EPSON Stylus COLOR 480 Color Inkjet Printer SERVICE MANUAL
The EPSON Stylus Color 480 is a compact color inkjet printer designed for high-quality graphic printing. With its 720dpi resolution and MACH technology, it delivers precise, vibrant prints. The printer features a built-in auto sheet feeder for convenient paper handling. It is compatible with Windows operating systems and comes with an IEEE-1284 parallel interface.
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SERVICE MANUAL
Color Inkjet Printer
EPSON STYLUS COLOR 480
SEIJ00002
Notice
o All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
o All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
o The contents of this manual are subject to change without notice.
o All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
o The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof.
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their respective owners. EPSON disclaims any and all rights in those marks.
Copyright © 2000 SEIKO EPSON CORPORATION. Printed in Japan.
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER
Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings.
WARNING
Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY
MAINTENANCE OR REPAIR PROCEDURES.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED
FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/
RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT
CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS
ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo 720 / Stylus
Photo EX3. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
Contents
This manual consists of six chapters and Appendix.
CHAPTER 1.PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2.OPERATING PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.
CHAPTER 3.TROUBLESHOOTING
Provides the step-by-step procedures for the troubleshooting.
CHAPTER 4.DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for dissaembling and assembling the product.
CHAPTER 5.ADJUSTMENTS
Provides Epson-approved methods for adjustment.
CHAPTER 6.MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.
APPENDIXProvides the following additional information for
reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics
Symbols Used in This Manual
Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE messages.
W A R N I N G
Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.
C A U T I O N
Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.
C H E C K
P O I N T
May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.
Rev. A
Revision
Rev. B
Issued Date
May, 11 2000
18, July 2000
Revision Status
Description
First Release
* Page 72: Fig 4-2, Fig 4-3 was revised due the change of the top housing securing screw number.
* Page 76: Fig 4-11, Fig 4-12 was revised due to the addition of the Front Housing (Stacker Guide.)
* Page 139: The Exploded diagram was changed with new figure. The Front Housing (Stacker Guide) was
added in the Exploded diagram.
* Page 141: Ref. Number 108 Front Housing (Stacker Guide) was added in the parts list.
Product Description
CE Marking (for 220V - 240V) ................................................................. 19
Environmental Conditions ....................................................................... 19
IEEE-1284 Parallel I/F (Forward Channel) .............................................. 21
IEEE-1284 Parallel I/F (Reverse Channel).............................................. 22
Receive Data Buffer Full Operation ..............................................................25
Panel-less control & Status Indication..................................................... 25
Error Indication on Status Monitor 3 .............................................................25
Operating Principles
Paper Feeding Mechanism ..................................................................... 36
Paper Loading Mechanism (ASF Unit).................................................... 37
Ink System Mechanism ........................................................................... 40
Pump Unit & Wiper mechanism .................................................................... 40
......................................................... Electrical Circuit Operating Principles 44
C367 PSB/PSE board ............................................................................. 44
C367MAIN-B Board ................................................................................ 46
PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit ....................................... 48
Troubleshooting
Disassembly and Assembly
Work Completion Check ......................................................................... 70
Waste drain ink pad unit removal ............................................................ 80
HP/PE/IC Sensor removal....................................................................... 85
Ink system unit removal (Cap & Pump unit ) ........................................... 87
Paper Eject Roller removal ..................................................................... 89
Disassembling ASF frame unit ................................................................ 96
Adjustment
Required Adjustment............................................................................. 100
Adjustment Program feature ................................................................. 101
Adjustment Program Installation Procedure .......................................... 102
Adjustment Program Initial Setting menu .............................................. 103
Sequential Repair Service Program feature ............................................... 104
Printhead replacement .......................................................................... 108
Main board replacement........................................................................ 111
CR unit replacement or removal............................................................ 115
CR motor replacement or removal ........................................................ 115
Printer mechanism replacement............................................................ 116
Waste ink pad replacement.................................................................. 116
Individual service adjustment program feature ........................................... 117
Head cleaning function.......................................................................... 117
Protection counter check/reset.............................................................. 117
EEPROM check function....................................................................... 118
Refurbishment for DOA ......................................................................... 119
Maintenance
Service Maintenance............................................................................. 123
Appendix
Major Component Unit .......................................................................... 129
EEPROM Address Map ........................................................................ 131
PRODUCT DESCRIPTION
C H A P T E R
EPSON Stylus COLOR 480
1.1 Overview
Stylus Color 480 is developed newly for the low end product and realize a high quality graphic printing with the low price.
1.1.1 Features
Major features of this printer are as follows; o
High quality color printing n
720dpi (H) x 720 dpi(V) dpi printing.
n
MACH technology (4 color printing. YMCK) n
Micro wave, Super micro wave printing n
Multi-Shot & Variable dot printing o
Control panel less
Host computer controls the printer.
o
Built in I/F n
IEEE-1284 parallel
Windows exclusive printer.
o
Small, space-saving o
Built-in auto sheet feeder n
Holds 100 cut-sheets (65g/m2) n
Holds 10 envelopes n
Holds 10 transparency films n
Holds 30 special paper
Product Description Overview
Figure 1-1. External View
Revision B
10
EPSON Stylus COLOR 480
1.2 Basic Specification
1.2.1 Printing Specification
PRINTING METHOD
o
On demand ink jet
NOZZLE CONFIGURATION
o
Black: o
Color:
48 nozzles x 1 row
45 nozzles x 1 row
15 nozzle is assigned for each 3 colors in the one row.
(Cyan, Magenta, Yellow)
2 . 2 5 7 8 ( 3 2 / 3 6 0 " )
# B 4 8 # Y 1 5
# Y 1
# M 1 5
# M 1
# C 1 5
# B 1 # C 1 unit: mm
Figure 1-2. Nozzle Configuration (Seen from the Back of the Head)
Revision B
PRINTING DIRECTION
o Bi-direction with logic seeking
PRINTING SPEED
o Character mode: Refer to the table below
Table 1-1. Character mode: black only
Character pitch
Character
Quality
Printable
Columns
CR Speed
10CPI LQ 80column 20IPS o Raster graphics mode: Refer to the table below.
Table 1-2. Printing Speed (Raster Graphics Mode)
Horizontal
Resolution
Printable
Area
Available Dot CR Speed Notes
480 dpi
360 dpi
720 dpi
8.26 inch
8.26 inch
8.26 inch
3968
2976
5952
14.1 IPS
20 IPS
20 IPS
Black mode
--
--
CHARACTER SPECIFICATION
o
Character code: None. International character sets is not available. Only following
characters are available.
n ASCII 37 characters + Space code + One Symbol
Alphabet A-Z (Code 41H-5AH)
Number 0-9 (Code 30H-39H)
SPACE (Code 20H)
Symbol # (Code 23H) n Typeface
Bit map LQ font: EPSON Courier 10CPI
Product Description Basic Specification 11
EPSON Stylus COLOR 480
CONTROL CODE
o ESC/P for Stylus Color 480 o
EPSON Remote command
PAPER FEED SPECIFICATION
o Feeding Method:
Friction feed with ASF o Paper Path:
Cut sheet ASF (Top entry - Front out) o
Line Interval: Programmable by 1/6 inch or 1/360 inch o Paper Feed Speed:
271.9ms 10 ms (10.16 mm (2/5 inch) at paper feed)
1.67inch/sec (at continuous paper feed)
1.2.2 Paper Specification
CUT SHEET
n
Size:
A4 (210 x 297 mm)
Letter (216 x 279 mm)
B5 (182 x 257 mm)
Legal (216 x 356 mm)
Statement (139.7mm x 215.9mm)
Executive (190.5 x 254 mm) n
Thickness (plain paper):
0.08mm to 0.11mm(0.003 to 0.004”) n
Weight:
64g/m 2 to 90g/m 2 (17lb to 24lb / 55 to 78 kg) n
Paper quality:
Exclusive paper, Bond paper, Plain paper, recycled paper n
ASF hopper available capacity
100 sheets
C A U T I O N n
No wrinkled, scuffing, torn or folded paper be used.
n
No curled paper more than 5mm be used.
Revision B
Product Description Basic Specification 12
EPSON Stylus COLOR 480
TRANSPARENCY, GLOSSY PAPER
n
Size
A4 (210mm x 297mm)
Letter (216mm x 279mm) n
Thickness
0.075mm to 0.085mm
n
Quality
Exclusive paper n
ASF hopper available capacity
1sheet
NOTE: Transparency printing is available only in the normal temperature
ENVELOPE
n
Size:
No.10 (241.3 mm x 104.8 mm)
DL (220 mm x 110 mm)
C6 (162 mm x 114 mm)
4”x 6”(220mm x 132mm) n
Thickness
0.16mm to 0.52mm
n
Weight
45g/m2 to 75g/m2 n
Quality
Bond paper, Plain paper, Air mail n
ASF hopper available capacity
10sheets
NOTE: * Envelope printing is available only in the normal temperature.
* Keep the longer side of the envelope horizontally at setting.
Revision B
C A U T I O N n
Use above mentioned paper at normal temperature.
(temperature = 15 to 25%, humidity = 40 to 60% RH) n
No wrinkled, scuffing, torn or folded paper be used.
n
No curled paper more than 5mm be used.
n
No paper with glue on flap be used.
n
No double envelops nor with window envelops be used.
n
Do not print on the back.
INDEX CARD
n
Size
A6 Index card (105mm x 148mm)
A5 Index card (148mm x 219mm)
5 x 8” Index Card (127mm x 203mm)
10 x 8” Index card (127mm x 203mm) n
Thickness
Less than 0.23mm
n
ASF hopper available capacity
30sheets
Product Description Basic Specification 13
EPSON Stylus COLOR 480
SPECIAL PAPER
Paper type: EPSON exclusive paper n
Photo Quality Ink Jet Paper
A4 (210 x 297 mm)
A6 (105 x 148 mm)*
B5 (182 x 257mm)
Letter (216 x 279 mm)
Legal (216 x 356 mm)
5 x 8” (127 x 203 mm)*1
8 x10” (100 x 148 mm)*1 n
360 dpi Ink Jet Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm) n
Transparencies *2)
A4 (210 x 297 mm)
Letter (216 x 279 mm) n
Photo Quality Glossy Film*2)
A4 (210 x 297 mm)
A6 (105 x 148 mm)*1
Letter (216 x 279 mm) n
Photo Paper (PP2)
A4 (210 x 297 mm)
Letter (216 x 279 mm)
Photo quality card 2 (100 x 148 mm)*1
Panorama (210 x 594 mm)
4” x 6”(113.6 x 175.4)
100mm x 150mm
200mm x 300mm n
Photo Sticker
A4 (210 x 297 mm)
A6 (105 x 148 mm)
8 “x 10” (100 x 148 mm)*1
Product Description Basic Specification
Revision B n
Iron-ON Transfer Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm) n
Matte Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm) n
High Quality Normal Paper
A4 (210 x 297 mm)
NOTE: *1): Set the enclosed loading support sheet as the last sheet in the ASF.
*2): Set the plain paper as the last sheet in the ASF.
C A U T I O N Use above mentioned paper at normal temperature.
(temperature = 15 to 25%, humidity = 40 to 60% RH)
14
EPSON Stylus COLOR 480
1.2.3 Printable Area
CUT SHEET
Refer to the following table. As for the each margin area, refer to the Figure 1-3
Paper Size
A4
Letter
B5
Legal
Statement
Executive
Table 1-3. Printable Area for Cut Sheet
Paper
Width
210mm
Paper
Length
297mm
LM/RM/
TM
3mm
BK Bottom
Margin(*1)
Color Bottom
Margin
(*1,*2)
14 mm or more than 3 mm
21mm or more than 3mm
216mm
182mm
216mm
139.7mm
190.5mm
279mm
257mm
356mm
215.9mm
254mm
3mm
3mm
3mm
3mm
3mm
14 mm or more than 3 mm
21mm or more than 3mm
14 mm or more than 3 mm
21mm or more than 3mm
14 mm or more than 3 mm
21mm or more than 3mm
14 mm or more than 3 mm
21mm or more than 3mm
14 mm or more than 3 mm
21mm or more than 3mm
NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper length is designated with “ESC(S” command.) However, the printing quality is not guaranteed in the area ranging from 3mm to 14mm, from the form lower end. When the paper length is not designated, the bottom margin must be wider than 14 mm.
*2): Bottom margin for color printing can be set up 3mm at minimum when the paper length is designated with “ESC(S” command.). However, guaranteed print area of color printing is narrow than BK
(monochrome)printing. This is due to the each color nozzles is assigned in the one row nozzles.
Product Description Basic Specification
LM
Printable area
print re
Figure 1-3. Printable Area
RM
Revision B
TM
PL
BM
15
EPSON Stylus COLOR 480 Revision B
ENVELOP (PRINTABLE AREA)
Refer to the following table.
Paper Size
#10
DL
C6
Paper
Width
Table 1-4. Printable area for Envelop
Paper
Length
LM RM/TM
BK
Bottom
Margin(*1
)
241mm
216mm
182mm
104.8 mm
279mm
257mm
28mm
7mm
3mm
3mm
3mm
3mm
14 mm or more than
3 mm
14 mm or more than
3 mm
14 mm or more than
3 mm
Color
Bottom
Margin
(*1,*2)
21mm or more than
3mm
21mm or more than
3mm
21mm or more than
3mm
NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper length is designated with “ESC(S” command.) However, the printing quality is not guaranteed in the area ranging from 3mm to 14mm, from the form lower end. When the paper length is not designated, the bottom margin must be wider than 14 mm.
*2): Bottom margin for color printing can be set up 3mm at minimum when the paper length is designated with “ESC(S” command.). However, guaranteed print area of color printing is narrow than BK
(monochrome)printing. This is due to the each color nozzles is assigned in the one row nozzles.
L M
Printable area
R M
B M
T M
Figure 1-4. Printable area for Envelop
1.2.4 PG Adjust Lever
Unlike other products, this printer dose not have the PG (Platen Gap) adjust lever in the printer mechanism. So, the Platen Gap value can not be changed according to the paper thickness.
Product Description Basic Specification 16
EPSON Stylus COLOR 480
1.2.5 Ink Cartridge
INK CARTRIDGE (BLACK)
o
Type: o
Color:
Exclusive cartridge
Black o
Print capacity: 270 pages/A4 (ISO/IEC 10561 Letter Pattern at 360dpi) o
Ink life: 2 years from production date o
Storage temperature: n
-30
°
C to 60
°
C
Being transported, within 120 hours at 60
°
C, within a month at 40
°
C n
-30
°
C to 40
°
C
Packing storage, within a month at 40
°
C n
-20
°
C to 40
°
C
Mounted on the printer, within a month at 40
°
C o
Dimension: 19.8mm (W) x 52.7 mm (D) x 38.5mm (H)
52.7
19.8
18.3
38.5
Figure 1-5. Black Ink Cartridge
51.2
Revision B
COLOR INK CARTRIDGE
o
Type: o
Color:
Exclusive cartridge
Magenta, Cyan, Yellow o
Print capacity: 150 pages/A4 (360dpi, 5% duty each color) o
Ink life: 2 years from production date o
Storage temperature: n
-30 ° C to 60 ° C
Being transported, within 120 hours at 60 ° C, within a month at 40 ° C n
-30 ° C to 40 ° C
Packing storage, within a month at 40 ° C n
-20 ° C to 40 ° C
Mounted on the printer, within a month at 40 ° C o
Dimension: 42.9mm (W) x 52.7 mm (D) x 38.5mm (H)
52.7
51.2
42.9
38.5
41.4
Figure 1-6. Color Ink Cartridge
Product Description Basic Specification 17
EPSON Stylus COLOR 480
1.2.6 Input Data Buffer o
Buffer: 16Kbytes
1.2.7 Electric Specification
120V VERSION
o
Rated voltage: AC 120V o
Input voltage range: AC 99 -132V o
Rated frequency range: o
Input frequency range:
50 - 60Hz
49.5-60.5 Hz o
Rated current: o
Power consumption:
0.4A(Max 0.5A)
Approx. 21W (ISO/IEI 10561 Letter pattern)
Approx. 5W in Standby mode
Energy star compliant o
Insulation Resistance: 10 M ohms min.
(between AC line and chassis, DC 500V) o
Dielectric Strength: AC 1000 V rms. 1 minute or
AC 1200 V rms 1 second
(between AC line and chassis) o
Leak Current : less than 0.25mA(input:100V/50Hz) less than 0.75mA(input: 138V/60Hz)
220 - 240V VERSION
o
Rated voltage: AC 220 - 240V o
Input voltage range: AC 198 -264V o
Rated frequency range: o
Input frequency range: o
Rated current:
50 - 60Hz
49.5-60.5 Hz
0.2A (Max. 0.3A)
Revision B o
Power consumption: o
Insulation Resistance: o
Dielectric Strength: o
Leak Current :
1.2.8 Reliability o
Total print volume: o
Printhead Life:
Approx. 21W (ISO/IEI 10561 Letter pattern)
Approx. 5.5W in standby mode
Energy star compliant
10 M ohms min.
(between AC line and chassis, DC 500V)
AC 1500 V rms. 1 minute less than 0.75mA (input: 276V/60Hz)
: 10000 pages (A4.Letter) (except ESP,EIO,EPC)
: 20000 pages (A4, Letter) (ESP, EIO,EPC)
4000 million dots/nozzle
.
1.2.9 Safety Approvals
120V VERSION
o
Safeties standards: o
EMI:
UL1950 with D3
CSA C22.2 No.950 with D3
FCC part15 subpart B class B
CSA C108.8 class B
220V -240V VERSION
o
Safety standards: o
EMI:
EN60950(VDE)
EN55022 (CISPR Pub.22) Class B
EN55022 (CISPR Pub.22) Class B
1.2.10 Acoustic Noise o
Level Approx. 45dB(A) (According to ISO 7779)
Product Description Basic Specification 18
EPSON Stylus COLOR 480
1.2.11 CE Marking (for 220V - 240V) o
Low Voltage Directive 73/23/eec : ENN60950 o
EMC Directive 89/336/EEC : EN55022 Class B
: EN61000-3-2
: EN610000-3-3
: EN50082-1
IEC801-2
IEC801-3
IEC801 -4
1.2.12 Environmental Conditions
TEMPERATURE
o
Operating: o
Non-operating:
10 to 35
°
-20 to 60
°
C (with shipment container)
1 month at 40
°
C
120hours at 60
°
C
HUMIDITY
o o
Operating:
Non-operating:
20 to 80% RH
without condensation, Refer to Figure 1-7
5 to 85% RH without condensation, with shipment container
The environmental condition should be within the range shown in the figure below.
(%)
80
55
20
10 27 35
(”C) tmphumid
Figure 1-7. Environmental Condition
RESISTANCE TO SHOCK
o
Operating: 1 G, within 1ms (operating) o
Non-operating: 2G, within 2ms (with shipment container)
RESISTANCE TO VIBRATION
o
Operating: o
Non-operating:
0.15G
0.50G (with shipment container)
Revision B
Product Description Basic Specification 19
EPSON Stylus COLOR 480
C A U T I O N n
When non-operating, make sure the printhead is capped.
n
When transporting, make sure the printhead is capped and keep the ink cartridge mounted on the printer.
n
Under the power OFF condition, if the printhead is not capped, turn ON the printer after installing the ink cartridge, and turn off the printer after the capping has completed.
n
If the printer kept under -40 ° C, the ink inside the printhead and inside the ink cartridge will be frozen.
It takes 3 hours at 25 ° C to recover once frozen ink to be ready for use.
Revision B
Product Description Basic Specification 20
EPSON Stylus COLOR 480
1.3 Interface Specification
This printer has IEEE-1284 parallel interface and USB interface as standard.
1.3.1 IEEE-1284 Parallel I/F (Forward Channel)
Forward channel is the mode to transfer the ordinary printing command to the printer side from the PC side.
Table 1-5. Parallel I/F Specification (F-Channel)
Item Specification
Transmission mode
Synchronization
Handshaking
Signal Level
Adaptable connector
8bit parallel
By STROBE pulse supplied from the external
By BUSY and ACKNLG signal
TTL level (IEEE-1284-Level 1 device)
36 pin 57-30360 (amphenol) or equivalent
NOTE: I/F cable is recommended to be in minimum length.
The connector pin assignment is described below. For these signals described in the table, use the twist pair wire and connect the return side to the signal GND.
Table 1-6. Connector Pin Assignment and Signals (F-Channel)
Pin No.
Return
GND Pin
Signal
Name
From Function Description
1
2-9
10
19
20-27
28
-STROBE
Data1-8
PC
PC
-ACKNLG Printer
The strobe pulse for the printer to read data.
Pulse width requires min. 0.5
µ s (500ns).
High at normal condition. Receives data after shifting Low.
The DATA 1 through DATA8 signals represent data bits 1-8, respectively.
A low signal indicates the printer can accept data. Pulse width is 0.5 (default) or can be set at 2
µ s.
Revision B
Table 1-6. Connector Pin Assignment and Signals (F-Channel)
Pin No.
Return
GND Pin
Signal
Name
From Function Description
11
12
13
14
31
32
18
35
17
29
28
28
30
30
29
-
-
-
BUSY
PE
Printer
A high signal indicates that the printer cannot receive data. The signal becomes high under the condition below;
-Receiving data.
-Error.
-Other I/F receiving data.
Printer A high signal indicates paper-out error.
SLCT
-AFXT
-INIT
Printer
PC
PC
Always at high level. Pulled up to +5V via
1.0K
Ω resistor.
Not used.
The printer is initialized by the width of min.
50
µ s Low pulse input.
A low signal indicates printer error condition.
-ERROR PC
Logic H -Printer
+5V Printer
Always at high level. Pulled up to +5V via
3.9K
Ω
resistor.
Always at high level. Pulled up to +5V via
1.0K
Ω
resistor.
Chassis
GND
Printer chassis GND.
16, 33
19-30
15, 34
36
-
-
30
GND
NC
-SLIN -
-
Signal GND.
Not used.
Not used.
Product Description Interface Specification 21
EPSON Stylus COLOR 480
1.3.2 IEEE-1284 Parallel I/F (Reverse Channel)
Reverse channel is used to transfer the information data from the printer side to the PC side.
Item
Table 1-7. Parallel I/F Specification (R-Channel)
Specification
Transmission mode
Synchronization
Handshaking
Logic Level
IEEE-1284 nibble mode
Comply with the IEEE-1284 specification
Comply with the IEEE-1284 specification
TTL level (IEEE-1284-Level 1 device)
Data trans. timing Comply with the IEEE-1284 specification
Extensibility request data The printer responds affirmatively when the extensibility request values are 00H or 04H;
00H: Request Nibble Mode Reverse Channel Transfer.
04H: Request Device ID;
Return Data Using Nibble Mode Reverse Channel Transfer o
Device ID
The printer sends following device ID string when it is requested.
[00H] [5AH]
MFG: EPSON;
CMD: ESCPL2, BDC, D4;(*1)
MDL: Stylus[SP]COLOR[SP]480;
CLS: PRINTER;
DES: EPSON[SP]Stylus[SP]COLOR[SP]480;
(*1): When the D4 mode (IEEE1284.4) is OFF, printer reply as follows.
CMD: ESCPL2,BDC
NOTE: [00H] denotes a hexadecimal value of zero.
MDL value depends on the EEPROM setting. Refer to Appendix.
Revision B
The connector pin assignment is described in the table below. For these signals described in the table, use the twist pair wire and connect the return side to the signal
GND.
Table 1-8. Connector Pin Assignment and Signals (F-Channel)
Pin No.
