Lexmark 4022 Service manual
• Table of Contents
• Start Diagnostics
• Safety and Notices
LexmarkTM W812
4022-XXX
•Trademarks
• Index
• Manuals Menu
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/ or other countries.
4022-XXX
Edition: March 24, 2006
The following paragraph does not apply to any country where such provisions are inconsistent with local law:
LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or
implied warr anties in certain transactions; therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the
information herein; these changes wi ll be incorporated in later editions. Improvem ents or changes in the products or the
programs described may be made at any time.
Comments may be addressed to Lexmark International, Inc., Department D22A/032-2, 740 W est New Circle Road,
Lexington, Kentucky 40550, U .S.A or e-mail at ServiceInfoAndTraining@Lexmark.com. Lexmark ma y use or distribute any
of the inf ormati on you supply in any way it belie ves appropriate without incurring any obligation to you.
Lexmark Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the
United States and/or other countries. Optra Forms is a trademark of Lexmark International, Inc.
Pos tScri pt is a registered tradem ark of Adobe Systems Incorporated.
Other trademarks are the property of their respective owners.
© Copyright Lexmark International, Inc. 2002,2004.
All rights reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
This software and documentation are provi ded wit h RESTRICTED RIGHTS. Use, duplicat ion or disclosure by the
Government is subject to restrictions as set forth in subparagrap h (c)(1)(ii) of the Rights in Technical Data and Computer
Software cl ause at DFARS 252 .227-7013 and in applicable F AR provisions: Lexm ark International, Inc., Lexington, KY
40550. U.S.A.
U.S.A. P/N 12G9161
4022-XXX
Table of Conte nts
Laser Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Maintenance Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Preparing for shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Overview of Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Paper Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Generating Print Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Transmission of Driving Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Driving Power Transmission to Paper Feeder . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Driving Power Transm ission to Roll Registration Metal and Rubber . . . . . . . 1-14
Driving Power Transm ission to Drum and Transfer Roller . . . . . . . . . . . . . . . . 1-15
Driving Power Transmission to Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . 1-16
Driving Power Transmission to Roll Assembly . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Printer Component Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
250-Sheet Paper Tray/Cassette Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Paper Pick/Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Frame and Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
Xerographics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Operator Panel Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Status Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Ready . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
User Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Service Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
User Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Service Error Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Service Check Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Service Checks Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
How to Use the Service Checks Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
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How to Follow a Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Notes on Using Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12
Symptom Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Inoperative Printer Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
Erratic Printer Operation Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Blank, Erratic, or Inoperative Operator Panel Service Check . . . . . . . . . . . . . 2-16
Paper Feed Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17
Print Quality Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18
Using Diagnostic Test Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18
Light (Undertoned) Prints Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Blank Prints Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Black Prints Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
Vertical Band Deletions Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Horizontal Band Deletions Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Vertical Streaks Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25
Horizontal Streaks Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Spot Deletions Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Background Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Toner on Back of Print Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Skewed Image Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Damaged Prints Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-32
Unfused Image or Image Easily Rubs Off of Page Service Check . . . . . . . . .2-33
Repetitive Marks on Each Page Service Check . . . . . . . . . . . . . . . . . . . . . . . 2-34
Lead Edge Registration is Not Correct Service Check . . . . . . . . . . . . . . . . . . 2-35
Side-to-Side Registration is Not Correct Service Check . . . . . . . . . . . . . . . . . 2-36
Electrical Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-37
Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Using the Operator Panel Diagnostics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Entering Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Exiting Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Print Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Print Quality Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Hardware Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
LCD Hardware Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Button Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
DRAM Memory Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
DRAM Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
ROM Memory Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Parallel Wrap Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Serial Wrap Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Duplex Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Duplex Quick Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Duplex Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
