OKIDATA OKIJET 2500 printer Service Manual

Page: 1
Service Manual - OKIJET 2500
Chapter 0 Introduction
Front Cover
OKIJET 2500 Service Manual
P/ N 59228801
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
03/20/98
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with
the pictures rendered at 300 dpi, which is ideal for printing, but does not display well
on most displays.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Table of Contents
Page
Service Manual - OKIJET 2500
0 Introduction
Front Cover
Disclaimer/Copyright
About This Manual
Organization
....Section 1 - SERVICE CALL PROCEDURES
....Section 2 - REPAIR ANALYSIS PROCEDURES (RAPs)
....Section 3 - IMAGE QUALITY REPAIR ANALYSIS
PROCEDURES (RAPs)
....Section 4 - REPAIR / ADJUSTMENT PROCEDURES
....Section 5 - PARTS LIST
....Section 6 - GENERAL PROCEDURES
....Section 7 - WIRING DATA
How To Use This Manual
Reference Symbology
Special Symbols
Signal Nomenclature
DC Voltage Levels
Switches and Relay Contacts
Back Cover
1 Service Call Procedures
Introduction
....Printer Maintenance
....Initial Actions
....System Checkout / Final Action
2 Repair Analysis Procedures (RAPs)
Error LED On RAP
Power LED Blinking RAP
Low Ink LED(s) On RAP
Error LED Flashing RAP
1.1 Power on RAP
2.1 Selection/Indication RAP
6.1 Carriage TAP
6.2 Encoder RAP
8.1 Paper Feed RAP
9.1 Blank Print RAP
3 Image Quality RAPs
IQ 1 Image Defect Entry RAP
IQ 1 Image Defect Entry RAP Table
4 Repair / Adjustment Procedures
REP 1.0 Printhead
REP 1.1 Paper Tray Assembly
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Table of Contents
REP 1.2 Cartridge Cover
REP 1.3 Top Cover
REP 1.4 Exit Guide
REP 1.5 Paper Feed / Carriage Assy.
REP 1.6 Power Supply
REP 1.7 Main Control Board
REP 1.8 Waste Ink Pad
REP 1.9 Pump
REP 1.10 Maintenance Station
REP 1.11 Encoder
REP 1.12 Control Panel Assembly
REP 1.13 Paper Path Sensor (SW 1)
REP 1.14 Back Pad
REP 1.15 Printhead Ribbon Cable
REP 1.16 Ink Level Sensor
ADJ 2.0 Printhead Alignment
5 Parts List
PL 1.1 Printer Components
PL 2.1 Paper Feed / Carriage Assembly Components (Part 1 of
3)
PL 2.1 Paper Feed / Carriage Assembly Components (Part 2 of
3)
PL 2.1 Paper Feed / Carriage Assembly Components (Part 3 of
3)
Part Number Index
6 General Procedures
Diagnostics
....GP 1 Printhead Test
....GP 2 Printing with DOS
Product Specifications
....Physical Characteristics
....Electrical Requirements
....Printer Capabilities
....Supplemental Items
Printer Overview and Technical Overview Introduction
....Printer Overview
........Printer Specifications
........Features and Operation
........Safety Notes
........Printer Installation
....Printer Operation
........Loading the paper
........Test print mode
........Connecting the printer to a computer
Page
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
Table of Contents
........Control panel
........Printing
....Printer Maintenance
........Cleaning
........Replacing the Printhead
........Troubleshooting
........Removal / Replacement of the printer components
Technical Overview
....Power and Control
........Standby power
........Run control functions
........Main Control Board
........Control Panel Assembly
........Bi-Directional Cable
....Printing and Priming
........Printing
........Print control
........Cleaning and Priming
....Ink Level Sensing
........Ink Cartridge Present
........Low Ink Detection
........Out of Ink Detection
....Carriage Drive
........Carriage drive
........Carriage movement at power on
....Encoder
........Status code
....Paper Supply / Paper Feed
........Paper supply
........Paper feed
........Load and eject mechanism
....Sensors and status indicators
........Sensors
........Status indicators
7 Wiring Data
Plug / Jack Location Index
Plug / Jack Location Drawings
....Figure 7-1. Main Control Board and Power Supply
....Figure 7-2. Carriage Assembly (Bottom View)
....Figure 7-3. Carriage
....Figure 7-4. Front View
Block Schematic Diagrams (BSDs)
....Chain 1 AC/DC Power Generation
....Chain 2 Selection and Indication
Page
76
77
78
79
80
81
82
83
84
85
86
87
88
89
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100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
Table of Contents
....Chain 3 Machine Run Control
....Chain 8 Paper Feed
....Chain 9 Print Control
Page
119
120
121
Page: 1
Service Manual - OKIJET 2500
Chapter 0 Introduction
Front Cover
OKIJET 2500 Service Manual
P/ N 59228801
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
03/20/98
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with
the pictures rendered at 300 dpi, which is ideal for printing, but does not display well
on most displays.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 2
Service Manual - OKIJET 2500
Chapter 0 Introduction
Disclaimer/Copyright
Disclaimer
This document may not be reproduced without the written permission of Okidata Training and
Publications. Every effort has been made to ensure the accuracy of the information contained in this
training course. Okidata is not responsible for errors beyond its control.
Copyright 1998 by Okidata
All rights reserved.
Edited by:
Okidata Training and Publications
Prepared by:
Multinational Customer and Service Education
Xerox Corporation, Rochester, New York 14644
Please address any comments on this publication to: Okidata's web site at: www.okidata.com
Telephone 609- 235- 2600
Facsimile 609- 222- 5320
Okilink Technical Training
Copyright Listing
OKIDATA is a registered trademark of Oki Electric Industry Company, Ltd.; marques deposee de Oki
Electric Industry Company, Ltd.; marca registrada, Oki Electric Industry Company, Ltd.