Return
GND Pin
Signal Name From Function Description
1 19 HostClk
2-9
10
11
12
13
14
31
32
18
35
17
16, 33
19-30
15, 34
36
20-27
28
29
28
28
30
30
29
-
-
30
-
-
-
Data1-8
PtrClk
PtrBusy/
DataBit-3,7
AckDataReq/
DataBit-2,6
Xflag/DataBit-
1,5
HostBusy
-INIT
-DataAvail/
DataBit-0,4
Logic H
+5V
Chassis
GND
NC
1284-Active
PC
PC
Host clock signal.
The DATA 1 through DATA8 signals represent data bits 1-8 respectively.
Printer Printer clock signal.
Printer
Printer
Printer
Printer busy signal and reverse channel transfer data bit 3 or 7.
Acknowledge data request signal and reverse channel transfer data bit 2 or 6.
X-flag signal and reverse channel transfer data bit 1 or 5.
PC
PC
Host busy signal.
Not used.
Printer
Data available signal and reverse channel transfer data bit 0 or 4.
Printer Pulled up to +5V via 3.9K ohm resistor.
Printer Pulled up to +5V via 3.3 K ohm resistor.
Printer chassis GND.
-
-
PC
Signal GND
Not used.
1284 active signal.
Product Description Interface Specification 22
EPSON Stylus COLOR 480 Revision B
Following lists “Notes” when using the parallel interface.
o
“Return GND pin” in the table means twist pair return and is connected to the signal GND level.
For each signal, use the twist pair wire and connect the return side.
Also, these cables are shielded wires and it is effective means to connect to each chassis GND in the center machine and printer for electrostatic noise.
o
Refer to the timing chart for transmission timing of each signals.
o
Do not perform data transmission ignoring -ACK or BUSY signals. (Perform the data transmission after confirming that either -ACK or BUSY signal is Low) o
It is possible to perform the printing test including interface circuit without using external equipment when 8-bit data signal (2-9 pin) is set to appropriate character code (against GND, Open=”1”, Short=”0”) and connect then forcefully to -ACK and -STRB. However, to perform this, “I/F selection” of EEPROM must be set to
“Auto”. Also, IEEE-1284.4 packet mode must be set Off.
The figure below shows the timing chart of the parallel interface.
DATA
/STROBE
BUSY
/ACKNLG t setup
Data byte n t hold t stb t ready t busy t reply t ack
Figure 1-8. IEEE1284 Timing Chart
t nbusy t next
Data byte n+1 timechart
Table 1-9. IEEE1284 Timing Chart
Parameter Minimum Maximum tsetup thold tstb tready tbusy tt-out (*1) tt-in (*2) treply tack tnbusy tnext
0
---
---
0
500ns
500ns
500ns
0
500ns
0
0
---
120ns
200ns
---
--
---
---
---
10us
---
---
(1*): Rise and fall time of every output signals.
(*2): Rise and fall time of every input signals.
On the above timing chart, T ack
rated period is varies depend on the Parallel I/F data transmission speed below.
Table 1-10. t
act
Typical time of T
ack
Parallel I/F Mode Typical Time
High speed
Normal speed
2
µ s
4
µ s
Product Description Interface Specification 23
EPSON Stylus COLOR 480
1.3.3 EEE1284.4 Protocol
The packet protocol described by IEEE1284. 4 standard allows a device to carry on multiple exchanges or conversations which contain data and /or control command with another device at the same time across a single point-to-point link. The protocol is not, however. a device control language. It dose provide basic transport-level flow control and multiplexing services. The multiplexed logical channels are independent of each other and blocking of one has no effect on the others. The protocol operates over
IEEE1284.4.
Three function modes of IEEE1284.4 protocol, “On”, “Off” and “Auto” are available for Parallel I/F, and the setting is defined based on the data stored in the value in
EEPROM address 25<H>.
o
On
Communication in IEEE1284.4 packet mode is started by receiving a magic string
(1284.4 synchronous commands). Until a magic string is received, other commands are discarded. In this setting, the printer can not communicate with
DOS or Windows 3.X environment.
o
Off
Communication is carried out in the conventional mode. A magnetic string
(1284.4 synchronous commands) is discarded. And only IEEE1284 nibble protocol is available.
o
Auto
Communication is carried out in the conventional mode until a magic string
(1284.4 synchronous commands) is received. By receiving a magic string, communication in IEEE1284.4 packet mode is started. If the printer dose not receive a magic string, the printer communicates the PC by IEEE1284 nibble mode.
The factory setting for IEEE1284.4 mode is “ON”. But, after complete the initial ink charge operation, the setting of the EEPROM is set to “AUTO”. The change in this setting will be effective when the power is back on after the initial ink charge operation.
Product Description Interface Specification
Revision B
24
EPSON Stylus COLOR 480
1.3.4 Miscellanea
.
1.3.4.1 Receive Data Buffer Full Operation
Generally, hosts abandon data transfer to peripherals when a peripheral is in busy state for dozens of seconds continuously. In order to prevent the long busy status, printer start receive the data every 1 second when the reset of the input buffer become less than several hundreds of bytes.
The printer will be in busy state continuously when the input buffer finally gets full. This operation is not IEEE 1284.4 protocol
Revision B
1.3.5 Panel-less control & Status Indication
On this product, the control panel is not assembled in. So, Printer driver utility (STM39 allows to control the printer operation instead of the Control panel and indicates the printer status include the several errors.
1.3.5.1 Error Indication on Status Monitor 3
Following printer status is displayed in the STM3 (Status monitor 3).
o
Ink End/Low Error
When the printer is in the ink end or low condition, the STM3 displays the status.
If the “How to” button is clicked, the Ink Cartridge Replacement Utility runs and it reads the ink cartridge replacement procedure step by step.
Figure 1-9. Ink low error indication
Figure 1-10. Ink out error indication
Product Description Interface Specification 25
EPSON Stylus COLOR 480 o
Paper out Error
When the paper is not loaded correctly from the ASF to the PF roller, this error is displayed on the STM3.
Revision B o
Fatal Error
When the general error has occurred, this error is displayed on the STM3.
For example, circuit damage, motor damage...etc.
Figure 1-11. Paper out error indication
o
Paper jam error
When the paper is jammed between the PE sensor and the Paper eject roller, this error indication is displayed on the STM3.
Figure 1-13. Fatal Error indication
o
Maintenance Error
When the waste ink counter reaches to the specific counter value, this error is displayed on the STM3.
Figure 1-12. Paper jam error indication
Figure 1-14. Maintenance Error indication
Product Description Interface Specification 26
EPSON Stylus COLOR 480 o
Communication Error
When the printer can no t communicate with PC, this message is displayed on the
STM3.
Figure 1-15. Communication error indication
Revision B
1.3.5.2 Status Monitor 3 function o o o o
STM3 in the Printer driver utility allows to perform the following functions.
o
Nozzle Check Pattern printing
The printer prints the nozzle check pattern and the 6 digits code of the
firmware version & 6 digits code of the CPU Mask version.
Head cleaning
Bi-d adjustment patter printing
Print head alignment adjustment
Cancel the Paper out error
When the paper is not loaded correctly, STM3 (status monitor 3) display the
following message and the Paper Error can be canceled by clicking the
“Continue” button in the STM3.
“Paper is not loaded correctly. Reload the paper, then click the “Continue”
button. Click “Cancel” to stop any print jobs.” o
Cancel the Paper jam error
When the paper is jammed, STM3 display the following message and printer attempt to eject the Jammed paper by clicking the “EJECT” button.
“Paper is jammed”. Click the “Eject” button to eject any jammed paper.
If paper is still jammed inside the printer, click the “Stop” button, open the
printer cover and remove the paper. Then close the printer cover and click
the “Reset” button.
Moreover, if the “Stop” button is clicked, the printing is stopped and the
“Reset” button is displayed. If once the “Reset” button is clicked, the printer
setting is reset.
o
Ink Cartridge Exchange utility
According to the procedure displayed, I/C can be replaced. In this function,
CR moves to the I/C replacement position automatically and turn back to the
home position after setting the I/C in the CR unit. This function is always
available, not only Ink end or low condition.
o
Printer Setup utility
This utility instructs the printer set up procedure (I/C setting procedure) and
print the nozzle check patter and head cleaning. Additionally, printhead
alignment pattern is printed and allow the user to adjust the bi-d printing
alignment.
Product Description Interface Specification 27
EPSON Stylus COLOR 480
1.3.6 Initialization
The printer have 3 types of initialization. The initialization operations executed by each initialization method are described below.
HARDWARE INITIALIZATION
This printer initializes itself when it is turned power on or printer recognized the Reset command (D4 command). On this initialization, following actions are performed.
n
Initialize printer mechanism n
Clear the input data buffer n
Clear the print buffer n
Set default values
SOFTWARE INITIALIZATION
Initialization command, “ESC@” also initializes the printer.
On this initialization, following actions are performed.
n
Clear the print buffer n
Set default values
POWER ON INITIALIZATION EXCEPT I/F
This printer initializes itself when the printer receive the IEEE1284.4 reset command or the Parallel I/F cable is disconnected /connected.
On this initialization, following actions are performed.
n
Initialize printer mechanism n
Clears the input data buffer n
Clears the print buffer n
Sets default values except I/F setting.
Product Description Interface Specification
Revision B
28
EPSON Stylus COLOR 480
1.4 Physical Specification
DIMENSIONS
n
Stylus Color 480: 431 mm (W) x 311mm (D) x 271mm (H) (Printing)
(
311mm
271mm
431mm
Figure 1-16. Stylus Color 480 Dimensions
WEIGHT
n
Stylus Color 480: 3.0kg (without the ink cartridges)
Product Description Physical Specification
Revision B
29
EPSON Stylus COLOR 480
1.5 Consumables and Options
CONSUMABLE
The consumable for this printer are following;
Classification
Table 1-11. Consumables
No.
S020187
Name
Ink Cartridge (black)
Consumables
S020193 Ink Cartridge (color)
ENCLOSED PARTS
The following parts are enclosed in the Production.
Table 1-12. Enclosed parts
Enclosed Parts Quantity
User’s manual
Driver DISK
Black ink cartridge
Color Ink cartridge
Power Code
1 (paper + CD-ROM)
1(CD-ROM)\
1
1
1(220-240V version only) *1
NOTE: *1: On the 100-120V version product, the power cable is soldered on the
PS board directly.
Product Description Consumables and Options
Revision B
30
OPERATING PRINCIPLES
C H A P T E R
EPSON Stylus COLOR 480
2.1 Overview
This section describes the operating principles of the printer mechanism and electrical circuit boards. The Stylus COLOR 480 has only the following two circuit boards and dose not have control panel: o
Main board: C367MAIN-B (or C367MAIN) *1 o
Power supply board: C367 PSB/PSE
NOTE: *1): C367MAIN board is used for the product in the first mass
production and it will be changed to C367MAIN-B board at an early
date. The major difference is that C367MAIN-B has one chip CPU
which include the ASCI function. This section describes the operation
principle of C367MAIN-B.
2.1.1 Printer Mechanism
The printer mechanism for Stylus COLOR 480 is designed newly. But, the basic component of the printer mechanism is same as previous product.
This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism,
Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and
Carriage Lock Mechanism).
Like other EPSON ink jet printers, the Stylus COLOR 480 is equipped with two stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR mechanism. ASF unit uses rear entry front eject system. This ASF unit is also designed newly and single LD roller loads the paper to the printer mechanism.
For cap assembly, Stylus COLOR 480 uses valveless mechanism; new design for this model.
Paper Eject Roller
Star Wheel Roller
CR unit
Cap Assembly
PF Roller
CR Timing belt
Revision B
HP/PE/IC Sensor
LD Roller
Paper feed back plate
Paper separation pad
ASF Hopper Spring
CR lock lever
Pump Assembly
PF Motor
CR Motor
Clutch mechanism
Figure 2-1. Printer Mechanism block diagram
Operating Principles Overview 32
EPSON Stylus COLOR 480
2.1.2 Printhead
The printhead uses a new developed U-CHIPS head and Stylus COLOR 480 can perform multiple shot printing and variable printing. Printhead nozzle configuration is as follows.
n
48 nozzles x 1 row: Black (nozzle pitch of the row: 1/120 inch) n
45 nozzles x 1 row: Color (nozzle pitch of the row: 1/120 inch)
In the one row for the color, 15 nozzles are assigned for each yellow, magenta, cyan color)
The basic operating principles of the printhead, which plays a major role in printing, are the same as previous models; on-demand method which uses PZT (Piezo Electric
Element). In order to uniform the amount of ejecting ink, the printhead has its own head ID (6 digits for this printhead) which adjust PZT voltage drive features.
The printhead stores the head ID to EEPROM and generates appropriate PZT drive voltage to prevent amount of ink from varying by printheads.
Following explains printhead basic components.
o
PZT
PZT is an abbreviation of Piezo Electric Element. Certain amount of voltage expands and contracts PTZ. The drive wave generated on MAIN board drives PZT and PZT pushes the top cavity which has ink stored to discharge the ink from each nozzle on the nozzle plate.
o
Ink Cavity
The ink absorbed from the ink cartridge goes through the filter and then is stored temporarily in this tank called “cavity” until PZT is driven.
o
Nozzle Plate
The board with nozzle holes on the printhead surface is called Nozzle Plate.
o
Filter
When the ink cartridge is installed, if any dirt or dust around the cartridge needle is absorbed into the head, there is a great possibility of causing nozzle clog and disturbance of ink flow, and finally causing alignment failure and dot missing. To prevent this problem, a filter is set below the cartridge needle, where ink is filtered.
Ink Cartridge
Needle
Filter
PZT
Cavity
Nozzle Plate
Figure 2-2. Printhead Sectional Drawing
Revision B
Head Driver Board
Operating Principles Overview 33
EPSON Stylus COLOR 480
2.1.2.1 Printing Process
This section explains the process in which the printheads of On-Demand inkjet printers eject ink from each nozzle.
1.
Normal State:
When no printing signal is sent from PC, or no PZT drive voltage is applied, PZT does not change shape, therefore PZT does not squeeze the cavity. Ink pressure
inside the cavity is kept normal. (Refer to Figure 2-3.)
2) Ejecting State:
When the print signal is output from the C367MAIN-B board, IC (Nozzle
Selector) located on the printhead unit latches data once by 1-byte unit. An appropriate PZT latched by the nozzle selector is pushed into the cavity by the common voltage applied from the main board. By this operation, ink stored in the
cavity spurts out from nozzles.(Refer to Figure 2.1.2.2.)
Ink Path PZT Ink Cavity
Revision B
2.1.2.2 Printing Method
For print dot system, Stylus COLOR 480 has the following two kinds of printing modes.
n
Multiple shot printing n
Variable dot printing
The above two printing modes are automatically selected depending on the media and the resolution setting of the printer driver. The following explains each printing mode.
o
Multiple shot printing
This printing mode is developed to improve the print quality on plain paper or transparencies in low resolution. The multiple shot printing mode uses normal dot and the number of dot shots varies from 1 shot to maximum 4 shots depending on the print data to enable sharp image output even in a low resolution.
o
Variable dot printing
This printing mode is developed to improve the print quality on exclusive paper.
This mode is basically the same as variable dot printing mode used on other products /; micro dot, middle dot, and large dot compose this mode. Print dot size varies according to print data and this mode enables even sharper image output on exclusive paper.
Nozzle
Nozzle plate
PZT drive voltage
Figure 2-3. Printhead printing process
Operating Principles Overview 34
EPSON Stylus COLOR 480
2.1.3 Carriage Mechanism
The carriage mechanism consists of Carriage motor (CR motor), Carriage unit
(including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home &
I/C detector (HP/PE/IC sensor) etc. The carriage mechanism moves the carriage back and forth according to the drive from the carriage motor. The following stepping motor is mounted to drive CR mechanism. (See the table below.)
Items
Type
Drive Voltage
Coil Resistance
Inductance
Drive Method
Driver IC
Table 2-1. Carriage Motor Specification
Specifications
4-Phase/ 48-Pole PM Stepping motor
+42 V +/ - 5% (DRV IC voltage)
10.8
Ω
+/ - 10% (per phase at 25 degree)
15 mH +/ - 20%(1KH 1VmA)
Bi-Polar drive
LB1845
The drive from CR motor is transferred to the CR unit via CR timing belt. And the CR home position is detected with the HP/PE/IC sensor. This sensor is available as CR HP detector only in the HP (home position) detection sequence & pump operation sequence. (not available in the paper feeding sequence for the CR HP detector because it is used for only PE sensor during the paper feeding sequence.) Moreover, unlike the previous products, this printer dose not have the PG adjustment mechanism (1.7mm).
HP/PE/ICSensor CR Motor
CR home position is detected with the HP/PE/IC sensor and the detection plate molded in the CR unit as following figure. When the CR home position is detected with this sensor, HIGH signal is output to the CPU.
HP/IC detection Lever Right side view
CR HP detection plate
HP/IC detection Lever
CR HP detection plate
Low signal
Revision B
High signal
Figure 2-5. CR home position
Unlike the previous products, I/C detection sensor is not built in the CR unit.
The I/C is detected with the HP/PE/IC sensor and the detection plate molded on the I/C cover as following figure. The I/C installation condition is monitored only when the
CR unit moves to the I/C detection position (HP detection sequence). So, this sensor function is not available in the paper feeding sequence. When the I/C is not installed into the CR unit, HIGH signal is output to the CPU.
HP/IC detection Lever
Right side view
I/C detection plate
HP/IC detection Lever
I/C detection plate
High signal
Figure 2-6. I/C detection position (
Low signal
CR unit CR Guide shaft CR Timing belt
Figure 2-4. Carriage Mechanism (Top view)
Operating Principles Overview 35
EPSON Stylus COLOR 480
2.1.4 Paper Feeding Mechanism
The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller,
Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller.
For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this
product.
The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as
following Figure 2-7. Following shows you how to transfer the PF motor drive to the
PF roller and the Paper Eject Roller.
o
PF motor drive transmission path
PF Motor Pinion Gear (CW) →
Combination Gear 8.4, 21.6 (CCW)
→
Combination Gear
9.6, 33.6(CW)
→
Spur Gear 15 (PF roller)(CCW)
→
Spur Gear 34.2 (CW)
→ Spur gear 15
(CCW)
Item
Motor type
Drive voltage
Coil Resistance
Inductance
Driving method
Driver IC
Table 2-2.
PF Motor Specifications
Description
4-Phase/ 48-Pole PM Stepping motor
+42 V +/ - 5% (DRV IC voltage)
10
Ω
+/ - 10% (per phase)
10.5 mH +/ - 20%(1kH 1Vrms)
Bi-Polar drive
LB1845
Revision B
Top view
HP/PE/IC Sensor
Right side view
PF Motor
Star Wheel
Combination
Gear 12.6, 18.4
Paper Guide
Roller
Spur Gear 15
(PF Roller)
Spur Gear 34.2
Paper Feed Roller Paper Eject Roller
Spur Gear 35.2
Combination
Gear 22.4, 32
Non paper Feeding Paper
HP/PE/IC
Sensor
Change
Lever
Spur Gear 15
Spur Gear 15.2
Combination Gear 11.2, 32.4
PF Pinion Gear
Combination Gear 8.4, 21.6
Combination Gear 9.6,33.6
Figure 2-7. Paper Feeding Mechanism
PE Sensor Lever
Low signal High signal
Paper
Paper loaded from ASF is advanced by the following roller.
o
Paper feed roller & Paper guide roller (assembled on the Top Frame) →
Paper eject roller & Star wheel roller (assembled on the Paper eject frame).
Additionally, the top & end of the paper is detected with the HP/PE/IC sensor.
In case the PE sensor dose not detect the paper in the paper loading sequence, the printer detects the “Paper out error”. If the paper is detected after complete the paper eject sequence, the printer detects the “Paper jam error”.
Operating Principles Overview 36
EPSON Stylus COLOR 480
2.1.5 Paper Loading Mechanism (ASF Unit)
The Paper loading mechanism is positioned at the printer rear. The Paper loading mechanism loads paper at the ASF unit and feeds paper to the PF roller.
This ASF unit was designed newly for this product and consists of LD roller, Pad holder (Paper return plate), ASF Frame, Hopper, and so on.
For the major feature of this ASF unit, ASF HP sensor is not used and the single LD roller is built in the ASF unit.
Drive sent from the PF motor is always transmitted to the ASF unit side. But, the
Change lever and the Clutch mechanism switch ON/OFF the PF motor drive to the LD roller with the motor rotational direction.
Drive from the PF motor is transmitted to the ASF unit as described below: o
Switch the PF motor drive to ASF unit side
PF Motor pinion gear rotates CCW direction with a specific steps → Combination
Gear 8.4, 21.6 (CW) → Combination Gear 11.2, 32.4 (CCW) → Change Lever rotates (CCW) →
Release the Clutch mechanism lock position
Following Figure 2-8 shows you the switching path for PF motor drive to ASF unit
side.
Top View Right side view
Spur Gear 35.2
Combination
Gear 22.4, 32
Change Lever
Combination
Gear 8.4, 21.6
Combination
Gear 11.2, 32.4
PF pinion gear
Figure 2-8. Switch the PF motor drive to ASF unit side
Revision B o
Transfer the PF motor drive to LD roller
PF Motor pinion gear rotates CW direction → Combination Gear 8.4, 21.6 (CCW)
→ Combination Gear 11.2, 32.4 (CW) → Change Lever rotates (CW) →
Combination Gear 22.4, 32 (CCW) mechanism)
→
LD roller (CW).
→
Spur Gear 35.2(CW) (include the clutch
Following Figure 2-9 shows the PF motor drive transmission path to the LD roller unit built in the ASF unit. The LD roller is assembled on the same shaft that the Spur gear
35.2 is assembled.
Top View Right side view
Spur Gear 35.2
Combination
Gear 22.4, 32
Change Lever
Combination
Gear 8.4, 21.6
PF pinion gear
Figure 2-9. PF motor drive transmission path
Combination
Gear 11.2, 32.4
When the PF motor torque is switched to the ASF unit side by the clutch mechanism, the function of the ASF mechanism varies depending on the rotational direction of the
PF motor, as shown in the table below.
Table 2-3. ASF unit function & PF Motor rotational direction
Directions
Clockwise (*1)
Corresponding Functions
• Picks up and loads paper
Counterclockwise (*1)
• Release the DE lever & Clutch mechanism
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Operating Principles Overview 37
EPSON Stylus COLOR 480 o
Clutch Mechanism
Unlike the previous products, this product dose not have a ASF HP sensor.
Instead of the ASF HP sensor, Change lever and the Clutch mechanism are used to detect the ASF home position. Following figures describe the mechanism.
Step1
NOTE: Spur gear 35.2
Clutch gear
Change Lever
The Clutch gear is molded on the back side of the Spur gear
35.2 such as Combination gear.
Step2
Tension spring 0.143
Revision B
Step3
LD roller shaft
Clutch
Clutch lever
Figure 2-10. Disengage & Clutch mechanism
The Clutch mechanism transmits the PF motor drive to the LD roller shaft only when the Clutch gear rotates CW direction after the Change lever releases the Clutch lever. If the Clutch gear rotates CCW direction, the PF motor drive is not transmitted to the LD roller. This is due to the combination of the shape of the Clutch gear and the Clutch lock tooth such as described on the figure.
1.
When the paper is advanced with the PF roller, the Change lever is set on the Clutch lever and the Clutch is pushed down as above Step1’s figure. As the result, the Clutch gear (*1) is released from the Cluck lock tooth and the drive from the PF motor is not transmitted to the LD roller shaft.
2.
When the PF pinion gear rotates CCW direction in the above Step2’s figure, the
Change lever moves to the left direction with the CCW rotation of Combination gear
11.2, 32.4. The Clutch turns back to the engagement position by the tension force of the Tension spring 0.143 and the Clutch gear is engaged with the Clutch lock tooth as above Step2’s center figure.
3.
