Lexmark E450dn Service Manual

• Table of contents

• Start diagnostics

Edition: September 26, 2006

Lexmark™ E450dn

4512-630

• Safety and notices

• Trademarks

•Index

Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.

4512-630

Edition: September 26, 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 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. Improvements 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 West New Circle Road,
Lexington, Kentucky 40550, U.S.A or e-mail at [e-mail]. Lexmark may use or distribute any
of the information you supply in any way it believes appropriate without incurring any obligation to you.

References in this publication to products, programs, or services do not imply that the manufacturer intends to make these
available in all countries in which it operates. Any reference to a product, program, or service is not intended to state or
imply that only that product, program, or service may be used. Any functionally equivalent product, program, or service that
does not infringe any existing intellectual property right may be used instead. Evaluation and verification of operation in
conjunction with other products, programs, or services, except those expressly designated by the manufacturer, are the
user’s responsibility.

Lexmark, Lexmark with diamond design, MarkNet and MarkVision are trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.

PictureGrade is a trademark of Lexmark International, Inc.
PCL® is a registered trademark of the Hewlett-Packard Company.
All other trademarks are the property of their respective owners.

© 2006 Lexmark International, Inc.

All rights reserved.

UNITED STATES GOVERNMENT RIGHTS

This software and any accompanying documentation provided under this agreement are commercial computer software
and documentation developed exclusively at private expense.

P/N 12G9709

4512-630

Table of contents

Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Notices and safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Laser notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Maintenance approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Overview of the operator panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Print quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Media trays and supply capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Connectivity and compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Types of print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Tips on preventing jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Diagnostics information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Symptom tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Service errors (9xx.xx’s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

User status and attendance messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Overview of the operator panel and menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Diagram of the printer menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Messages and error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

User attendance messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Cartridge error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Paper jam error codes (200-series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Service error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Symptom tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

POST symptom table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Printer symptom table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Service checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Controller card service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Cooling fan service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Cover interlock switch service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Dead machine service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

LVPS/HVPS service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Main motor service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Operator panel service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Paper feed service checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Paper jam error indication during POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Media picks during POST and/or continuously . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Media picks but stops halfway through the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Media never picks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Media occasionally mispicks or picks multiple sheets at once . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Media skews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Table of contents iii

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Media “trees,” wrinkles, stacks poorly, or curls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23

Parallel or USB port service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23

Print quality service checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24

Blank page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24

Black page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

Heavy background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

Partial blank image/white spots (no repeating pattern) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26

Variation in image density horizontally across page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26

Poor fusing of image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26

Light print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27

White or black lines or bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27

Toner on back of page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27

Solving print quality problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28

Printhead service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-31

Transfer roll service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-31

Diagnostic aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Accessing service menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Diagnostics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Entering Diagnostics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Available tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2

Exiting Diagnostics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

REGISTRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

Printer (printhead) alignment settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6

Quick Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9

PRINT TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

Input source tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

Print quality pages (Prt Quality Pgs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10

HARDWARE TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Panel Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Button Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

DRAM Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

Parallel Wrap tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

DUPLEX TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

Quick Test (duplex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

Top/Left Margin (duplex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13

Sensor Test (duplex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

Duplex Feed 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14

INPUT TRAY TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

Feed Tests (input tray) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

OUTPUT BIN TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

Feed Tests (output bins) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

Sensor Test (standard output bin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16

BASE SENSOR TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17

PRINTER SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Page Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Perm Page Count (permanent page count) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Engine Setting 1 through 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Model Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-18

Configuration ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

Edge to Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

Parallel strobe adjustment (Par x Strobe Adj) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19

EP SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

EP Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

Fuser Temperature (Fuser Temp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

Print Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-20

iv Service Manual

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Charge Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Gap Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

EVENT LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Display Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Print Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Clear Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

EXIT DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Configuration menu (CONFIG MENU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Entering Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Available menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Maintenance page count (Maint Cnt Value) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Maintenance page counter reset (Reset Maint Cnt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Print quality pages (Prt Quality Pgs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Panel Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

PPDS Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Demo Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Energy Conserve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

EVENT LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Paper Prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Env Prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Change Prompts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Reduced Curl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

USB Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Exit Config Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Repair information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Handling ESD-sensitive parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Removal procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Front access cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Left side cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Right side cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Rear cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Top cover removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Auto comp removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Auto comp clutch removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Auto comp drive shaft assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Bezel removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Controller card removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Cover open sensor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Developer drive coupling assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Duplex removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

Duplex gear drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

Fan removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

Flag removal (top cover right and left) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

Fuser removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

Fuser power cable removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24

Link developer drive and access door removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

LVPS/HVPS card assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26

Main motor drive removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28

Manual feed sensor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30

Media level indicator removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31

Narrow media sensor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33

Operator panel removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34

Paper exit guide assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35

Paper feed rollers (autocompensator tires) removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36

Paper input and duplex sensor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

Printhead removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38

Table of contents v

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Reversing solenoid removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-39

Toner level sensor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-39

Transfer roll removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-40

Tray 2 auto comp tire removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-41

Upper front frame group removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-42

Wear strip removal (tray 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-44

Wear strip removal (tray 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-44

Locations and connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Controller card connector pin values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Safety inspection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Lubrication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Maintenance kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

How to use this parts catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Assembly 1: Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Assembly 2: Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Assembly 3: Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Assembly 4: Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Assembly 5: Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-1

Part number index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-5

vi Service Manual

Notices and safety information

The following laser notice labels may be affixed to this printer.

