fixing assembly)
0008-1737
The following is a procedure for cleaning the pressure roller.
1) Open the multifeeder tray.
2) Open the face-up delivery tray.
3) Place a sheet of A4 or LTR paper in the multifeeder tray.
4) Press [menu] on he control panel, and make the following selections: 10. maintenance>3. roller cleaning>2. cleaning paper print. Then, press [OK] to print out
a cleaning paper.
5) Place the cleaning page from step 4) in the multifeeder with the printed side facing downward and in the direction of the arrow.
4-1
Chapter 4
6) Press [menu] on the control panel, and make the following selections: 10. maintenance>3. roller cleaning>2. start cleaning. Then, press [OK] to start cleaning.
F-4-4
- Take care. Once the machine starts cleaning, you will not be able to stop it in the middle.
- It take about 3 min to clean the fixing assembly (i.e., from when you have placed the cleaning paper in the manual feed tray to when the paper is delivered). Do
not turn off the power or open the cover during this period of time.
4.1.7 Density Sensor/ITB Home Position Sensor
0008-1738
When replacing the drum cartridge or contamination is found in the printer, clean the detection windows of the density detection sensor, as well as of the ITB home
position detection sensor.
[1]
[2]
F-4-5
T-4-1
[1]
Density sensor
[2]
ITB home position sensor
The printer may indicate an image defect when density detection sensor or the ITB home position detection sensor is not clean. In these cases, clean the detection
windows according to the procedures shown above.
4.2 Periodically Replaced Parts
4.2.1 Periodic Replacement Parts
0003-0867
- No parts require periodic replacement in this printer.
4.3 Consumables
4.3.1 Expected Service Life of Consumable Parts
0011-6423
- Some parts of the machine are likely to require replacement once or more because of wear or damage. Replace them when they are found to be faulty by referring
to the following table:
Timing of Replacing the Fixing Assembly
When the fixing assembly starts to approach the end of its life, you are likely to see ghost images in non-image areas of printouts or may notice general lowering
of print quality (e.g., because of poor fixing). Paper may also start to wrinkle. You may need to replace the fixing assembly when these symptoms start to occur.
T-4-2
4-2
No.
Parts name
Parts No.
Q'ty
Estimated life
1
Fixing assembly(230V)
RG5-7442-000
1
50,000 prints
Chapter 4
4.4 Periodical Service
4.4.1 Periodic Service
The printer has no parts that require periodic servicing.
0003-0865
4-3
Chapter 5 TROUBLESHOOTING
Contents
Contents
5.1 Measurement and Adjustment .......................................................................................................................................5-1
5.1.1 Initial Checkup............................................................................................................................................................................. 5-1
5.1.1.1 Initial Check ....................................................................................................................................................................................................5-1
5.1.2 Test Printing................................................................................................................................................................................. 5-1
5.1.2.1 Test Print .........................................................................................................................................................................................................5-1
5.1.3 Electrical Adjustment................................................................................................................................................................... 5-1
5.1.3.1 Work After Replacing the Laser/Scanner Unit ..............................................................................................................................................5-1
5.1.3.2 When Replacing the SCNT Board ..................................................................................................................................................................5-2
5.1.4 Fixing System .............................................................................................................................................................................. 5-2
5.1.4.1 Checking the Nip Width of the Lower Fixing Roller .....................................................................................................................................5-2
5.2 Service Tools..................................................................................................................................................................5-2
5.2.1 Standard Tools ............................................................................................................................................................................. 5-2
5.2.2 Special Tools................................................................................................................................................................................ 5-3
5.2.3 Solvent/Oil List ............................................................................................................................................................................ 5-3
5.3 Location of Convectors ..................................................................................................................................................5-3
5.3.1 Location of Convectors................................................................................................................................................................ 5-3
5.4 Error Code......................................................................................................................................................................5-5
5.4.1 Outline.......................................................................................................................................................................................... 5-5
5.4.1.1 Error Code Outline ..........................................................................................................................................................................................5-5
5.4.1.2 Service Error Code ..........................................................................................................................................................................................5-5
5.5 Service Mode .................................................................................................................................................................5-6
5.5.1 Outline.......................................................................................................................................................................................... 5-6
5.5.1.1 Hardware Switches..........................................................................................................................................................................................5-6
5.5.1.2 Service Data Setting ........................................................................................................................................................................................5-6
5.5.1.3 Service Data Entry Method .............................................................................................................................................................................5-7
5.5.2 Service Soft Switch Settings (SSSW).......................................................................................................................................... 5-7
5.5.2.1 Outline.............................................................................................................................................................................................................5-7
5.5.2.1.1 Explanation of # SSSW...........................................................................................................................................................................5-7