When the PF pinion gear rotates CW direction in the above Step3’s figure, the Change lever moves to the right direction with the CW rotation of the Combination gear 11.2,
32.4. And the drive from the PF motor is transmitted to the LD roller shaft via Clutch gear and Clutch lock tooth.
4.
The LD roller shaft rotates about 360 degree and the Change lever push the Clutch lever and the PF motor drive is interrupted. This position is the ASF home position.
Clutch lock tooth o
Paper Return Plate (Pad holder)
Unlike the previous products, The Paper return plate is built in the ASF frame instead of the Paper return lever. The Paper separation pad is also stacked on the plate.
It works with the spring force of the Torsion spring 28.9 (mounted in the ASF frame) as following figure.
LD roller Hopper
Paper Return
Plate
ASF frame Torsion spring 28.8
Compression spring 2.67
Figure 2-11. Paper Return Plate
The Paper return plate is set to return the paper to the paper stand-by position in the
ASF unit when the ASF unit is in the standby mode. When the paper is fed with the
LD roller, the Paper return plate is stored in the ASF frame by the LD roller.
Operating Principles Overview 38
EPSON Stylus COLOR 480 Revision B
Following figures show you the ASF paper loading sequence and the operation of the each mechanism.
Step 1
LD roller
Hopper
LD roller shaft
Paper return plate
When the paper is advanced with the PF roller, Change lever push down the Clutch lever as right figure and the Clutch lock tooth is disengaged from the Clutch gear.
As the result, the drive from the PF motor is interrupted and the LD roller dose not rotate.
This position is the ASF home position.
The Paper return plate is set to avoid that the paper is slipped down from the paper set position.
Change lever
Clutch lever
PF motor pinion gear CW rotation Step 3
Clutch gear
Clutch lock tooth
Clutch
The PF motor pinion gear rotates
CW direction and the drive from the
PF motor is transmitted to the ASF
LD roller shaft through the Clutch lock tooth and the Clutch gear.
The ASF hopper release lever rotates with the ASF LD roller and release the ASF Hopper. The ASF hopper is pushed with the Compression spring
2.67 and the paper is picked up with the ASF LD roller.
ASF Hopper release lever
LD roller shaft
Compression spring 2.67
PF motor pinion gear CCW rotation
ASF Frame
Step 2
Printer front side Tension spring 0.143
When the paper is loaded (pick up) from the ASF unit, the Change lever moves to the printer front side with the CCW rotation of the PF motor pinion gear and releases the Clutch lever. As the result, the Clutch turns back to the engagement position by the tension force of the
Tension spring 0.143.
And the Clutch lock tooth is engaged with the Clutch gear as right figure.
Step 4
Paper return plate
The ASF LD roller rotates CW direction moreover and the Paper return plate is stored under the ASF frame.
The paper is advanced up to the PF roller.
and the ASF LD roller & the clutch rotate to the “Step1” position. The Clutch lever is locked with the Change lever.
The drive from the PF motor is interrupted and the drive is transmitted to the PF roller side.
Operating Principles
PF motor pinion gear CW rotation
ASF hopper release lever
PF motor pinion gear CW rotation
Figure 2-12. ASF Paper Loading Sequence
Overview 39
EPSON Stylus COLOR 480
2.1.6 Ink System Mechanism
Ink system mechanism consists of pump unit (include the CR lock lever) and capping mechanism. Ink system mechanism drives the pump unit that presses cap to the printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad.
2.1.6.1 Pump Unit & Wiper mechanism
The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper
feeding mechanism and pump unit through the following gears. Refer to the Figure
PF Motor Pinion Gear (CW) →
Combination Gear 8.4, 21.6 (CCW)
→
Combination Gear
9.6, 33.6 (CW)
→
Spur Gear 15 (PF Roller Gear) (CCW)
→
Spur Gear 34.2 (CW)
→ Spur gear 15 (CCW) →
Combination Gear 12.6, 18.4 (CW)
→
Spur Gear 15.2 (CCW)
(
Pump unit)
The Pump unit and Wiper mechanism drives according to the PF motor rotational direction, as shown in the right table.
Revision B
Table 2-4. PF motor rotational direction & Ink System Mechanism
Directions Functions
Counterclockwise (*1)
Clockwise (*1)
• Sets the wiper.
• Absorbs ink by the pump unit
• Set the CR lock lever
• Resets the wiper.
(*1): The PF Motor rotational direction = seen from the right side of the printer.
Following figure shows the overview of the pump mechanism operation.
Figure 2-13. Pump mechanism
PF Motor
Combination
Gear 12.6, 18.4
Star Wheel
Spur Gear 15
(PF Roller)
Spur Gear 34.2
Paper Guide
Roller
Wiper
CR lock lever
Pump unit Cap unit
Spur Gear 15.2
(Pump unit)
Spur gear 15
Combination Gear 9.6, 33.6
Figure 2-14. PF motor drive transmission path to the Pump unit
PF Pinion Gear
Combination Gear 8.4, 21.6
Operating Principles Overview 40
EPSON Stylus COLOR 480
2.1.6.2 Capping Mechanism
The capping mechanism covers the printheads with the cap holder to prevent the nozzle from increasing viscosity when the printer is in stand-by mode or when the printer is off. This product has valveless cap system. Air valve function used for the previous models pumps and ejects ink only inside the cap by absorbing ink with the valve open.
By opening the Air valve, the negative pressure is decreased and only the ink inside the cap is ejected. (the ink is not absorbed from Ink cartridge or head cavity.)
But, valveless cap system, this operation is done out side of the capping area.
The CR moves to left side of the Cap assembly and the pump absorbs the ink inside the cap.
Printhead
Cap
Viewed from front side
CR unit
Slider cap
Waste Ink tube
Figure 2-15. Cap Mechanism
Slide up
Revision B
2.1.7 Ink Sequence o
Initial ink charge
After the product is purchased and the printer is turned on for the first time, the printer must be performed the initial ink charge and charges ink inside the head cavity. When the initial ink charge is completed properly, the printer releases the flag inside the EEPROM and no initial ink charge will be performed next time the power is turned on. Stylus COLOR 480 takes 110 seconds to complete the initial ink charge sequence and consume about half of the brand-new black ink cartridge.
o
Manual Cleaning
Unlike the previous models, the manual CL is available only though the utility included in the printer driver because this printer dose not have control panel.
Stylus COLOR 480 provides three types of manual cleaning to clean air bubbled or clogged ink with viscosity or foreign substances.
The following manual CL sequences can be executed by the utility included in the printer driver. n
CL1
- Ink absorption
Black Ink: 0.21ml, Color Ink: 0.21ml
-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.
-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.
n
CL1’
- Ink absorption
Black Ink:1.02ml, Color Ink: 1.02ml
-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.
-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.
Operating Principles Overview 41
EPSON Stylus COLOR 480 n
CL2
- Ink absorption
Black Ink: 0.51ml, Color Ink: 0.51ml
-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.
-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.
The above mentioned manual CL is executed by performing nozzle check pattern and manual CL alternately. The cleaning order is CL1 → CL1’ → CL2 → CL1.
Like the previous products, CL1 is selected automatically and performed in case any print check is not executed between each manual CL. Additionally, if the manual CL is performed with over 5 pages printing cycle, CL1 is always selected and performed.
Additionally, if either black or color I/C is ink low or end condition, any manual cleaning is prohibited and it is displayed on the STM3.
o
Timer Cleaning
Unlike the previous product, this printer dose not have Timer IC and Lithium battery which is used for the backup power source for Timer IC. So, this printer manages the printer off period or cleaning cycle by using the following method.
The printer driver sends the time command to the printer every D4 command transportation. The time command is generated based on the PC’s timer and it consists of year and month, date, hour, minutes, second. As soon as the printer receives the time command from the printer driver, it is compared with the latest cleaning time which is stored in the 6A<H>, 6B<H> address of the EEPROM. And if the timer cleaning period is over the specific period, the printer perform the timer cleaning automatically and store the time command in the 6A<H>,6B<H> address of the
EEPROM. In case the timer cleaning period is not over the specific period, the time command is not stored in the EEPROM and it is abandoned. Maximum 0.48ml of the ink is consumed in the Timer cleaning. (0.24ml of each black and color ink is consumed.)
Revision B o
Flashing
This printer performs the following two kinds of the Flashing for the following purpose.
n
Periodical Flashing
This is due to avoid the increment of both ink’s viscosity in the printhead nozzle during the continuous printing and the specific small amount of the ink is ejected in the cap based on the periodical flashing timer. n
Periodical large amount Flashing
This is due to avoid the increment of black ink’s viscosity in the printhead nozzle during the continuous printing and large amount of the ink is ejected in the cap based on the periodical large mount flashing timer.
Operating Principles Overview 42
EPSON Stylus COLOR 480
2.1.8 Printing mode
The print resolution and printing method are determined automatically by setting the media type and print quality (It is able to set by slider bar) in the printer driver as following table. Following table show you the detail setting in the “Auto” mode.
Table 2-5. Printing mode for Color mode
Print media
Plain paper
Slide bar
Speed
Default
Quality
Resolution
120 x 120
360 x 360
720 x 720
Print mode
Economy
Normal 360
Photo 720
High
Speed*1
ON
ON
ON
Micro weave
OFF
ON
ON
Dot size*2
ND-3dot
MSD2
VSD 6pl
360 dpi Ink jet paper
N/A 360 x 360 Normal 360 OFF ON MSD2
Photo Quality ink jet paper
Matte Paper-
Heavyweight
Photo paper
Default
Quality
Default
Quality
Default
Quality
360 x 720
720 x 720
360 x 720
720 x 720
360 x 720
720 x 720
Fine 360
Photo 720
Fine 360
Photo 720
Fine 360
Photo 720
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
MSD2
VSD 6pl
MSD2
VSD 6pl
MSD2
VSD 6pl
Photo Quality
Glossy Film
Ink Jet transparencies
N/A
N/A
720 x 720
360 x 360
Photo 720
Normal 360
OFF
OFF
ON
ON
VSD 6pl
MSD2
NOTE: *1: High speed means Bi-directional printing.
*2: ND means Normal dot. MS means Multi Shot Dot.
VSD means Variable Shot dot.
Revision B
Print media
Plain paper
Table 2-6. Printing mode for Black mode
Slide bar
Speed
Resolution
120 x 120
Print mode
Economy
High
Speed*1
ON
Micro weave
OFF
Default
Quality
480 x 240
360 x 720
Normal 240
Fine 360
ON
ON
ON
ON
Dot size*2
ND-3dot
MSD1
MSD2
360 dpi Ink jet paper
N/A 360 x 360 Normal 360 OFF
Photo Quality ink jet paper
Matte Paper-
Heavyweight
Photo paper
Default
Quality
Default
Quality
Default
Quality
360 x 720
720 x 720
360 x 720
720 x 720
360 x 720
720 x 720
Fine 360
Photo 720
Fine 360
Photo 720
Fine 360
Photo 720
Photo Quality
Glossy Film
Ink Jet transparencies
N/A
N/A
720 x 720
360 x 360
Photo 720
Normal 360
OFF
OFF
NOTE: *1: High speed means Bi-directional printing.
*2: ND means Normal dot. MS means Multi Shot Dot.
VSD means Variable Shot dot.
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
MSD2
VSD 6pl
MSD2
MSD2
VSD 6pl
MSD2
VSD 6pl
MSD2
VSD 6pl
Operating Principles Overview 43
EPSON Stylus COLOR 480
2.2 Electrical Circuit Operating Principles
The electric circuit of the Stylus COLOR 480 consists of the following boards.
o
Main board: o
Power supply board:
C367MAIN-B Board (C367MAIN Board*1)
C367 PSB/PSE Board
NOTE: C367MAIN board is used for the product in the first mass production and it will be changed to C367MAIN-B board at an early date.
The major difference is that C367MAIN-B has one chip CPU which include the ASCI function. This section describes the operation principle of C367MAIN-B
This section provides operating principles of C367MAIN-B Board and C367 PSB/PSE
Board. Refer to Figure 2-16 for the major connection of the each boards and their
roles.
C 3 6 7 M A I N - B B o a r d
P r i n t e r M e c h a n i s m
C R M o t o r
P F M o t o r
H e a d D r i v e r B o a r d
H P / P E / I C S e n s o r
+ 5 V D C
C 3 6 7 P S B / P S E
B o a r d
+ 4 2 V D C
Figure 2-16. Electric Circuit
Revision B
2.2.1 C367 PSB/PSE board
The power supply boards of Stylus COLOR 480 use a RCC (Ringing Chalk Converter) circuit, which generates +42VDC for drive line and +5VDC for logic line to drive the printer. The application of the output voltage is described below.
Voltage
+42VDC
+5VDC
Table 2-7. Application of the DC Voltages
Application
• Motors (CR Motor, PF Motor)
• Printhead common voltage
• Printhead nozzle selector 42V drive voltage
• C367MAIN control circuit logic
• Sensor
This printer dose not have the Power SW. So, the printer is turned on when the AC cable is connected to the AC inlet. If the AC cable is disconnected from the AC inlet, this power supply circuit supply 5 voltage for approximately 70us to keep the logic circuit.
AC voltage input from AC inlet first goes through filter circuit that removes high frequency components and is then converted to DC voltage via the rectifier circuit and the smoothing circuit. DC voltage is then lead to the switching circuit and FET Q1 preforms the switching operation. By the switching operation of the primary circuit,
+42VDC is generated and stabilized at the secondary circuit. This +42VDC generated by the secondary circuit is converted to +5VDC by the chopping regulator IC of the secondary circuit.
Operating Principles Electrical Circuit Operating Principles 44
EPSON Stylus COLOR 480 Revision B
+ 4 2 V D C o v e r c u r r e n t p r o t e c t i o n
+ 4 2 V D C + 5 V D C
Z D 5 3
+ 5 V D C L i n e
O v e r V o l t a g e
L i m i t a t i o n I C 5 1
+ 5 V R e g u l a t o r
F 5 1
Z D 5 2 , 8 7
+ 4 2 V D C L i n e
O v e r V o l t a g e
L i m i t a t i o n
R 9 2 , R 9 3 , Q 9 1 , Z D 5 1
+ 4 2 V D C L i n e
C o n s t a n t C o n t r o l
C 5 1
S m o o t h i n g
C i r c u i t
D 5 1
C 1 1
S m o o t h i n g
C i r c u i t
T R A N S ( T 1 )
Q 1
M a i n S w i t c h i n g
C i r c u i t
P C 1
P h o t o
C o u p l e r
Q 2 , Q 3
A b n o r m a l
F e e d b a c k c i r c u i t
F 1
O v e r C u r r e n t
P r o t e c t i o n
L 1
F i l t e r C i r c i u t
F u l l W a v e
R e c t i f i e r c i r c u i t
D B 1
A C I n p u t
Figure 2-17. C301PSB/PSE Board Block Diagram
The C367 PSB/PSE board has the various control circuits to stop voltage output if a malfunction occurs on the power supply board or the main board while the printer mechanism is on duty. Following explains each control and protection circuit.
o
+42V line constant voltage control circuit:
The output level of +42V line is monitored by a R92, R93,Q91,ZD51.
When + 42V line reaches about 42.5V, ZD51 has a continuity with and PC1 start the operation via Q91. Consequently, Q1 switching operation is controlled by this circuit to stabilize the 42V line.
o
+42Vline over voltage protection circuit:
The output voltage line is monitored by ZD52,ZD87. If the output level of the voltage level of +42DC line exceeds +48V, this circuit stops the operation of the switching FET Q1 via PC1,Q82,Q83 and prevents high voltage from applied to the secondary side o
+42Vline over current protection circuit:
The output voltage is monitored by the F51. When the abnormal current is detected by F51, F51 is fused and cut off the +42V line output to the Main board o
+5V line constant voltage control circuit/+5V line over current protection circuit:
The output level of the +5VDC line voltage is monitored by the regulator IC51. If abnormal voltage is detected, the information is fed back to the internal comparator.
o
+5V line over voltage protection circuit:
The output voltage level of the +5V line is monitored by ZD53.
If the output level of the voltage level of +5DC line exceeds +7V, this circuit stops the operation of the switching FET via PC1,Q82,Q83and prevents high voltage from applied to the secondary side.
Operating Principles Electrical Circuit Operating Principles 45
EPSON Stylus COLOR 480
2.2.2 C367MAIN-B Board
The printer mechanism is controlled by C367MAIN-B. On this MAIN board, 3.3V regulator IC is not mounted and all IC is driven with 5.0 V.
See Figure for the C367MAIN-B board block diagram.
P - R O M 4 M
( I C 3 )
A d d r e s s
D a t a
D - R A M 1 M
( I C 4 )
C R 2
E 0 1 A 1 4 N A
C P U ( I C 1 )
R e s e t I C
( I C 6 )
E E P R O M
( I C 5 )
M o t o r D r i v e r
( I C 8 )
M o t o r D r i v e r
( I C 9 )
C o m m o n D r i v e r
( I C 7 )
P a r a l l e l I / F I C
( I C 1 0 )
Q 1 & Q 2
C N 1
C N 2
H P / P E / I C S e n
C R M o t o r
C N 3
C N 4
C N 6 P a r a l l e l I / F
P F M o t o r
H e a d
Figure 2-18. Block Diagram for the C367MAIN-B Board
Following shows you the major characteristic of this main board.
o
Timer IC & Lithium battery are not mounted
Unlike the previous products, the Timer IC and the Lithium battery are not mounted on the Main board. So, this product perform the Power-on cleaning or
Timer cleaning based on the time command which is sent from the printer driver.
As for the detail, refer to the 2.1.7 Ink Sequence.
o
D-RAM
1Mbit D-RAM is mounted on the Main board.
o
One CPU controls the all function on the main board.
Revision B
2.2.2.1 Main elements
Table 2-8 shows the function of the each main elements on C367MAIN-B.
IC
CPU
E01A14NA
PROM
RAM
AT93C46
LA5623M
E09A17RA
LB1845
LB1845
74LS07
Location
Table 2-8. Main Elements
Function
IC1
IC3
IC4
IC5
IC6
IC7
IC8
IC9
IC10
16bit CPU mounted on the MAIN board is driven by clock frequency 24MHz and controls the printer.
• Capacity 4MB, Bus= 16 bit
• Program for CPU
Bus= 16 bit, 1Mbit DRAM
1kbit EEPROM
• Default value setting
• Parameter backup
Reset IC
• For +5V; reset when +4.2V is detected
• For +42V, reset when +33.2 is detected
Head drive control HIC
• Generates head common voltage.
CR motor drive IC
PF motor drive IC
IEEE1284 parallel I/F transceiver IC.
Operating Principles Electrical Circuit Operating Principles 46
EPSON Stylus COLOR 480
2.2.2.2 Printhead Driver Circuit
The printhead drive circuit consists of the following two components: n
Head common driver circuit
(Common driver IC7 & Wave amplifier transistor Q1, Q2) n
Nozzle selector IC on the printhead driver board.
The common driver (IC7) generates a reference drive waveform according to the output signals from the CPU (IC1). The reference drive waveform is amplified by the transistors Q1 and Q2 and then transferred to the nozzle selector IC on the printhead circuit board. Print data is converted to serial data by the CPU and then sent to the nozzle selector IC on the printhead circuit board. Based on the serial data, the nozzle selector IC determines the nozzles to be actuated. The selected nozzles are driven by
the drive waveforms generated by the common driver. See Figure 2-19 for the
printhead driver circuit block diagram.
+ 4 2 V + 5 V
1 3
V D D
F 1
H W A 0
H W A 1
H W A 2
H W A 3
I C 1
E 0 1 A 1 4 N A
4 7
4 6
4 5
4 3
2 8
2 7
2 6
2 5
H W C L K 1
H W C L K 2
H W F L R
H W R S T
H W S D A T A
H W S C L K
H W S L A T
H W L A T
H S 0 1
H S 0 2
H C L K
H N C H G
H C H
H S P
A N 0
2 4
2 9
2 2
2 7
2 6
3 0
2 8
4 1
2 5
4 8
4 9
3 8
3 7
4 0
3 9
1
2 9
3 0
6
5
4
3
A 2
A 3
A O
A 1
C L K 1
C L K 2
F L O O R
R S T
D A T A
D C L K
V C C 4 5
V C C 4 5 _ 2
N P N B
F B
I C 7
C o m m o m
D r i v e r I C
P N P B
2 2
1 8
1 6
2 3
2 0
1 6
V H V
1 5
C O M
1 4
G N D 2
G N D
G N D
G N D
G N D
C N 4 N o z z l e S e l e c o r I C
I R 2 C 9 6 F
1 2
1 0
1 1
L A T
S I 1
S I 2
S C K
N C H G
C H
S P
T H M
H e a d D r i v e
P u l s e
Figure 2-19. Printhead Driver Circuit
Revision B o
Head common driver circuit
The reference head drive waveform is generated in the common driver (IC7) based on the following 11 signal lines output from the CPU (IC1); A0-A3, CLK1, CLK2,
FLOOR, RST, DATA, DCLK, and E.
Based on the DATA signal output from the CPU (IC1), the original data for the head drive waveform is written in the memory in the common driver (IC7).
The addresses for the written data are determined by the A0 - A3 signals, and, of among, data used to determine the waveform angles is selected and appropriate head driver waveform is generated. Generated head drive waveform is transferred to nozzle selector IC on the head driver board and applied to the nozzle PZT specified by nozzle selector IC.
o
Head nozzle selector circuit
Printing data are allocated to the two rows, the number of the head nozzle rows, and converted into serial data by the CPU (IC1). Then the converted data is transferred to the nozzle selector IC through the two signal lines (SI0 to SI2).
Data transmission from the CPU to the nozzle selector synchronizes with the SCK clock signal and the LAT signal. Referring to the transferred data, nozzles to be activated are selected, and the PZTs of the selected nozzles are driven by the drive waveform output from the head common driver.
Operating Principles Electrical Circuit Operating Principles 47
EPSON Stylus COLOR 480
2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit
The motor driver IC (IC9) on the MAIN board drives PF motor. This product uses 4phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive.
CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form and outputs to motor driver IC (IC9) LB1845 from port 12, 17. Based on this signal,
IC9 determines the phase mode.
The current value on each phase is determined by CPU (IC1) and outputs from port 13,
14, 15, 16, to driver IC (IC9). Motor driver IC generates motor driver waveform based on these input signals and controls the motor. If the printer dose not receive any data from PC for 5 minutes, CPU set the motor drive current to 0 via port 13, 14,15,16 and the motor drive is turned off to save the power consumption.
Revision B
2.2.2.4 CR Motor Driver Circuit
The motor driver IC (IC8) on the MAIN board drives PF motor. This product uses 4phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive.
CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form and outputs to motor driver IC (IC8) LB1845 from port 139, 144. Based on this signal,
IC8 determines the phase mode.
The current value on each phase is determined by CPU (IC1) and outputs from port
140, 141, 142, 143, to driver IC (IC8). Motor driver IC generates motor driver waveform based on these input signals and controls the motor. If the printer dose not receive any data from PC for 5 minutes, CPU set the motor drive current to 0 via port
140, 141,142,143 and the motor drive is turned off to save the power consumption.