XEROX is a trademark of Xerox Corporation
Notice
All service documentation is supplied for informational purposes only. Okidata service documentation is
intended for use by certified, product trained service personnel only. Okidata does not warrant or
represent that such documentation is complete, nor does Okidata represent or warrant that it will notify or
provide to such customer any future changes to this documentation. Customer performed service of
equipment, or modules, components or parts of such equipment may affect the warranty offered by
Okidata with respect to such equipment. You should consult the applicable warranty for its terms
regarding customer or third party provided service. If the customer services such equipment, modules,
components or parts thereof, the customer releases Okidata from any and all liability for the customer
actions, and the customer agrees to indemnify, defend and hold Okidata harmless from any third party
claims which arise directly or indirectly from such service.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 3
Service Manual - OKIJET 2500
Chapter 0 Introduction
About This Manual
This manual contains Repair Analysis Procedures, Repair Procedures, Adjustment Procedures, Parts List,
Diagnostic Procedures, and Wiring Data information that will enable a Service Representative to repair the
Printer.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 4
Service Manual - OKIJET 2500
Chapter 0 Introduction
Organization
This manual is divided into seven sections. The title and description of each section are listed below.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 5
Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 1 - SERVICE CALL PROCEDURES
This section contains the following:
Initial Actions / System Checks
System Checkout
Final Action
Initial Actions / System Checks
This diagram identifies how to collect the data necessary to decide how to proceed with the service call. It
classifies the problem and refers you to the appropriate Repair Analysis Procedure.
System Checkout
The System Checkout procedure is used to verify that the printer is operating properly after a repair has
been made.
Final Action
The Final Action procedure identifies the steps that must be performed before finishing the repair.
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Page: 6
Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 2 - REPAIR ANALYSIS PROCEDURES (RAPs)
This section contains the Repair Analysis Procedures (RAPs) necessary to repair faults. When using a
RAP, always exit the procedure when the fault is fixed. Do not perform the remaining steps.
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Page: 7
Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 3 - IMAGE QUALITY REPAIR ANALYSIS PROCEDURES (RAPs)
This section contains the Repair Analysis Procedures (RAPs) necessary to repair print quality faults. The
first RAP, IQ 1 Image Defect Entry RAP, is used to classify a print quality problem and will reference the
RAP to be used to repair the problem. When using a RAP, exit the procedure when the fault is fixed. Do
not perform the remaining steps.
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Page: 8
Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 4 - REPAIR / ADJUSTMENT PROCEDURES
This section contains the repair and adjustment procedures for the printer.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 5 - PARTS LIST
This section contains the detailed Parts List for the printer.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 6 - GENERAL PROCEDURES
This section contains Diagnostic Procedures and Product Specifications for the Printer. An Overview and
Technical Overview section are also included.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Section 7 - WIRING DATA
This section contains Plug/ Jack Location Drawings and Block Schematic Diagrams (BSDs).
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Service Manual - OKIJET 2500
Chapter 0 Introduction
How To Use This Manual
The Service Call Procedures will direct you to the proper section of the Service Manual.
You should begin the service call with the Initial Actions / System Checks Procedure. From there, you will
be referenced to either Section 2, Status Indicator RAPs or Section 3, Image Quality RAPs.
If you are sent to Section 3, you will perform the IQ 1 Image Defect Entry RAP to classify the print quality
problem. You will then be directed to the proper RAP to begin your troubleshooting. From these RAPs
you may be referenced to other sections of the manual to make checks, adjustments or to replace parts.
When you have made a repair, return to the System Checkout / Final Action to complete the call.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Reference Symbology
Notes, adjustments, and parts lists support the checklists and the RAP information. The symbols that refer
to this supportive data are shown below.
Note
This symbol is used to refer to notes found on the same page.
Adjustments
ADJ 4.1 This symbol refers to an adjustment procedure located in Section 4 of this
Service Manual. The number adjacent to the symbol indicates the number that is
assigned to that adjustment.
Parts List
PL 10.6
Refers to the parts list located in Section 5 of this Service Manual. The number
after the PL designation indicates the number that is assigned to that part.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Special Symbols
Descriptions of all commonly used graphic symbols are included in order to aid in troubleshooting when
using the RAPs.
Interrupt Horizontal Signal
This indicates the continuation of a signal line which is interrupted in a horizontal
direction.
Standby Power Input
This indicates the continuation of a standby power line which is interrupted in the vertical
direction.
Left to Right Flow
This indicates the direction of signal flow.
Feedback
This indicates a feedback signal.
Flag
This is used to identify an area of a Circuit Diagram that you should check.
Ground
This indicates a machine ground.
LED / Phototransistor Sensor
This type of sensor is used in the paper path. It uses reflected light to switch the sensor
off and on.
Without Tag Change
This signal indicates that the area the triangle points to has not been modified by the tag
number in the circle.
This symbol indicates that the entire page has not been modified by the tag number in the
circle.
With Tag Change
This symbol indicates that the area the triangle points to has been modified by the tag
number in the circle.
This symbol indicates that the entire page has been modified by the tag number in the
circle.
WARNING
A warning is used to alert the personnel to an operating or maintenance procedure,
practice, or condition that, if not strictly observed, could result in injury or loss of
life.
CAUTION
A caution is used to alert the personnel to an operating or maintenance procedure,
practice or condition that, if not strictly observed, could result in damage to, or destruction
of, equipment.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Signal Nomenclature
The signal is named to imply the condition of the machine when the signal is available.
For example:
Logic state when the signal is available in its named state. In this case, the signal is LOW when a
document jam is sensed.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
DC Voltage Levels
DC voltages should be measured between the test point and machine GND, unless instructed otherwise.
The table below shows the values of the voltages.