5.5.2.2 SSSW-SW14 ...................................................................................................................................................................................................5-7
5.5.2.2.1 Details of Bit 0 and Bit 1.........................................................................................................................................................................5-7
5.5.2.3 SSSW-SW18 ...................................................................................................................................................................................................5-8
5.5.2.3.1 List of Functions .....................................................................................................................................................................................5-8
5.5.2.3.2 Details of Bit 0 ........................................................................................................................................................................................5-8
5.5.2.3.3 Details of Bit 1 ........................................................................................................................................................................................5-8
5.5.3 Data Initialization Mode (CLEAR) ............................................................................................................................................. 5-8
5.5.3.1 # CLEAR.........................................................................................................................................................................................................5-8
5.5.4 Test Mode (TEST) ....................................................................................................................................................................... 5-8
5.5.4.1 Overview .........................................................................................................................................................................................................5-8
5.5.4.1.1 Test Mode Overview...............................................................................................................................................................................5-8
5.5.4.2 DRAM Test.....................................................................................................................................................................................................5-8
5.5.4.2.1 D-RAM Test............................................................................................................................................................................................5-8
5.5.4.3 Print Test .........................................................................................................................................................................................................5-9
5.5.4.3.1 PRINT Test .............................................................................................................................................................................................5-9
5.5.4.4 Modem Test ....................................................................................................................................................................................................5-9
5.5.4.4.1 Modem Tests ...........................................................................................................................................................................................5-9
5.5.4.4.2 Frequency Test ......................................................................................................................................................................................5-10
5.5.4.4.3 G3 Signal Transmission Test ................................................................................................................................................................5-10
5.5.4.4.4 V.34 G3 Signal Transmission Test .......................................................................................................................................................5-10
5.5.4.5 Faculty Test...................................................................................................................................................................................................5-11
5.5.4.5.1 FACULTY Tests ...................................................................................................................................................................................5-11
5.5.4.5.2 Sensor Tests ..........................................................................................................................................................................................5-11
5.5.4.5.3 Operation Panel Tests............................................................................................................................................................................5-12
Chapter 5
5.1 Measurement and Adjustment
5.1.1 Initial Checkup
Feeding Direction
5.1.1.1 Initial Check
0008-1741
Check the following items before you diagnose malfunction. If any failure is
found, a service engineer is to clear the problem and to give the instruction
to a user.
1) Installation environment
a. The power voltage is -/+10 % of the rated voltage.
b. The printer is securely installed on a level surface.
c. The room temperature is kept between 10 and 30 deg C, and the relative
humidity, between 10 and 80 %.
d. Avoid sites generating ammonia gas, high temperature or high humidity
(near water faucet, kettle, or humidifier), cold places, open flames, dusty
area and sites the wind blows in from the air-conditioning duct.
e. Avoid sites exposed to direct sunlight. If unavoidable, advise the customer
to hang curtains.
f. A well-ventilated place.
g. Make sure that the power cord is inserted to the machine and the outlet
securely.
2) Paper checks
a. The recommended paper for the printer is used.
b. Paper is not damp.
c. Paper is not dirty.
3) Paper sets
a. The amount of paper in the pick-up source is within specifications.
b. Paper is correctly set on the selected pick-up source.
c. The size guides are aligned with paper.
4) Cartridge sets
a. Make sure the EP-87 toner cartridges in each color are set in the printer
properly.
b. Make sure the EP-87 drum cartridge is set in the printer properly.
5) Fixing unit sets
a. Make sure the fixing unit is set in the printer properly.
6) External cover sets
a. Make sure the top cover and memory cover are closed securely.
7) Condensation
During winter, if the printer is brought from a cold place such as a warehouse
into a warm room, condensation will appear inside the printer, causing various problems.
Ex.)
a. Condensation in the optical system (four-sided mirror, reflective mirror,
lens, etc.) will result in a light print image.
b. As the photosensitive drum is cold, the resistance of the photoconductive
layer is high; this will lead to incorrect contrast.
If condensation appears, either wipe the parts with dry cloth, or leave the
printer on for 10 to 20 minutes.
If the toner cartridges are opened soon after being moved from a cold
room to a warm room, condensation may appear inside the cartridge and
may cause various problems.
Be sure to instruct the user that it is necessary to leave the printer for one
to two hours at a room temperature to allow it to acclimatize to the
temperature.
Black
Yellow
Magenta Cyan
F-5-1
To Print out Engine Test Prints
- When the machine is in a standby state, press [COLOR START KEY] on
the control panel to generate a color print.
- Open the machine's manual feed tray, and press the test print switch [1]
found on the front left to generate a single test pattern.
5.1.2 Test Printing
5.1.2.1 Test Print
0008-1742
The machine permits printing of engine test prints. Try printing out test
prints so that you may use them for identifying the location of a printer error.