E 0 1 A 1 4 N A
( I C 1 )
P F I A 2
P F I A 3
P F I B 2
P F I B 3
1 4
1 3
1 5
1 6
P F P H A A
P F P H A B
P F V 2
7
1 2
1 7
2 5
1 8
2 4
1 9
2 1
2 0
2 2
2 3
I 0 1
L B 1 8 4 5
( I C 9 )
I 1 1
I 0 2
I 1 2
E N A B L E 1
O U T 1 A
E N A B L E 2
P H 1
O U T 1 B
P H 2
3
1 3
2 7
1 6
2 6
1 7
1 2
V R E F 1
V R E F 2
R C 1
R C 2
S E N 1
E 1
S E N 2
E 2
O U T 2 A
O U T 2 B
C N 3
A /
B /
R o t o r
E 0 1 A 1 4 N A
( I C 1 )
C R I A 2
C R I A 3
C R I B 2
C R I B 3
1 4 2
1 4 3
1 4 1
1 4 0
C R P H A A
C R P H A B
M T V 2
1 3 9
1 4 4
3
2 4
1 9
2 1
2 0
2 5
1 8
2 2
2 3
I 0 1
L B 1 8 4 5
( I C 8 )
I 1 1
I 0 2
I 1 2
E N A B L E 1
O U T 1 A
E N A B L E 2
P H 1
O U T 1 B
P H 2
2 7
1 6
2 6
1 7
1 3
1 2
3
V R E F 1
V R E F 2
R C 1
R C 2
S E N 1
E 1
S E N 2
E 2
O U T 2 A
O U T 2 B
C N 2
A /
B /
R o t o r
Figure 2-20. PF Motor Driver Circuit Block Diagram Figure 2-21. CR Motor Driver Circuit Block Diagram
Operating Principles Electrical Circuit Operating Principles 48
EPSON Stylus COLOR 480
2.2.2.5 Reset Circuit
Reset circuits consist of the rest IC (IC6). Reset circuits are mounted on the MAIN board to monitor the two voltages: +5V for the logic line and +42V for the drive line.
When each circuit detects abnormality on the corresponding line, it outputs a reset signal to reset CPU (IC1). This function is necessary to prevent the printer from operating abnormally. This IC monitors both +5V and +45 lines but can reset them independently. The reset circuits outputs reset signal when +5V line becomes 4.2V or lower or +42V line becomes 33.2V or lower.
Unlike the previous products, the timer IC is not built in the reset IC and the Lithium battery also is not equipped on the main board.
.
Revision B
2.2.2.6 EEPROM Control Circuit
Since EEPROM is nonvolatile memory, it keeps written information if the printer power is turned off. When the printer is turned ON, CPU (IC1) reads data from
EEPROM (IC5) and when the power is turned OFF it stores data to EEPROM.
Information stored in EEPROM is listed below.
n
Various ink counter (I/C consumption counter, waste pad counter, etc.) n
Mechanical setting value (Head ID, Bi-D adjustment, USB ID, etc.)
See Table 7-7, “EEPROM Address Map,” on page 131 that provides detailed
information on the values stored in EEPROM.
+ 4 2 V
N C 1
I N
N C 2
G N D
I C 6
L A 5 6 2 3 M - T E - L
M R E S
V C C
O U T 1
O U T 2
+ 5 V
1 2 8
P 8 5
I C 1
E 0 1 A 1 4 N A
1 2 9
1 3 0
N M I
X R E S E T
+ 5 V
V C C
N C
O R G
G N D
A T 9 3 C 4 6
( I C 5 )
C S
S K
D O
D I
E 0 1 A 1 4 N A
( I C 1 )
1 3 5
1 3 4
1 3 3
1 3 2
E C S
E C K
E D I
E D O
Figure 2-22. Reset Circuit Block Diagram
Main signal lines are explained below; n
OUT1: n
OUT2: n
IN: n
VCC:
Interrupt signal
Reset line
+42V line monitoring line
+5V line monitoring line
Figure 2-23. EEPROM Circuit Diagram
EEPROM is connected to CPU with 4 lines and each line has the following function. n
CS: Chip selection signal n
CK: Data synchronism clock pulse n
DI: Data writing line (serial data) at power off.
n
DO: Data reading line (serial data) at power on.
Operating Principles Electrical Circuit Operating Principles 49
EPSON Stylus COLOR 480
2.2.2.7 Sensor Circuit
C367MAIN-B is equipped with the following two sensors to detect the status of the printer. Unlike the previous product, ASF HP sensor is not equipped on the ASF and
the ASF HP is determined with the clutch mechanism (2.1.4 Paper Feeding
o
HP/PE/IC Sensor
This sensor uses photo interrupter method and detects the following three status.
The photo interrupt component and two detection levers consists of this sensor.
n
CR home position
The CR home position is detected on the right edge of the CR shaft with the HP/
PE/IC sensor during the power on sequence. In case the CR home position is detected in the power on sequence, this sensor outputs HIGH signal to the CPU.
When the LOW signal is output to the CPU in the detection position, the CR unit is out of home position.
n
.Ink cartridge installation condition.
When the printer is powered on, the CR unit moves to the left side with the specific steps. And in case the plate molded on the Ink cartridge cover push the sensor detection lever, the sensor detects that the ink cartridge is not installed in the CR unit and outputs HIGH signal.
When the ink cartridge is installed in the CR unit, the plate molded on the ink cartridge cover dose not contacts with the sensor detection lever and the LOW signal is outputs to the CPU. The Ink cartridge installation condition is monitored in the ink cartridge replacement sequence also.
n
Paper Top & End position
When the Paper is in the paper path, this sensor outputs the HIGH signal.
When the Paper is not in the paper path, this sensor outputs the LOW signal.
This status is always monitored during the printer is in the power on status with this sensor. o
Thermistor (THM)
The thermistor is attached directly on the printhead driver board. It monitors the temperature around the printhead and determines the proper head drive voltage according to the ink viscosity that varies by the temperature. This information is fed back to the CPU analog port. When the temperature rises, the head drive circuit lowers the drive voltage: When the temperature lowers, the head drive circuit rises the drive voltage.
Revision B
:
The block diagram for the sensor circuit is shown below
I C 1
E 0 1 A 1 4 N A
+ 5 V
S W H P P E
3 2
+ 5 V
+ 5 V G N D
2
H P P E
1
C N 1
H P / P E / I C S e n s o r
A N 0
2 2
G N D
T H M
Figure 2-24. Sensor Circuit Diagram
Operating Principles Electrical Circuit Operating Principles 50
TROUBLESHOOTING
C H A P T E R
EPSON Stylus COLOR 480
3.1 Overview
This chapter describes how to identify troubles in two levels: unit level repair and component level repair. Refer to the flowchart in this chapter to identify the defective unit and perform component level repair if necessary. This chapter also explains motor coil resistance, sensor specification and error indication.
START
Unit level Troubleshooting
Unit repair
Assemble & Adjustment
END
Figure 3-1. Troubleshooting Flowchart
Revision B
Motor
CR Motor
PF Motor
Table 3-1. Motor, Coil Resistance
Location Check Point
CN2
Pin 1 and 3
Pin 2 and 4
Resistance
10.8 Ohms
±
10%
(at 25
°
C/ phase)
CN3
Pin 1 and 3
Pin 2 and 4
10 Ohms
±
10%
(at 25
°
C/ phase)
Sensor Name
HP/PE/IC Sensor
Thermistor
(THM)
Table 3-2. Sensor Check Point
Check Point Signal Level
CN1/Pin 1 and 2
Less than 0.7V
More than 2.4V
Switch Mode
Off
• Out of HP range
• No paper
• Detect the I/C
On
• Within HP range
• Detect the paper
• Not detects the I/C
TH1 (on the Head driver board)
Analog signal 10 K (at 24
°
C)
Troubleshooting Overview 52
EPSON Stylus COLOR 480
Condition
• No Paper
• Paper is not loaded correctly
Table 3-3. Error Indication
Status Monitor 3 Indication
Figure 3-2. Paper is not loaded correctly
Generic
Remedy
1) Reload the paper, then click the
“Continue” button.
2) If you want cancel the print job, click the
“Cancel” button.
• Paper Jam
Figure 3-3. Paper Jam
1) Click the
“Eject” button to eject any jammed paper.
2) If the paper is still jammed inside the printer, click the “Stop” button to cancel the print job. Then, open the printer cover and remove the jammed paper.
Condition
• Ink Out
• Ink Low
Table 3-4. Error indication
Status Monitor 3 Indication
Figure 3-4. Ink out
Figure 3-5. Ink low
NOTE: If this error is indicated on the monitor, you can continue the printing until the I/C becomes ink out condition. However, the head cleaning operation can not be done so that the remaining ink is
low condition. Refer to Figure 3-6
on the next page.
Revision B
Generic
Remedy
1) Click the
“How to” button and replace the I/C by following the procedure.
1) Click the
“How to” button and replace the I/C by following the procedure.
Troubleshooting Overview 53
EPSON Stylus COLOR 480
Condition
• Head cleaning can not be completed.
Table 3-5. Error indication
Status Monitor 3 Indication
Generic
Remedy
Click “Yes” button and replace the
I/C by following the procedure.
• Head alignment
(bi-d) was not performed.
Figure 3-6. Head cleaning caution
Figure 3-7. Print head alignment was not performed
NOTE: This error message is indicated only this adjustment was not performed in the Set up utility.
Once, this adjustment is performed, this indication is not indicated again.
Use the Print head alignment utility on the printer driver utility menu to align the print head.
Revision B
Condition
• Communication
Error
• General Error
Table 3-6. Error indication
Status Monitor 3 Indication
Figure 3-8. Communication error
Generic
Remedy
1) Check the correct printer driver is selected in the printer setting.
2) Check the parallel I/F cable is connected correctly.
3) Disconnect the AC cable and connect it again.
Motors or circuit boards may be broken.
Find out the failure parts by referring to the
“Unit level troubleshootin g”.
Figure 3-9. General error
Troubleshooting Overview 54
EPSON Stylus COLOR 480
Table 3-7. Error Indication
Status Monitor 3 Indication Condition
• Waste Ink pad overflow Error.
Figure 3-10. Waste Ink Error
Generic
Remedy
Replace the
Waste drain ink pad with new one and reset the Waste drain ink pad counter
(Protection counter A) by using the
Service
Adjustment program.
Troubleshooting Overview
Revision B
55
EPSON Stylus COLOR 480
3.2 Unit Level Troubleshooting
You can identify the troubles, using the checklist in this section and then find defective parts. When you find out defective parts, replace them by referring the Chapter 4
“Disassembling.”
In your repair activity, connect the printer to your PC and check the Status monitor 3 by identify the trouble because this printer dose not have control panel. Based on the
Status monitor 3 indication or phenomenon, check the printer more detail by referring the corresponding check table.
Table 3-8. Symptoms and possible cause
Paper jam error indication on STM3
Multiple papers are always loaded.
Symptom
Paper out error indication on
STM3 (Paper is not loaded correctly)
Possible Cause
• The friction of the LD roller is lowered due to the paper dust.
• The clutch mechanism is broken.
• Tension spring 0.143 come off in the clutch mechanism.
• Compression spring 0.98 comes off.
• Tip of Change lever has any damage.
• PF motor is broken
• Star wheel assembly is not assembled on the Paper eject frame.
• The Spur gear 15 is not assembled correctly
• The paper guide front is not assembled correctly or has any damage.
• The PE detection lever dose not move smoothly
• The paper return plate dose not work correctly.
Check table
Paper is always loaded without any print job
• The Change lever is broken in the Clutch mechanism.
Revision B
Table 3-8. Symptoms and possible cause (continued)
General error indication on the STM3
Symptom
Communication error on the
STM3
Any error indication is not displayed. But, the paper is not ejected completely.
Paper jam dose not occur.
Dot missing occur and it is not recovered with CL
Print quality is not good
• Vertical banding
• Horizontal banding
• Printing is blurred
• Ink stains the paper
Possible Cause Check table
• HP/IC sensor lever or PE sensor lever dose not move smoothly.
• HP/PE/IC sensor is defective.
• CR motor is defective.
• PF motor is defective
• Main board is defective.
• Printer Housing dose not secured with screw on -the printer mechanism
• The main board is defective
• The power supply board is defective.
• The parallel cable dose not support the bidirectional transportation.
• The suitable print driver is not installed into the PC.
• Paper eject roller gear is disengaged from the pump’s gears.
• The Paper eject frame is not assembled in the Paper eject frame.
• Pump unit dose not absorb the ink from the printhead.
• Cap unit dose not stick on the surface of the printhead completely.
• The printhead is broken
• The head FFC has any damage.
• The main board is defective.
• The accuracy of the CR motor is lowered.
• The lack of the lubricant around the CR unit.
• The both I/C is not held in the CR unit securely.
• The Paper eject frame is deformed.
• Any foreign material is sticking around the printhead.
• Paper feed accuracy is lowered.
• Printer driver setting is not suitable.
• Paper path has ink stain somewhere.
Troubleshooting Unit Level Troubleshooting 56
EPSON Stylus COLOR 480
If the problem fits to the detail phenomenon in the table, make sure the check point and repair the product following the corresponding remedy mentioned in the table when you find the defective parts in the check point.
Table 3-9. Paper out error indication on STM3
Paper out error indication on STM3
Step
No.
Detail phenomenon Check point Remedy
1
ASF LD roller attempt to load the paper.
But, paper is not loaded at all. The LD roller seems slipping.
• Check the surface of the LD roller if the micro pearl or severe smear is adhered.
LD roller
If it is no problem, proceed the next step
• Set a cleaning sheet in the ASF up side down.
Then holding the top edge, try to load the paper from the Printer driver. The micro pearl on the LD roller surface is removed. To remove severe smear, staple a cloth moistened with alcohol to a post card and clean the roller in the same manner.
( U s e a p o s t c a r d f o r t h e b a s e s h e e t . ) N o n - a d h e s i v e A r e a
C L S h e e t
A d h e s i v e A r e a
T h i s s i d e d o w n
S t a p l e r s
C l o t h m o i s t e n e d w i t h a l c o h o l
• If the problem is not solved, replace the LD roller with new one.
Revision B
Table 3-10. Paper out error indication on STM3
Paper out error indication on STM3
Step
No.
Detail phenomenon Check point
ASF LD roller dose not attempt to load the paper. But, the PF motor and the Spur gear 35.2 is rotating.
• Check if the clutch tooth is broken.
Clutch tooth
Remedy
• Replace the clutch mechanism with new one.
2
Spur gear 35.2
3
ASF LD roller dose not attempt to load the paper. But, the PF motor and the Spur gear 35.2 is rotating.
If it is no problem, proceed the next step.
1. Check if the tension spring 0.143 comes off in the Clutch mechanism.
1. Se the tension spring
0.143 in the clutch mechanism.
Tension spring
0.143
2. Set the Compression spring 0.98 in the
Change lever.
Troubleshooting Unit Level Troubleshooting 57
EPSON Stylus COLOR 480
Table 3-11. Paper out error indication on STM3
Paper out error indication on STM3
Step
No.
Detail phenomenon Check point Remedy
1. Check if the tip of the
Change lever has any damage.
1. Replace the Change lever with new one.
4
Change lever
When the print data is sent to the printer, ASF
LD roller continue to load the paper even if the first paper is loaded to the PF roller and the paper is ejected while the ASF hopper is flapping. comp. spring 0.98
2. Check if the
Compression spring
0.98 comes off from the Change lever
2. Set the Compression spring 0.98 in the
Change lever.
5
When the printer is turned on, ASF hopper dose not operate at all in the power on sequence
If it is no problem, proceed the next step.
1. Check if the PF motor connector is connected to the CN3.
2. Check if the PF motor coil resistance is about
7ohm by using tester
1. Connect the PF motor connector to the CN3 on the Main board.
2. Replace the PF motor with new one.
3. If the problem is not solved, replace the Main board with new one.
Revision B
Table 3-12. Paper jam error indication on STM3
Paper Jam error indication on STM3
Step
No.
Detail phenomenon Check point Remedy
1
Paper is not ejected completely and jammed around the
Paper eject frame.
• Check if the star wheel assembly is assembled in the Paper eject frame.
Star wheel assy
• Remove the jammed paper and assemble the
Star wheel assembly in the Paper eject frame completely.
If the hook portion of the
Star wheel assembly is broken, replace the Star wheel assembly with new one.
If it is no problem, proceed the next step
• Check if the Paper eject roller is rotating correctly.
• Set the tip of the Spur gear 15 to the protrusion of the Pump unit and assemble it correctly.
Paper eject roller
2 Ditto
Spur gear 15
If it is no problem, proceed the next step
Troubleshooting Unit Level Troubleshooting 58
EPSON Stylus COLOR 480
Table 3-13. Paper jam error indication on STM3
Paper Jam error indication on STM3
Step
No.
Detail phenomenon
3
Check point
The paper is jammed around the Front paper guide.
1. Check if the Front paper guide is floating from the assemble position.
2. Check if there is any damage around the rear edge of the each rib on the Front paper guide.
Remedy
1. Assemble the Front paper guide front to the suitable portion and confirm the PF grounding spring is securing the
Front paper guide.
PF grounding spring
4
Front paper guide
Front Paper guide
2. Replace the Front paper guide with new one.
Paper is loaded correctly from ASF.
But, after complete the print job, paper jam indicated on the screen without any paper jam.
If you send the new print job in this condition, the General error is indicated on the screen.,
If it is no problem, proceed the next step
• Check if the Torsion spring 0.22 comes off on the both PE sensor lever.
PE sensor lever
Tension spring
0.22
• If the Torsion spring
0.22 is not set on the correct position, set it correctly. If any paper dust is placed around the
PE sensor lever, remove it
• If it is no problem, proceed the next step
Revision B
Table 3-14. Paper jam error indication on STM3
Paper Jam error indication on STM3
Step
No.
Detail phenomenon
5
When the paper is loaded from the ASF and ejected without any printing. After eject the paper, paper eject sequence is continued.
If any print job is sent to the printer,
General error is displayed on the
STM.
Check point Remedy
1. Check if the CN1 connector cable for HP/
PE/IC sensor cable is disconnected on the
Main board or sensor.
2. Check if the HP/PE/IC sensor operates correctly by using the
1. Connect the CN1 connector cable to the
CN1 on the Main board.
2. Replace the HP/PE/IC sensor with new one.
3. If the problem is not solved, replace the Main board with new one.
Troubleshooting Unit Level Troubleshooting 59
EPSON Stylus COLOR 480
Table 3-15. Multiple papers are always loaded
Multiple papers are always loaded.
Step
No.
Detail phenomenon
1
Check point Remedy
Any error indication is not displayed on the monitor. But, multiple papers are always loaded from ASF.
Check if the Paper return plate is operating correctly in the ASF when the paper is loaded.
• Assemble the torsion spring 28.9 in the ASF frame.
Torsion spring 28.9
Revision B
.
Table 3-16. Paper is always loaded without any print job
Paper is always loaded without any print job
Step
No.
Detail phenomenon Check point
Paper is always loaded from ASF without any print job.
ASF hopper continue to flapping when the printer is turned on.
1. Check if the tip of the
Change lever has any damage.
Change lever
1
Remedy
1. .Replace the Change lever with new one.
comp. spring 0.98
2. Check if the
Compression spring
0.98 comes off from the Change lever
2. Set the Compression spring 0.98 in the
Change lever.
Troubleshooting Unit Level Troubleshooting 60
EPSON Stylus COLOR 480
Table 3-17. General Error indication on the STM3
General Error indication on the STM3
Step
No.
Detail phenomenon Check point Remedy
1. Check if the Torsion spring 0.22 comes off on the both HP/IC sensor lever.
HP/IC sensor lever
1. Set the Torsion spring
0.22 on the HP/IC sensor lever.
1
When the printer is turned on, the printer continue the paper eject sequence even if the paper is not in the paper path.
Torsion spring
0.22
2. Check if the Torsion spring 0.22 comes off on the both PE sensor lever.
Tension spring
0.22
2. Set the Torsion spring
0.22 on the PE sensor lever.
Troubleshooting
PE sensor lever
3. Check if the CN1 connector cable is connected on the CN1 on the Main board or sensor.
4. Check if the HP/PE sensor work correctly by using the tester.
3. Connect the CN1 connector cable to the
CN1 on the Main board.
4. Replace the HP/PE/IC sensor with new one.
5. If the problem is not solved, replace the Main board with new one.
Unit Level Troubleshooting
Revision B
Table 3-18. General Error indication on the STM3
General Error indication on the STM3
Step
No.
Detail phenomenon
2
3
Check point Remedy
When the printer is turned on, the CR unit dose not move at all in the power on sequence.
1. Check if the CR motor connector is connected CN2 on the
Main board.
2. Check if the coil resistance of the CR motor is about 7.8ohm by using the tester.
1. Connect the CR motor connector to the CN2 on the Main board.
2. Replace the CR motor with new one.
When the printer is turned on, PF roller dose not rotate at all in the power on sequence.
1. Check if the PF motor connector is connected to the CN3.
2. Check if the PF motor coil resistance is about
7ohm by using tester
3. If the problem is not solved, replace the Main board with new one.
1. Connect the PF motor connector to the CN3 on the Main board.
2. Replace the PF motor with new one.
3. If the problem is not solved, replace the Main board with new one.
61
EPSON Stylus COLOR 480
Table 3-19. General Error indication on the STM3
General Error indication on the STM3
Step
No.
Detail phenomenon Check point Remedy
1. Check if the Top housing is secured with the fixing screw at the front side.
1. Secure the Housing fixing screw at the printer front side.
Top housing
4
When the printer is turned on, it sounds strange noise and the
CR unit is stopped around the CR lock lever.
2. Check if the Change lever is placed to the printer front side.
Change lever
2. Turn back the Change lever to the printer back side with the tweezer or small screw driver.
3. Check if the PF motor is operated. Check the
CN3 connector and the coil resistance for PF motor.
4. If the CR lock lever is not released even if the
PF motor rotate in the power on sequence, check if one of the gears has any damage in the PF motor torque transportation path.
3. Connect the PF motor cable to CN3 on the
Main board.
Replace the PF motor with new one.
4. Change the damaged gear with new one.
5. If the problem is not solved, replace the Main board with new one.
Troubleshooting Unit Level Troubleshooting
Revision B
Table 3-20. Communication error on the STM3
Communication Error on the STM3
Step
No.
Detail phenomenon
1
2
Check point Remedy
When the printer is turned on, printer dose not operate at all.
1. Check if neither CR motor nor PF motor work at all when the printer is turned on.
1. Replace the PS board with new one.
When the printer is turned on, power on sequence is operated correctly. But, when any print job is sent to printer, communication error is indicated on the monitor.
1. Check if the Parallel
I/F cable supports the bi-directional transportation.
2. Check if the PC support bi-directional communication.
3. Check if SC480 printer driver is used for the print job.
4. Check if the incorrect model name is stored in the 02<H> address of the EEPROM in the
Main board.
5. Check if scan monitor is installed in the PC and it is active.
2. If the problem is not solved, replace the main board with new one.
1. Replace the Parallel I/C cable with the suitable one.
2. Change the setting of
Bi-d communication in the BIOS of the PC.
3. Install the SC480 printer driver in the PC.
4. Write down 01<H> data into the 02<H> address of the EEPOM by using the Dump.exe program.
5. Close the scan monitor in the Windows task bar or overwrite the latest
ESCPCSCAN.DLL.
6. If the problem is not solved, replace the main board with new one.
62
EPSON Stylus COLOR 480
Table 3-21. Paper is not ejected completely without any error indication
Paper is not ejected completely without any error indication
Step
No.
Detail phenomenon Check point Remedy
1. Check if the Paper eject roller rotate when the paper is ejected.
1. Assemble the Spur gear
15 to the protrusion on the pump unit.
Spur gear 15
Revision B
Table 3-22. Dot missing occur and it is not recovered with CL
Dot missing occur and it is not recovered with CL
Step
No.
Detail phenomenon Check point Remedy
1. Check if ink is ejected to the waste ink pad via pump unit in the CL sequence.
2. Check if there is any foreign material around the seal rubber parts on the cap assembly.
.
1. If ink is not ejected at all to the waste ink pad in the
CL sequence, proceed the following check point 2).
2. Remove the foreign material around the seal rubber parts.
1
Printing is normal.
