Epson Stylus Color 400 Service Manual

EPSON

EPSON Stylus Color 400

SERVICE MANUAL

COLOR INK-JET PRINTER

SEIKO EPSON CORPORATION

4007366

NOTICE

All rights reserved. Reproduction of any part of this manual in any form whatsoever

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without SEIKO EPSON’s express written permission is forbidden.
The contents of this manual are subjects to change without notice.

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All efforts have been made to ensure the accuracy of the contents of this manual.

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However, should any errors be detected, SEIKO EPSON would greatly appreciate
being informed of them.
The above notwithstanding SEIKO EPSON can assume no responsibility f or any errors

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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 purposes only and may be
trademarks or registered trademarks of their respective companies.

Copyright  1997 by SEIKO EPSON CORPORATION
Nagano, Japan

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)
damage to equipment.

WARNING

CAUTION

The precautionary measures itemized below should always be observed when performing
repair/maintenance procedures.

Signals a precaution which, if ignored, could result in serious or fatal personal injury.
Great caution should be exercised in performing procedures preceded by
WARNING Headings.
Signals a precaution which, if ignored, could result in damage to equipment.

WARNING

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH 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 CO NNECTED, USE EXT REME CAUT ION IN W O RKING
ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

CAUTION

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED O NLY BY EPSON CERTIFIED
REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT T HE SOURCE VOLT AGE IS THE SAME AS T HE RATED VOLT AGE,
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 T HE EPSON PRODUCT HAS BEEN DISCONNECT ED 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
NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY
APPLICABLE EPSON WARRANTY.

PREFACE

This manual descr ibes functions , theory of electrical and m echanical operations , maintenanc e, and
repair of EPSON Stylus Color 400.
The instructions and procedur es included herein are intended for the experience r epair technician,
and attention should be given to die precautions on the preceding page. The Chapters are
organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the
printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENT

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides EPSON-approved techniques for troubleshooting.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to
service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and
exploded diagram.

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

REVISION SHEET

Revision Issued Data Contents

Rev. A February18. 1997 First issue

TABLE OF CONTENTS

CHAPTER 1. GENERAL DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENT
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX

EPSON OVERSEAS MARKETING LOCATIONS

EPSON AMERICA, Inc.

20770 Madrona Avenue,
P.O. Box 2842
Torrance, CA 90509-2842
Phone: [phone]
Fax: [phone]

EPSON UK LTD.

Campus 100, Maylands Avenue,
Hemel Hempstead, Herts, HP2 7TJ
U.K.
Phone: [phone]
Fax: [phone]

EPSON IBERICA, S.A.

Avda. de Roma, 18-26
08290 Cerdanyola del Valles
Balcerona, Spain
Phone: [phone]
Fax: [phone]

EPSON AUSTRALIA PTY. LIMITED

1/70 Gibbes Street,
Chatswood 2067 NSW
Australia
Phone: [phone]
Fax: [phone]

EPSON HONG KONG LTD.

Rooms 4706-10, 47/F
China Resource Bldg.
26 Harbour Road, Wanchai, Hong Kong
Phone: [phone]
Fax: [phone]

EPSON PORTUGAL, S.A.

EPSON DEUTCHLAND GmBH

Zülpicher Straße 6, 4549 Düsseldorf
Germany

Phone: [phone]
Telex: 8584786

EPSON FRANCE S.A.

68 bis, rue Marjolin 92300,
Levallois-Perret
France
Phone: [phone]
Telex: 610657

EPSON ITALIA S.P.A.

V. le F. lli Casiraghi, 427
20099 Sesto S. Giovanni MI
Italy
Phone: [phone]
Fax: [phone]

EPSON SINGAPORE PTE. LTD.

No.1 Temasek Avenue #36-00
Millenia Tower
Singapore 039192
Phone: [phone]
Fax: [phone]

EPSON TAIWAN TECHNOLOGY &
TRADING LTD.

10F, No. 287 Nonking E. Road, Sec. 3,
Taipei, Taiwan, R.O.C.
Phone: [phone]
Fax: [phone]

R. do Progresso, 471, 1° Perafita
4460 Matosinhos, Portugal

Phone: [phone]
Fax: [phone]

SEIKO EPSON CORPORATION
Imaging & Information Products Division

80 Harashinden, Hirooka, Shiojiri-Shi, Nagano-Ken 399-07 JAPAN
Phone: [phone]
Fax: [phone]

As of September, 1996

EPSON

SEIKO EPSON CORPORATION