In test printing, the machine prints out the following text pattern in 4 colors
(magenta, cyan, yellow, black):
[1]
F-5-2
5.1.3 Electrical Adjustment
5.1.3.1 Work After Replacing the Laser/Scanner Unit
0008-1740
The flash ROM mounted on the SCNT board retains PWM adjustment settings that are specific to individual laser/scanner units, requiring you to update the settings whenever you have replaced a laser/scanner unit.
Be sure to execute PWM adjustment in service mode, thereby updating the
PWM settings retained in the flash ROM on the SCNT board.
Executing PWM Adjustment
1) Press [MENU] and then [#] to enter service mode.
2) Go to [#TEXT MODE], and press [OK] and [*] in sequence to start [ADJUST TEST].
3) Press [1] to start PWM adjustment.
4) When done, see that the indication has changed to "OK".
5-1
Chapter 5
After PWM adjustment, the machine should start initialization sequence.
5.1.3.2 When Replacing the SCNT Board
0008-4973
The flash ROM mounted on the SCNT board retains PWM adjustment settings that are specific to individual laser/scanner units, requiring you to update the settings
whenever you have replaced a laser/scanner unit.
If you have replaced the SCNT board, be sure to go through the following steps:
1.Initializing the ROM
1) Press [MENU]; then, press [#] to start service mode.
2) Move to [#CLEAR], and press [OK].
3) Move to [ALL], and press [OK] to initialize the ROM.
2. PWM Adjustment
1) Press [MENU], an then press [#] to start service mode.
2) Go to [#TEST MODE]; then, press [OK] and [*] to start [ADJUST TEST].
3) Press [1], and see that [OK] is indicated.
At the end of PWM adjustment, the machine starts its initialization sequence.
5.1.4 Fixing System
5.1.4.1 Checking the Nip Width of the Lower Fixing Roller
0008-1739
The fixing unit is not designed to allow the adjustment of the pressure (nip width); however, incorrect nip width can cause fixing defects.
Check the nip width by following the procedures below. If the nip width does not satisfy specifications, replace the fixing unit.
1) Make an all-black print of A4 size using the cartridge of this printer by operating external devices, and take the print to the customer's site.
2) Place the all-black print facing down on the Cassette.
3) Select face-up delivery.
4) Press the test print switch.
5) Open the delivery door immediately after the leading edge of the print has come out to the face-up tray. Take out the print from the printer after 10 seconds from
turning off the power switch.
6) Measure the width of the glossy band across the paper and check that it meets the following requirements shown in figure.
- Center (a): 6 to 7.5 mm
- Difference between right/left and center (b - a, c - a): 0.6 mm or less
- Difference between right and left (|b - a|): 0.5 mm or less
10mm
c
Paper Feed
Direction
a
Center of Paper
b
10mm
About
30
mm
F-5-3
5.2 Service Tools
5.2.1 Standard Tools
0008-1750
The table below lists the standard tools required for servicing the printer.
T-5-1
No.
Tool name
Tool No.
Remark
1
2
3
4
Tool case
Jumper wire
Clearance gauge
Compression spring scale
TKN-0001
TKN-0069
CK-0057
CK-0058
With a clip
0.02 to 0.3 mm
0 to 600 g for checking the cassette spring pressure
5
Phillips screwdriver
CK-0101
6
7
8
9
10
Phillips screwdriver
Phillips screwdriver
Phillips screwdriver
Flat-blade screwdriver
Precision flat-blade screwdriver set
CK-0104
CK-0105
CK-0106
CK-0111
CK-0114
M3, M4 Length: 155 mm
M4, M5 Length: 191 mm
M4, M5 Length: 85 mm
11
12
13
14
15
Allen wrench set
File, fine
Allen (hex) screwdriver
Diagonal cutting pliers
Needle-nose pliers
CK-0151
CK-0161
CK-0170
CK-0201
CK-0202
5-piece set
16
17
18
19
20
Pliers
Retaining ring pliers
Crimper
Tweezers
Ruler
CK-0203
CK-0205
CK-0218
CK-0302
CK-0303
Applied to the axis ring
M4, M5 Length : 363 mm
5-2
6-piece set
M4
Length: 107 mm
Employed to measure 150 mm
Chapter 5
No.
Tool name
Tool No.
Remark
21
22
23
24
25
Soldering iron
Mallet, plastic head
Brush
Penlight
Plastic bottle
CK-0309
CK-0314
CK-0315
CK-0327
CK-0327
100V, 30 W
26
27
28
29
30
Solder
Desoldering wick
Lint-free paper
Oiler
Plastic jar
CK-0329
CK-0330
CK-0336
CK-0349
CK-0351
1.5 (mm dia) × 1 (mm)
1.5 mm
500SH/PKG
30cc
30cc
31
Digital multi-measure
FY9-2032
100cc
5.2.2 Special Tools
0008-1751
No special tools are required for this printer besides the standard tools.
5.2.3 Solvent/Oil List
0008-1752
T-5-2
No.