Nominal Voltage
+5 VDC
+42 VDC
Logic State
H
L
H
L
Actual Voltage Ranges
+4.8 to +5.2 VDC
0.0 to +1.0 VDC
+39.0 to +44.0 VDC
0.0 to +3.0 VDC
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Switches and Relay Contacts
Safety interlock switch that is open.
Safety interlock switch that is closed.
Switch or relay contacts with momentary contacts shown normally open.
Switch or relay contacts with momentary contacts shown normally closed.
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Service Manual - OKIJET 2500
Chapter 0 Introduction
Back Cover
OKI
OKIJET 2500 Service Manual
P/ N 59228801
Printed in the U. S. A.
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Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 19
Service Manual - OKIJET 2500
Chapter 1 Service Call Procedures
Introduction
Use the Service Call Procedures as a maintenance guide when performing any service on the printer.
Printer Maintenance - This section contains a list of the printer subsystem components to be cleaned
and /or lubricated and the cleaning and lubricating materials to be used, when that subsystem is
accessed during a repair.
Initial Actions / System Checks - This diagram identifies and classifies the printer problem and refers
you to the appropriate RAP in order to repair the problem. When the problem has been repaired,
perform the System Checkout / Final Action.
System Checkout / Final Action - This procedure should be completed at the end of every repair call
to ensure that the printer is operating properly.
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Page: 20
Service Manual - OKIJET 2500
Chapter 1 Service Call Procedures
Printer Maintenance
Introduction
When the printer is being serviced, the following maintenance procedure should be performed.
Procedure
Clean the following parts every time the printer is serviced:
Description
Cover
Paper Feed Roller
Paper Feed Pinch rollers and Paper Feed Guide
Maintenance Station
Procedure
Clean using a Lint Free Tissue and water.
Clean using a Lint Free Tissue and water.
Clean using a Lint Free Tissue and water.
Clean using a Lint Free Tissue and water.
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Service Manual - OKIJET 2500
Chapter 1 Service Call Procedures
Initial Actions
1. QUESTION THE OPERATOR.
2. VERIFY, CLASSIFY AND REPAIR THE PROBLEM.
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Service Manual - OKIJET 2500
Chapter 1 Service Call Procedures
System Checkout / Final Action
Reset the Ink Level Sensing count to zero. Perform the following:
Install a Color Printhead with empty ink cartridges.
Run a Test Print.
Remove the Printhead and install a Color Printhead with full ink cartridges.
Run a Test Print.
The NVM counts are now set to zero.
Print a file.
The Printer prints the selected file.
Y N
Refer to Initial Action / System Checks to begin your repair.
Evaluate the print.
Is the image quality acceptable?
Y N
Go to the image quality RAP identified by the IQ 1 Image Defect Entry RAP (Section 3).
Print and check the "Printing Alignment Test pattern".
The alignment is good.
Y N Go to the Printhead Alignment Procedure (Section Four).
Clean exterior of machine. Use a lint free tissue and water. Provide a sample of the Test Print.
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Page: 23
Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
Error LED On RAP
Initial Action:
Ensure a color printhead is installed.
Remove the power cord from the printer for 10 seconds, then reinstall it.
Press the Power switch.
The Error LED is on steady.
Y
N
The Error LED is flashing.
Y
N
Press and hold the Resume/FF button for 2 seconds to print the demo print.
The Error LED is steady.
Y
N
The Error LED is flashing.
Y
N
Check the interface cable and connectors for an open wire or bad
connection. If OK, replace the Main Control Board.
Go to Error LED Flashing RAP.
Remove the power cord from the printer for 10 seconds, then reinstall it.
Press and hold the Power switch for about 2 seconds.
The carriage was noisy.
Y
N
The printhead stopped at each ink cartridge during the power-on cycle.
Y
N
Go to 6.2 Encoder RAP.
A
B
C
D
Go to 8.1 Paper Feed RAP.
Go to 6.1 Carriage RAP.
Go to Error LED Flashing RAP.
One or more low ink LED(s) are blinking.
Y
N
Go to 6.1 Carriage RAP.
Go to Low Ink LED(s) on RAP.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
Power LED Blinking RAP
Remove the power cord from the printer for 10 seconds, the reinstall it.
The Power LED blinks.
Y
N
Printer is OK.
Go to 2.1 Selection/Indication RAP.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
Low Ink LED(s) On RAP
Initial Action:
Ensure all the ink cartridges are full and properly seated.
Go to Flags 1 and 2. Check the wires and connections for an open circuit. The wires are good.
Y
N
Repair the wires or connections if possible.
Replace the main control board.
If the problem still exists, replace the Printer.
Replace the Ink Level Sensor (PL 2.1) located in Chapter 5.
Replace the main control board.
If the problem still exists, replace the printer.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
Error LED Flashing RAP
Note: This procedure will work only when the Error LED is flashing.
Note: In the following procedure, the Error LED and Power LED will be used to display an 8 bit binary
error code. The LEDs will flash in 1/2 second intervals. The code will be displayed 4 bits at a time. The
LED code is as follows (See Figure 1):
1 = Both Error and Power LEDs lit
0 = Error LED only is lit
1. Press and release the Resume/ FF button, while observing the Error and Power LEDs.
2. 4 bits will be flashed in 1/ 2 second intervals followed by a pause, then 4 more bits in 1/ 2 second
intervals. After the cycle, the Error LED will continue to flash.
3. Determine the code and go to the Error Code Chart (Table 1) for the corrective action.
4. Repeat step 1 as many times as necessary to determine the code.
Error Code
1000 1000
1000 1100
1100 1000
1110 1000
1100 1111
Error Description
ROM error
RAM error
EPROM error
CPU error
Carriage home position error
Corrective Action
Replace the Main Control Board
Replace the Main Control Board
Replace the Main Control Board
Replace the Main Control Board
Go to 6.1 Carriage RAP
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
1.1 Power on RAP
Refer to Figure 1. There is +42 VDC measured on the Main Control Board.