But, the paper is not ejected completely and the bottom area stay around the Paper eject frame.
2. Check if the Paper eject frame is secured with the three fixing screws to the Main frame.
Paper eject frame
2. Secure the Paper eject frame witt the two fixing screws to the Main frame.
1
In the CL sequence, the pump unit seems work correctly. But, ink is not ejected to the waste ink pad at all.
Moreover, any ink is not absorbed from the head to the cap.
Cap seal rubber parts
3. Check if any damage is observed around the seal rubber parts on the cap assembly.
3. Replace the Cap assembly with new one.
4. Check if the two compression spring are assembled in the
Cap assembly correctly.
4. Set the Compression spring into the Cap assembly.
Compression spring
Troubleshooting Unit Level Troubleshooting 63
EPSON Stylus COLOR 480
Table 3-23. Dot missing occur and it is not recovered with CL
Dot missing and it is not recovered with CL
Step
No.
Detail phenomenon Check point Remedy
5) Check if the Pump
tube is connected to
the bottom of the Cap
assembly correctly
5) Connect the Pump tube
to the bottom of the Cap
assembly deeply.
1
In the CL sequence, the pump unit seems work correctly. But, any ink is not ejected to waste ink pad.
Moreover, any ink is not absorbed from the head to the cap.
Pump tube connection point
6) Check if the pump tube
has a little slack
between the Cap
assembly and the pump
unit when the Cap
assembly is slide up
completely.
Cap assy.
6) Pump unit may coil the
pump tube inside the unit.
In this case, pull out the
coiled tube from the
pump unit carefully.
After that, connect the
pump tube to the Cap
assembly after placing
the tube correctly.
Tube
Pump unit
7) If the problem is not
solved, replace the Pump
unit with new one.
Revision B
Table 3-24. Dot missing occur and it is not recovered with CL
Dot missing occur and it is not recovered with CL
Step
No.
Detail phenomenon
2
3
Check point Remedy
In the CL sequence, ink is ejected to the
Waste ink pad (this means pump unit & cap unit are working correctly). But, the dot missing is not solved at the specific nozzles even if the several CLs are performed.
1. Check if the segment in the nozzle check patter is reduced every
CL & Nozzle check pattern printing.
2. Check if any damage is observed on the
Head FFC.
In the CL sequence, ink is ejected to the
Waste ink pad. But, dot missing is occurred on all nozzle in the printing and is not solved in the several
CLs.
1. Check if the Head
FFC is connected to the
CN4 on the Main board or Head FFC.
1. Replace the I/C with new one in the I/C replacement sequence.
2. Replace the Head FFC with the new one.
3. Replace the printhead with new one.
1. Connect the Head FFC securely to the CN4 on the Main board or
Printhead.
2. Replace the Printhead with new one.
3. Replace the Main board with new one.
Troubleshooting Unit Level Troubleshooting 64
EPSON Stylus COLOR 480
.
Table 3-25. Print quality is not good
Print quality is not good
Step
No.
Detail phenomenon Check point Remedy
Vertical banding is appeared against the
CR movement direction. And it looks like uneven printing.
1. Check if each segment is printed correctly in the nozzle check pattern.
2. Check if the surface of the CR guide shaft dose not have any sever stain.
3. Check if the surface of the CR sliding portion on the Paper eject frame has enough oil.
1. Perform the CL and check the nozzle check pattern.
2. Clean the surface of the
CR guide shaft with the dry soft cloth and lubricate G-55 inside the
CR guide shaft. Refer to
3. Clean the surface of the
CR sliding portion on the
Paper eject frame and lubricate specific amount of the G-26.
1
CR movement direction
G26 lubrication
4. Check if the CR guide shaft is assembled in the correct portion securely.
4. Reassemble the CR guide shaft into the mounting slat on the both side frame and secure it with Rod
5. Replace the CR guide shaft with new one.
5. Check if the surface of the CR guide shaft is flat.
6. Check if the surface of the Paper eject frame is flat.
6. Replace the Paper eject frame with new one.
Revision B
Table 3-26. Print quality is not good
Print quality is not good
Step
No.
Detail phenomenon
1
2
Check point Remedy
Ditto
7) Check if the rubber parts are stuck inside the
I/C cover.
Micro banding appears horizontally against the paper feeding direction and it appears with the same width.
CR movement direction
1. Check if each segment is printed correctly in the nozzle check pattern.
2. Check if the suitable paper is used according to the printer driver setting.
3. Check if the Paper feed roller is dirty.
4. Check if the following parts do not have any damage.
• Combination gear 8.4,
21.6
• Combination gear
9.6,33.6
• Spur gear 35.4.
• Spur gear 15
7. Stick the rubber parts
inside the I/C cover.
8) Replace the following
parts.
• CR motor
• CR timing belt
• Compression spring 15.7
1. Perform the CL and check the nozzle check pattern. by using the
Adjustment program.
2. Use the suitable paper according to the printer driver setting.
3. Clean the surface of the
PR roller carefully with the soft brush
4. Replace the damaged parts with new one.
5. Replace the Printhead with new one.
Troubleshooting Unit Level Troubleshooting 65
EPSON Stylus COLOR 480
3 d
Table 3-27. Print quality is not good
Print quality is not good
Step
No.
Detail phenomenon Check point
Printing is blurred.
Remedy
1. Check if the suitable paper is used according to the printer driver setting.
2. Check if the correct head ID is stored in the
EEPROM by using the
Adjustment program.
1. Use the suitable paper according to the driver setting.
2. Input 6 digits code of the head ID into the
EEPROM by using the
Adjustment program.
4 Ink stains the paper
1. Check if the following parts are stained with ink.
• Upper paper driven roller
• PF roller
• Paper guide front
• Paper eject roller.
2. Check if there is some ink drops around the backside of the printhead.
3. If the bottom area of the printed paper has ink stain, check if the
Paper eject frame is secured with three screws.
4. If the bottom area of the printed paper has ink stain, check if the
Paper eject frame is bent upward.
1. Clean the ink stained parts with soft cloth
2. Wipe off the ink drop with the soft cloth carefully.
3. Secure the screws fixing the Paper eject frame.
4. Replace the Paper eject frame with new one.
Troubleshooting Unit Level Troubleshooting
Revision B
66
DISASSEMBLY AND ASSEMBLY
C H A P T E R
EPSON Stylus COLOR 480
4.1 Overview
This section describes procedures for disassembling the main components of the Stylus
COLOR 480. Unless otherwise specified, disassembly units or components can be reassembled by reversing the disassembly procedure. Things, if not strictly observed, that could result in injury or loss of life are described under the heading “Warning”. Precautions for any disassembly or assembly procedures are described under the heading “CAUTION”.
Chips for disassembling procedures are described under the heading “CHECK POINT”.
If the assembling procedure is different from the reversed procedure of the disassembling, the procedure is described under the heading “REASSEMBLY”.
Any adjustments required after disassembling the units are described under the heading
“ADJUSTMENT REQUIRED”. When you have to remove any units or parts that are not described in this chapter, refer to the exploded diagrams in the appendix.
Read precautions described in the next section before starting.
Revision B
4.1.1 Precautions
See the precautions given under the handling “WARNING” and “CAUTION” in the following column when disassembling or assembling EPSON Stylus COLOR 480.
W A R N I N G n
Disconnect the power cable before disassembling or assembling the printer.
n
Wear protective goggles to protect your eyes from ink. If ink gets in your eye, flush the eye with fresh water and see a doctor immediately.
n
If ink comes into contact with your skin, wash it off with soap and water. If irritation occurs, contact a physician.
n
A lithium battery is installed on the main board of this printer. Be sure to observe the following instructions when serving the battery:
1. Keep the battery away from any metal or other batteries so that electrodes of the opposite polarity do not come in contact with each other.
2. Do not heat the battery or put it near fire.
3. Do not solder on any part of the battery. (Doing so may result in leakage of electrolyte from the battery, burning or explosion. The leakage may affect other devices close to the battery.)
4. Do not charge the battery. (An explosion may be generated inside the battery, and cause burning or explosion.)
5. Do not dismantle the battery. (The gas inside the battery may hurt your throat. Leakage, burning or explosion may also be resulted.)
6. Do not install the battery in the wrong direction. (This may cause burning or explosion.) n
Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacture. Dispose the used batteries according to government’s law and regulations.
Disassembly and Assembly Overview 68
EPSON Stylus COLOR 480
C A U T I O N Risque d’explosion si la pile est remplacée incorrectment. Ne remplacer que par une pile du même type ou d’un type équivalent recommandé par le fabricant. Eliminer les piles déchargées selon les lois et les règles de sécurité en vigueur.
C A U T I O N n
Never remove the ink cartridge from the carriage unless this manual specifies to do so.
n
When transporting the printer after installing the ink cartridge, be sure to pack the printer for transportation without removing the ink cartridge.
n
Use only recommended tools for disassembling, assembling or adjusting the printer.
n
Apply lubricants and adhesives as specified. (See Chapter 6 for details.) n
Make the specified adjustments when you disassemble the printer.
(See Chapter 5 for details.) n
When assembling, if an ink cartridge is removed and needs to be installed again, be sure to install a new ink cartridge because of the following reasons;
1. Once the ink cartridge mounted on the printer is removed, air comes in and creates bubbles in the cartridge. These bubbles clog ink path and cause printing malfunction.
2. If an ink cartridge in use is removed and is reinstalled, ink quantity will not be detected correctly since the counter to check ink consumption is cleared.
n
Because of the reasons above, make sure to return the printer to the user with a new ink cartridge installed.
4.1.2 Tools
Use only specified tools to avoid damaging the printer.
Name
Phillips Screw Driver (No.1)
Phillips Screw Driver (No.2)
Nipper
Tweezers
Supplier
EPSON
EPSON
EPSON
EPSON
Revision B
Parts No.
B743800100
B743800200
B740500100
B741000100
Disassembly and Assembly Overview 69
EPSON Stylus COLOR 480
4.1.3 Work Completion Check
If any service is made to the printer, use the checklist shown below to confirm all works are completed properly and the printer is ready to be returned to the user.
Table 4-1. Work Completion Check
Classification
Item
Main Unit
Adjustment
Self-test
On-line Test
Printhead
Carriage
Mechanism
Paper Feeding
Mechanism
Specified
Adjustment
Check Point Status
Is the operation normal?
Is the printing successful?
Is ink discharged normally from all the nozzles?
Does it move smoothly?
Is there any abnormal noise during its operation?
Is there any dirt or foreign objects on the CR Guide Shaft?
Is the CR Motor at the correct temperature?
(Not too heated?) o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary
Is paper advanced smoothly?
• No paper jamming?
• No paper skew?
• No multiple feeding?
• No abnormal noise?
o
Checked o
Not necessary
Is the PF Motor at correct temperature?
Is the paper path free of any obstructions?
Are all the adjustment done correctly?
o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary
Revision B
Classification
Lubrication
Function
Packing
Others
Table 4-1. Work Completion Check (continued)
Item
Specified
Lubrication
ROM Version
Ink Cartridge
Protective
Materials
Attachments,
Accessories
Check Point Status
Are all the lubrication made at the specified points?
Is the amount of lubrication correct?
Version:
Are the ink cartridges installed correctly?
Have all relevant protective materials been attached to the printer?
o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary o
Checked o
Not necessary
Have all the relevant items been included in the package?
o
Checked o
Not necessary
Disassembly and Assembly Overview 70
EPSON Stylus COLOR 480
4.2 Disassembly
The flowchart below shows step-by-step disassembly procedures. When disassembling each unit, refer to the page number shown in the figure.
Revision B
U p p e r H o u s i n g
r e m o v a l
P r i n t h e a d r e m o v a l
C R M o t o r
r e m o v a l
C i r c u i t b o a r d
r e m o v a l
W a s t e D r a i n I n k
P a d u n i t r e m o v a l
P F M o t o r r e m o v a l
I n k S y s t e m u n i t
r e m o v a l
C a p u n i t r e m o v a l
P u m p u n i t r e m o v a l
M a i n B o a r d u n i t
r e m o v a l
P S B o a r d u n i t
r e m o v a l
R e m o v i n g t h e
L D R o l l e r u n i t
R e m o v i n g t h e
P a p e r E j e c t R o l l e r
L D R o l l e r r e m o v a l
H P / P E / I C S e n s o r
r e m o v a l
R e m o v i n g t h e
P F R o l l e r u n i t
C R u n i t r e m o v a l
A S F f r a m e u n i t d i s a s s e m b l i n g
Figure 4-1. Disassembling Flowchart
Disassembly and Assembly Disassembly 71
EPSON Stylus COLOR 480
4.2.1 Housing removal
1.
Open the printer cover and remove 1 screw (C.B.P-TITE R 3x6 R/Uc screw) at the printer front side.
Revision B n
Tightening Torque for screw
• C.B.P-TITE R3x6 R/Uc screw for housing front side: 6 +/- 1kgf.cm
• C.B.S 3x6 F/Zn screw for housing back side : 6+/- 1kgf.cm
C.B.T-TITE R 3X6 R/Uc screw
Figure 4-2. Removing 1screw for Housing
2.
Remove 1 screw (C.BS. 3x6 F/Zn screw) at the back of the printer and remove the
Housing.
C.B.S 3X6 F/Zn screw
Figure 4-3. Removing 1scew for Housing
Disassembly and Assembly Disassembly 72
EPSON Stylus COLOR 480
4.2.2 Printhead removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Open the Cover cartridge and remove the both black and color ink cartridges.
3.
Release the Printhead FFC from the cable holder in the left side of the CR unit.
4.
Remove one screw (C.B.P.-TITE 3 x 6 F/Zn) tightening the Printhead at the left side of the CR unit.
C.B.P-TITE 3X6 F/Zn
Revision B
6.
Disconnect the Printhead’s FFC from the connector on the Printhead.]
C H E C K
P O I N T n
Place the Printhead’s FFC in the cable holder by the four
portions indicated in the following Figure4-6.
n
Make sure that the Head Grounding Plate is installed to the
carriage correctly. Refer to Figure 4-7.
n
Make sure that two holes of the Printhead correctly fit in the
installing position pins. Figure 4-7.
Head FFC
Figure 4-4. Removing the Printhead’s FFC
5.
Remove the Printhead from the CR unit taking the following step.
Step2
Step1
Figure 4-5. Removing the one screw tightening the Printhead
Disassembly and Assembly Disassembly
Figure 4-6. Placing the Printhead’s FFC
73
EPSON Stylus COLOR 480
Head installing position pins
Head grounding plate
Figure 4-7.
Printhead installing the position pin & the grounding plate.
n
Tightening Torque for screw
• C.B.P-TITE 3x8 screw for printhead: 6+/1kgf.cm
A D J U S T M E N T
R E Q U I R E D
When the Printhead is replaced with a new one, following adjustments must be performed in the order below: Refer to
1.
Initial ink charge
2.
Printhead ID input
3.
Bi-d adjustment
When the Printhead is removed and reinstalled, only the following
adjustment is required. Refer to Page106.
1.
Head cleaning
2.
Bi-d adjustment
Disassembly and Assembly Disassembly
Revision B
74
EPSON Stylus COLOR 480
4.2.3 CR motor removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Move the CR unit from the CR home position to around the center position.
3.
Push the CR motor from the right to left to slack the CR timing belt.
4.
Take off the CR timing belt from the Pinion gear of the CR motor.
CR Timing belt
Step 1
Revision B
7.
Remove the CR motor from the Printer mechanism taking the following step:
- Slide the CR motor to right side. (Step2)
- Slide the CR motor to backward to take off the fixing part placing the right side of
the CR motor. (Step3)
- Slide the CR motor to the left side to take off the fixing part placing the left side of
the fixing part. (Step 4).
3
4
2
1
Step 2
Figure 4-8. Taking off the CR timing belt.
5.
Remove the Compression spring 15.7 and Holder reinforcement plate between the CR motor holder and the protrusion on the Main frame with the tweezers.
Compression spring 15.7
Figure 4-10. Removing the CR motor
8.
Take the CR motor’s cable out from the cable hook in the Waste drain ink pad unit.
9.
Disconnect the CR motor connector cable from the CN2 on the Main board with tweezers.
A D J U S T M E N T
R E Q U I R E D n
The Gap adjustment (Bi-d adjustment) is required when the CR
motor is removed or replaced. Refer to Page115.
Holder Reinforcement Plate n
Connect the CR motor connector cable to the CN2 on the Main board. Use of tweezers or pincers is recommended to facilitate the job, since the CN2 is not located near the rear edge of the
Main board. n
Make sure to set the Holder reinforcement plate with the
Compression spring 15.7. Refer to Figure4-9.
Figure 4-9. Remove the Compression spring 15.7Compression spring 15.7
6.
Slide the CR motor holder along with the CR motor to the left side
Disassembly and Assembly Disassembly 75
EPSON Stylus COLOR 480
4.2.4 Circuit board removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove two screws (CB.S. 3x6, F/Zn) securing the Front Housing (Stacker guide) and remove the Front Housing (Stacker Guide).
Revision B
4.
Remove four screws (C.B.S.3x6, F/Zn) securing the Circuit board unit at the back side of the Printer mechanism and remove two screws (C.B.S. 3x6, F/Zn) securing the
Circuit board unit at the right side (viewed from back side).
C.B.S. 3X6 F/zn
Front Housing
(Stacker Guide)
C.B.S 3x6 F/Zn
Figure 4-11. Removing the Front Housing (Stacker Guide)
3.
Remove two screws (C.B.S. 3x6, F/Zn) securing the Circuit board unit at the front side of the Printer mechanism.
C.B.S. 3x6 F/Zn
Figure 4-12. Removing two screws at the printer front side
Figure 4-13. Removing six screws at the printer back side & right side
5.
Holding the Left housing lightly, pull down the Circuit board unit. Then disconnect the following four cables from the corresponding connectors on the Main board.
n
CR motor connector cable : CN2 n
PF motor connector cable : CN3 n
Printhead FFC : CN4 n
HP/PE/IC sensor cable : CN1
6.
Remove the following screws securing each circuit board to the Shield plate. Figure
n
C364 MAIN/B : Remove five screws.
C.B.S. 3x6, F/Zn (Red circled screws)
C.P. 3x6, F/Zn (Yellow circled screws)
: 3pcs (for Main board)
: 2pcs (for Parallel I/F) connector) n
C364PSB/E : Remove five screws.
C.B.S, 3x6, F/Zn (Yellow circled screws)
C.B.S-TITE R, 3x6, F/UC (Red circled screw)
: 3pcs (for PS board)
: 1pcs (for PS board)
C.B.(O),4x5, F/ZG for 120V (Green circled screw):1pcs (for Earth terminal)
Hexagon nut, Normal M4(Green circled) :1pcs (for Earth terminal)
(C.B.S Screw 3x6, F/Zn for 220V (Green circled screw): 1pcs (for Earth terminal))
Disassembly and Assembly Disassembly 76
EPSON Stylus COLOR 480
NOTE: 110V type of the PS board dose not have earth wire.
C364 MAIN Board C364 PSE/PSE board
Figure 4-14. Remove the screw securing each circuit board.
A D J U S T M E N T
R E Q U I R E D
When replacing the Main board with a new one, perform the following service items. n
Before removing the Main board, connect the parallel I/F
Cable and try to read out the following data by using the
Adjustment program. If this operation succeeds, replace the
Main board and write the read out data to the new Main board
through the Adjustment program. Refer to Page111.
1) I/C Ink consumption counter.
2) Waste ink drain pad counter.
3) Printhead ID input.
4) Gap adjustment (Bi-d adjustment)
In case the above mentioned data are not able to be read out from the defective Main board, perform the following service items.
n
Replace the both ink cartridges with a brand new one.
n
Replace the Waste ink drain pad with a new one.
n
Input the Printhead ID.
n
Adjust the Bi-d alignment.
Disassembly and Assembly Disassembly
Revision B n
Since the cable between C364 MAIN board and C364 PSB/E board are directly soldered, take the following steps when replacing only one circuit board in the service activity.
1.
Take off the cable on the Main board by removing the solder by heating it with the soldering iron.
2.
Replace the defective circuit board with new one.
3.
Insert the tip of the cable into the soldering hole of the ASP Main board and solder it securely.
n
Tightening Torque for screw
• C.B.S. 3x6 F/Zn screw for PS board : 6+/- 1kgf.cm
• C.B.S TITE R 3x6,F/Uc screw for PS board : 6+/- 1kgf.cm
• C.B.S. 3x6 F/Zn screw for Main board : 6+/- 1kgf.cm
• C.P. 3x6,F.Zn screw for Parallel I/F connector : 6+/- 1kgf.cm
• C.B.S. 3x6 F/Zn screw for Circuit unit : 6+/- 1kgf.cm
• C.B.(O) 4x5, F/ZG screw for Earth cable : 11+/-1kgf.cm
77
EPSON Stylus COLOR 480
C H E C K
P O I N T
When replacing or removing the PS board, be sure to use the following suitable screw to secure the PS board.
C.B.S-TITE R, 3x6, F/UC
Figure 4-15. PS board fixing screws.
n
Install a new cartridge before sending back the printer to the user, since the ink cartridge once taken out can not be used again.
n
Installation of I/C must be carried out by I/C replacement sequence. Otherwise, ink may not eject properly.
Disassembly and Assembly Disassembly
Revision B
78
EPSON Stylus COLOR 480
C H E C K
P O I N T n
Check the Earth terminal and wire position. Refer to the following figure. The earth wire for 120V must be placed back side of the Heat sinker HT1. And the earth wire for 220V must be placed in front of the Heat sinker HT1 as following figure.
Earth terminal
120v Type
Heat sinker
Earth terminal
220V Type
Heat sinker
Figure 4-16. Earth terminal and wire position
Disassembly and Assembly Disassembly
Revision B
79
EPSON Stylus COLOR 480
4.2.5 Waste drain ink pad unit removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove one screw (C.B.P TITE 3x8 F/Zn screw) on the front right side of the printer.
(viewed from front side)
Revision B
.
C H E C K
P O I N T n
After assembling the Waste drain ink pad unit, be sure to set the following three cables in the cable hook in the Waste drain ink pad unit. Refer to the
n
When assembling the Waste drain ink pad unit, be sure to set the tip of the waste ink tube in the suitable position of the Waste
drain ink pad. Refer to the Figure 4-19
Waste drain ink pad
C.B.T TITE 3x8 F/Zn screw
Figure 4-17. Removing one screw securing the Waste ink pad unit
3.
Remove one screw (C.B.P. TITE 3x8 F/Zn screw) and take three cables off from the cable hook in the Waste drain ink pad unit as shown in the following figure.
Pump unit Ink tube
Peel off the adhesive tape
C.B.S. TITE 3X8 F/Zn screw
Cable holder
Figure 4-18. Removing one screws & cables at the back side of the printer
4.
Remove the Waste drain ink pad unit from the printer
Disassembly and Assembly Disassembly
Figure 4-19. Drain ink tube setting position
A D J U S T M E N T
R E Q U I R E D
When the Waste drain ink pad is replaced with a new one, following service item is required.
n
Waste drain ink counter reset operation. Refer to Page116.
n
Tightening torque for screw
• C.B.P. TITE 3x8 screw for Waste drain ink pad unit : 9+/1 kgf.cm
80
EPSON Stylus COLOR 480
4.2.6 PF motor removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
3.
Remove two screws (C.B.S. 3x6,F/Zn screw) securing the PF motor to the Ink system frame.
C.B.S 3x6 F/Zn screws
Revision B n
Since the CN 3 is not located near the rear edge of the Main board, it is easier to use the tweezers or pincers to connect the cable to the CN3.
n
Tightening torque for screw
• C.B.S. 3x6 F/Zn screw for PF motor : 9+/1 kgf.cm
CR motor
Figure 4-20. Removing two screws securing the PF motor
4.