Name
Use
1
Alcohol
Cleaning: plastic(note), rubber, metal, - Flammable: keep away from flame
oil, and toner stains
- Purchase locally
Remarks
2
Lubricating oil
Apply between gear and shaft
3
Lubricant
Apply to gears (developing rotary unit) - Tool No. FY9-6015
(20g tube)
4
Lubricant
Apply to gears
- Tool No. CK-8003
(100 ml bottle)
- Tool No. HY9-0007
(20g tube)
When cleaning the external covers,use a firmly squeezed wet cloth.
5.3 Location of Convectors
5.3.1 Location of Convectors
0008-1753
J103
J102
J126
J128
J31
J109
J123
J121
J220
J701
J11
J221
J704
J21
J230
J107
J118 J138 J130
J213
J71
J110
J81
J718
J720
F-5-4
5-3
Chapter 5
J105 J705
J137
J104
J106
J702
J133
J134
J135
J136
J115
J714
J113
J112
J201
J302
J114
J119
J122
J108
J402
J503
J506
J403
J505
J501
J504
J502
F-5-5
JEROM1
JDBAG1
JUSB1
JLAN1
JOP701
JJTAG1
JOP702
J15
J13
J722
J723
JSNS1
JSPK1
JBMTR1
JAMTR1
JFAN1
J230
J2303
J2308 J2305
J2304
J220
J2302
J716
F-5-6
5-4
J717
Chapter 5
JPSU1
JNCU1
JBAT2
JBAT1
JNCU2
J1
J4
CCD
J13
J21
J3
JLBP1
J3
J1
J8 J10
J3
J101
J712
J1
J1
CN1
CN2
CN105
J202
J203
J125
J127
J201
J4
J301
J23
J2
J6
J5
J401
J205
J204
F-5-7
5.4 Error Code
5.4.1 Outline
5.4.1.1 Error Code Outline
0008-3126
An error code is used to indicate a fault in a machine, and is indicated in the machine's LCD or reports, showing the nature (symptoms) of the fault. Using the error
code, the user or the service man can readily find out how to correct the fault by simply referring to the User's Manual or service manual.
An error code may be either of the following two types:
User Error Codes
A fault indicated as a user error code is one that can easily be corrected by the user, as by operating the machine. It takes the form of "#+number."
Service Error Codes
If a fault calls for a service man for correction, it is indicated as a service man error code in the form of "##+number" or "SYSTEM ERROR E+number."
Memo
A service error code expressed in the form of "##+number" will not appear on the LCD, Error Tx Report, or Activity Report while the machine remains
in factory default state. To check a service error code, shift bit 0 of service soft switch #1 SSSW SW01 to '1'.
5.4.1.2 Service Error Code
The descriptions on service error codes in this Manual are limited to “SYSTEM ERROR E + numeral.”
For descriptions on “## + numeral,” see the separately available G3/G4 Facsimile Error Code Service Handbook.
0008-3131
The following is a list of service error codes (SYSTEM ERROR E + numeral):
T-5-3
Code
Main cause/description
E000
fixing assembly faulty start-up (open circuit Check the connector of the fixing film unit.
in the main thermistor)
Replace the fixing film unit.
fixing assembly faulty start-up (open circuit Replace the DCNT Borad PCB.
Remedial action
in the sub thermistor)
fixing assembly faulty start-up (open circuit
in the fixing heater)
E001
fixing heater overheating (short-circuit in
the main thermistor)
fixing heater overheating (short-circuit in
the sub thermistor)
E002
fixing assembly low temperature (open
circuit in the main thermistor)
fixing assembly low temperature (open
circuit in the sub thermistor)
Check the connector of the fixing film unit.
Replace the fixing film unit.
Replace the DCNT Borad.
Check the connector of the fixing film unit.
Replace the fixing film unit.
eplace the DCNT Borad.
fixing assembly low temperature (open
circuit in the fixing heater)
5-5
Chapter 5
Code
Main cause/description
Remedial action
E010
main motor fault
Check the connector of the main motor.
Replace the main motor.
replace the DCNT Borad.
E021
developing rotary motor fault
Check the connector of the developing rotary motor.
Replace the developing rotary motor.
Replace the DCNT Borad PCB.
E022
developing rotary drive mechanism fault
Check the connector of the developing rotary drive sensor.
Check the connector of the drive motor.
Replace the developing rotary drive sensor.
Replace the drive motor.
Replace the DC controller PCB.
E071
ITB home position sensor fault
Check the connector of the ITB home position sensor.
Replace the ITB home position sensor.
Replace the DC controller PCB.
E078
secondary transfer roller drive mechanism
fault
Check the connector of the roller drive sensor.
Check the connector of the roller drive clutch.
Replace the main drive assembly (roller Drive sensor).
Replace the drum cartridge (roller drive cam).