Y
N
Disconnect the power cord.
Check fuse F1 on the Power
Supply.
F1 is blown.
Y
N
Go to Flag 1 (Figure 2) and check the wires for an open circuit. If good, replace the Power
Supply. If problem still exists, replace the Main Control Board.
Replace the blown fuse.
If the problem is not corrected, replace the Power Supply (PL 1.1).
Refer to Figure 1. There is +5 VDC measured on the Main Control Board.
Y
N
Go to Flag 2 and check for a short to ground. If OK, replace the Power Supply. If problem still
exists, replace Main Control Board.
Replace the Main Control Board before replacing the Control Panel Assembly.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
2.1 Selection/Indication RAP
Load paper.
Disconnect and then reconnect the power cord while observing the LEDs.
All LEDs light momentarily when the power cord is reconnected.
Y
N
One or more LEDs light.
Y
N
Go to 1.1 Power on RAP.
Go to Flag 1 and Flag 2 and check for an open wire. If OK, replace the Control Panel
Assembly.
All LEDs go out in approximately 10 seconds.
Y
N
If the Power LED remains on (flashing), go to Flag 3 and check for an open wire. If OK,
replace the Control Panel Assembly.
Press and hold the Power button for approximately 2 seconds to turn on the printer.
Press and hold the Resume/FF button for 2 seconds.
Paper feeds.
Y
N
Go to Flag 5 and check for an open wire.
If good, go to 8.1 Paper Feed RAP.
A
A
Press the Cartridge Change button.
The carriage moves to the center position.
Y
N
Go to Flag 4 and check for an open wire.
If OK, replace the Control Panel Assembly.
For printer set up problems when printing from a DOS application, consult GP 2 Printing with
DOS Procedure in Section 6.
Examples of printer set up problems.
Just a few lines of data are printed and then the paper continues to line feed without printing.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
6.1 Carriage TAP
Disconnect and then reconnect the power cord.
Press and hold the Power switch.
The carriage moves.
Y
N
Go to Flag 1 and check the ribbon cable for being open or damaged.
Go to Flag 2 and check for an open circuit. If the wire is good, replace the Main
Control Board.
Check / replace the ribbon carriage cable.
Check the teeth on the belt.
Check the teeth on the carriage motor.
Check for 42 volts.
If 42 volts aren't being supplied by the power supply, replace the power supply.
Check / replace the carriage motor.
Perform the following:
Check that the Printhead ribbon cable going to CN4 on the Main Control Board is
connected properly.
Go to Flag 2 and Flag 3 and check for an open circuit.
If the wires are good, replace the Printhead Ribbon Cable (PL 2.1---see Chapter 5).
If the problem continues replace the Main Control Board (PL 1.1).
Check / replace the ribbon carriage cable.
Check the teeth on the belt.
Check the teeth on the carriage motor.
Check for 42 volts.
If 42 volts aren't being supplied by the power supply, replace the power
supply.
Check / replace the carriage motor.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
6.2 Encoder RAP
Go to Flag 1 and check the ribbon
Go to Flag 4 and check for an open circuit.
Replace the Encoder.
Go to 6.1 Carriage RAP.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
8.1 Paper Feed RAP
Clear any paper in the printer.
Disconnect and then reconnect the power cord.
Press and hold the Power switch for about 2 seconds.
Press and hold the Resume/FF button for 2 seconds to print the demo print.
The paper feeds or partially feeds.
Y
N
Check that the Paper Tray is installed correctly (REP 1.1)
Go to Flag 1 and check the cam sensor circuit for an open.
If OK, go to Flag 3 and check for an open circuit. If paper feed motor circuit is
defective, replace the paper feed motor.
If the wires are good, replace the Main Control Board.
Go to Flag 2 and check the paper feed switch circuit for an open.
If OK, go to Flag 3 and check for an open circuit.
Replace the Back pad.
If the problem still exists, replace the Main Control Board.
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Service Manual - OKIJET 2500
Chapter 2 Repair Analysis Procedures (RAPs)
9.1 Blank Print RAP
Initial Action:
Ensure that the Printhead latch is positioned towards the rear.
Unlatch the Printhead, reset the Printhead and latch it back into position. If problem still exists:
Replace the Printhead.
Go to Flag 1 and check the ribbon cable for being damaged.
Check the terminals of J11 on the Carriage Assembly and J12 on the Ink Cartridge for being
contaminated or damaged. Clean or repair as necessary.
If the problem still exists, replace the Printhead Ribbon Cable (PL 2.1--see Chatper 5).
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Service Manual - OKIJET 2500
Chapter 3 Image Quality RAPs
IQ 1 Image Defect Entry RAP
1. Print the Test Print:
a. Load paper into the Paper Tray.
b. Press and hold the Power on / Reset button for approximately 2 seconds and then release, to switch
the Printer power off.
c. While pressing and holding the Resume/ FF button press and release the Power on / Reset button.
The printer prints the test print shown in Figure 1. When the test print is complete, the printer initializes
and returns to the Ready status.
d. If the test print fails to print, repeat steps a through c.
2. Refer to the DEFECT Column in Table 1 that best describes the image quality problem.
3. If the problem is with external input only, replace the Main Control Board.
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Service Manual - OKIJET 2500
Chapter 3 Image Quality RAPs
IQ 1 Image Defect Entry RAP Table
DEFECT
Blank print
CAUSE
Printhead
White horizontal lines and
Streaks
The Printhead
Print is faint or missing
A non
nozzles may be
blocked.