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Input Tray Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Input Tray Feed Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Base Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Storage Device Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Quick Disk Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Disk Test/Clean . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Flash Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Printer Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Setting the Page Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Viewing the Permanent Page Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Configuration ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Viewing the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Clearing the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Viewing and Resetting the Maintenance Page Count . . . . . . . . . . . . . . . . . . . 3-22
Setting Printer Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Removals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Notations in the Removals and Replacement Procedures . . . . . . . . . . . . . . . . 4-1
Front Cover Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Left Cover Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Rear Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Right Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Top Cover Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Card Cage Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Duplex Output Feed Roller Assembly and Clutch Removal . . . . . . . . . . . . . . . 4-9
Engine Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Fuser Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
HVPS Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
HVPS Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Left Cartridge Guide Assem bly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Lower Duplex Out Guide Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
LVPS Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Main Drive Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
MPF Input Paper Feed Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
MPF Paper Present Flag Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
MPF Pick Roll Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
MPF Pick Roll Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
MPF Separator Pad Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
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MPF Solenoid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24
MPF Tray Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Operator Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Optional 250-Sheet Pick Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Optional 500-Sheet Pick Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Optional 500-Sheet Separator Pad/Lift Plate Assembly Removal . . . . . . . . . . 4-28
Paper Size Dial and Card Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . .4-30
Paper Tray Lift Plate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-31
Printhead Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Rear Plate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-33
Right Cartridge Guide Assem bly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
RIP Controller Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Toner Sensor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Transfer Guide Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-36
Transfer Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Tray 1 Present Switch Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-39
Tray 1 Pick Roll Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-40
Tray 1 Pick Roller Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
Tray 1 Solenoid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-42
Upper Duplex Out Guide Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-43
Upper Card Cage Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-44
250-Sheet Separator Pad Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Connector Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
P/J Location Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Harness Route Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
Printer Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-15
Wiring Diagram Notations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
General Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Engine Board <-> LVPS <-> Interlock SW and Fan (1/3) . . . . . . . . . . . . . . . .5-18
Engine Board <-> LVPS <-> Interlock SW and Fan (1/3) . . . . . . . . . . . . . . . .5-19
Engine Board <-> LVPS <-> Interlock SW and Fan (3/3) . . . . . . . . . . . . . . . .5-20
Engine Board <-> Fuser Assembly and LVPS (1/2) . . . . . . . . . . . . . . . . . . . .5-20
Engine Board <-> Printhead and Toner Cartridge (1/3) . . . . . . . . . . . . . . . . . .5-22
Engine Board <-> Printhead and Toner Cartridge (3/3) . . . . . . . . . . . . . . . . . .5-24
Engine Board <-> HVPS <-> Ton er Cartridge (BCR and Mag. Roll), Transfer Roller
and Detack Saw (1/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Engine Board <-> HVPS <-> Ton er Cartridge (BCR and Mag. Roll), Transfer Roller
and Detack Saw (3/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Engine Board <-> HVPS <-> Clutch Registration, Sensor Registration and Sensor
Option1 (1/1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Engine Board <-> Solenoid T1/MPF, Sensor LP/MPF NP/FDR LP/FD R NP, Cl utch
Turn, and SW D2X (1/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28
Engine Board <-> Solenoid T1/MPF, Sensor LP/MPF NP/FDR LP/FD R NP, Clutch
Turn, and SW D2X (3/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30
Engine Board <-> LVPS <-> Main Motor (1/1) . . . . . . . . . . . . . . . . . . . . . . . . .5-31
Engine Board <-> Sensor Toner (1/1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
vi
4022-XXX
Preventive Main ten anc e. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Safety Inspection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Parts Catalog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1
vii
4022-XXX
viii
4022-XXX
Laser Notices
Laser Adviso r y Lab el
Caution - Laser radiation when open. Avoid exposure to beam.
The following laser label may be affixed to this printer as shown.
Label
HVPS Cover
Printhead
Label
Laser Notices ix
4022-XXX
210 C/410 F
Label
Fuser Asm
Laser Not ice s
x Service Manual
The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR
Subchapter J for Class I (1) laser products, and elsewhere is certified as a Class I laser
product conforming to the requirements of IEC 60825-1.
Class I laser products are not considered to be hazardous. The printer contains internally
a Class IIIb (3b) laser that is nominally a 5 milliwatt gallium arsenide laser operating in the
wavelength region of 770-795 nanometers. The laser syst em and printer are designed so
there is never any human access to laser radiation above a Class I level during normal
operation, user maintenance, or prescribed service condition.
