Epson Stylus Photo 925 Bedienungsanleitung

EPSON STYLUSPHOTO925

Color Inkjet Printer

SEOT02006

SERVICE MANUAL

Notice:

TAll 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, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

TThe contents of this manual are subject to change without notice.

TAll 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.

TThe 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.

Imaging & Information Product Division

TPCS Quality Assurance Department

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.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF

SECOND-SOURCE ICs OR OTHER NON-APPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE

EPSON WARRANTY.

About This Manual

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. 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.

Manual Configuration

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

Describes the step-by-step procedures for the troubleshooting.

CHAPTER 4.DISASSEMBLY / ASSEMBLY

Describes the step-by-step procedures for disassembling and

assembling the product.

CHAPTER 5.ADJUSTMENT

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.

APPENDIX Provides the following additional information for reference:

• Connector pin assignments

• Electric circuit boards components layout

• Electrical circuit boards schematics

• Exploded diagram & Parts List

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 NOTE, CAUTION, or WARNING messages.

Indicates an operating or maintenance procedure, practice or

condition that is necessary to keep the product’s quality.

Indicates an operating or maintenance procedure, practice, or

condition that, if not strictly observed, could result in damage to,

or destruction of, equipment.

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.

Indicates an operating or maintenance procedure, practice or

condition that, if not strictly observed, could result in injury or loss

of life.

Revision Status

Revision Date of Issue Description

A June 21, 2002 First release

PRODUCT DESCRIPTION

FEATURES .................................................................................................. 12

SPECIFICATIONS........................................................................................ 13

Physical Specification.............................................................................. 13

Printing Specifications............................................................................. 13

Paper Feeding......................................................................................... 13

General Specifications for Cutter Mechanism......................................... 13

Input Data Buffer..................................................................................... 13

Electric Specification............................................................................... 14

Environmental Condition ......................................................................... 14

Reliability................................................................................................. 15

Safety Approvals..................................................................................... 15

Acoustic Noise......................................................................................... 15

Built-in Card Slots......................................................................................... 16

Card Slot Standards................................................................................ 16

Supported Memory Card......................................................................... 16

Supported Voltage................................................................................... 16

Multiple Slots Operation .......................................................................... 16

Priority..................................................................................................... 16

Exclusive Access Control against External Storage

Device Connecting Port........................................................................... 16

External Storage Device Connecting Port.................................................... 17

Compatibility............................................................................................ 17

Specifications for Devices Available........................................................ 17

Current Supply ........................................................................................ 17

Standalone Printing Function ....................................................................... 18

File System.............................................................................................. 18

Media Format.......................................................................................... 18

File Format.............................................................................................. 18

Valid Image Sizes.................................................................................... 18

Maximum Number of Photo Data Files ................................................... 18

Thumbnail Image Data............................................................................ 18

File Sorting .............................................................................................. 18

File Sort Rule 18

Date Data Capture Rule 19

Date Range 19

Control Panel................................................................................................ 20

Switches.................................................................................................. 20

Icons........................................................................................................ 20

LEDs........................................................................................................ 21

Error/Warning Display (LCD)................................................................... 21

Error 21

Warning 22

Warning Display at Initial Ink Charge 22

Button Functions ..................................................................................... 22

Power Button 22

Roll Paper Button 23

Maintenance Button 23

Print Button 23

Cancel Button 23

Up/Down Arrow Buttons 23

Select Button 23

Back Button 23

Custom Buttons 1 and 2 24

Initial Setting Values..................................................................................... 24

PAPER ......................................................................................................... 25

Paper Handling........................................................................................ 25

Paper Specification ................................................................................. 25

Cut Sheet 25

Envelope 25

Printing Area ........................................................................................... 26

Cut Sheet 26

Envelopes 26

Operating Principles

Overview....................................................................................................... 28

Printer Mechanism .................................................................................. 28

Print Head ............................................................................................... 29

Printing Process 30

Printing Method 31

Carriage Mechanism............................................................................... 31

Carriage Motor (CR Motor) 31

Carriage Home Position Detection 32

Platen Gap Adjustment Mechanism & Parallelism Adjustment Mechanism 32

Paper Feeding Mechanism ..................................................................... 33

Paper Feed Motor (PF Motor) 33

PF Motor Drive Transmission Path 33

Cutter Mechanism................................................................................... 34

Cutter Motor 34

Paper Loading Mechanism...................................................................... 35

Ink System Mechanism........................................................................... 38

Pump Unit & Wiper mechanism 38

Capping Mechanism 39

Cap Unit 39

Electrical Circuit Operating Principles .......................................................... 40

C408 PSB/PSE board ............................................................................. 40

C475 MAIN Board................................................................................... 42

Main Elements 43

Motor Driver Circuit 44

ASF/Pump Motor Drive Circuit 47

Cutter Motor Drive Circuit 47

Sensor Circuit 48

Troubleshooting

Overview....................................................................................................... 51

Troubleshooting with LED Error Indications and EPSON Status Monitor 3 Messages 52

Unit Level Troubleshooting........................................................................... 58

Disassembly and Assembly

Overview....................................................................................................... 74

Precautions ............................................................................................. 74

Tools........................................................................................................ 76

Work Completion Check.......................................................................... 77

Disassembly ................................................................................................. 78

Housing removal ..................................................................................... 79

Panel Unit removal.................................................................................. 81

Housing Lower Covers removal.............................................................. 82

Housing Lower Cover Left Rear and Front removal 82

Housing Lower Cover Right Rear and Front removal 83

Print Head removal.................................................................................. 85

CR Unit removal...................................................................................... 87

CR Encoder Board removal .................................................................... 90

LD Roller removal.................................................................................... 91

PE Sensor removal ................................................................................. 94

ASF Unit removal .................................................................................... 95

Waste Drain Ink Pad Unit removal.......................................................... 98

CR Motor removal ................................................................................... 99

ASF Motor removal ............................................................................... 100

Cutter Unit removal ............................................................................... 100

Circuit Board Unit removal .................................................................... 102

Ink System Unit removal ....................................................................... 105

PF Motor removal.................................................................................. 108

Paper Eject Roller removal.................................................................... 110

PF Roller removal.................................................................................. 112

PF Scale installation 115

Adjustment

Outline........................................................................................................ 119

Conditions for Adjustments ................................................................... 119

Adjustment.................................................................................................. 120

Parallel adjustor..................................................................................... 120

Adjustment Program................................................................................... 122

Outline................................................................................................... 122

Starting up the adjustment program...................................................... 122

EEPROM initialization ........................................................................... 123

Head ID................................................................................................. 124

CR Motor drive dispersion..................................................................... 125

Bi-D adjustment..................................................................................... 126

USB ID Input ......................................................................................... 128

First Dot Position Adjustment................................................................ 129

Cut Position Adjustment........................................................................ 129

Memory card drive confirmation............................................................ 130

Head cleaning ....................................................................................... 131

Initial ink charge .................................................................................... 131

Refurbishment for DOA......................................................................... 132

Protection counter................................................................................. 133

The number of the cutting operation ..................................................... 133

EEPROM backup data .......................................................................... 134

A4 normal paper printing....................................................................... 135

EEPROM data....................................................................................... 136

Maintenance

Overview..................................................................................................... 138

ROM Replacement................................................................................ 138

Cleaning................................................................................................ 138

Service Maintenance............................................................................. 139

Appendix

Connector Summary................................................................................... 147

Major Component Unit .......................................................................... 147

ASP List...................................................................................................... 148

Exploded Diagrams.................................................................................... 151

Electrical Circuits........................................................................................ 163

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