Disconnect the connector cable for PF motor from CN3 on the Main board and take the cable off from the hook on the Waste drain ink pad.
5.
Remove the PF motor from the right frame.
C H E C K
P O I N T
Be sure that the PF motor cable is placed to the backward. Refer to
Disassembly and Assembly Disassembly 81
EPSON Stylus COLOR 480
4.2.7 LD Roller removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Take the Head FFC off from the Head FFC holder located along the LD roller shaft holder.
Revision B
4.
Push the two hooks of the LD roller shaft holder as shown in the following figure.
5.
Pull the LD roller shaft holder unit upward from the Main frame.
Head FFC holder
LD roller shaft holder
Figure 4-21. Taking Head FFC out from the FFC holder
3.
Remove two screws (C.B.S. 3x6, F/Zn screw) securing the LD roller holder to the
Main frame.
C.B.S 3X6 F/Zn screws
Two hooks for LD roller holder
Figure 4-23. Pushing two hooks of the LD roller shaft holder
6.
Remove the LD roller along with the Clutch mechanism from the LD roller shaft holder unit.
LD Roller shaft holder unit
Clutch mechanism
LD Roller
Figure 4-24. Removing the LD roller with Clutch mechanism.
Figure 4-22. Removing two screws securing the LD roller holder
Disassembly and Assembly Disassembly 82
EPSON Stylus COLOR 480
C A U T I O N n
Do not damage the tooth of the Spur gear 35.2 and the
Combination gear 11.2, 35.2 when assembling the LD roller shaft holder unit.
Spur gear 35.2
Revision B n
Before assembling the LD roller shaft, make sure that the round hole of the Clutch is set on the protrusion on the LD roller shaft as shown in the following figure.
round hole on the Clutch
Combination gear 11.2, 35.2
Figure 4-25.
Combination Gear 11.2, 35.2 and Spur Gear 35.2
Protrusion on the LD roller shaft
Figure 4-26. Assembling the Clutch
n
Assemble the LD roller shaft holder unit to the printer mechanism in the following procedure.
1) Set the tip of the Change lever to the printer front side.
Change lever
Disassembly and Assembly Disassembly
Figure 4-27. LD Roller shaft holder assembling procedure (1)
83
EPSON Stylus COLOR 480
2) Assemble the LD roller shaft holder unit while storing the
Paper return plate into the ASF frame.
Paper return plate
Figure 4-28. LD Roller shaft holder assembling procedure (2)
n
Fasten the LD roller shaft holder with two C.B.S 3x6 F/Zn screws in the order indicated in the following figure.
1
2
Figure 4-29. Fastening the LD roller shaft holder
n
Tightening torque for screw n
C.B.S. 3x6 F/Zn screw for LD roller shaft holder unit : 9+/1 kgf.cm
Disassembly and Assembly Disassembly
Revision B
84
EPSON Stylus COLOR 480
4.2.8 HP/PE/IC Sensor removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove the LD roller from the LD roller shaft holder. (Section 4.2.7 LD Roller removal)
3.
Remove HP/IC detection lever from the LD roller shaft holder and disconnect the cable from the sensor connector.
HP/IC detection lever
Revision B
C H E C K
P O I N T n
Make sure that the Torsion spring 0.22 is hung to the following suitable position.
Torsion spring 0.22
Tor
PE sensor lever
HP/PE/IC sensor
Figure 4-32. Torsion spring 0.22 for PE sensor lever
HP/IC sensor lever
Figure 4-30. Removing the HP/IC detection lever
4.
Release the two fixing hooks for the sensor from the LD roller shaft holder and remove the sensor.
Two fixing hooks
Torsion spring 0.22
Figure 4-33. Torsion spring 0.22 for HP/IC sensor lever
Figure 4-31. Releasing two fixing hooks for the sensor
Disassembly and Assembly Disassembly 85
EPSON Stylus COLOR 480
C H E C K
P O I N T n
Make sure that the HP/PE/IC sensor cable is placed to the suitable groove on the LD roller shaft holder.
HP/PE/IC sensor cable
HP/PE/IC sensor
Figure 4-34. Sensor cable placing position (1)
HP/PE/IC sensor cable
Figure 4-35. Sensor cable placing position (2)
n
Make sure that the each sensor lever turn back smoothly by moving it after the sensor was assembled to the LD roller shaft holder.
Disassembly and Assembly Disassembly
Revision B
86
EPSON Stylus COLOR 480
4.2.9 Ink system unit removal (Cap & Pump unit )
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove the Waste drain ink pad from the printer. (Section 4.2.5 Waste drain ink pad unit removal)
3.
Remove three screws (C.B.S. 3x6, F/Zn screw: 2pcs, C.B.S. TITE 3x6, R, F/Uc screw:
1pcs) securing the Ink system frame and the Cap assembly to the frame.
C.B.S TITE 3X6, R,F/Uc screw
C.B.S. 3X6 F/Zn screws
Revision B
C A U T I O N n
Since the compression spring is included in the Pump assembly, watch out for the spring and the gear that pop out from the unit when the Pump assembly is removed from the Ink system unit.
n
When replacing the cleaner head built in the Pump assembly, be careful of the following points.
1) Do not touch the cleaner head with your bare hands. Ware gloves or use tweezers.
2) Do not smear the head cleaner with oil or grease.
n
When installing the Cleaner head, set the rubber side (black side) facing toward the right side of the frame.
n
When installing the Cleaner head, set the two square cut offs on the Cleaner head into the two hooks on the Ink system.
Cleaner head
Figure 4-36. Removing three screws securing the Ink system
4.
Remove the Ink system unit (Cap & Pump unit) carefully along with the PF motor &
Ink system frame.
C A U T I O N When the Ink system unit is removed, be careful that the gears do not come off from each shaft on the Ink system frame.
5.
Release one hook for Cap assembly on the Ink system frame and take the Cap assembly out from the Ink system frame.
6.
Disconnect the waste drain ink tube carefully from the bottom of the Cap assembly.
hook & cut off n
When replacing the Cap Assembly, do not touch the sealing rubber portion of the Cap Assembly.
n
The component parts in the Pump Assembly are not individually supplied as ASP. So please replace the whole Pump Assembly when replacing the Pump Assembly.
n
Be careful not to crush or leave any stress on the ink tube connecting the pump assembly and the cap assembly.
Disassembly and Assembly Disassembly 87
EPSON Stylus COLOR 480
C H E C K
P O I N T n
Make sure that all gears are set in each gear shaft on the Ink system frame. The Combination gear 9.6, 33.6 must be set first on the Ink system frame.
Combination gear 9.6, 33.6
Spur gear 34.2
Combination gear
12.6, 18.4
Combination gear
8.4,21.6
Spur gear 15.2
Figure 4-37. Gear engagement on the Ink system frame
n
Make sure that the ink tube is placed along the following position.
Cap assembly
Revision B n
Tightening torque for screw
• C.B.S. 3x6 F/Zn screw for Ink system frame & Cap assy.: 9+/1 kgf.cm
• C.B.S. TITE 3x6 F/Uc screw for Ink system frame : 9+/-1 kgf.cm
Pump unit
Ink tube
Figure 4-38. Ink tube placing position
n
After installing the Pump Assembly, ensure that the cleaner parts move back and forth by rotating the Gear.
Disassembly and Assembly Disassembly 88
EPSON Stylus COLOR 480
4.2.10 Paper Eject Roller removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove three screws (C.B.S. 3x6, F/Zn screw,:2pcs, C.B.S, 3x5,F/CU screw) securing the Front frame to the Main frame.
Revision B
4.
Slide the Paper eject roller carefully to the left side and remove the Paper eject roller to the forward.
C.B.S. 3X5, F/CU screw
C.B.S 3X6, F/Zn screw
Figure 4-39. Removing the Front frame
.
3.
Lift up the right side of the Front frame and slide it to the left side a little bit and then remove it.
C A U T I O N When removing the Front frame, if the CR unit is out of the CR home position, the nozzle surface of the Printhead may come in contact with Paper guide front as soon as the Front frame is removed. This is because the CR unit is held with this frame.
Therefore, be sure to set the CR unit in the CR home position before removing the Front frame. Otherwise, the dot missing problem may occur.
C A U T I O N
Paper eject roller
Step1
Step2
Figure 4-40. Slide the Paper eject roller
Do not damage the tooth of the Spur Gear 15, EJ, with the round hole on the Main frame.
Paper eject roller
Spur Gear 15, EJ
Figure 4-41. Spur Gear 15, EJ
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EPSON Stylus COLOR 480
A D J U S T M E N T
R E Q U I R E D n
When you replace the Frame front, make sure to lubricate the specific amount of G26 to the Frame front. Refer to the Chapter
n
When you replace the Paper eject roller with new one, make sure to lubricate the specific amount of G26 to the Spur gear 15, EJ.
Refer to the Chapter 6 Figure6-10.
n
Assemble the Paper eject roller in the following procedure.
1.
Set the Spur Gear 15, EJ to the cut out hole in the Main frame.
2.
Set the narrow portions of the shaft in the Paper eject roller to the shaft guide holders on the Front paper guide.
3.
Slide the Paper eject roller to the right side carefully and engage the gear with the Combination gear 12.6, 18.4 and the Spur gear 34.2.
n
When you assemble the Front frame to the Printer mechanism, set the CR unit to the left side and assemble the Front frame from the right side. Be careful not damage the CR lock lever. n
Fasten the Front frame with C.B.S. Screw 3x6, F/Zn in the order of 1,2,3.
2
1 n
Tightening torque for screw
• C.B.S. 3x6 F/Zn screw for Front frame : 9+/-1 kgf.cm
• C.B.S. 3x5 F/Uc screw for Front frame : 9+/-1 kgf.cm
3
Disassembly and Assembly Disassembly
Revision B
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EPSON Stylus COLOR 480
4.2.11 Paper feed roller removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove the Paper Eject roller. (Section 4.2.10 Paper Eject Roller removal)
3.
Release the PF grounding spring from the Main frame.
PF grounding spring
Revision B
6.
Lift up the left edge of the Front paper guide while slanting the Front paper guide by pulling up its front edge, and then slide the Front paper guide to the left side after releasing the right hook on the Front paper guide.
Step1
Step1
Paper guide front
Figure 4-42. Releasing the PF grounding spring
4.
Set the CR unit to the home position.
5.
Release one hook located on the left edge of the Front paper guide.
hook
Front paper guide
Figure 4-43. Release two hooks of the Front paper guide
Disassembly and Assembly
Step2
Figure 4-44. Remove the Front paper guide.
7.
Fit the protrusions of the Left PF roller bushing to the notches in the frames as shown in the following figure and remove the PF roller fasten spacer with tweezer.
Left PF roller bushing
1
2
PF roller fasten spacer
Figure 4-45.
Fit the protrusions of the Left PF roller bushing to each notches
8.
Slide the Left PF roller bushing to right side as above figure Step 2.
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EPSON Stylus COLOR 480
9.
Fit the protrusions of the Right PF roller bushing to the notches in the frames as shown in the following figure
Right PF roller bushing
Revision B
C H E C K
P O I N T n
After assemble the PF roller, make sure that the dowel of the both left and right PF roller bushing holder fit in the cut hole of both frames. n
After assemble the Front paper guide to the printer mechanism, make sure that the hooks and the dowel pins on the Front paper guide is set to the fitting positions secure. Slide the Front paper guide to the right side by pushing it and make sure that the right hook on the Front paper guide is locked to the frame securely.
If the Front paper guide is not fixed securely to the suitable position, it may cause the paper jam problem.
Right hook
Figure 4-46. Fit the protrusions of the Left PF roller bushing to each notches
10. Slide the PF roller to the left side along with the both PF roller bushings and remove the PF roller from the printer mechanism.
Two dowel pins
A D J U S T M E N T
R E Q U I R E D
Figure 4-47. Front paper guide assembling notice
n
When you replace the PF roller with new one, be sure to lubricate a specific amount of G-26 between the Left PF roller bushing holder and the left edge of the PF roller. Refer to
n
When you assemble the Paper guide front to the Printer mechanism, set the CR unit to the home position and assemble the Paper guide front.
n
When you assemble the Front frame to the Printer mechanism, set the CR unit to the left side and assemble the Front frame from the right side. Be careful not damage the CR lock lever.
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EPSON Stylus COLOR 480
4.2.12 CR unit removal
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Take the CR timing belt off the CR pinion gear by pushing the CR motor to the left.
Revision B
4.
Release two CR guide shaft rod springs from the both hooks on the left and right sides of the Main frame.
Left CR guide shaft rod spring
CR timing belt
Figure 4-48. Taking the CR timing belt off
3.
Release the Printhead FFC from the cable holders on the LD roller shaft holder.
And disconnect the Printhead FFC from the connector CN4 on the Main board.
Figure 4-50. Release Left Rod spring for CR shaft
Right CR guide shaft rod spring
Figure 4-49. Taking Printhead FFC off
Disassembly and Assembly Disassembly
Figure 4-51. Release Right Rod spring for CR shaft
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EPSON Stylus COLOR 480
5.
Pull the left edge of the CR guide shaft upward to align it with the round cutout portion. Then, holding the CR unit by hand, remove the CR guide shaft by sliding it to left or right.
Revision B
C H E C K
P O I N T n
Unlike the previous products, the oil pad is not built in the CR unit.
n
Make sure that the tips of the CR guide shaft rod springs are set in the holes in the Main frame.
n
Make sure that the CR guide shaft rod springs are correctly set in the suitable position.
Refer to Figure 4-50,Figure 4-51.
n
If you disassemble the CR unit after removing the CR unit from the printer, make sure that the CR Grounding plate is assembled
in the suitable position in the CR unit. Refer to Figure 4-53.
n
.Make sure that the CR slider is assembled on the CR unit.
CR guide shaft
CR Grounding plate
C A U T I O N
Figure 4-52. Removing the CR guide shaft
Remove the CR guide shaft while holding the CR unit by hand. If you remove the CR guide shaft without holding the CR unit, the nozzle surface of the Printhead may come in contact with the
Paper guide front, which causes the dot missing problem.
CR slider
Figure 4-53. Grounding plate assembling position
n
If you remove the Printhead from the CR unit, make sure that the Head grounding plate is set in the CR unit. Refer to
n
Make sure that the groove on the CR guide shaft must be set to the left side.
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EPSON Stylus COLOR 480
C H E C K
P O I N T n
If the CR unit is disassembled or replaced with a new one, make sure that the CR timing belt is set in the assembling groove correctly as following figure.
Assembling groove
CR timing belt
A D J U S T M E N T
R E Q U I R E D
Figure 4-54. CR timing belt setting position
n
When you replace the CR unit with a new one, lubricate it with the suitable amount of the G-55 grease by the specified position.
Refer to Chapter 6 Figure 6-4.
n
When you replace the CR Pulley shaft with new one, lubricate it with the suitable amount of G-26 grease by the specific position.
n
When removing or replacing the CR unit with a new one, adjust
the Gap (Bi-d). Refer to Page115.
Disassembly and Assembly Disassembly
Revision B
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EPSON Stylus COLOR 480
4.2.13 Disassembling ASF frame unit
1.
Remove the Housing from the printer. (Section 4.2.1 Housing removal)
2.
Remove the LD roller shaft holder unit (Section 4.2.7 LD Roller removal)
3.
Remove two screws (C.B.S.-TITE (P4), 3x6, F/Zn screw, C.B.S. Screw 3x6,F/Zn +
Plain washer 3.2 x1x 7,F/Zn) securing the ASF frame unit and remove the ASF frame unit from the printer mechanism.
C.B.S TITE(P4), 3X6, F/Zn screw C.B.S. Screw 3x6, F/Zn
Plain washer 3.2x1x7,F/Zn
Change lever unit
Combination gear 22.4, 32
Revision B
ASF Frame unit
Figure 4-55. Removing the screws securing the ASF frame
4.
Remove the following gears from the ASF frame.
n
Combination gear 11.2, 32.4 n
Combination gear 22.4, 32 n
Change lever unit
Combination gear 11.2, 32.4
Figure 4-56. Removing the Gears from ASF frame unit
5.
Remove the Compression Spring 2.67 located between the ASF Frame and the Hopper, and remove the Hopper from the ASF frame.
ASF Hopper
Compression spring 2.67
ASF Frame
Figure 4-57. Removing the Compression spring 2.67
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EPSON Stylus COLOR 480
6.
Remove the Torsion spring 25.7 from the bottom of the ASF frame and the Pad holder
(Paper return plate).
Revision B
C H E C K
P O I N T n
Make sure that the each tip of the Torsion spring 25.7 is set in the slot of the Pad holder and ASF frame. Refer to Figure 4-57.
n
Make sure that the Pad holder moves smoothly after assembling it to the ASF frame.
n
Make sure the change lever setting position. Refer to following figure.
Torsion spring 25.7
ASF Frame
Figure 4-58. Removing the Torsion spring 25.7
7.
Remove the Pad holder (Paper return plate) from the ASF frame.
Pad holder
Figure 4-60. Change lever setting position
ASF Frame
Figure 4-59. Removing the Pad holder (Paper return plate)
Disassembly and Assembly Disassembly 97
.
EPSON Stylus COLOR 480 n
When you replace the ASF frame or Hopper with the new one, make sure to lubricate the specific amount of G26 into the groove
on ASF frame. Refer to Figure 6-7 & Figure6-9 in the Chapter 6.
n
Fasten the ASF unit C.B.S. TITE (P4) 3x6,F/Zn screw (left screw in the following figure), Plain washer 3.2x1x7,F/Zn & C.B.S
3x6,F/Zn screw (right screw in the following figure) in the order of following figure.
1
Figure 4-61. ASF fixing screws fastening order
n
Tightening torque for screw
• C.B.S. 3x6 F/Zn screw for ASF : 9+/-1 kgf.cm
(right screw in above figure)
• C.B.S. TITE(P4) 3x6, F/Zn screw for ASF : 9+/-1kgf.cm
(left screw in above figure)
2
Disassembly and Assembly Disassembly
Revision B
98
ADJUSTMENT
C H A P T E R
EPSON Stylus COLOR 480
5.1 Overview
This section describes the procedure for adjustments required when the printer is disassembled and assembled for repair or service.
5.1.1 Required Adjustment
Table 5-1 lists all the necessary adjustments for this printer. If any service listed in this table is carried out, all adjustments corresponding to that service item should be performed to ensure proper operation of the printer.
Table 5-1. Required Adjustment
Performance Priority 1 2 3 4
Replacing parts/Service item
Initial Ink
Charge
Head ID
Setting
Bi-D
Adjustment
Ink pad
Counter reset
Replacing the Main Board.
Replacing the printhead unit.
Replacing the CR motor.
NA
Q
NA
Q
R
NA
R
S
Q
Replacing or removing the CR assembly.
NA NA
Q
Replacing the Waste drain ink pad
NA NA NA
NOTE: “
¡”: Required Adjustment. The number in the circle shows the required adjustment order.
“NA”: Not applicable.
NA
NA
NA
NA
Q
NOTE: Following adjustments are not required on this product.
- Platen Gap adjustment
- Head Angular adjustment.
- USB ID input
NOTE: When the Main board is replaced with new one, you may have to replace the following parts also in case the EEPROM parameter back up function is not available on the defective main board.
* Waste drain ink pad
* Both Black & Color Ink Cartridge
Revision B
This section describes the detailed procedures of each adjustment by Adjustment
Program.
In this printer, it is necessary to set the adjusting information for each printer mechanism in order to maintain consistent printing function and quality, eliminating differences of each printer mechanism’s characteristics. Therefore, in case that the combination of the printer mechanism and main board changes or the print head is replaced during the repair service, you must set and save the correct information to the
MAIN board, using the exclusive adjustment program.
This section describes the detailed procedures of each adjustment by Adjustment
Program.
W A R N I N G In case any parts is removed and assembled on the repair product while running the Adjustment program, turn off the printer certainly.
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EPSON Stylus COLOR 480
5.1.2 Adjustment Program feature
This adjustment program is exclusive for Windows: the OS that allows operation of this program is Windows 95/98. The following shows programs included in this program.
C H E C K
P O I N T n
This adjustment program operates only under Windows 95/98:
This program does not operate under DOS or Windows 3.X, NT.
n
This adjustment program automatically install the appropriate program according to your OS.
n
Perform this adjustment program using parallel I/F port.
This adjustment program is composed of following two main programs.
Revision B o
Individual service adjustment program
This program provides you the adjustment item individually as same as the previous adjustment program. The available functions are as following table.
Table 5-2. Individual service adjustment program
No.
Main Menu Service
1
2
3
Adjustment
Maintenance
A4 check pattern print
Head ID input
Bi-d adjustment
Head cleaning
Initial ink charge
Refurbishment for DOA
Protection counter check / reset
EEPROM check / write
A4 check pattern print
The user interface of the main menu on this program is shown below.
Adjustment Overview
Figure 5-1. Individual service adjustment program main menu
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EPSON Stylus COLOR 480 o
Sequential repair service program
This program provides you the suitable adjustment order in the program according to the repair parts. The available functions are as following table.
Table 5-3. Sequential repair service program
Repair item Included Adjustment item
1
2
3
4
5
6
7
Printhead removal
Printhead replacement
Main board replacement
CR Unit replacement or removal
CR Motor replacement
Printer mechanism replacement
Waste Ink pad replacement
Head Cleaning, Nozzle check,
Bi-d adjustment.
Initial charge, Head ID Input,
Nozzle check, Bi-d adjustment.
EEPROM Back up, Load on EEPEOM or
Head ID input, Bi-d adjustment,
Ink pad replacement, I/C replacement
(default setting, market setting)
Bi-d adjustment
Bi-d adjustment
Initial ink charge, Head ID input, Nozzle check, Bi-d adjustment
Waste ink pad counter reset
Revision B
The user interface of the Sequential repair service program is as following figure.
Figure 5-2. Sequential repair service program main menu
5.1.3 Adjustment Program Installation Procedure
This adjustment program is in the 3.5 2HD FD. The first FD is the installer disk. When you execute Setup.exe, the installation of the program will be started under Windows
95/98. After installation is completed, the Stylus COLOR 480 icon will be automatically made in the program menu. Go “Start” -> “Program” and click the icon to start this program.
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EPSON Stylus COLOR 480
5.1.4 Adjustment Program Initial Setting menu
You have to input the following four items before entering the adjustment main menu.
o
Model name (Stylus COLOR 480) o
Interface setting (LPT1, LPT2, LPT3) o
Market (World, ESP, EIO) o
Program type (Individual service adjustment program or Sequential repair service program)
Follow the procedure below to input the initial settings.
1.
When you run this program, the following menu appears. Select the Stylus COLOR
480 in the screen below.
Revision B
3.
Select the suitable destination in the market menu. “World” is the standard destination setting except the ESP and EIO. The waste drain ink pad life for ESP & EIO product is different from World standard. So, you have to select the suitable destination in order to set the suitable waste drain ink pad life. This setting is used when the waste drain ink pad counter is reset or the main board is replaced with new one in the adjustment program.
Figure 5-3. Model Name Selection
NOTE: This printer stores model name in the PROM. Therefore, even you select the model name in the screen above, model name will not stored in the
EEPROM. Selecting model name in the screen above determines respective special command for each model.
2.
Select the Parallel Interface port number which you connect the printer to your PC as
Adjustment Overview
Figure 5-4. Destination Setting
4.
Select the Program type which you will run in the menu.
Figure 5-5. Program type selection.
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5.2 Sequential Repair Service Program feature
5.2.1 Feature
In this manual, we will explain mainly about the Sequential repair service program.