4022-XXX
Laser
Der Drucker erfüllt gemäß amtlicher Bestätigung der USA die Anforderungen der
Bestimmung DHHS (Department of Health and Human Se r v ices) 21 CFR Teil J für
Laserprodukte der Klasse I (1). In anderen Ländern gilt der Drucker als Laserprodukt der
Klasse I, der die Anforderungen der IEC (International Electrotechnical Commission)
60825-1 gemäß amtlicher Bestätigung erfüllt.
Laserprodukte der Klasse I gelten als unschädlich. Im Inneren des Druckers befindet sich
ein Laser der Klasse IIIb (3b), bei dem es sich um einen Galliumarsenlaser mit 5 Milliwatt
handelt, der Wellen der Länge 770-795 Nanometer ausstrahlt. Das Lasersystem und der
Drucker sind so konzipiert, daß im Normalbetrieb, bei der Wartung durch den Benutzer
oder bei ordnungsgemäßer Wartung durch den Kundendienst Laserbestrahlung, die die
Klasse I übersteigen würde, Menschen keinesfalls erreicht.
Avis relatif à l’utilisation de laser
Pour les Etats-Unis : cette imprimante est certifiée conforme aux provisions DHHS 21
CFR alinéa J concernant les produits laser de Classe I (1). Pour les autres pays : cette
imprimante répond aux normes IEC 60825-1 relatives aux produits laser de Classe I.
Les produits laser de Classe I sont considérés comme des produits non dangereux.
Cette imprimante est équipée d’un laser de Classe IIIb (3b) (arséniure de gallium d’une
puissance nominale de 5 milliwatts) émettant sur des longueurs d’onde comprises entre
770 et 795 nanomètres. L’imprimante et son système laser sont conçus pour impossible,
dans des conditions normales d’utilisation, d’entretien par l’utilisateur ou de révision,
l’exposition à des rayonnements laser supérieurs à des rayonnements de Classe I .
Laser Notices xi
4022-XXX
Avvertenze sui prodotti laser
Questa stampante è certificata negli Stati Uniti per essere conforme ai requisiti del DHHS
21 CFR Sottocapitolo J per i prodotti laser di classe 1 ed è certificata negli altri Paesi
come prodotto laser di classe 1 conforme ai requisiti della norma CEI 60825-1.
I prodotti laser di classe non sono considerati pericolosi. La stampante contiene al suo
interno un laser di classe IIIb (3b) all’arseniuro di gallio della potenza di 5mW che opera
sulla lun gh ez z a d’onda compresa tra 770 e 795 nanometri. Il sistema laser e la
stampante sono stati progettati in modo tale che le persone a contatto con la stampante,
durante il normale funzionamento, le operazioni di servizio o quelle di assistenza tecnica,
non ricevano radiazioni laser superiori al livello della classe 1.
Avisos sobre el láser
Se certifica que, en los EE.UU., esta impresora cumple los requisitos para los productos
láser de Clase I (1) establecidos en el subcapítulo J de la norma CFR 21 del DHHS
(Departamento de Sa nidad y Ser vi cios ) y, en los demás países, reúne todas las
condiciones expuestas en la norma IEC 60825-1 para productos láser de Clase I (1).
Los productos láser de Clase I no se consideran peligrosos. La impresora contiene en su
interior un láser de Clase IIIb (3b) de arseniuro de galio de funcionamiento nominal a 5
milivatios en una longitud de onda de 770 a 795 nanómetros. El sistema láser y la
impresora están diseñados de forma que ningun a persona pueda verse afectada por
ningún tipo de radiación láser superior al nivel de la Clase I durante su uso normal, el
mantenimiento realizado por el usuario o cualquier otra situación de servicio técnico.
Declaração sobre La ser
A impressora está certificada nos E.U.A. em conformidade com os requisitos da
regulamentação DHHS 21 CFR Subcapítulo J para a Classe I (1) de produtos laser. Em
outros locais, está certificada como um produto laser da Classe I, em conformidade com
os requisitos da norma IEC 60825-1.