Blurry or jagged vertical
lines
Print image is clipped or
off edge of media
SOLUTION
1. Remove and reinstall the Printhead.
2. Press the Cartridge Change / Clean
button for 2 seconds to clean and restore
the Printhead. Repeat if necessary.
If the problem still exists go to the 9.1 Blank
Print RAP.
Perform the following:
1. Press the Cartridge Change / Clean
button for 2 seconds to clean and restore
the Printhead.
2. Make another Test Print. If the print still
has lines and streaks repeat the above
process up to 5 times.
3. If the problem still exists, replace the
Printhead.
Replace the paper.
recommended
paper is being used
or the paper is
damp.
Defective Cartridge. Perform the following:
The ink supply may 1. Press and hold the Cartridge Change /
Clean button for 2 seconds to clean and
be nearly empty.
The Printhead
restore the Printhead.
nozzles may be
2. Run a Test Print. If the print is still faint,
blocked.
repeat the process up to 2 more times.
3. If the problem is still not corrected
replace the Printhead.
Printhead
Perform ADJ 2.0 Printhead Alignment
Alignment
Procedure
If the problem still exists switch the printer to
the High Quality print mode (in the printer
driver).
Paper
Turn the paper over to print on the opposite
side.
Print off edge of
Ensure that the Print Driver setup has the
media.
correct selection of media size and type.
Document margins Adjust margins in the application as necessary.
may exceed printer
margins.
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.0 Printhead
Parts List on PL 2. 2
Removal
1. Open the Cartridge Cover (PL 1.1).
2. Center the carriage using either of the following procedures:
Press the Cartridge Change / Clean button.
WARNING: Switch off the power. Disconnect the power cord from the wall outlet.
Grasp and manually move the belt (PL 2.1) in order to center the Printhead (Figure 1).
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (See below to Refer to the Replacement / Priming section of this
procedure.)
3. Move the Printhead lock lever toward the front of the printer.
4. Lift and remove the Printhead. Store it in the Storage Box.
Replacement / Priming
1. Install the Printhead onto the Printhead vertical guide.
2. Move the Printhead lock lever toward the rear of the printer.
3. Close the Cartridge Cover.
4. Press the Resume / FF button to prime the Printhead.
NOTE: The optional high capacity printhead is shown. Refer to the User's Documentation for illustrations
of the standard printhead.
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.1 Paper Tray Assembly
Parts List on PL 1. 1
Removal
1. Remove the Output Tray (PL 1.1).
2. Press the two handles toward the rear of the printer to release the latches (Figure 1).
3. Pivot the Paper Tray Assembly toward the back of the printer to disengage the three tabs at the bottom
of the Paper Tray Assembly from the tabs on the Paper Feed / Carriage Assembly.
4. Lift the Paper Tray Assembly from the printer.
Replacement
1. Retract the moveable face of the Paper Tray Assembly by pressing it toward the back of the Paper Tray
Assembly.
2. Insert the Paper Tray Assembly into the printer (with bottom of tray touching the bottom of the tray
opening on the printer) ensuring the moveable face is behind the white cam (near the bottom, on the left).
See Figure 2.
3. Engage the three tabs at the bottom of the Paper Tray Assembly with the tabs on the Paper Feed /
Carriage Assembly.
4. Rotate the Paper Tray Assembly toward the front of the printer.
5. Engage the two latches by gently pulling the handles downward and toward the front of the printer until
the latches snap into position.
6. Reinstall the Output Tray.
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.2 Cartridge Cover
Parts List on PL 1. 1
Removal
1. Open the Cartridge Cover (PL 1.1).
2. Utilizing a screwdriver or similar tool, slightly separate the Cartridge Cover and Top Cover at either pivot
to release the Cartridge Cover pivot from the Top Cover (Figure 1).
3. Lift the Cartridge Cover from the printer.
Replacement
1. Insert either Cartridge Cover pivot into the corresponding Top Cover pivot hole.
2. Utilizing a screwdriver or similar tool, slightly separate the Cartridge Cover and Top Cover at the
opposite pivot.
3. Position the Cartridge Cover pivot to engage with the pivot hole of the Top Cover.
4. Close the Cartridge Cover.
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.3 Top Cover
Parts List on PL 1. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the cartridge removed for long periods of time
will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after
reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord from the wall outlet.
2. Remove the Output Tray (PL 1.1).
3. Remove the Paper Tray Assembly (REP 1.1).
4. Remove the Cartridge Cover (REP 1.2).
5. Lay the printer on it's back; release the three front latch tabs (Figure 1).
CAUTION: While removing the Top Cover from the printer, take care not to damage the ribbon cable that
is connected to the Control Panel Assembly, which is located inside the Top Cover.
NOTE: The rear of the Top Cover has three locator tabs and two latch tabs.
6. Return the printer to its normal operating position. Lift and hold the front of the cover slightly while
releasing the two rear latch tabs. Then lift the rear of the cover and pivot towards the FRONT of the printer
to remove.
Replacement
1. Ensure the ribbon cable is properly routed and not twisted during Top Cover installation.
2. If previously disconnected, reconnect ribbon cable to the Control Panel Assembly.
3. Position the Top Cover on the printer. Align and latch the rear latches; then the front latches.
4. Reinstall the following:
a. Cartridge Cover (REP 1.2)
b. Paper Tray Assembly (REP 1.1)
c. Output Tray (PL 1.1)
d. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.4 Exit Guide
Parts List on PL 2. 2
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord from the wall outlet.
2. Remove the Output Tray (PL 1.1).
3. Remove the Cartridge Cover (REP 1.2).
4. Position both thumbs at the lower, front corners of the Exit Guide (Figure 1). Apply modest pressure
simultaneously toward the rear and up to unlatch the Exit Guide.