Replace the DC controller PCB.
E100
scanner fault
Check the connector of the laser scanner assembly.
Replace the laser scanner assembly.
Replace the DCNT Borad.
E196
DCNT Borad memory fault
Replace the DCNT Borad.
E197
engine communication error
Replace the DCNT Borad.
E747
SCNT board memory fault
Replace the SCNT Borad.
E805
fan fault
Check the connector of the cooling fan.
Replace the cooling fan.
Replace the DCNT Borad.
5.5 Service Mode
5.5.1 Outline
5.5.1.1 Hardware Switches
This fax has the following hardware switches. Be sure not to use those switches not discussed herein; they are for use at the factory.
0008-1823
SCNT Board
Jumper switch (J971)
The clock IC is backed up with a lithium battery by short-circuiting with a jumper plug.
5.5.1.2 Service Data Setting
Service mode has the following service data items. These items can be checked/changed according to the menu on the display.
0008-1824
#SSSW (Service Soft Switch settings)
These setting items are for basic fax service functions such as error management, echo countermeasures, and communication trouble countermeasures.
#MENU (MENU switch settings)
These setting items are for communication functions, such as NL equalizer and transmission levels.
#NUMERIC PARAMETER (NUMERIC parameter settings)
These setting items are for inputting numeric parameters such as the various conditions for the RTN signal transmission.
#SPECIAL
These setting items are for telephone network control functions.
#NCU (NCU settings)
These setting items are for telephone network control functions such as the selection signal transmission conditions and the detection conditions, for the
control signals sent from the exchange.
#FAX
Do not use.
#SCAN
Do not use.
#PRINT
Do not use.
#NETWORK
Do not use.
#CODEC
Do not use.
#SYSTEM
Do not use.
#COUNTER (Counter indication)
Count data such as the read and print are displayed.
#REPORT (Report output)
Use it to output reports on various service data.
5-6
Chapter 5
#DOWNLOAD
Do not use.
#CLEAR (data initialization mode)
Various data are initialized by selecting one of these setting items.
#ROM (ROM management)
ROM data such as the version number and checksum are displayed.
The effective SSSWs/parameters and their default values in this machine are shown in Service Data Flowchart. However, detailed descriptions of only service data
newly added to this machine are provided. For descriptions of other service data, which have been used with existing machines, please see the G3 Facsimile SERVICE DATA HANDBOOK (Rev. 0), which is supplied separately.
5.5.1.3 Service Data Entry Method
0008-1830
You can enter the Service Mode with the following operation.
Menu
# SSSW
#
F-5-8
5.5.2 Service Soft Switch Settings (SSSW)
5.5.2.1 Outline
5.5.2.1.1 Explanation of # SSSW
0008-1883
t7
t6
t5
Bi
t4
Bi
Bi
Bi
t3
Bi
t2
Bi
t1
Bi
t0
SW01
Bi
The items registered and set by each of these switches comprise 8-bit switches. The figure below shows which numbers are assigned to which bits. Each bit has a
value of either 0 or 1.
0
0
0
0
0
0
0
0
F-5-9
Below are examples showing how to read bit switch tables.
Indicates that the
setting is "0".
Indicates that the
setting is "1".
Indicates the
default settings.
Bit
Function
1
0
0
1
2
3
4
5
6
7
Service error code
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Output
-
Not Output*
-
F-5-10
5.5.2.2 SSSW-SW14
5.5.2.2.1 Details of Bit 0 and Bit 1
0008-1885
Set the type of document scanning size (standard paper) to be used.
The following types are set in accordance with the combination of parameters of Bit 0 and Bit1.
T-5-4
(Bit0, Bit1)= (0, 0) A-series document
(0, 1) inch-type document
(1, 0) A-series document
(1, 1) A-series document
5-7
Chapter 5
5.5.2.3 SSSW-SW18
5.5.2.3.1 List of Functions
0008-1886
T-5-5
Bit
Function
1
0
0
Detection of carrier disconnection between the DCS
signal and the TCF signal
Yes
No*
1
Waiting time for carrier disconnection between the DCS
signal and the TCF signal
600 msec
300 msec*
2
Not used
-
-
3
Not used
-
-
4
Not used
-
-
5
Not used
-
-
6
Not used
-
-
7
Not used
-
-
5.5.2.3.2 Details of Bit 0
0008-1887
It is possible to select whether or not to detect carrieir disconnection between the DCS signal and the TCF signal during reception.
If the receiving machine returns an FTT signal while the other machine (PC-FAX) is transmitting a TCF siganl and a reception error occurs, set this bit to "1".
If thw error still occurs, set bit 1 of #SSSW SW18 to "1".
5.5.2.3.3 Details of Bit 1
0008-1889
It is possible to select the detection time for caarrier disconnection between the DCS signal and TCF signal during reception.
