Lexmark W820, X820e, X830e, X832e, 4025-XXX Service Manual
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LexmarkTM W820, X820e, X830e, X832e
Printers
4025-XXX
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.
Edition: February 2005
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 allo w dis cl aimer of express or
implied warr anties in certain transacti ons; 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 will be incorporated in later editions. Improvements or changes in the products or the
programs described may be made at any time.
Comments may be addressed to Lexmark Internation al, Inc., Department D22A/032-2, 740 West New Circle Road,
Lexington, Kentuc ky 40550, U.S.A or e-mail at ServiceInfoAndTraining@Lexmark.com. Lexm ark may use or distribute an y
of the inf ormati on you supply in any way it believes appropriate without incurring any obligation to you. You can purchase
additional copies of publicati ons related to this product by calling 1-800-553-9727. In other countries, contact your point of
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Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States
and/or other cou ntri es.
Pos tScri pt is a registered trademark of Adobe Systems Incorporated.
Other trademarks are the property of their respective owners.
©
Copyright Lexmark International, Inc. 2001, 2005.
All rights reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
This software and documentation are provided with RESTRICTED RIGHTS. Use, duplicatio n or dis closure by the
Government is subject to restrictions as set forth in subparagraph (c)(1) (i i) of the Rights in Technical Data and Computer
Software cl ause at DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc., Lexington, KY
U.S .A. P/N 12G9449
iii
4025-XXX
Table of Contents
Notices and Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Laser Advisory and Caution Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Class 1 Laser Statement Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x
Laser Not ices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Safe ty In fo rmatio n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Maintena n c e A pproach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Tools Required For Servic e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Serial Number Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Symbols Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Power Supply and Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Mechanical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Laser Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fuser Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Safety Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Caution Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Service Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Printer Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Schematic Diagram of Printer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Printer Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Power Supply Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Electrical Safety Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Printer Con trol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Control Functions of the Machine Control Unit (MCU) . . . . . . . . . . . . . . . . . . 1-24
Mechanical Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
Mechanical Drive Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
Printer Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
Paper Path Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
Paper Path Mechanical Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
Paper Path Component Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-45
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