5. Rotate the guide approximately 90° up and toward the rear of the printer.
6. Lift the Exit Guide from the printer.
Replacement
1. Hold the Exit Guide so the star wheels (10) are facing the front of the printer.
2. Lower the Exit Guide into the printer to engage the pivots with the slots in the Paper Feed / Carriage
Assembly.
3. Rotate the Exit Guide completely toward the front of the printer.
4. Position both thumbs at the lower, front corners of the Exit Guide (Figure 1). Apply moderate pressure
simultaneously toward the rear and down to latch the Exit Guide.
5. Reinstall the Cartridge Cover (REP 1.2).
6. Reinstall the Output Tray (PL 1.1).
7. Reinstall the Printhead (REP 1.0).
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.5 Paper Feed / Carriage Assy.
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the Output Tray (PL 1.1).
3. Remove the Paper Tray Assembly (REP 1.1).
4. Remove the Cartridge Cover (REP 1.2).
5. Remove the Top Cover (REP 1.3).
6. Loosen screw; disconnect ground wire from ground plate near front, left corner of Paper Feed /
Carriage Assembly (Figure 1).
7. Disconnect ground wire from grounding plate at right side of printer (Figure 2).
8. Remove the screws (2) from the two front corners of the Paper Feed / Carriage Assembly (Figure 3).
9. Lift the front of the assembly slightly, then slide the assembly toward the front of the printer until it
contacts the front wall of the base.
10. Lift the front of the assembly to access the Main Control Board ribbon cable connectors, CN3 & CN4;
disconnect from the Main Control Board (Figure 4).
11. Remove the assembly from the base.
Replacement
1. Lift the front of the assembly to access the Main Control Board ribbon cable connectors, CN3 & CN4;
reconnect to the Main Control Board (Figure 4 - see above).
2. Allow the Paper Feed / Carriage Assembly to rest on the printer base. Slide the assembly rearward to
engage the rear mounts.
3. Reinstall the two front screws.
4. Reconnect the ground wire to the ground plate on the right side of the printer.
5. Reconnect the ground wire to the ground plate on the left, front corner of the printer; tighten screw.
6. Reinstall the following:
a. Top Cover (REP 1.3)
b. Cartridge Cover (REP 1.2)
c. Paper Tray Assembly (REP 1.1)
d. Output Tray (PL 1.1)
e. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.6 Power Supply
Parts List on PL 1. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink to dry out. Image quality defects a blank page could result. If necessary, prime the
printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the Power. Disconnect the power cord at the wall outlet.
2. Remove the Output Tray (PL 1.1).
3. Remove the Paper Tray Assembly (REP 1.1).
4. Remove the Cartridge Cover (REP 1.2).
5. Remove the Top Cover (REP 1.3).
6. Remove the Paper Feed / Carriage Assembly (REP 1. 5).
7. Disconnect Power Supply power cord connector CN1 from the Power Supply (Figure 1).
8. Remove the four mounting screws.
9. Slide the Power Supply toward the right side of the printer to disengage Power Supply connector CN2
from the Main Control Board connector CN1; lift the Power Supply from the printer.
Replacement
1. Position the Power Supply into the printer base.
2. Slide the Power Supply toward the left side of the printer to engage Power Supply connector CN2 with
the Main Control Board (Figure 1).
3. Install the four mounting screws.
4. Reconnect the Power Supply power cord connector CN1.
5. Replace the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Top Cover (REP 1.3)
c. Cartridge Cover (REP 1.2)
d. Paper Tray Assembly (REP 1.1)
e. Output Tray (PL 1.1)
f. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.7 Main Control Board
Parts List on PL 1. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the cartridge in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the Output Tray (PL 1.1).
3. Remove the Paper Tray Assembly (REP 1.1).
4. Remove the Cartridge Cover (REP 1.2).
5. Remove the Top Cover (REP 1.3).
6. Remove the Paper Feed / Carriage Assembly (REP 1. 5).
7. Remove the Power Supply (REP 1.6).
8. Disconnect Main Control Board connector CN2 from the Main Control Board (Figure 1).
NOTE: The two screws securing the PC interface cable connector to the Main Control Board are longer
than the others. Ensure to replace them in their correct positions.
9. Remove the eight mounting screws and ground wire (Figure 1).
NOTE: It may be necessary to detach the ribbon cable and ferrite from the printer base before removing
the Main Control Board.
NOTE: Exercise care not to deform the two PC interface cable connector wire-form locks during Main
Control Board removal.
10. Remove the Main Control Board.
Replacement
NOTE: There are 2 different length screws securing the Main Control Board. Be sure to reinstall the two
longer screws through the PC interface cable connector.
1. Position the Main Control Board into the printer base.
2. Reinstall the ground wire as per Figure 1.
3. Reinstall mounting screws.
4. Reconnect connector CN2 to the Main Control Board.
5. If previously detached, reattach the ribbon cable and ferrite to the printer base.
6. Replace the following:
a. Power Supply (REP 1.6)
b. Paper Feed / Carriage Assembly (REP 1. 5)
c. Top Cover (REP 1.3)
d. Cartridge Cover (REP 1.2)
e. Paper Tray Assembly (REP 1.1)
f. Output Tray (PL 1.1)
g. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.8 Waste Ink Pad
Parts List on PL 1. 1
Replacement
NOTE: There are 2 different length screws securing the Main Control Board. Be sure to reinstall the two
longer screws through the PC interface cable connector.
1. Position the Main Control Board into the printer base.
2. Reinstall the ground wire as per Figure 1.
3. Reinstall mounting screws.
4. Reconnect connector CN2 to the Main Control Board.
5. If previously detached, reattach the ribbon cable and ferrite to the printer base.
6. Replace the following:
a. Power Supply (REP 1.6)
b. Paper Feed / Carriage Assembly (REP 1. 5)
c. Top Cover (REP 1.3)
d. Cartridge Cover (REP 1.2)
e. Paper Tray Assembly (REP 1.1)
f. Output Tray (PL 1.1)
g. Printhead (REP 1.0)
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Paper Feed / Carriage Assembly (REP 1. 5)
3. Remove Waste Ink Pad retainer by releasing the four locking tabs with screwdriver or other similar tool
(Figure. 1).