Os produtos laser da Classe I não são considerados perigosos. Internamente, a
impressora contém um produto laser da Classe IIIb (3b), designado laser de arseneto de
potássio, de 5 milliwatts ,operando numa faixa de comprimento de onda entre 770 e 795
nanómetros. O sistema e a impressora laser foram concebidos de forma a nunca existir
qualquer possiblidade de acesso humano a radiação laser superior a um nível de Classe
I durante a operação normal, a manutenção feita pelo utilizador ou condições de
assistência pr escritas.
xii Service Manual
4022-XXX
Laserinformatie
De printer voldoet aan de eisen die gesteld worden aan een laserprodukt van klasse I.
Voor de Verenigde Staten zijn deze eisen vastgelegd in DHHS 21 CFR Subchapter J,
voor andere landen in IEC 60825-1.
Laserprodukten van klasse I worden niet als ongevaarlijk aangemerkt. De printer is
voorzien van een laser van klasse IIIb (3b), dat wil zeggen een gallium arsenide-laser van
5 milliwatt met een golflengte van 770-795 nanometer. Het lasergedeelte en de printer
zijn zo ontworpen dat bij normaal gebruik , bij onderhoud of reparatie conform de
voorschriften, nooit blootstelling mogelijk is aan laserstraling boven een niveau zoals
voorgeschrev en is voor klasse 1.
Lasermeddelelse
Printeren er godkendt som et Klasse I-laserprodukt, i overenstemmelse med kravene i
IEC 60825 -1 .
Klasse I-laserprodukter betragtes ikke som farlige. Printeren indeholder internt en Klasse
IIIB (3b)- las e r, der nom ine lt er en 5 milli watt ga lliumars e nid las e r, som ar b ejd er på
bølgelængdeområdet 770-795 nanom eter. Lasersystemet og printeren er udformet
således, at mennesker aldrig udsættes for en laserstråling over Klasse I-niveau ved
normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser.
Huomautu s las er laittees ta
Tämä kirjoitin on Yhdysvalloissa luokan I (1) l aserlaitteiden DHHS 21 CFR Subchapter J määrityksen mukainen ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen
mukainen.
Luokan I laserlaitteiden ei katsota olevan vaar allisia käyttäjälle . Kir joittimessa on sisäinen
luokan IIIb (3b) 5 milliwatin gallium ar se nidil as er, joka toimii aaltoaluee lla 770 - 79 5
nanometriä. Laserjärjestelmä ja kirjoitin on suunniteltu siten, että käyttäjä ei altistu luokan
I määrityksiä voimakkaammalle säteilylle kirjoittimen normaalin toiminnan, käyttäjän
tekemien huoltotoimien tai muiden huoltotoimien yhteydessä.
VARO! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle
lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserst r ålning när denna del är öppnad och spärren är urkopplad.
Betra k ta e j s trålen.
Laser Notices xiii
4022-XXX
Laser-notis
Laser-melding
Denna skrivare är i USA certifierad att motsvara kraven i DHHS 21 CFR, underparagraf J
för laserprodukter av Klass I (1). I andra länder uppfyller skrivaren kraven för
laserprodukter av Klass I enligt kraven i IEC 60825-1.
Laserprodukter i Klass I anses ej hälsovådliga. Skrivaren har en inbyggd laser av Klass
IIIb (3b) som består av en laserenhet av gallium-arsenid på 5 milliwatt som arbetar i
våglängdsområdet 770-795 nanometer. Lasersystemet och skrivaren är utformade så att
det aldrig finns risk för att någon person utsätts för laserstrålning över Klass I-nivå vid
normal användning, underhåll som utförs av användaren eller annan föreskriven
serviceåtgärd.
Skriveren er godkjent i USA etter kravene i DHHS 21 CFR, underkapittel J, for klasse I (1)
laserprodukter, og er i andre land godkjent som et Klasse I-laserprodukt i samsvar med
kravene i IEC 60825-1.
