Epson EPL-5700 User manual

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EPSON EPL-5700
4009173
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NOTICE
 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, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
 The contents of this manual are subject to change without notice.
 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.
 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 © 1996 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. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIER 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 NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

PREFACE
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPL-5700. 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. The
chapters are organized as follows:
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 troubleshooting.
CHAPTER 4. DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for disassembling 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.
APPENDIX
Provides the following additional information for reference:
• Connector pin assignments
• Electric circuit boards components layout
• Exploded diagram
• Electrical circuit boards schematics

REVISION STATUS
Rev. Date Page(s) Contents
A 1998/05/06 All First release

TABLE OF CONTENTS
PRODUCT DESCRIPTION
1.1 FEATURES.................................................................................................................................................................1-1
1.2 PAPER SPECIFICATION ...........................................................................................................................................1-6
1.3 PANEL OPERATION..................................................................................................................................................1-8
1.3.1 Power Switch .................................................................................................................................................................................. 1-8
1.3.2 Control Panel .................................................................................................................................................................................. 1-8
1.3.2.1 Switches................................................................................................................................................................................ 1-8
1.3.2.2 Lights..................................................................................................................................................................................... 1-8
1.3.3 List of Panel Setting ....................................................................................................................................................................... 1-9
1.3.4 Special(alternative) Operation..................................................................................................................................................... 1-13
1.3.4.1 Operation at Power On........................................................................................................................................................ 1-13
1.3.4.2 Up-dating ROM Program..................................................................................................................................................... 1-14
1.4 OPTIONS AND CONSUMABLE...............................................................................................................................1-15

OPERATING PRINCIPLES
2.1 OPERATING PRINCIPLES OF MECHANISM............................................................................................................2-1
2.1.1 Overview.......................................................................................................................................................................................... 2-1
2.1.2 Paper Path....................................................................................................................................................................................... 2-2
2.1.3 Paper Feed Mechanism.................................................................................................................................................................. 2-3
2.1.3.1 Paper Feed Operation........................................................................................................................................................... 2-3
2.1.3.2 Paper Empty Sensor................................................................................................................................................................2-4
2.1.4 Second Paper Feed Unit(Option)......................................................................................................................................................2-4
2.1.4.1 Mechanism...............................................................................................................................................................................2-4
2.1.4.2 Paper Empty Sensor................................................................................................................................................................2-5
2.1.4.3 Cassette Type Sensor..............................................................................................................................................................2-5
2.1.5 Laser Exposure..................................................................................................................................................................................2-6
2.1.5.1 Sub Scanning Direction(Vertical scanning direction)................................................................................................................2-6
2.1.5.2 Main Scanning Direction(Horizontal scanning direction)..........................................................................................................2-7
2.1.5.3 Printable Area ..........................................................................................................................................................................2-7
2.1.6 Charging Process..............................................................................................................................................................................2-7
2.1.6.1 Overview (Refer to Figure2-9 on the next page)......................................................................................................................2-7
2.1.6.2 Cleaning OPC drum.................................................................................................................................................................2-8
2.1.7 Developing .........................................................................................................................................................................................2-9
2.1.7.1 Overview ..................................................................................................................................................................................2-9
2.1.7.2 Function of each parts in the development part.......................................................................................................................2-9
2.1.8 Transfer Process .............................................................................................................................................................................2-10
2.1.8.1 Overview ................................................................................................................................................................................2-10

2.1.9 Fusing Process................................................................................................................................................................................2-11
2.1.9.1 Overview ................................................................................................................................................................................2-11
2.1.9.2 Fusing Temperature Control Circuit.......................................................................................................................................2-11
2.1.9.3 Prevention of paper bent from the fusing...............................................................................................................................2-12
2.1.10 Paper Eject.....................................................................................................................................................................................2-13
2.1.10.1 Face up/Face down disengage mechanism.........................................................................................................................2-13
2.2 ELECTRIC CIRCUIT...................................................................................................................................................2-14
2.3 CONTROLLER OPERATING PRINCIPLES...............................................................................................................2-16
TROUBLESHOOTING
3.1 OVERVIEW...................................................................................................................................................................3-1
3.2 ELECTRIC CHECK POINT...........................................................................................................................................3-1
3.2.1 Rating of Power Fuse F1...................................................................................................................................................................3-1
3.2.2 Coil Resistance of Main Motor..........................................................................................................................................................3-1
3.2.3 Checking Sensors .............................................................................................................................................................................3-2
3.3 PRINTER CONDITION .................................................................................................................................................3-3
3.3.1 Indication............................................................................................................................................................................................3-3
3.3.1.1 “Status” Conditions...................................................................................................................................................................3-3
3.3.1.2 “Error” Conditions.....................................................................................................................................................................3-4
3.3.1.3 “Warning” Conditions ...............................................................................................................................................................3-6
3.3.1.4 Service Req. Error....................................................................................................................................................................3-7
3.3.2 Paper Jam Sensor .............................................................................................................................................................................3-9
3.3.2.1 Overview ..................................................................................................................................................................................3-9
3.3.2.2 Paper Jam Sensor Conditions..................................................................................................................................................3-9
3.3.2.3 Resetting the Paper Jam..........................................................................................................................................................3-9