Replacement
1. Ensure flange on one end of the pad retainer is toward the right side of the printer.
2. Snap the retainer into position.
3. Replace the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Top Cover (REP 1.3)
c. Cartridge Cover (REP 1.2)
d. Paper Tray Assembly (REP 1.1)
e. Output Tray (PL 1.1)
f. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.9 Pump
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality defects or a blank page could result. If necessary,
prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Paper Feed / Carriage Assembly (REP 1. 5)
3. Remove the Pump from the Paper Feed / Carriage Assembly.
a. Note routing of inlet tube; disconnect tube at connector beneath Maintenance Station (Figure 1).
b. Note routing of outlet tube; remove cable tie; slide tube through frame.
c. Remove two Pump mounting screws. (Figure 2).
d. Slide pump from motor shaft.
Replacement
1. Install the pump onto the motor shaft.
2. Reinstall the two mounting screws.
CAUTION: Ensure the pump tubing is not kinked or otherwise restricted during reinstallation.
3. Route inlet tube as shown in Figure 1; reconnect; clamp into position.
4. Route outlet tube as shown in Figure 1; install two cable ties on tube at either side of frame to ensure
tube exits onto Waste Ink Pad.
5. Reinstall the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Top Cover (REP 1.3)
c. Cartridge Cover (REP 1.2)
d. Paper Tray Assembly (REP 1.1)
e. Output Tray (PL 1.1)
f. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.10 Maintenance Station
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality problems or a blank page could result. If
necessary, prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
3. Observe the routing of the tube from the Maintenance Station to the connector located below the
Maintenance Station. Disconnect this tube at the tube connector.
4. Move the Printhead carriage to the extreme right side of the printer.
5. Remove the mounting screw (Figure 1).
6. Lift and hold the left side of the paper pressure baffle approximately six millimeters away from the
Maintenance Station.
NOTE: Observe the tube routing during Maintenance Station removal.
7. Slide the Maintenance Station toward the front of the printer to disengage the mounting tabs, then lift
upward to remove Maintenance Station from the printer.
Replacement
CAUTION: Ensure the Printhead carriage is positioned to the extreme right side of the printer.
1. Route the Maintenance Station tube as observed during removal.
2. Lift and hold the left side of the paper pressure baffle approximately six millimeters away from the
Maintenance Station.
3. Lower the Maintenance Station into position to insert the mounting tabs.
4. Slide the Maintenance Station toward the rear of the printer to engage the mounting tabs.
5. Secure with mounting screw (machine threads).
6. Connect tube to its mating connector.
7. Ensure tube is routed between the pinch arm and the Maintenance Station body (Figure 2).
8. Reinstall the following:
a. Top Cover (REP 1.3)
b. Cartridge Cover (REP 1.2)
c. Paper Tray Assembly (REP 1.1)
d. Output Tray (PL 1.1)
e. Printhead (REP 1.0)
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Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.11 Encoder
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality problems or a blank page could result. If
necessary, prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Paper Output shelf (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Paper Feed / Carriage Assembly (REP 1. 5)
f. Maintenance Station (REP 1.10).
3. Remove the belt (PL 2.1) from the carriage motor pulley (right end).
4. Remove the belt from the Encoder pulley (left end).
CAUTION: A ribbon cable is attached to the bottom of the carriage assembly. Do not damage it while
removing the carriage assembly.
5. Rotate the carriage shaft cams so that their flats are aligned with the sides of the slot on each side
frame (Figure 1).
NOTE: Expect moderate to heavy resistance when removing carriage end cams from printer side frames.
CAUTION: Ensure no portion of carriage is beneath ink level sensor during carriage removal.
Simultaneously slide both cams from their respective slots (Figure 2).
CAUTION: Take care not to damage ribbon cable while removing the carriage.
6. Remove the carriage from printer side frames (Figure 2).
7. Position the Paper Feed / Carriage Assembly as shown in Figure 3..
8. Disconnect the Encoder connector (J4) from the Relay BOARD (Figure 3).
NOTE: Observe Encoder harness routing before removing Encoder.
9. Release the Encoder harness from the carriage tabs.
10. Return the Paper Feed / Carriage Assembly to its upright position.
11. Remove the screw and ground strap (Figure 4).
12. Remove the two Encoder plate mounting screws; remove the Encoder plate and Encoder (Figure 4).
13. Disconnect harness from Encoder.
14. Remove the screw securing Encoder to Encoder plate; remove Encoder; retain spring.
Replacement
1. Position and hold the spring on the plate; install Encoder on the plate; reinstall the screw securing
Encoder to the plate, but DO NOT tighten.
2. Route the Encoder harness through Paper Feed / Carriage Assembly.
3. Reinstall Encoder on Paper Feed / Carriage Assembly; install two mounting screws and the ground
strap.
4. Reconnect Encoder harness (J4) to Relay Board; secure harness to carriage tabs.
Caution: It is physically possible to cross-connect the Encoder Harness (J4) and the Low-ink Sensor (J2)
on the Relay Board since they use the same type of connector. By doing so, the Main Logic Board may be
damaged.
5. Reinstall Maintenance Station; reinstall the machine screw.
6. Reconnect Maintenance Station tube.
7. Ensure tube is properly located behind the pinch arm. Consult Maintenance Station Replacement, REP
1.10.
8. Reinstall carriage into Paper Feed / Carriage Assembly. Ensure carriage ribbon cable is properly
secured and not twisted.