Klasse I-laserprodukte r er ik ke å betrakte som farlige. Skriveren inneholder internt en
klasse IIIb (3b)-laser, som består av en gallium-arsenlaserenhet som avgir stråling i
bølgelengdeområdet 770-795 nanometer. Lasersystemet og skriveren er utformet slik at
personer aldri utsettes for laserstråling ut ov er klasse I-nivå under vanlig bruk, vedlikehold
som utføres av brukeren, eller foreskrevne serviceoperasjoner.
Avís sobre el Làser
Segons ha estat certificat als Estats Units, aquesta impressora compleix els requisits de
DHHS 21 CFR, apartat J, pels productes làser de classe I (1), i segons ha estat certificat
en altres llocs, és un producte làser de classe I que compleix els requisits d’IEC 60825-1.
Els productes làser de classe I no es consideren perillosos. Aquesta impressora conté un
làser de classe IIIb (3b) d’arseniür de gal.li, nominalment de 5 mil.liwats, i funciona a la
regió de longitud d’ona de 770-795 nanòmetres. El sistema làser i la impressora han
sigut concebuts de manera que mai hi hagi exposició a la radiació làser per sobre d’un
nivell de classe I durant una operació normal, durant les tasques de manteniment
d’usuari ni durant els serveis que satisfacin les condicions prescrites.
xiv Service Manual
4022-XXX
Japanese Laser Notice
Chinese Las er Notice
Laser Notices xv
4022-XXX
Korean Laser Notice
xvi Service Manual
4022-XXX
Safety Information
• The safety of this product is based on testing and approvals of the original design
and specific components. The manufacturer is not responsible for saf ety in the e v ent
of use of unauthorized replacement parts.
• The maintenance information for this product has been prepared for use by a
professional service person and is not intended to be used by others.
• The re may be an increased risk of electric shock and personal injury duri ng
disassembly and servicing of this product. Professional service personnel should
understand this and take necessary precautions.
Consignes de Sécurité
• La sécurité de ce produit repose sur des tests et des
agréations portant sur sa conception d'origi ne et sur des composant s particuliers.
Le fabricant n'assume aucune responsabilité concernant la sécurité en cas
d'utilisat io n d e p ièc es de rec hange non agréées.
• Les consignes d'entretien et de réparation de ce produit s'adressent uniquement à
un personnel de maintenance qualifié.
• Le dém ont age et l'entretien de ce produit pouvant présenter certains risques
électriques, le personnel d'entretien qualifié devra prendre toutes les précautions
nécessaires.
Norme di sicurezza
• La sicurezza del prodotto si basa sui test e sull'approvazione del progetto originale e
dei componenti specifici. Il produttore non è responsabile per la sicurezza in caso di
sostituzione non autorizzata delle parti.
• Le informazioni riguardanti la manutenzione di questo prodotto sono indirizzate
soltanto al personale di assistenza autorizzato.
• Durante lo smonta ggio e la manutenzione di questo prodotto,
il rischio di subire scosse elettriche e danni alla persona è più elevato. Il personale di
assistenza autorizzato, deve, quindi, adottare le precauzioni necessarie.
Sicherheitshinweise
• Die Sicherheit dieses Produ kts bas ier t auf Tests und Zulassungen des
ursprünglichen Modells und bestimmter Bauteile. Bei Verwendung nicht
genehmigter Ersatzteile wird vom Hersteller keine Verantwortung oder Haftung für
die Sicherheit übernommen.
• Die Wartungs inform ationen für dieses Produkt sind ausschließlich für die
Verwendung durch einen Wartungsfachmann bestimmt.
• Während des Auseinandernehmens und der Wartung des Geräts besteht ein
zusätzliches Risiko eines elektrischen Schlags und körperlicher Verletzung. Das
zuständige Fachpersonal sollte entsprechende Vorsichtsmaßnahmen treffen.
Safety In fo rma tion xvii
4022-XXX
Pautas de Segu ridad
• La seguri dad de es te producto se basa en pru ebas y aproba ciones del diseño
original y componentes específicos. El fabricante no es responsable de la
seguridad en caso de uso de piezas de repuesto no autorizadas.
• La información sobre el mantenimiento de este producto está dirigida
exclusivamente al personal cualificado de mantenimiento.