This bit is available for use when #SSSW SW18 Bit0 is set to "1".
If the symptom is not resolved by setting SW18 Bit 0 to "1," set this bit to "1."
5.5.3 Data Initialization Mode (CLEAR)
5.5.3.1 # CLEAR
Registration/settings of user data and service data are initialized with CLEAR ALL, and go back to factory defaults.
0008-3182
Reference
Since the TYPE setting of #CLEAR item goes back to STANDARD when #CLEAR ALL is executed, there is a need to change the TYPE setting to
conform to the communications standards of a specific country/region.
5.5.4 Test Mode (TEST)
5.5.4.1 Overview
5.5.4.1.1 Test Mode Overview
0008-1953
The following test modes are available from the menu on the display.
D-RAM tests
Writes data to DRAM image storage areas and reads that data to check operations.
Print test
Printing a test pattern in the printing area.
Modem, NCU tests
The frequency test, G3 signal transmission test, and V.34 G3 signal transmission test.
FACULTY test
Testing the sensors and functions of the operation panel.
5.5.4.2 DRAM Test
5.5.4.2.1 D-RAM Test
0008-1979
D-RAM test menu is selected by pressing the numeric key 1 from the test mode menu. D-RAM Test 1 writes data to the entire D-RAM region and reads it out to
check that operations are correct. D-RAM Test 2 just reads data at high speed.
5-8
Chapter 5
Operating
DRAM TEST
.......
40960KB
40960KB: D-RAM total memory capacity (bytes)
✽ : Indicates an address for which write testing is complete.
. : Indicates an address for which read testing is complete.
Error
Normal end
DRAM TEST
40960KB
complete
(no error)
Error display
WRT=33CC RD=33EC
ADR=BF840201
WRT : data written
RD : data read
ADR : address
Restart by pressing
Start button
(Normal end)
DRAM TEST
complete
40960KB
(error)
F-5-11
Before D-RAM test, output all image data in image memory. When D-RAM test is performed, all image data are cleared.
5.5.4.3 Print Test
5.5.4.3.1 PRINT Test
0008-1980
The Print Test menu is selected by pressing the numeric key 3 from the test mode menu.
In this test, various print patterns are output from the printer. As service print patterns, press the numeric key 2 from the Print Test menu to select "3-2: BLACK"
or press the numeric key 6 to select "3-6: ENDURANCE". Do not use the other patterns. They are for development and factory use.
Check for white stripes and unevenness on the Black pattern, and check for image shrinkig, stretching, soiling, and black strips on the Endurance pattern.
F-5-12
Memo
After completion of the print test, if the printing was normal, copy a document. If there is any defect in the copied image, there is a defect in the scan
section.
5.5.4.4 Modem Test
5.5.4.4.1 Modem Tests
0008-1981
The Modem Test menu is selected by pressing the numeric key 4 from the test mode menu.
These tests test modem and NCU transmission and reception. The modem tests check whether signals are sent correctly from the modem by comparing the sound
of the signals from the speaker with the sounds from a normal modem.
End this test by pressing the Stop/Reset key.
5-9
Chapter 5
T-5-6
Modem test type
Overview
Frequency test
The modem sends tonal signals from the modular jack and the
speaker.
G3 signal transmission test
The modem sends G3 signals from the modular jack and the speaker.
V.34 G3 signal transmission test
The modem sends V.34 G3 signals from the modular jack and the
speaker.
5.5.4.4.2 Frequency Test
0008-1982
The frequency test menu is selected by pressing the numeric key 2 from the MODEM test menu.
Signals of the frequencies below are sent from the modem using the modular jack and the speaker. The frequency can be changed with the numeric keys.
T-5-7
Numeric key
Frequency
0
462 Hz
1
1100 Hz
2
1300 Hz
3
1500 Hz
4
1650 Hz
5
1850 Hz
6
2100 Hz
5.5.4.4.3 G3 Signal Transmission Test
0008-1983
The G3 signal transmission test menu is selected by pressing the numeric key 4 from the MODEM test menu.
The G3 signals below are sent from the modem using the modular jack and the speaker. The Speed can be changed with the numeric keys.
T-5-8
Numeric button
Speed
0
300 bps
1
2400 bps
2
4800 bps
3
7200 bps
4
9600 bps
5
TC7200 bps
6
TC9600 bps
7
12000 bps
8
14400 bps
Memo
The transmission level for each frequency follows the service data.
5.5.4.4.4 V.34 G3 Signal Transmission Test
0008-1984
The V.34 G3 signal transmission test menu is selected by pressing the numeric key 8 from the MODEM test menu.
The V.34 G3 signals below are sent from the modem using the modular jack and the speaker by pressing the B/W Start key. The Baud rate can be changed with the
numeric keys, and the Speed can be changed with the cursor keys.