This program provides you the suitable adjustment order by selecting the repair item in the Sequential repair service program main menu. In this program, following 7 items are listed.
o
Printhead removal o
Printhead replacement o
Main board replacement o
CR unit replacement or removal o
CR motor replacement or removal o
Printer mechanism replacement o
Waste ink pad replacement
Revision B status even if the printer is error condition, and can control the printer under the error condition. Following explain you the common function of the Sequential repair service program.
o
Quit
If you want to exit this program, click the “Quit” button. Following menu is displayed on the screen. And clicking the “Quit” Button in the following menu exit the adjustment program completely. Clicking the “Next” button returns to the Top
menu (Initial setting menu) of Figure 5-3.
Figure 5-7. Quit function
o
Menu
This function is used to stop the adjustment in the each sequential program and clicking this “Menu” button returns to the Sequential repair service program main
o
Get status
This function is used to get the printer status and following figure is displayed on the screen by clicking the” Get status” button. This function can get the printer status even if the printer is error condition except the main logic circuit failure, and control the printer by using the D4 mode functions.
Figure 5-6. Sequential repair service program main menu
The “Adjusted item” in the right column shows you the adjusted item which executed in this program and it is easy to confirm the adjusted value. Additionally, this program runs under the D4 (IEEE-1284.4) protocol. So, this program can get the several error
Figure 5-8. Get status function
In the next page, we will explain the each function of the “Get Status” function.
Adjustment Sequential Repair Service Program feature 104
EPSON Stylus COLOR 480
1) Inquire
Clicking this button, you can get the following printer status.
n
Ink level of the each ink cartridge
The available remaining ink amount is displayed with figure of Ink cartridge.
n
Printer status
The status monitor can get the following 7kinds of the printer status depend on the printer status.
* Maintenance error, * Paper jam, *Paper out * Fatal error, * Ink low, *Ink end, *
Printing
2) Close
Clicking this button, you can close the Status monitor and can return to the adjustment menu.
3) D4 mode function
You can perform the following items directly from this menu.
n
Execute Head cleaning
The suitable printhead cleaning is performed based on the cleaning order.
See the “Ink Sequence” on page 41.
n
Print nozzle check pattern
This function performs the nozzle check printing.
n
Exchange ink cartridge
In this function, you can select which ink cartridge you will exchange, and can perform the I/C exchange sequence even if the printer is ink low/end condition.
Revision B n
Reset the printer
This reset function is almost same as the Power on reset and following items are reset by this function.
* Initialize printer mechanism.
* Clears the input data buffer
* Clears the print buffer
* Sets default values except I/F setting.
n
Check the Protection counter (Waste drain ink pad counter check.)
In this function, you can check the Waste drain ink pad counter. We recommend to use this function to check the counter after complete the repair.
Basically, you have to click the “Get Status” button to get the printer status.
But, when any error condition is detected by this program on the connected printer, error status is displayed automatically as following figure.
C A U T I O N
Figure 5-10. Error status of Status menu
This program’s status monitor dose not display the “Paper out” error status in the Bi-d adjustment even if the paper is out in the ASF.
When the paper is out in the ASF, this program continues to send the paper feed command until the paper is set in the ASF.
Figure 5-9. Exchange ink cartridge
Adjustment Sequential Repair Service Program feature 105
EPSON Stylus COLOR 480
5.2.2 Printhead removal
When you remove the printhead from the printer mechanism and reinstall the removed printhead to the printer mechanism, this repair item should be selected in the
Sequential repair service program.
1.
Install the removed printhead to the CR unit on the repair printer mechanism.
2.
Select the “Printhead removal” in the Sequential repair service program. Following
Printhead removal top menu is displayed.
Revision B
4.
Click the “Yes” button starts the Powerful CL in order to eject the air bubbles from the printhead cavity. In this function, CL1’ is performed and about 1/8 ink of the brand-new Black I/C and 1/18 ink of the brand-new Color I/C are consumed.
P o w e r f u l C l e a n i n g
Figure 5-13. Powerful cleaning
5.
For the next step, click the “Nozzle check” to check the nozzle condition.
After print the nozzle check pattern, following message is displayed.
Figure 5-11. Printhead removal program menu
3.
Clicking the “Powerful cleaning” displays the following message and instructs you to install the brand-new I/C.
Figure 5-14. Confirmation message for nozzle condition
6.
If any segment in the nozzle check pattern has dot missing, click the “Yes” button to perform the powerful cleaning again. If all segment is printed correctly, click the “No” button to proceed the Bi-directional adjustment function.
Figure 5-12. Confirmation message for the brand-new I/C installation
Adjustment Sequential Repair Service Program feature 106
EPSON Stylus COLOR 480
7.
Click the Bi-directional adjustment to adjust the Bi-directional printing alignment.
In the following menu, select the suitable print mode which you want to adjust, and click the “Print” button. Basically, select all printing mode for the 1st adjustment.
Revision B
9.
Select the most aligned pattern number in the printed pattern and input the number in the following menu.
Figure 5-15. Bi-d adjustment menu
8.
By clicking the “Print” Button in the above menu, following message is displayed.
Set the paper in the ASF by following the message and click the “OK” button to start the printing for the Bi-directional alignment check pattern.
Figure 5-17. Input the suitable pattern number
10. After input the suitable pattern number, click the “Retry” button to return the Bi-
directional check alignment +pattern print menu of Figure 5-15. When the “Print”
button is clicked for the 2nd check pattern printing, following message is displayed
When the same paper used for 1st check pattern printing is set in the ASF and click the
“OK” button in the following message, printer advances the paper automatically under the 1st printed pattern and the 2nd check pattern is printed from the position.
Figure 5-16. Setting the new paper in the ASF
C H E C K
P O I N T
The current setting is printed at the center of the 5kinds of the Bi-d adjustment pattern. So, check the center pattern and select the most aligned pattern number.
Adjustment
Figure 5-18. Setting the same paper in the ASF
11. Repeated Step 7) to Step 10) to adjust the Bi-directional print alignment completely.
If you exit this Bi-directional print alignment program, click the “Finish” button on the
above Figure 5-17 or Click the “Menu” button.
12. Click the “Get status” button and check the waste drain ink pad counter in this function. If the waste drain ink pad counter is around the limit counter, replace the pad and reset the counter according to the customer request.
13. Click the “Menu” button to exit the program.
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EPSON Stylus COLOR 480
5.2.3 Printhead replacement
When you replace the printhead with new one, this repair item should be selected in the
Sequential repair service program.
1.
Replace the Printhead with the new one and select the “Printhead replacement” item in the Sequential repair service program menu. Following “Printhead replacement” menu is displayed.
Revision B
NOTE: If you input the incorrect digits code for the Head voltage ID menu, following error message is displayed.
Figure 5-21. Error message for incorrect Head voltage input (1)
Figure 5-19. Printhead replacement program menu
2.
Click the “Head voltage ID Input” in the above menu. The screen below appears
Input the 6digits code by referring the head ID label stacked on the Printhead and click the “OK” button.
Figure 5-22. Error message for incorrect Head voltage input (2)
Adjustment
Figure 5-20. Head voltage input menu
Sequential Repair Service Program feature 108
EPSON Stylus COLOR 480
3.
After complete the Head voltage ID input, the following screen is displayed.
6.
After complete the Initial ink charge, following message is displayed.
Revision B
I n i t i a l i n k c h a r g e h a s c o m p l e t e d
Figure 5-23. Initial ink charge function
4.
For the next step, select the “Initial ink charge” in the above menu. Following message is displayed. Install the band-new I/C to the printer by following the message.
Figure 5-25. Nozzle check pattern function
7.
Click the “Nozzle check” in the above menu to check the nozzle condition. After print the nozzle check pattern, following message is displayed.
Figure 5-24. Confirmation message for brand-new I/C installation
5.
After install the brand-new I/C, click the “OK” button to perform the Initial ink charge in order to fill out the printhead cavity with the ink.
In this sequence, about 1/2 ink of the brand-new black I/C and 1/6 ink of the brand-new color I/C are consumed. And it takes about 110 seconds.
If you click the “No” button, the program proceed the I/C exchange sequence.
Figure 5-26. Confirmation message for nozzle condition
8.
If any segment in the nozzle check pattern is missing, click the “Yes” button to perform the powerful cleaning. If all segment is printed correctly, click the “No” button to proceed the Bi-directional adjustment function.
Adjustment Sequential Repair Service Program feature 109
EPSON Stylus COLOR 480
9.
Click the Bi-directional adjustment to adjust the Bi-directional printing alignment.
In the following menu, select the suitable print mode which you want to adjust, and click the “Print” button. Basically, select all printing mode for the 1st adjustment.
Revision B
11. Select the most aligned pattern number in the printed pattern and input the number in the following menu.
Figure 5-27. Bi-d adjustment menu
10. By clicking the “Print” Button in the above menu, following message is displayed.
Set the paper in the ASF by following the message and click the “OK” button to start the Bi-directional check pattern printing.
Figure 5-29. Input the suitable pattern number
12. After input the suitable pattern number, click the “Retry” button to return the Bi-
d irectional check pattern print menu of Figure 5-27. When the “Print” button is
clicked for the 2nd check pattern printing, following message is displayed.
When the same paper used for 1st check pattern printing is set in the ASF and click the
“OK” button in the following message, printer advances the paper under the 1st check printed pattern and the 2nd check pattern is printed on from the position.
Figure 5-28. Setting the new paper in the ASF
C H E C K
P O I N T
The current setting is printed at the center of the five Bi-d adjustment patterns. So, check the center pattern and select the most aligned pattern number.
Figure 5-30. Setting the same paper in the ASF
13. Repeat Step 9) to Step 12) to adjust the Bi-directional print alignment completely.
If you exit this Bi-directional print alignment program, click the “Finish” button on the above figure or click the “Menu”button.
14. Click the “Get status” button and check the waste drain ink pad counter in this function. If the waste drain ink pad counter is around the limit counter, replace the pad and reset the counter according to the customer request.
15. Click the “Menu” button to exit the program.
Adjustment Sequential Repair Service Program feature 110
EPSON Stylus COLOR 480
5.2.4 Main board replacement
When you replace the main board with new one, this repair item should be selected in the Sequential repair service program.
NOTE: Before replace the defective main board, connect the printer to the PC and run this program to confirm the necessary logic circuit is active.
If the CPU and I/F receiver IC, EEPROM, RAM is not broken, Status monitor will detect the Fatal error and displayed on the screen. In this case, EEPROM back up function may be available.
1.
Connect the defective printer and check if the status monitor display the Fatal error.
If the status monitor display the Fatal error, click the “Close” button to proceed the next step. (Most of the case, the fatal error is displayed).
Revision B
2.
Click the “Main board replacement” in the Sequential repair service program.
The following menu is displayed.
Figure 5-32. Click the Main board replacement
3.
Click “EEPROM back up” to read out all EEPROM data from the defective main board. The program starts to check the EEPROM condition on the defective Main board by clicking the “OK” button in the following message display on the screen.
Figure 5-31. Close the Status monitor
Figure 5-33. Check the EEPROM condition
Adjustment Sequential Repair Service Program feature 111
EPSON Stylus COLOR 480
4.
If the EEPROM is normal condition, following message is displayed. Click the “OK” button to start the EEPROM back up function.
Revision B
6.
Turn on the printer and click the “Load on EEPROM “to copy the EEPROM back up data to the new main board. It takes about 30 seconds to complete the EEPROM data copy.
Figure 5-34. Start EEPROM back up function
In case the following message is displayed, the EEPROM back up function is
disable. Click the “OK” button to proceed the Step 9) to input the necessary data to
the new main board manually.
Figure 5-37. Copy the EEPROM data to the new main board.
7.
When the EEPROM back up data is copied successfully, following message is displayed and the necessary service items for Main board replacement is completed.
Click the “Menu” button to exit this program.
Figure 5-35. EEPROM is defective.
5.
When the EEPROM back up is completed, following message is displayed.
Replace the defective main board with new one by following the message and click the
“OK” button after the replace the Main board.
Figure 5-38. EEPROM back up data copy succeed
8.
Click the “Get status” and check the Waste drain ink pad counter in this function. If the waste drain ink pad counter is around the limit counter, replace the pad and reset the counter according to the customer request.
Figure 5-36. Replace the defective main board with new one
Adjustment Sequential Repair Service Program feature 112
EPSON Stylus COLOR 480
9.
In case the EEPROM is broken on the defective main board and the EEPROM back up/ copy function is not available, replace the Main board with new one by following the message and click the “OK” button.
Revision B
12. After complete the Head ID input and Bi-d adjustment items, click the “Ink pad replacement” button. Replace the Waste drain ink pad with new one by following the message displayed on the screen. Turn on the printer after replace the Waste drain ink pad with new one and click the “OK” button to write the market setting and the default setting into the EEPROM.
Figure 5-39. Replace the defective main board with new one.
10. Click the “OK” button to proceed the following adjustment menu after turn on the printer.
Figure 5-41. Replace the Waste drain in pad & Set the market setting
13. Click the “I/C replacement” button to replace the both I/C with new one.
Replace the both I/C with new one by following the message.
Figure 5-40. Required adjustment item for main board replacement
11. Carry out the “Head voltage ID input “and “Bi-d Adjustment” by following the displayed procedure.
Figure 5-42. Replace the both I/C with new one.
14. Click the “Menu” button to exit the program.
Adjustment Sequential Repair Service Program feature 113
EPSON Stylus COLOR 480
C A U T I O N n
In case the EEPROM back up / copy function is not available and main board is replaced with new one, the new main board dose not have the current Ink counter and waste drain ink pad counter. So, you have to replace the Waste drain ink pad and both I/C with new one.
C H E C K
P O I N T
The current setting is printed at the center of the five Bi-d adjustment patterns. So, check the center pattern and select the most aligned patter number.
Revision B
Adjustment Sequential Repair Service Program feature 114
EPSON Stylus COLOR 480
5.2.5 CR unit replacement or removal
1.
After you replace or remove the CR unit in the service activity, Click the “CR unit replacement or removal” in the Sequential repair service program.
Revision B
5.2.6 CR motor replacement or removal
1.
After you replace or remove the CR motor in the service activity, Click the “CR motor replacement or removal” in the Sequential repair service program.
Figure 5-43. CR unit replacement or removal
2.
Click the” Bi-directional adjustment” to perform the Bi-directional printing alignment by following the procedure displayed on the screen.
3.
When the Adjustment is completed following message is displayed.
Figure 5-45. CR motor replacement or removal
2.
Click the” Bi-directional adjustment” to perform the Bi-directional printing alignment by following the procedure displayed on the screen.
3.
When the Adjustment is completed following message is displayed
Figure 5-44. All adjustment is completed
4.
Click the “Get status” button and check the waste drain ink pad counter in this function. If the waste drain ink pad counter is around the limit counter, replace the pad and reset the counter according to the customer request.
5.
Click the “Menu” button to exit this program.
Figure 5-46. All adjustment is completed
4.
Click the “Get status” button and check the waste drain ink pad counter in this function. If the waste drain ink pad counter is around the limit counter, replace the pad and reset the counter according to the customer request.
5.
Click the “Menu” button to exit this program.
Adjustment Sequential Repair Service Program feature 115
EPSON Stylus COLOR 480
5.2.7 Printer mechanism replacement
Stylus COLOR 480 dose not have ASP printer mechanism. So, you may not have a chance to use this function in your service activity. However, in case you change the printer mechanism in your printer swap service, use this function.
The adjustment item and the order are same as “Printhead replacement”. So, as for the
detail, refer to Section 5.2.3 on page 108.
NOTE: Use the function for the following case.
* Printer mechanism (except the waste drain ink pad and circuit board,
printhead) is changed with other one
1.
Click the “Printer mechanism replacement” in the Sequential repair service program.
Following menu is displayed.
Revision B
5.2.8 Waste ink pad replacement
When the Waste drain ink pad is replaced with new one due to the maintenance error, you have to replace the Waste drain ink pad with new one and reset the counter.
1.
Connect the printer to your PC and run the Adjustment program. If the waste drain ink pad counter reaches to the limit counter, the status monitor of this program displays the
“Maintenance error” automatically.
Figure 5-47. Printer mechanism replacement
2.
Follow the adjustment item displayed on the above menu.
For the detail, refer to Section 5.2.3 on page 108 due to the adjustment item and order
are same as “Printhead replacement”.
Figure 5-48. Maintenance error
2.
Turn off the printer and replace the Waste drain ink pad with new one. Click the
“Clear” button to clear the waste drain ink pad counter stored in the EEPROM on the
Main board after turn on the printer.
If the status monitor dose not detect the Waste drain ink pad counter correctly, click the
“Waste ink pad replacement” in the sequential repair service program and use the following function. Clicking the “Protection counter clear” button clears the counter in the EEPROM. The suitable waste drain ink pad life is set in the EEPROM automatically according to the market setting of the initial setting menu.
Adjustment
Figure 5-49. Waste drain ink pad replacement
Sequential Repair Service Program feature 116
EPSON Stylus COLOR 480
5.3 Individual service adjustment program feature
This program menu is almost same as the previous adjustment program. However, this program can run under the D4 protocol. So, followings new function is available.
o
Get status function
This function can check the printer status even if the printer is error condition except the main (CPU, I/F receiver IC, RAM) logic circuit failure, and control the printer by using the D4 mode functions.
o
Protection counter reset/check function (waste drain ink pad counter)
The previous adjustment program runs under the IEEE1284 Nibble protocol.
So, in case the protection counter reaches to the limit counter, the protection counter reset function is not available because the printer is error condition
(maintenance error). However, this function of this program can reset the counter even if the maintenance error occurs.
o
EEPROM check function
You can check the EEPROM data or can write down the specific data into the
EEPROM directly by using this function even if the printer is error condition.
However, in case the one of the main logic circuit (CPU, I/F receiver IC,
EEPROM, RAM) is broken, this function is not available.
o
Refurbishment for DOA
This function charge the cleaning liquid into the printhead cavity and eject the cleaning liquid to the waste drain ink pad. By this operation, the printhead and cap assembly is cleaned. Prepare the dummy ink cartridge and S46 cleaning liquid, injector before use this program.
Depending on the situation, use the individual adjustment program. In this section, we will explain only the important item and notice about the usage of this program.
Revision B
5.3.1 Get status function
This function is available in the Individual service adjustment program also. Use this function depend on the situation. However, if any error occurs on the printer while using the program, Status monitor is displayed automatically and indicates the error status for your confirmation. This function is completely same as the Get status function built in the Sequential repair service program.
5.3.2 Head cleaning function
This printhead cleaning is CL1’and about 1/8 of the brand-new black I/C and 1/18 of the brand-new color I/C are consumed. Before use this function, check the remaining ink amount of the both I/C by using the “Get status” function.
5.3.3 Initial ink charge function
This function consume about 1/2 of the brand-new black I/C and 1/7 of the brand-new color I/C. Before use this function, check the remaining ink amount of the both I/C by using the “Get status” function. So, do not use this function frequently.
5.3.4 Protection counter check/reset
This function resets or checks the current waste drain ink pad counter.
Especially, use the counter check function before return the repair product to your customer. If the waste drain ink pad counter is near end condition, contact your customer and recommend your customer to replace the waste drain ink pad with new one.
Adjustment Individual service adjustment program feature 117
EPSON Stylus COLOR 480
5.3.5 EEPROM check function
You can check the EEPROM data or can write the specific data into the specific address of the EEPROM directly even if the printer is error condition. (In case one of the main logic circuit such as CPU, I/F receiver IC, RAM, EEPROM is broken, this function is not available)
Select the “EEPROM check” function in the Maintenance menu. The main menu of this function is as following figure. The following three function is built in this program.
n
Check the cleaning counter
You can check the following information stored in the EEPROM.
* How many times of the manual cleaning were performed on the product.
* What kind of the manual cleaning was performed on the product. n
Check the EEPROM data
You can check the specific data stored in the specific address of the EEPROM.
n
Change EEPROM data
You can change the specific data stored in the specific address of the EEPROM.
However, do not use this function except the special case. Careless usage causes any trouble.
Revision B
C A U T I O N n
Do not use this function except the special case. Careless usage causes any trouble.
Adjustment
Figure 5-50. EEPROM function
Individual service adjustment program feature 118
EPSON Stylus COLOR 480
5.3.6 Refurbishment for DOA
If you clean the cavity of the printhead and cap assembly, this function will be useful.
C A U T I O N n
After carry out this function, replace the waste drain ink pad with new one and reset the Waste drain ink pad counter.
Otherwise, the ink or S46 liquid may leak from the pad during the transportation.
n
Prepare the following tool.
* Dummy ink cartridge, Injector, S46 liquid n
Do not carry out this program (Exchange sequence 1&2) repeatedly. This operation is available only one time.
Excessive operation causes overflow of the ink& S46 liquid. n
When you refurbish the repair product by using this program, do it on your responsibility. n
When you charge S46 liquid into the dummy ink cartridge with the Injector, make sure fill out the dummy ink cartridge with S46 liquid. In case enough S46 liquid is not charged into the dummy cartridge, the printhead will not cleaned and not filled with the
S46 liquid enough in this operation.
n
Keep the S46 liquid and the dummy ink cartridge clean.
Select the “Refurbishment for DOA” function in the Maintenance menu. The main menu of this function is as following figure.
Revision B o
Exchange sequence 1
Set the dummy I/C filled with S46 liquid into the CR unit and click the
“EXCHANGE SEQUENCE1” in the Transportation Liquid Exchange menu.
The S46 liquid is charged into the printhead cavity and ink is discharged from printhead cavity to the cap.
o
Exchange Sequence 2
Remove the dummy I/C from the CR unit and click the “EXCHANGE
SEQUENCE2” in the Transportation Liquid Exchange menu. In this sequence, the
S46 liquid is not discharged from the printhead and only the ink in the cap is discharged to the waste drain ink pad. After complete this sequence, this program set the initial ink charge flag into the EEPROM and reset the several ink consumption counters to “0”.
Adjustment
Figure 5-51. Refurbishment for DOA
Individual service adjustment program feature 119
EPSON Stylus COLOR 480
5.3.7 A4 Check pattern
We recommend to use this function to check the repaired product quality in your final stage of your repair. The following 6 items are printed on the check pattern.
Revision B
C A U T I O N
Figure 5-52. A4 Check pattern
Do not print the A4 Check pattern on the EPSON exclusive paper such as Photo quality ink jet paper. This check pattern is for the plain paper. So, use the Plain paper for this check pattern printing.
C H E C K
P O I N T n
The check point for the first black and each color solid pattern
(beta pattern 360 x 360dpi normal dot) in the A4 Check pattern is as follows.
- Any white line is not observed
- Uneven banding is not observed extremely n
The check point for the second Nozzle check pattern (120dpi) is as follows.
- Ink is fired from all nozzles.
- Uneven banding is not observed extremely.
n
The check point for the third Alignment pattern is as follows.
- Each vertical line is printed straight.
n
If any incorrect printing is observed on the A4 Check pattern, perform the head cleaning or bi-d adjustment. If the phenomenon is not improved, replace the printhead or suitable mechanical parts.
Adjustment Individual service adjustment program feature
Figure 5-53. A4 Check pattern
120
MAINTENANCE
C H A P T E R
EPSON Stylus COLOR 480
6.1 Overview
This section provides information to maintain the printer in its optimum condition.
6.1.1 Cleaning
This printer has no mechanical components which require regular cleaning except the printhead. Therefore, when returning the printer to the user, check the following parts and perform appropriate cleaning if stain is noticeable.
C A U T I O N n
Never use chemical solvents, such as thinner, benzine, and acetone to clean the exterior parts of printer like the housing. These chemicals may deform or deteriorate the components of the printer.
n
Be careful not to damage any components when you clean inside the printer.
n
Do not scratch the surface (coated part) of PF roller assembly. Use soft brush to wipe off any dusts. Use a soft cloth moistened with alcohol to remove the ink stain.
n
Do not use cleaning sheet included in the media for normal usage.