• E xiste mayor riesgo de descarga eléctrica y de daños personales durante el
desmontaje y la reparación de la máquina. El personal cualificado debe ser
consciente de este peligro y tomar las precauciones necesarias.
Informações de Segurança
• A segurança deste produto baseia-se em testes e aprovações do modelo original e
de componentes específicos. O fabricante não é responsável pela segunrança, no
caso de uso de peças de su bstituição não autorizadas.
• As informações de segurança relativas a este produto destinam-se a profissionais
destes serviços e não devem ser utilizadas por outras pessoas.
• Risco de choques eléctricos e ferimentos graves durante a desmontagem e
manutenção deste produto. Os profissionais destes serviços devem estar avisados
deste facto e tomar os cuidados necessários.
Informació de Seguretat
• La seguret at d'aque st producte es basa en l'avaluació i aprovació del disseny
original i els components específics.
El fabricant no es fa responsable de les qüestions de
seguretat si s'utilitzen peces de recanvi no autoritzades.
• La informació pel manteniment d’aquest producte està orientada exclusivament a
professionals i no està destinada
a ningú que no ho sigui.
• El risc de xoc elèctric i de danys personals pot augmentar durant el procés de
desmuntatge i de servei d’aquest producte. El personal professional ha d’estar-ne
assabentat i prendre
les mesures convenients.
xviii Ser v ice M anual
4022-XXX
Safe ty In formation xix
4022-XXX
Preface
This manual contains maintenance procedures for service personnel only . It is divided
into the following chapters:
1. General Informa tion contains a general description of the printer and the
maintenance approach used to repair it. Special tools and test equipment are listed
in this chapter, as well as general environmental and safety instructions.
2. Diagnostic Information contains an error indicator table, symptom tables, and
service checks used to isolate failing field replaceable units (FRUs).
3. Diagnostic Aids contains tests and checks used to locate or repeat symptoms of
printer problems.
4. Re pair I nformation provides instructions for making printer adjustments and
removing and installing FRUs.
5. Connector Locations uses illustrations to identify the connector locations and test
points on the printer.
6. Prev enti ve Maintena nce contains the lubrication specifications and
recommendations to prevent problems.
7. Parts Catalog contains illustrations and part numbers for individual FRUs.
xx Service Manual
4022-XXX
1. General Information
The Lexmark™ W812 printe r is a mid-range mono laser printer available in two models:
• 4022-10 0 is a base model of the W812 with 16MB of standard memor y and US B/
parallel port connectors.
• 4022-110 is a network model of the W812 with 32 MB of standard memory and USB/
Ethernet 10BaseT/100 BaseT X network port connectors.
Product features include:
• A3 support
• 26 ppm
• Me mory expandable up to an additional 256MB
• Optional 250-sheet drawer
• Optional 500-sheet drawer
• Optional Unit
The product supports the following operating systems:
• Wind ows 95/98/Me
• Wind ows NT 4.0
• Wind ows 2000
• Wind ows XP
• Macintosh OS 8.6-9.x
• Macintosh OS X (10.1.2)
• UNIX/Linus
Maintenance Approach
The diagnostic information in this manual leads you to the correct field replaceable unit
(FRU) or part. Use the service error codes, user status messages, user error message,
service checks, and diagnostic aids to determine the printer problem and repair the
failure. After you complete the repair, perform tests as needed to verify the repair.