T-5-9
Numeric key
Baud rate
0
3429 baud
1
3200 baud
2
3000 baud
3
2800 baud
4
2743 baud
5
2400 baud
T-5-10
Cursor key
Speed
33.6 kbps
31.2 kbps
28.8 kbps
<>
26.4 kbps
24.0 kbps
21.6 kbps
19.2 kbps
16.8 kbps
14.4 kbps
12.0 kbps
9.6 kbps
5-10
Chapter 5
Cursor key
Speed
7.2 kbps
4.8 kbps
2.4 kbps
Memo
The transmission level for each baud rate and speed follows the service data.
5.5.4.5 Faculty Test
5.5.4.5.1 FACULTY Tests
0008-1992
The faculty tests are selected by pressing the numeric key 6 from the test mode menu.
These tests test the following faculties of this fax.
T-5-11
Test type
Overview
Sensor tests
Test whether the sensors are operating correctly.
Operation panel test
Tests whether the button switches on the control panel are operating
correctly.
Line signal reception test
Tests whether the NCU board signal sensor and frequency counter are
operating correctly.
5.5.4.5.2 Sensor Tests
0008-1993
The sensor test is selected by pressing the numeric key 3 from the faculty test menu. In this test, you can check the status of each sensor of this fax in items 1 to 4
on the display.
You can also check if sensors that use actuators and microswitches are operating correctly by moving the actuator or microswitch.
6-3 SENSOR
[1 ] - - - [ 4 ]
Pressing the 1 key
CRG of
FCV on
ALS [ON of of of of]
CRG
FCV
ALS
: Cartridge sensor on/of
: Front cover switch on/of
: Cassette recording paper sensor/Manual paper feed sensor
/Top sensor/Paper delivery sensor/Paper full sensor on/of
Pressing the 2 key
JAM of
TN of
JAM 000
TN253
JAM : Paper delivery jam detection on/of
TN
: Toner sensor on/of and toner amount
JAM000 : JAM code display
010:Pickup delay jam
020:Pickup stationary jam
030:Delivery delay jam
040:Delivery stationary jam
050:Wrap jam/Initial jam
060:Cover open jam
Pressing the 3 key
DS of DES of HPS of
DS
DES
HPS
: Document sensor on/of
: Document edge sensor on/of
: Home position sensor on/of
Pressing the 4 key
0000000000
Not used
F-5-13
5-11
Chapter 5
5.5.4.5.3 Operation Panel Tests
0008-1995
The operation panel test is selected by pressing the numeric key 7 from the faculty test menu.
In this test, check that the display, LED lamps and keys on the operation panel are operating correctly.
Display test
Pressing the B/W Start key from the operation panel menu, "H" is displayed 20 characters by 2 lines. The next time the B/W Start key is pressed, all the
LCD dots are displayed. Check for any LCD dots in the display that are not displayed.
LED lamp test
All the lamps on the operation panel light by pressing the B/W Start key after the display test. Check for any LED that does not blink during the test.
(However, the Energy Saver key does not go on at this time.)
Operation Key Test
The operation key test is selected with the B/W Start key after the LED lamp test is done. In this test, a character disappears when its operation key is
pressed. The list of characters and their operation keys is as follows. Check to make sure at this time that all characters properly disappear when their
operation keys are pressed.
T-5-12
Character
0-9,*,#
Operation key
Character
Operation key
Numeric key
J
SCAN key
A
Cursor key (+)
K
Hook key
B
Cursor key (-)
L
Redial/Pause key
FAX key
C
Set key
M
D
Menu key
P
Directory key
E
Status Monitor key
O
Clear key
D
Collate key
N
Coded Dial key
F
Image Quality key
Q
Energy Saver key
G
Enlarge/Reduce key
R
Paper Select key
H
Exposure key
S
Color Start key
I
COPY key
One-Touch Dial Key Test
The one-touch dial key test starts once all characters disappear in the operation key test.
The characters 0 to #, 0 to 6 corresponding to 01 to 19 are displayed, and a character disappears when its one-touch key is pressed. Check to make sure at
this time that all characters properly disappear when their one-touch keys are pressed.
5-12
Chapter 5
6-3 OPERATION PANEL
Press B&W Start key.
HHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHH
H pattern displayed
Press B&W Start key.
All LCD dots displayed
Press B&W Start key.
The LED lamps other than the
Energy Saver key go on.
Press B&W Start key.
0123456789*#ABCDEDFG
HIJKLMNOPQRS
When a key is pressed, the
corresponding character goes out.
When the entire
display has gone out
0123456789*#0123456
When a one-touch speed dialing
key is pressed, the corresponding letter goes out.
When the entire
display has gone out
yyyyyy WORLD: yyy
Press the Stop/Reset key to end the test.