It may damage the coated surface of PF roller.
If the adhesive surface of the cleaning sheet is set to the ASF LD roller side and used to clean the ASF LD roller surface, it is no problem. o
Exterior parts
Use a clean soft cloth moistened with water and wipe off any dirt. If the exterior parts are stained with ink, use a cloth moistened with neutral detergent to wipe it off.
o
Inside the printer
Use a vacuum cleaner to remove any paper dust.
o
ASF LD Roller
If paper dust on the surface of ASF LD Roller lowers the friction, set the adhesive surface of the cleaning sheet included in the media to the surface of the ASF roller and repeat loading paper from the ASF.
Maintenance Overview
Revision B
122
EPSON Stylus COLOR 480
6.1.2 Service Maintenance
If any abnormal print (dot missing, white line, etc.) has occurred or the Status monitor indicates Maintenance Request Error (This error is displayed as “unknown error” in the
STM3), take the following actions to clear the error.
o
Head Cleaning
When dot missing or banding phenomenon has occurred, printhead cleaning operation is required by using the built-in head cleaning function. This function can be executed only from the Printer driver utility and Service Adjustment program because this printer dose not have any control panel.
Stylus COLOR 480 has 3 modes for manual cleaning and even during printing, appropriate cleaning mode is automatically selected and executed according to various conditions. When you select and execute manual cleaning in the Printer, driver utility, the most appropriate cleaning mode is selected and therefore the
cleaning completion period varies depending on the mode. (Refer to “Ink
The following is the process to perform the head cleaning from the Printer driver utility. As for the operation of the Adjustment program, refer to Chapter 5
Adjustment.
Revision B
2.
Select the Head Cleaning in the Printer driver utility and perform the Head cleaning.
After performing the head cleaning sequence, perform the print check. If you repeat cleaning without print check, the weakest cleaning, CL1 will be repeated.
1.
Make sure that the printer is in stand-by state by using the Status monitor 3.
If the printer is in standby mode, following figure is indicated on the monitor.
Figure 6-2. Head cleaning function in the Printer driver utility
Maintenance
Figure 6-1. Status monitor 3 indication
Overview 123
EPSON Stylus COLOR 480 o
Maintenance Request Error (Unknown error)
Ink is used for cleaning operation as well as printing. When ink is used for cleaning, the ink is drained to Waste Ink Pad (Ink Absorber Tray Assembly) and the amount of waste ink is recorded in the EEPROM on the MAIN board.
Due to this, when the waste ink has reached the limit of the absorbing capability of the Waste Ink Pad, Unknown Error is indicated on Status monitor 3 as following figure.
Figure 6-3. Maintenance Error indication in STM3
In this case, replace the Waste Ink Pad and clear the Waste Ink Counter stored in
EEPROM. Waste Ink Counter can be reset only from the Adjustment program because this printer dose not have control panel. As for the procedure, refer to Chapter 5
Adjustment.
Revision B
6.1.3 Lubrication
The characteristics of the grease have great affects on the mechanical function and durability, especially does the characteristics about temperature environment. The type and amount of grease used to lubricate the printer parts are determined based on the results of internal evaluations. Therefore, be sure to apply the specified type and amount of grease to the specified part of the printer mechanism during servicing.
C A U T I O N n
Never use oil or grease other than those specified in this manual. Use of different types of oil or grease may damage the component or give bad influence on the printer function.
n
Never apply larger amount of grease than specified in this manual.
Type
Grease
Grease
Table 6-1. Specified Lubricants
Name EPSON Code
G-26
G55
B702600001
1055459
Supplier
EPSON
EPSON
Maintenance Overview 124
EPSON Stylus COLOR 480
No.
1
2
3
4
Table 6-2. Lubrication Point
Lubrication Type/Point
<Lubrication Point>
• Inside the CR shaft hole of the CR unit.
Refer to Figure 6-4, "Lubrication point 1".
<Lubrication Type>
• G-55
<Lubrication Amount>
• Whole inside the CR shaft hole evenly.
40+/15mg x 2
<Lubrication Point>
• Contact point between PF roller and the PF
grounding spring. Refer to Figure 6-5,
<Lubrication Type>
• G-26
<Lubrication Point>
•
Φ1 mm x 5mm
Remarks
• Do not attach the grease to other portion of the CR unit.
• Use a syringe to apply it.
• Move the CR guide left and right, smooth out the Geese on the surface of the CR guide shaft.
• After lubrication, make sure that the carriage moves smoothly.
• Do not attach the grease to the paper path.
• Use a syringe to apply it.
• Use a syringe to apply it.
<Lubrication Point>
• Shaft of the Pully driven shaft. Refer to
Figure 6-6, "Lubrication point 3".
<Lubrication Type>
• G-26
<Lubrication Amount>
Φ
1mm x 1mm
<Lubrication Point>
• Inside the sliding slot for ASF Hopper on
the ASF Frame.Refer to Figure 6-7,
<Lubrication Type>
• G-26
<Lubrication Amount>
•
Φ
1mm x 4points
• Use a syringe to apply it.
• After lubrication, move the ASF hopper manually and smooth out the grease inside the ASF frame.
Revision B
No.
5
6
7
Table 6-2. Lubrication Point
Lubrication Type/Point
<Lubrication Point>
• Specified both edges area on the Front
frame. Refer to Figure 6-8, "Lubrication point 5".
<Lubrication Type>
• G-26
<Lubrication Amount>
•
Φ
1mm x 40mm x 2 areas
Remarks
• Use a syringe to apply it.
• After lubrication, move the CR unit left or right and smooth out the grease on the Front frame.
<Lubrication Point>
• Between the Cam parts on the LD roller
shaft and the ASF Hopper. Refer to Figure
<Lubrication Type>
• G-26
<Lubrication Amount>
•
Φ
1mm x 1mm
• The Cam parts on the LD roller shaft must touch the G-26 lubricated on the ASF hopper in the LD roller shaft rotation.
<Lubrication Point>
• Surface of the shaft on the Spur gear 15, EJ
at the Pump unit side. Refer to Figure 6-10,
<Lubrication Type>
• G-26
<Lubrication Amount>
•
Φ
1mm x 1mm
Maintenance Overview 125
EPSON Stylus COLOR 480
G-55
Figure 6-4. Lubrication point 1
Revision B
G-26
Figure 6-6. Lubrication point 3
Maintenance
G-26
Figure 6-5. Lubrication point 2
Overview
G-26
Figure 6-7. Lubrication point 4
126
EPSON Stylus COLOR 480 Revision B
35mm 40mm
G-26
Figure 6-8. Lubrication point 5
40mm 35mm
G-26
Maintenance
Figure 6-9. Lubrication point 6
Overview
G-26
Figure 6-10. Lubrication point 7
127
APPENDIX
C H A P T E R
EPSON Stylus COLOR 480
7.1 Connector Summary
7.1.1 Major Component Unit
The Major component units of this printer are as follows.
o
Main Board (C367MAIN or C367MAIN-B) o
Power Supply Board (C367PSB/PSE)
The figure below shows how these components connect.
CN2
CN1
AC Power
CN5
MAIN-B
CN6 Parallel I/F
CN4 CN3 CN2 CN1
Printhead
PF Motor
CR Motor
Printer Mechanism
HP/PE/BCO/
CCO Sensor
Figure 7-1. Connection of the Major Components
See the following tables for the connector summary for the C367MAIN board and each connector’s pin alignment.
Revision B
Table 7-1. Connector Summary for C367MAIN/MAIN-B
Connector Function Table to refer to
CN1
CN2
CN3
CN4
CN5
CN6
For connection with the HP/PE/BCO/CCO sensor
For connection with the CR motor
For connection with the PF motor
For connection with the printhead
For connection with the power supply board
For connection with the parallel interface
Pin
1
2
3
Table 7-2. CN1 - HP/PE/BCO/CCO Sensor
Signal Name I/O Function
HPPE
GND
HPPEV
In
---
---
Sensor detect signal
Ground
Sensor Power Supply
Pin
1
2
3
4
Table 7-3. CN2 - CR Motor
Signal Name I/O Function
CRA
CRB
CR-A
CR-B
Out
Out
Out
Out
Phase drive signal (A)
Phase drive signal (-A)
Phase drive signal (B)
Phase drive signal (-B)
Appendix Connector Summary 129
Pin
1
2
11
12
13
14
15
16
9
10
7
8
5
6
3
4
EPSON Stylus COLOR 480
Pin
1
2
3
4
Table 7-4. CN3 - PF Motor
Signal Name I/O Function
PFA
PFB
PF-A
PF-B
Out
Out
Out
Out
Phase drive signal (A)
Phase drive signal (-A)
Phase drive signal (B)
Phase drive signal (-B)
Signal Name
Table 7-5. CN4 - Printhead
I/O Function
THM In
CH
SP
SI1
VDD
GND2
COM
VHV
GND
LAT
GND
NCHG
GND
SCK
GND
SI2
Out
Out
Out
---
---
---
---
---
Out
---
Out
---
Out
---
Out
Thermistor detect signal
Waveform selection signal for MS shot & variable shot
Ground
Head data latch pulse output
Ground
All nozzle fire selection pulse
Ground
Serial clock
Ground
Print data output (2)
Select signal for CH signal
Print data output (1)
Logic power supply (+5V)
Ground
Head drive pulse (trapezoid waveform)
+42V power supply for nozzle selector
Appendix Connector Summary
6
7
4
5
8
Pin
1
2
3
Table 7-6. CN5 - Power Supply Board
Signal Name I/O Function
+42V
+42V
GND
GND
NC
GND
GND
+5V
In
---
---
---
---
---
---
In
Mechanism drive power supply
Mechanism drive power supply
Ground
Energy saving signal
Not connected
Ground
Ground
Logic power supply
Revision B
130
EPSON Stylus COLOR 480
7.1.2 EEPROM Address Map
Address
Table 7-7. EEPROM Address Map
Explanation Setting
00H
01H
Password 0
02H
03H
04H
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
Market
1st dot adjustment
0: World
1: Japan
2: Custom (MJ-)**
3: Custom (Stylus COLOR)**
4: Custom (other name)**
-40
≤ n
≤
40 (by 1/1440 inch)
Bi-D adjustment data
(Multi shot 2)
-36
≤ n
≤
36 (by 1/1440 inch)
Bi-D adjustment data
(Multi shot 1)
-36
≤ n
≤
36 (by 1/1440 inch)
Uni-D adjustment data
Bi-D adjustment data
(Variable shot)
Carriage speed adjustment data
Head actuator rank
ID for VhL
-36
-36
-4
≤
≤
≤ n n n
≤
≤
≤
36 (by 1/1440 inch)
36 (by 1/1440 inch)
4 (by G.A. timer unit)
Head actuator rank
ID for VhN
Head actuator rank
ID for VhM
Head actuator rank
ID for VhV
Head actuator rank
ID for AR
QPIT setting
5AH
0FH
Factory setting
5AH
0FH
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
(*1)
(*1)
(*1)
(*1)
(*1)
00H
(*1)
(*1)
(*1)
(*1)
(*1)
Revision B
Address
Table 7-7. EEPROM Address Map (continued)
Explanation Setting
QPIT setting
0EH
0FH
10H
11H
Head rank MW-ID
Reserved
Password 1
12H
13H
Head actuator rank
ID for IWAB
Head actuator rank
ID for IWCD
14H
Head actuator rank
ID for IWEF
Reserved 15H
16H-19H
Custom EEPROM sub number
1AH-
1DH
Reserved
1EH Reserved
1FH-21H Reserved
00H
00H
5AH
0FH
00H
00H
00H
00H
00H
00H
00H
00H
22H
23H
Interface selection
0: Auto
2: Serial
1: Parallel
3: USB (Reserved)
0 to 255 (by second)
00H
0AH
24H
Interface wait time
Parallel I/F speed
(Reserved)
0: High speed 1: Normal 00H
25H
26H
27H
IEEE1284.4 for
Parallel
Reserved for
IEEE1284.4 for USB
Print direction control
0: Auto
2: Off
0: Auto
2: Off
0: Bi-D
2: Auto
1: On
1: On
1: Uni-D
01H
00H
02H
Factory setting
00H
00H
5AH
0FH
00H
00H
00H
00H
00H
00H
00H
00H
00H
0AH
00H
01H
00H
02H
Appendix Connector Summary 131
EPSON Stylus COLOR 480
Address
Table 7-7. EEPROM Address Map (continued)
Explanation Setting
QPIT setting
00H 28H
29H
2AH
Reserved
Bi-d Alignment request
Reserved for CG table
2BH-2FH
30H-39H Reserved for USB
3AH-3DH
3EH CR-phase of Home
3FH
40H reserved
Password 3
41H bit2 :Bi-d Alignment request
(0=request, 1=no request)
00H
00H
00H
00H
00H
00H
00H
5AH
0FH
42H Ink flags bit7: reserved bit6: black “one time” bit5: color “one time” bit4: Initial fill required bit3: reserved bit2: in cleaning seq.
bit1: black CL required bit0: color CL required
10H
Factory setting
00H
00H
00H
10H
00H
00H
00H
00H
00H
5AH
0FH
Revision B
Address
43H
Table 7-7. EEPROM Address Map (continued)
Explanation Setting
QPIT setting
Ink flags 2 bit5: Printed after Cleaning
0: Not printed after Cleaning
1: Printed after Cleaning bit4: YMC first cartridge
0: Not first cartridge
1: first cartridge bit3: Black first cartridge
0: Not first cartridge
1: first cartridge bit2: YMC cartridge changed and cleaned
0: first cartridge
1: changed bit1: Black cartridge changed and cleaned
0: first cartridge
1: changed bit0: Black cartridge changed and cleaned
0: with YMC cartridge
1: alone
00H
44H-47H
Ink counter Cb (total)
1 count = 100 (ng)
48H-4BH
Ink counter Cy (total)
1 count = 100 (ng)
4CH-4FH
Ink counter Cm
(total)
1 count = 100 (ng)
50H
51H
Password 4
52H-55H
Ink counter Cc (total)
1 count = 100 (ng)
00H
00H
00H
5AH
0FH
00H
Factory setting
00H
00H
00H
00H
5AH
0FH
00H
Appendix Connector Summary 132
EPSON Stylus COLOR 480
61H
62H
63H
64H
5DH
5EH
5FH
60H
65H
66H
67H
Address
56H
57H
58H
59H
5AH
5BH
5CH
Table 7-7. EEPROM Address Map (continued)
Explanation Setting
QPIT setting
Cleaning counter for
CL1 counter
Cleaning counter for
CL1’ counter
Cleaning counter for
CL2 counter
Cleaning counter for out of HP CL counter
Cleaning counter for timer cleaning counter
Cleaning counter for
Bk replace CL counter
Cleaning counter for
YMC replace CL counter
Reserved
Reserved
Reserved
00H
00H
00H
00H
00H
00H
00H
Password 5
Ink counter Rb0
Ink counter Ry0
Ink counter A
0FH
00H
00H
00H
00H
00H
00H
5AH
00H
00H
00H
Factory setting
00H
00H
00H
00H
00H
00H
00H
0FH
00H
00H
00H
00H
00H
00H
5AH
00H
00H
00H
Revision B
Address
Table 7-7. EEPROM Address Map (continued)
Explanation Setting
QPIT setting
68H
69H
6AH
6BH
6CH
6DH
Reserved
Reserved
CL time accumulated printing time
Time data command which is sent from printer driver is stored only when the Timer CL is performed.
0: minute
2: 30 minutes
4: 90 minutes
1: 15 minutes
3: 60 minutes
5: 120 minutes
6EH
6FH
70H
71H
CL Time without timer command
Reserved for
Password 7
72H-79H
7AH-7FH customized model name
Time data which is generated in the
CPU clock is stored.
string of model field for Device ID
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
Factory setting
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
Appendix Connector Summary 133
EPSON Stylus COLOR 480
7.2 Component Layout
Revision B
Figure 7-2. C367MAIN Component Layout (Parts Side)
Appendix Component Layout
Figure 7-3. C367 MAIN B Component Layout
134
EPSON Stylus COLOR 480 Revision B
Appendix
Figure 7-4. C367PSB Component Layout
Figure 7-5. C367PSE Component Layout
Component Layout 135
EPSON Stylus COLOR 480
7.3 Exploded Diagram
Following pages shows exploded diagram.
Revision B
Appendix
Figure 7-6. Stylus Color 480 Exploded Diagram 1
Exploded Diagram 136
EPSON Stylus COLOR 480 Revision B
Appendix
Figure 7-7. Stylus Color 480 Exploded Diagram 2
Exploded Diagram 137
EPSON Stylus COLOR 480 Revision B
Appendix
Figure 7-8. Stylus Color 480 Exploded Diagram 3
Exploded Diagram 138
EPSON Stylus COLOR 480 Revision B
Appendix
Figure 7-9. Stylus Color 480 Exploded Diagram 4
Exploded Diagram 139
EPSON Stylus COLOR 480 Revision B
Appendix
Figure 7-10. Stylus Color 480 Packing material
Exploded Diagram 140
EPSON Stylus COLOR 480
7.4 Parts List
122
123
124
125
107
108
109
110
Code
100
101
102
103
104
105
106
200
C37
C39
C40
C41
C45
C48
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
HOUSING
COVER,PRINTER
PAPERSUPPORT
HOUSING,SUPPORT,LEFT
SHIELDPLATE,UPPER
COVER,SHIELD PLATE,LEFT
SHIELD PLATE,M/B;B
LOGO PLATE
HOUSING, FRONT
FOOT
GROUNDING,PLATE
C.B.S. SCREW
C.B.(O) SCREW,4X5,F/ZG
C,B,S-TITE R.SCREW,3X6,F/UC
C.B.P-TITE SCREW,3X8,F/ZN
BOARD ASSY., MAIN
ALUMINIUM ELECTROLYTIC CAPACITOR
ALUMINIUM ELECTROLYTIC CAPACITOR
ALUMINIUM ELECTROLYTIC CAPACITOR
ALUMINIUM ELECTROLYTIC CAPACITOR
ALUMINIUM ELECTROLYTIC CAPACITOR
ALUMINIUM ELECTROLYTIC CAPACITOR
Appendix Parts List
IC3
IC3
IC4
IC5
D8
F1
HT1
IC10
IC6
IC7
IC8
D4
D5
D6
D7
CR2
D1
D2
D3
Code
C64
CN1
CN2
CN3
CN4
CN6
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
ALUMINIUM ELECTROLYTIC CAPACITOR
CONNECTOR
CONNECTOR
CONNECTOR
CONNECTOR
CONNECTOR 57RE-40360-830B(D7B)
CERAMIC CRYSTAL
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
DIODE
FUSE
HEAT SINK
TTL-IC
EP-ROM
IC SOCKET
DRAM
EEPROM,AT93C46-10SC
RESET IC
IC
HIC
Revision B
141
EPSON Stylus COLOR 480
513
514
515
516
509
510
511
512
517
518
519
505
506
507
508
501
502
503
504
Code
IC9
Q1
Q1
Q2
Q2
300
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
HIC
C.B.SCREW,2.6X6,F/ZN
TRANSISTOR
C.B.SCREW,2.6X6,F/ZN
TRANSISTOR
BOARD ASSY.,POWER SUPPLY
FRAME,MAIN
REINFORCEMENT PLATE,HOLDER
HOLDER,MOTOR ASSY.,CR
COMPRESSIONSPRING,15.7
PUMP ASSY.
CAP ASSY.
MOTOR ASSY.,CR
MOTOR ASSY.,PF
TIMINGBELT
SPUR GEAR,15
SPRINGPIN,2X14.5
FRAME,FRONT
PULLEY,DRIVEN
SHAFT,PULLEY,DRIVEN
SPUR GEAR,34.2
COMBINATION GEAR,12.6,18.4
COMPRESSION SPRING,5.85
SPURGEAR,15.2
COMBINATION GEAR,8.4,21.6
Appendix Parts List
538
539
540
541
534
535
536
537
542
543
544
530
531
532
533
526
527
528
529
Code
520
521
522
523
524
525
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
COMBINATION GEAR,9.6,33.6
SPACER,C-RING
ROLLER,PF
BUSHING,ROLLER,PF
BUSHING,ROLLER,PF,LEFT
SPACER,FASTEN,ROLLER,PF
GROUNDING WIRE,ROLLER,PF
C-RING
PLANE WASHER,12.2X0.5X15
RODSPRING,SHAFT,CR,GUIDE
CARRIAGE
SHAFT,CR,GUIDE
SLIDER,CR
GROUNDINGPLATE,HEAD
SPUR GEAR,15,EJ
ROLLER,EJECT
PAPERGUIDE,ERONT
COVER,CARTRIDGE,BK
COVER,CARTRIDGE,C
TORSION SPRING,52.92
PAPERGUIDE,UPPER
ROLLER,DRIVEN
SHAFT,ROLLER,DRIVEN
HOLDER,STARWHEEL,FRONT
HOLDER,STARWHEEL,REAR
Revision B
142
EPSON Stylus COLOR 480
713
714
715
716
709
710
711
712
717
718
719
705
706
707
708
701
702
703
704
Code
545
546
547
548
549
700
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
STARWHEEL ASSY.,8;E
ROD SPRING,STAR WHEEL
C.C.S.SCREW
PAPERGUIDE,LEFT
SPACER,COVER CARTRIDGE
PRINT HEAD
LEVER,CHANGE
COMPRESSION SPRING,0.98
HARNESS,DETECTOR
DETECTOR,HP;C
HOLDER,SHAFT
LEVER,DETECTOR,HP
EDGEGUIDE
HOPPER
FRAME,ASF
PAD,HOPPER
HOLDER,PAD
PAD,LD,SMALL
PAD,BRAKE,EDGE GUIED
PAD,LD,C
LEVER,DETECTOR,PE
ROLLER,LD
EXTENSION SPRING,0.143
SHAFT,ROLLER,LD
CLUTCH
Appendix Parts List
734
735
736
1
3
4
NON FIG
NON FIG
NON FIG
NON FIG
NON FIG
730
731
732
733
726
727
728
729
Code
720
721
722
723
724
725
Table 7-8. Stylus COLOR 480 Parts List
Parts Name
SPUR GEAR,35.2
COMBINATION GEAR,11.2,32.4
COMBINATION GEAR,22.4,32
CABLE,HEAD;B
COMPRESSION SPRING,4.80
TORSIONSPRING,25.7
TORSIONSPRING,0.22
COMPRESSION SPRING 3.75
SHAFT,ROLLER,LD,SUPPORT
C.P.S-TITE(P4),3X6,F/ZN
TRAY,POROUSPAD
POROUSPAD,INKEJECT,LARGE
POROUSPAD,INKEJECT,SMALL
SHEET,PROTECTION;D
CLEANER, HEAD ASP
FERRITE CORE
HEXAGON NUT
INDIVIDUAL CARTON BOX FOR AMERICA
PAD PRINTER
PLASTIC PROTECTIVE BAG,360X680X0.03T
INK CARTRIDGE,B,OVERSEAS,AS
INK CARTRIDGE,C,OVERSEAS,AS
SOFTWARE CD-ROM,EAI
USER’S GUIDE
SETTING UP MANUAL
Revision B
143
EPSON Stylus COLOR 480 Revision B
Appendix Parts List 144
EPSON Stylus COLOR 480
7.5 Electrical Circuits
See the following pages for the electric circuit diagrams below: o
C367MAIN control circuit board o
C367PSB power supply circuit board o
C367PSE power supply circuit board
Revision B
Appendix Electrical Circuits 145
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- 720dpi resolution
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- Small, space-saving
- Windows exclusive printer
- IEEE-1284 parallel interface