Tools Required
The removal and replacement procedures described in this manual require the following
tools and equipment:
• Flat-blade screwdriver
• #1 Phillips scr ewdriver
• #2 Phillips scr ewdriver
• Needl enose pliers
• Diago nal pliers
• Spring hook
• A nalog or digital multimeter
General Information 1-1
4022-XXX
Acronyms
BCR Bias Charge Roll
CM Charging and Metering
CSU Customer Setu p
DIMM Dual Inline Memory Module
DRAM Dynamic Random Access Memor y
EDO Enhanced Data Out
EP Electrophotographic Process
EPROM Erasable Programmable Read-Only Memory
ESD Ele ctrostatic Discharge
FG Frame Ground
FRU Field Replaceable Unit
GB Gigabyte
HVPS High Voltage Power Supply
LASER Light Amplification by Stimulated Emission of Radiation
LCD Liquid Crystal Display
LD Laser Diod e
LED L ight-Emitting Diode
LVPS Low Voltage Power Supply
MROM Masked Read Only Memor y
NVR AM Nonvo latile Random A ccess Mem or y
OEM Original Equipment Manufacturer
PC Photoconductor
POR Power-On Reset
POST Power-On Self Test
RIP Raster Imaging Processor
ROM Read-Only Memory
SDRAM Synchronous Dynamic Random Access Memory
SRAM Static Random Access Memory
UPR Used Parts Return
V ac Volts alternating current
V dc Volts direct current
TTL Transistor-Transistor Logic
1-2 Service Manual
4022-XXX
Preparing for shipping
When a printer is first installed, two transfer roll stops (bright orange in color) are removed
before the toner cartridge can be installed. These transfer roll stops prevent roll from
coming loose during shipping.
Whenever the printer is to be shipped, reinstall the stops.
Transfer Roll Stop
Left
Right
Transfer Roll Stop
Transfer Roll Assembly Transfer Roll Assembly
General Information 1-3
4022-XXX
Principl es of Oper at io n
Overview of Print Process
The printer provides a electrophotographic process function to print image on paper with
video signals sent from the controller board to the engine board. The electrophotographic
process consists of the following seven steps.
1. Charge - Equally assigns negative charge on the drum surface by the bias charge
roll.
2. Exposure - The laser scanner scans the drum surface and generates an invisible
electrostatic latent image on the drum surface using super-fine laser beams
modulated according to signals sent from the controller.
3. Development - Draws toner toward an electrostatic latent image on the drum
surface and creates a visible toner image.
4. Transcription - Transcribes a toner image from the dr um surface to paper.
5. Exfoliation - Cast off paper from the drum surface by partially neutralizing charge on
paper.
6. Fusing - Permanently fuses a toner image by heat and pressure.
7. Cleaning - Eliminates the remaining toner from the drum surface.
1. Charge
Paper Enters
2. Exposure
3. Development
Xerographic cycle
Cycle repeats for the next print
4. Transfer
5. Detack
7. Cleaning
6. Fusing
Paper Exits
Rotating the drum, the drum surface passes six steps (charge, exposure, development,
transcription, exfoliation, and cleaning), creates a toner image, and transcribes the
created image on paper. Paper passes three steps (transcription, exfoliation, and fusing)
by the paper transfer mechanism. When paper is positioned as shown in image, toner
image is transcribed from the drum surface to paper, and then fused.
1-4 Service Manual
4022-XXX
The illustrations show the major components directly related to the print process and
paper transfer.
Back-up
Roll
6
FUSING
Detack Saw
Transfer Roller
5
DETACK
4
TRANSFER
Hot Roll
Cleaning
Blade
7
Drum
Mag.Roll
Paper
CLEANING
BCR
1
CHARGE
2
EXPOSURE
CM Blade
3
DEVELOPMENT
Laser Beam
General Information 1-5
4022-XXX
Pressure
Roll
Drum
Transfer
Roller
Mag. Roll
Fuser Assembly Heat Roll
Toner
Cartridge
Front
Printhead
1-6 Service Manual
4022-XXX
In the exposure step, thin laser beam scans the drum surface which was negatively
charged in the charging step of the previous process. The laser beam emitted by the laser
diode of the printhead scans from end to end of the drum through the rotating polyhedron
mirror (Polygon Mirror: 6 or 12 sides) and lens.
Radiation from the laser beam is adjusted according to the video signal from the
controller.
The laser beam irradiated to the drum excites the electron going toward the conductor
and generates a pair of electronic holes in the light transmission layer. As the electronic
holes move to the surface of the light transmission layer when the electron moves toward
the body in the drum along the electric field, the negative charge at that part decreases
and invisible electrostatic latent image is generated.
Toner is absorbed to the electrostatic latent image and developed.