F-5-14
5-13
Chapter 6 APPENDIX
Contents
Contents
6.1 Outline of Electrical Components..................................................................................................................................6-1
6.1.1 Cluth/Solenoid ............................................................................................................................................................................. 6-1
6.1.1.1 Cluth/Solenid...................................................................................................................................................................................................6-1
6.1.2 Motor/Fan .................................................................................................................................................................................... 6-1
6.1.2.1 Motor/Fan........................................................................................................................................................................................................6-1
6.1.3 Sensor........................................................................................................................................................................................... 6-2
6.1.3.1 Sensor ..............................................................................................................................................................................................................6-2
6.1.4 Switch .......................................................................................................................................................................................... 6-2
6.1.4.1 Switch/Speaker/Thermistor.............................................................................................................................................................................6-2
6.1.5 PCBs ............................................................................................................................................................................................ 6-3
6.1.5.1 PCBs................................................................................................................................................................................................................6-3
6.1.6 Variable Resistors(VR), LED, and Check Pins by PCB.............................................................................................................. 6-3
6.1.6.1 Variable Resistors (VR), Test Pins, Jumpers, and Switches...........................................................................................................................6-3
Chapter 6
6.1 Outline of Electrical Components
6.1.1 Cluth/Solenoid
6.1.1.1 Cluth/Solenid
0008-1743
[1]
[2]
[4]
[5]
[3]
F-6-1
T-6-1
NO.
Name
Notation
[1]
Developing rotary stopper solenoid
SL93
[2]
Multi-purpose tray pick-up solenoid
SL92
[3]
Roller engaging clutch
CL2
[4]
Registration clutch
CL1
[5]
Cassette pick-up solenoid
SL9
6.1.2 Motor/Fan
6.1.2.1 Motor/Fan
0008-1746
[2]
[7]
[8]
[3]
[9]
[4]
[5]
[1]
[6]
F-6-2
T-6-2
NO.
Name
Notation
[1]
Engaging motor
PM704
[2]
Developing rotary motor
DCM703
[3]
Toner cartridge motor
PM705
[4]
Fixing motor
DCM702
[5]
Main motor
DCM701
[6]
Cooling fan
FM721
[7]
Document feed Motor
DCM706
[8]
Flatbed Motor
DCM707
[9]
Reader cooling fan
FM722
6-1
Chapter 6
6.1.3 Sensor
6.1.3.1 Sensor
0008-1745
[11]
[9]
[10]
[6]
[1]
[8]
[4]
[2]
[5]
[3]
[7]
F-6-3
T-6-3
NO.
Name
Notation
[1]
Multi-purpose tray paper sensor
PS718
[2]
Fixing delivery paper sensor
PS1
[3]
Developing rotary engaging sensor
PS712
[4]
Front fixing paper detection sensor
PS720
[5]
Roller engaging sensor
PS714
[6]
Paper Delivery Sensor
PS721
[7]
Cassette Feeder Sensor
PS717
[8]
Cassette Paper Sensor
PS716
[9]
ADF Paper Sensor
PS722
[10]
ADF Feeder Sensor
PS723
[11]
CCD Unit HP Sensor
PS724
6.1.4 Switch
6.1.4.1 Switch/Speaker/Thermistor
0008-1747
[2]
[3]
[1]
F-6-4
T-6-4
6-2
NO.
Name
[1]
Door open detection switch
Notation
SW1
[2]
Speaker
SP1
[3]
Thermistor
TM1
Chapter 6
6.1.5 PCBs
6.1.5.1 PCBs
0008-1748
[12]
[16]
[15]
[13]
[14]
[17]
[7]
[1]
[6]
[3]
[5]
[11]
[8]
[9]
[2]
[4]
[10]
F-6-5
T-6-5
[1]
Waste toner detection PCB
[10]
Relay PCB
[2]
Registration detection PCB
[11]
Paper feeder Driver PCB
[3]
Density detection PCB
[12]
SCNT PCB
[4]
ITB home position detection PCB
[13]
Operation Panel PCB
[5]
Developing rotary/toner level detection PCB [14]
[6]
High-voltage power supply PCB
[15]
NCU Board
[7]
Sub high-voltage power supply PCB
[16]
Modular Board
[8]
Print Power supply PCB
[17]
Scaner Power supply PCB
[9]
DC controller PCB
Capacitor Board
6.1.6 Variable Resistors(VR), LED, and Check Pins by PCB
6.1.6.1 Variable Resistors (VR), Test Pins, Jumpers, and Switches
0008-1749
This section lists only the variable resistors (VR), LEDs, test pins, jumpers, and switches required for after-sales service in the field.
All other VRs, test pins, etc. are for the factory use only. The adjustment and check using these test pins, etc. require special tools, measuring instruments, and high
precision. Do not touch them in the field.
1) ITB home position detection PCB
SW71
J71
5
1
F-6-6
T-6-6
SW No.
Function
SW201
Test print switch
6-3
Jan 20 2006