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ColorJetprinter™1020
4078-00X
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LexmarkandLexmarkwithdiamond
designaretrademarksofLexmark
International,Inc.,registeredinthe
UnitedStatesand/orothercountries.
4078-00X
Second Edition (July, 1996)
The following paragraph does not apply to the United Kingdom or 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 warranties 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 will be incorporated in later
editions of the publication. Improvements or changes in the products or the programs
described in this publication may be made at any time. Publications are not stocked at the
address given below; requests for publications should be made to your point of purchase.
Comments may be addressed to Lexmark International, Inc., Department D22A/035-3, 740
New Circle Road, Lexington, Kentucky 40550, U.S.A. Lexmark may use or distribute any of
the information you supply in any way it believes appropriate without incurring any obligation
to you.
Lexmark is a trademark of Lexmark International, Inc., registered in the United States and/or
other countries.
Color Jetprinter is a trademark of Lexmark International, Inc.
Other trademarks are the property of their respective owners.
© Copyright Lexmark International, Inc. 1995, 1996. All Rights Reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
This software and documentation are provided with RESTRICTED RIGHTS. Use,
duplication or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc.,
Lexington KY 40550.
4078-00X
Contents
1
Preface ................................................v
SafetyInformation..................................... v
GeneralInformation .................................... 1-1
PowerConsumption.................................. 1-1
Maintenance Approach ................................ 1-1
Abbreviations.................................... 1-2
UniqueToolsRequiredForService................... 1-2
DiagnosticInformation ................................. 2-1
Start.............................................. 2-1
ErrorIndicatorTable............................... 2-2
Power-On Self Test (POST) Sequence ................ 2-2
POSTSymptomTable............................. 2-3
SymptomTables ................................. 2-4
ServiceChecks...................................... 2-6
CarrierTransportServiceCheck..................... 2-6
EnvelopeFeedServiceCheck....................... 2-7
MaintenanceStationServiceCheck .................. 2-8
Paper Feed Service Check ......................... 2-9
Paper Path Service Check ......................... 2-11
ParallelPortServiceCheck........................ 2-12
PowerServiceCheck............................. 2-12
PrintQualityServiceCheck........................ 2-13
PrintQualityNotice............................... 2-15
DiagnosticAids ....................................... 3-1
EOFandHomePositionSensorsTest.................... 3-2
InitializeErrorLog.................................... 3-3
ParallelPortTest .................................... 3-4
PrintNVRAMContents................................ 3-5
ResetNVRAMtoEMEADefaults........................ 3-6
ResetNVRAMtoUSADefaults ......................... 3-7
TestPage.......................................... 3-8
iii
4078-00X
RepairInformation......................................4-1
Handling ESD-Sensitive Parts .......................... 4-1
Adjustments........................................ 4-2
RemovalProcedures................................. 4-2
ReleasingPlasticLatches.......................... 4-2
AccessCoverRemoval............................ 4-3
BaseAssemblyRemoval........................... 4-3
CarrierBeltRemoval.............................. 4-3
CarrierFrameAssemblyRemoval ................... 4-4
CarrierHomeSensorRemoval...................... 4-4
CarrierTransportMotorRemoval .................... 4-5
DriveTrainAssemblyRemoval...................... 4-5
FrontCoverRemoval ............................. 4-6
GutterPadRemoval .............................. 4-6
LargeFeedRollRemoval.......................... 4-7
Maintenance Station Assembly Removal .............. 4-7
Maintenance Wiper and Cap Removal ................ 4-7
MidFrameAssemblyRemoval...................... 4-8
Paper Feed Motor Removal ........................ 4-8
Power Supply Removal . . .......................... 4-8
Printhead Carrier Assembly Removal ................. 4-9
RearCoverRemoval............................. 4-10
Sheet Feeder Removal . . ......................... 4-11
SmallFeedRollAssemblyRemoval................. 4-11
SmallFeedRollBracketAssemblyRemoval .......... 4-12
SystemBoardRemoval........................... 4-13
ConnectorLocations....................................5-1
SystemBoardConnectors............................. 5-1
PreventiveMaintenance .................................6-1
LubricationSpecifications ............................. 6-1
PartsCatalog ..........................................7-1
HowToUseThisPartsCatalog......................... 7-1
Assembly1:Covers............................... 7-2
Assembly 2: Paper Feed / Carrier Transport / Maintenance 7-4
Assembly3:Electronics ........................... 7-6
Assembly3:Electronics(Continued).................. 7-8
Assembly4:Carrier.............................. 7-10
Assembly 5: Sheet Feeder ........................ 7-12
Index ................................................ X-1
iv
4078-002
Preface
2
This manual is divided into the following chapters:
1.
General Information
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 error indicator table, symptom
table, 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.
Repair Information
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.
Preventive Maintenance
contains the lubrication specifications
and recommendations to prevent problems.
7.
Parts Catalog
contains illustrations and part numbers for indi-
vidual FRUs.
Safety Information
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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.
•
There may be an increased risk of electric shock and
personal injury during disassembly and servicing of this
product. Professional service personnel should understand
this and take necessary precautions.
•
The safety features of some parts may not always be
obvious. Therefore, replacement parts must have the
identical or equivalent characteristics as the original parts.
Preface v
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