Toner absorbe d to the drum is attracted by the positive electric charge supplied by
Transfer Roller and transcribed on the paper and the drum goes to the separating and
cleaning process.
In the cleaning step, residual toner is removed from the drum surface as the surface is
prepared for the next cycle.
The toner is scraped off the drum surface by the cleaning blade.
Note: The toner rubbed off in the cleaning step is collected in the recovery toner
compartment separated from the unused toner. The transcription ratio is 90% or more,
but it varies depending on the image cover range and environment conditions such as the
temperature and humidity. The used toner cannot be reused.
Note: At the starting time for each print process, the entire drum surface is scanned with
laser beams, and the charge remaining on the drum surface from the preceding print step
is remo ved complete ly.
Note: At the starting and ending times of the continuous print process, the negative highvoltage is applied to the Transfer Roller. If residual toner is on the Transfer Roller surface
in the preceding print step, it is returned onto the drum surface to clean the Transfer
Roller surface.
General Information 1-7
4022-XXX
Paper Transfer
Paper is supplied from tray 1 or chute MPF, and carried to the printer along the paper
route shown in the illustration.
The optional duplex assembly has an individual motor (bracket assembly motor duplex) to
transfer paper.
Tray 1
Roll Assembly Tray 1
Roll Pinch Registration (lower)
Roll Pinch Registration (upper)
Chute Assembly Transfer
MPF
Roll Assembly MPF
Roll Registration Metal
Roll Registration Rubber
Transfer Roller
Drum
Toner Cartridge
Fuser Assembly
1-8 Service Manual
Heat Roll
Pressure Roll
Roll Assembly Decurler
Roll Pinch
Roll Assembly Exit
Roll Pinch
4022-XXX
The illustration below shows the major components directly related to the paper route and
paper transfer. See "Options" for the major components related to the paper route and
paper transfer when the optional devices (Tray 2, Tray 3, and Duplex) are attached to the
printer.
Exit Sensor
Pressure
Roll
Drum
Transfer
Roller
Roll
Registration
Metal
Roll
Registration
Rubber
Roll Pinch Exit
Sensor
Registration
Exit Roll
Roll Assembly
Tray 1
Heat Roll
Front
Roll Assembly MPF
Generating Print Image
The printers attached to the network, the network interface card (NIC) of the printer
connected to network receives packet signals from a network client or server in a bit
stream, and decomposes the received packet signals into a data format for the layer
where data is sent to the controller. The controller processes the data sent from the NIC
in the same way as of the data received from the host computer through a parallel port.
Data received from the NIC or parallel port is called host data.
The controller board buffers host data in the lustered bit image or converts host data of
the page description language (PDL) into the lustered bit image data. The controller
board sends the lustered bit image data to the engine board line by line each time laser
beams are scanned.
The signal that transfers image data (/VDO signal) is converted into an LVDS signal by
the engine board, and sent to the printhead as a P.DATA+P.DATA signal. The printhead
General Information 1-9
4022-XXX
converts the signal into laser beams, and radiated as super fine laser beams. The laser
beams are turned on and off according to a video signal. Laser beams, that are emitted
from the surface of the rotating polygon mirror, are collectively irradiated on the drum
surface of the EP cartridge. An electrostatic latent image is then generated on the drum
surface.
Transmissi on of Driving Power
The driving power is generated by the Motor Assembly (component of the Main Drive
Assembly), and transferred to the printer components, that requires the mechanical
driving power, through the gear and gear train in the Main Drive Assembly.
As shown in the following illustrations, the driving power is distributed to the toner
cartridge, chute assembly transfer, Roll Assembly MPF, Roll assembly tray 1, optional
feeder, and fuser assembly through the gear in the drive assembly.
The driving power transmitted to the chute assembly transfer drives the roll registration
metal and roll registration rubber. The driving power transmitted to the toner cartridge
drives the drum, and it is t ransmitted t o t he Transfer Rol ler of the chute assembly transf er.
The driving power transmitted to the fuser assembly drives the heat roll, and it is further
transmitted to the roll assembly exit by the gear decurler.
1-10 Service Manual
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