Epson AcuLaser C4000 User manual

EPSON AcuLaser C4000
AcuLaser C4100
AcuLaser C3000
Color Laser Page Printer
SEPG01012
SERVICE MANUAL

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, 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 © 2004 SEIKO EPSON CORPORATION.
Imaging & Information Product Division
CS/Quality Management & PL 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.
4. WHEN DISASSEMBLING OR ASSEMBLING A PRODUCT, BE SURE TO WEAR GLOVES TO AVOID INJURIES FROM METAL PARTS WITH SHARP EDGES.
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. DO NOT REPLACE IMPERFECTLY FUNCTIONING COMPONENTS WITH COMPONENTS WHICH ARE NOT MANUFACTURED BY EPSON. IF SECOND
SOURCE IC’S OR OTHER COMPONENTS WHICH HAVE NOT BEEN APPROVED ARE USED, THEY COULD CAUSE DAMAGE TO THE EPSON PRODUCT,
OR COULD VOID THE WARRANTY OFFERED BY EPSON.

About This Manual
This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the EPSON AcuLaser
C4000, AcuLaser C4100 and AcuLaser C3000. 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
Provides the step-by-step procedures for
troubleshooting.
CHAPTER 4. DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for
disassembling/assembling and adjusting 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
• 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 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.
Indicates that a particular task must be carried out
according to a certain standard after disassembly and
before re-assembly, otherwise the quality of the
components in question may be adversely affected.
A D J U S T M E N T
R E Q U I R E D
C A U T I O N
CHECK
P O I N T
W ARNING

Abbreviation
This manual uses unique abbreviations and acronyms which may differ from those in common use. Please note that they are used in the manual
descriptions without explanation. The main abbreviations and acronyms are listed below. Because the following list was formed as a general
reference, some items on the list may not appear in this manual.
In principle most acronyms were formed from the capitalized first letters of the English term for the items (there are exceptions) and most single
word abbreviations were formed either will all capitals or with only the first letter as a capital.
[A]
ADC Auto Density Control
ALM Alarm
Assy Assembly
Aux. Auxiliary
[B]
B/W Black and White
BCR Bias Charge Roll
Bk Black
BCR Bias Charge Roll
BRKT Bracket
BTR Bias Transfer Roll
BUR Back Up Roll
[C]
CCyan
CCW Counter Clockwise
Cl. Clutch
Clk Clock
CHK Check
CK Check
Conpane Control Panel
Cont Controller
CR Charge Roll
CRU Customer Replaceable Unit
CRUM CRU Memory
CST Cassette
CVR Cover
CW Clockwise
[D]
DB Developing Bias
Deve Developer
Diag Diagnostic
dpi dots per inch
DTS Detack Saw
Dup Duplex
[E]
Elec Electric
EP Electro Photography
ESS Electric Sub System
[F]
F Front
FDR Feeder
FG Frame Ground
FIP Fault Isolation Procedure
FRU Field Replaceable Unit
FX Fuji Xerox
[G]
GG Guide Gauge
GND Ground
[H]
HHigh
H/R Heat Roll
HCF High Capacity Feeder
HCS High Capacity Stacker
Hex Hexadecimal
HVPS High Voltage Power Supply
[I]
I/F Interface
I/L Interlock
ID Image Density
[J]
Jxx Jack xx

[L]
L Left
L Low
L/H Left Hand
L/P Low Paper
LD Laser Diode
LEF Long Edge Feed
LVPS Low Voltage Power
Supply
[M]
M Magenta
M/N Multi National
Mag Magnetic
MCU Machine Control Unit
Mech Mechanical
MOT Motor
MSI Multi Sheet Inserter
[N]
N/F Normal Force
N/P No Paper
NPS No Paper Sensor
NV Non Volatile
NVM Non Volatile Memory
[O]
OHP Overhead Projector
OPC Organic Photo Conductor
OPT Option
[P]
Pyy Plug yy
P/J Plug and Jack
P/H Paper Handling
P/R Pressure Roll
PL Plate
PLT Plate
PPM Print Per Minute
PV Print Volume
PWB Printed Wiring Board
PWBA PWB Assembly
[R]
R Right
R Rear
R/H Right Hand
RDY Ready
Regi Registration
ROS Raster Output Scanner
RRP Removal and Replacement
Procedure
RTN Return
[S]
SEF Short Edge Feed
SG Signal Ground
SNR Sensor
SNS Sensor
Sol Solenoid
SOS Start Of Scan
SPI Scan Per Inch
STD Stamdard
STK Stacker
STND Standard
SW Switch
Sync Synchronous
[T]
T Tooth (number of Gear)
Temp Temperature
TR Transfer
TTL Trangistor-Transistor Logic
[X]
Xero Xerographic
[Y]
YYellow
YMCBk Yellow/Magenta/Cyan/
Black
YMCK Yellow/Magenta/Cyan/
Black

Safety Information
To prevent accidents during a maintenance procedure, strictly observe
the Warnings and Cautions. Do not do anything that is dangerous or not
within the scope of this document.
Do not do anything that is dangerous even if not specifically described
in this manual. In addition to the descriptions below and those given in
this manual, there are many situations and circumstances that are
dangerous. Be aware of these when you are working with the printer.
Power Supply
Before starting any service procedure, switch off the printer power and
unplug the power cord from the wall outlet. If you must service the
printer when the power is applied, be aware of the potential for electrical
shock and do all tasks by following the procedures in this manual.
Figure 0-1. Power Supply
W ARNING
Do not touch any live part unless you are instructed
to do so by a service procedure.
The LVPS power supply switch/inlet part is live even
when the power switch has been turned off. Do not
touch any live part.
Do not touch electrified components except when
instructions indicate it is permissible to do so.

Mechanical Components
If you service a driving assembly (e.g., gears), first turn off the power
and unplug the power cord. Then manually rotate the assembly.
.
High Temperature Assembly
To prevent you from becoming injured or burned, do the following:
Before working with a high temperature Assembly (e.g., Fuser
Assembly), turn off the power, unplug the power cord and wait until it
cools down.
W ARNING
Do not touch the driving part (e.g., gears) while the
assembly (printer) is being driven.
W ARNING
The high temperature Assembly is very hot immediately
after any printer operations. Wait at least 40 minutes
before you start working on the printer.

Laser Beam
NOTE: The laser beam has a narrower frequency band and more
coherent phases than any other light (sunlight, electric light).
It has excellent monochromaticity and convergence. A thin
laser beam reaches long distances. Because of its
convergence characteristic, the laser beam converges into
one point, causing high density and high temperature. A
laser beam is harmful to the human body.
NOTE: The laser beam in this printer is invisible.
Figure 0-2. Laser Beam
W ARNING
Do not expose yourself to the laser beam to prevent
injury (blindness).
Do not open the cover that has the laser beam
warning label.
If you disassemble or assemble the printer, turn off
the power.
If you need to work on the printer with power applied,
strictly follow the instructions in this manual.
Understand how the laser beam functions and take
maximum precautions not to injure yourself or
anyone around you.