9. Rotate both carriage shaft cams to align pointer with index mark (Figure 5).
10. Reinstall carriage belt onto Encoder pulley (left side).
11. Reinstall carriage belt onto drive motor pulley.
12. Tighten screw that secures Encoder to the plate.
13. Ensure both ground straps (left and right side) are firmly contacting the carriage shaft. Reform straps
as required.
14. Reinstall the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Top Cover (REP 1.3)
c. Cartridge Cover (REP 1.2)
d. Paper Tray Assembly (REP 1.1)
e. Output Tray (PL 1.1)
f. Printhead (REP 1.0)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
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Page: 47
Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.12 Control Panel Assembly
Parts List on PL 1. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality problems or a blank page could result. If
necessary, prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
3. Position the Top Cover on its top.
NOTE: There is non-captured hardware under the Control Panel Assembly. DO NOT reposition the Top
Cover with the control panel assembly board removed.
4. Remove the mounting screws (3) from the Control Panel Assembly; remove the board (Figure 1).
5. Disconnect the ribbon cable from the board.
Replacement
1. Connect the ribbon cable to the Control Panel Assembly.
2. Ensure the buttons and lenses are properly positioned in the Top Cover. Carefully install the board into
the Top Cover. Secure with the three mounting screws.
3. Reinstall the following:
a. Reinstall the Top Cover (REP 1.3).
b. Reinstall the Cartridge Cover (REP 1.2).
c. Reinstall the Paper Tray Assembly (REP 1. 1).
d. Reinstall the Output Tray (PL 1.1).
e. Reinstall the Printhead (REP 1.0).
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 48
Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.13 Paper Path Sensor (SW 1)
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality problems or a blank print could result. If
necessary, prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Exit Guide (REP 1.4)
f. Paper Feed / Carriage Assembly (REP 1. 5)
3. Position the Paper Feed / Carriage Assembly as shown in Figure 1.
4. Disconnect J3 from the Relay Board. See Figure 1.
5. Remove mounting screw.
6. Remove Paper Path Sensor.
Replacement
1. Position the Paper Path Sensor (SW 1) in the Paper Feed / Carriage Assembly. Reinstall the mounting
screw.
2. Connect J3 to the Relay BOARD.
3. Reinstall the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Exit Guide (REP 1.4)
c. Top Cover (REP 1.3)
d. Cartridge Cover (REP 1.2)
e. Paper Tray Assembly (REP 1.1)
f. Output Tray (PL 1.1)
g. Printhead (REP 1.0)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 49
Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.14 Back Pad
Parts List on PL 2. 1
Removal
CAUTION: Leaving the Printhead removed for long periods of time will cause the ink nozzles to dry out.
Image quality problems or a blank print could result. If necessary, prime the printhead after reinstallation.
(REP 1.0)
1. Remove the Printhead (REP 1.0). Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Exit Guide (REP 1.4)
f. Paper Feed / Carriage Assembly (REP 1. 5)
3. Position the Paper Feed / Carriage Assembly as shown in Figure 1
4. Remove the Back Pad mounting screw (Figure 1).
5. Remove the retainer bracket and spring.
6. Remove the Back Pad.
Replacement
1. Position the Back Pad in the Paper Feed / Carriage Assembly.
2. Reinstall the spring; then the mounting bracket.
3. Reinstall the mounting screw.
4. Reinstall the following:
a. Paper Feed / Carriage Assembly (REP 1. 5)
b. Exit Guide (REP 1.4)
c. Top Cover (REP 1.3)
d. Cartridge Cover (REP 1.2)
e. Paper Tray Assembly (REP 1.1)
f. Output Tray (PL 1.1)
g. Printhead (REP 1.0)
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
Page: 50
Service Manual - OKIJET 2500
Chapter 4 Repair / Adjustment Procedures
REP 1.15 Printhead Ribbon Cable
Parts List on PL 2. 1
Removal
CAUTION: Store the Printhead in the Storage Box. Leaving the Printhead removed for long periods of
time will cause the ink nozzles to dry out. Image quality problems or a blank page could result. If
necessary, prime the printhead after reinstallation. (REP 1.0)
1. Remove the Printhead (REP 1.0. Store the Printhead in the Storage Box.
WARNING: Switch off the power. Disconnect the power cord at the wall outlet.
2. Remove the following:
a. Output Tray (PL 1.1)
b. Paper Tray Assembly (REP 1.1)
c. Cartridge Cover (REP 1.2)
d. Top Cover (REP 1.3)
e. Paper Feed / Carriage Assembly (REP 1. 5)
3. Remove the belt (PL 2.1) from the carriage motor pulley (right end).
4. Remove the belt from the Encoder pulley (left end).
5. Rotate the carriage shaft cams so that their flats are aligned with the sides of the slot on each side
frame (Figure 1).
NOTE: Expect moderate to heavy resistance when removing carriage from printer side frames.
CAUTION: Ensure no portion of carriage is beneath Ink Level Sensor during carriage removal. During
removal / replacement, it is necessary to simultaneously slide both cams from / to their respective slots. A
ribbon cable is attached to the carriage board. Do not damage the jack or connector lock while removing
carriage (Figure 2).
6. Remove the carriage from the Paper Feed / Carriage Assembly.
7. Remove the carriage shaft from carriage.
8. Position the carriage upside down (Figure 3).
9. Slide the lock to the unlocked position.
10. Disconnect the ribbon cable from the carriage board.
11. Slide the ribbon cable from the carriage cable restraint.
12. Note the installed position of the ribbon cable on the Paper Feed / Carriage Assembly in the area
shown in Figure 4c.
13. Release the cable from the two cable edge restraints.
14. Slide the cable to the left through the 45° slot; then pull the cable upward and out through the slotted
opening.
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