3.4 TROUBLESHOOTING................................................................................................................................................3-10
3.4.1 Handling Paper Jam ........................................................................................................................................................................3-10
3.4.1.1 Paper Jam at power on..........................................................................................................................................................3-10
3.4.1.2 Paper Jam at Paper Feed and Transporting..........................................................................................................................3-10
3.4.2 Troubleshooting for Abnormal Operations ...................................................................................................................................3-11
3.4.2.1 Abnormal Laser......................................................................................................................................................................3-11
3.4.2.2 Abnormal Polygon Motor........................................................................................................................................................3-11
3.4.2.3 Abnormal Fusing....................................................................................................................................................................3-11
3.4.2.4 Power can not be turned on...................................................................................................................................................3-11
3.4.3 Troubleshooting Print Quality Problems.......................................................................................................................................3-12
3.4.4 Horizontal Lines...............................................................................................................................................................................3-14
DISASSEMBLY AND ASSEMBLY
4.1 OVERVIEW...................................................................................................................................................................4-1
4.1.1 Precaution for Disassembly and Assembly.....................................................................................................................................4-1
4.1.2 Recommended Tools ........................................................................................................................................................................4-2
4.1.3 Specification for Screws...................................................................................................................................................................4-2
4.1.4 Work Completion Check ...................................................................................................................................................................4-2
4.2 DISASSEMBLY PROCEDURE.....................................................................................................................................4-3
4.2.1 Preparation Before Disassembly......................................................................................................................................................4-4
4.2.2 Right Cover Removal.........................................................................................................................................................................4-5
4.2.3 Paper Feed Roller Removal ..............................................................................................................................................................4-6
4.2.4 Paper Empty Sensor Removal(PE1).................................................................................................................................................4-6
4.2.5 ROM(C215PROG-B) Exchange.........................................................................................................................................................4-7
4.2.6 Control Panel Removal......................................................................................................................................................................4-8
4.2.7 Front Cover Removal.........................................................................................................................................................................4-9

4.2.8 Interlock Switch Removal ...............................................................................................................................................................4-10
4.2.9 Main Control Board Removal..........................................................................................................................................................4-11
4.2.10 Left Cover Removal.......................................................................................................................................................................4-12
4.2.11 Print Head Unit Removal...............................................................................................................................................................4-13
4.2.12 Paper Feed Roller Unit Removal ..................................................................................................................................................4-14
4.2.13 Paper Feed Solenoid Removal .....................................................................................................................................................4-15
4.2.14 Top Cover Removal.......................................................................................................................................................................4-16
4.2.15 Rear Cover Removal......................................................................................................................................................................4-17
4.2.16 Fusing Unit Removal.....................................................................................................................................................................4-18
4.2.17 Disassembling the Fusing Unit ....................................................................................................................................................4-19
4.2.17.1 Heater Lamp Removal .........................................................................................................................................................4-19
4.2.17.2 Thermister, Thermostat Removal.........................................................................................................................................4-21
4.2.17.3 Paper Eject Sensor(PS3).....................................................................................................................................................4-22
4.2.18 Transfer Roller Exchange .............................................................................................................................................................4-23
4.2.19 Power Board Removal...................................................................................................................................................................4-24
4.2.20 High Voltage Board Removal........................................................................................................................................................4-26
4.2.21 Paper Sensor(PS1) Removal.........................................................................................................................................................4-27
4.2.22 Main Motor Removal......................................................................................................................................................................4-27
4.2.23 Driving Unit Removal.....................................................................................................................................................................4-28
4.3 DISASSEMBLY AND ASSEMBLY FOR OPTIONAL SECOND PAPER FEED UNIT.................................................4-29
4.3.1 Second Paper Feed Roller Exchange ............................................................................................................................................4-29