Laser notice

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 system 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.

Laser

Der Drucker erfüllt gemäß amtlicher Bestätigung der USA die Anforderungen der Bestimmung DHHS
(Department of Health and Human Services) 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.

4512-630

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 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 .

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 lunghezza 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.

Notices and safety information vii

4512-630

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 Sanidad y Servicios) 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 ninguna 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 Laser

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 prescritas.

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
voorgeschreven 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)-laser, der
nominelt er en 5 milliwatt galliumarsenid laser, som arbejder på bølgelængdeområdet 770-795 nanometer.
Lasersystemet og printeren er udformet således, at mennesker aldrig udsættes for en laserstråling over Klasse
I-niveau ved normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser.

viii Service Manual

Laserilmoitus

Tämä tulostin on sertifioitu Yhdysvalloissa DHHS 21 CFR Subchapter J -standardin mukaiseksi luokan I (1) ­lasertuotteeksi ja muualla IEC 60825-1 -standardin mukaiseksi luokan I lasertuotteeksi.

Luokan I lasertuotteita ei pidetä haitallisina. Tulostimen sisällä on luokan IIIb (3b) laser, joka on nimellisteholtaan
5 mW:n galliumarsenidilaser ja toimii 770 - 795 nanometrin aallonpituuksilla. Laserjärjestelmä ja tulostin ovat
rakenteeltaan sellaisia, että käyttäjä ei joudu alttiiksi luokkaa 1 suuremmalle säteilylle normaalin käytön,
ylläpidon tai huollon aikana.

Huomautus laserlaitteesta

Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS 21 CFR Subchapter J -määrityksen mukainen
ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen mukainen.

Luokan I laserlaitteiden ei katsota olevan vaarallisia käyttäjälle. Kirjoittimessa on sisäinen luokan IIIb (3b) 5
milliwatin galliumarsenidilaser, joka toimii aaltoalueella 770 - 795 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.

4512-630

VARNING! Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen.

Laser-notis

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.

Laser-melding

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-laserprodukter er ikke 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 over klasse I-nivå under
vanlig bruk, vedlikehold som utføres av brukeren, eller foreskrevne serviceoperasjoner.

Notices and safety information ix

4512-630

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.

x Service Manual

4512-630

Notices and safety information xi

4512-630

xii Service Manual

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 safety in the event 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.

• 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.

• CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the

product where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.

Consignes de sécurité

• La sécurité de ce produit repose sur des tests et des

agréations portant sur sa conception d'origine et sur des composants particuliers. Le fabricant n'assume

aucune responsabilité concernant la sécurité en cas d'utilisation de pièces de rechange non agréées.

• Les consignes d'entretien et de réparation de ce produit s'adressent uniquement à un personnel de

maintenance qualifié.

• Le démontage et l'entretien de ce produit pouvant présenter certains risques électriques, le personnel

d'entretien qualifié devra prendre toutes les précautions nécessaires.

• ATTENTIO N : Ce symbole indique la présence d'une tension dangereuse dans la partie du

produit sur laquelle vous travaillez. Débranchez le produit avant de commencer ou faites preuve
de vigilance si l'exécution de la tâche exige que le produit reste sous tension.

4512-630

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 smontaggio 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.

• ATTENZIONE: Questo simbolo indica la presenza di tensione pericolosa nell'area del prodotto.

Scollegare il prodotto prima di iniziare o usare cautela se il prodotto deve essere alimentato per
eseguire l'intervento.

Safety information -xiii

4512-630

Sicherheitshinweise

• Die Sicherheit dieses Produkts basiert 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 Wartungsinformationen 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.

• ACHTUNG: Dieses Symbol weist auf eine gefährliche elektrische Spannung hin, die in diesem

Bereich des Produkts auftreten kann. Ziehen Sie vor den Arbeiten am Gerät den Netzstecker des
Geräts, bzw. arbeiten Sie mit großer Vorsicht, wenn das Produkt für die Ausführung der Arbeiten
an den Strom angeschlossen sein muß.

Pautas de Seguridad

• La seguridad de este producto se basa en pruebas y aprobaciones 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.

• Existe 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.

• PRECAUCIÓN: este símbolo indica que el voltaje de la parte del equipo con la que está

trabajando es peligroso. Antes de empezar, desenchufe el equipo o tenga cuidado si, para
trabajar con él, debe conectarlo.

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 substituição
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.

• CUIDADO: Quando vir este símbolo, existe a possível presença de uma potencial tensão

perigosa na zona do produto em que está a trabalhar. Antes de começar, desligue o produto da
tomada eléctrica ou seja cuidadoso caso o produto tenha de estar ligado à corrente eléctrica para
realizar a tarefa necessária.

-xiv Service Manual

Informació de Seguretat

• La seguretat d'aquest 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.

• PRECAUCIÓ: aquest símbol indica que el voltatge de la part de l'equip amb la qual esteu

treballant és perillós. Abans de començar, desendolleu l'equip o extremeu les precaucions si, per
treballar amb l'equip, l'heu de connectar.

4512-630

Safety information -xv

4512-630

Preface

This manual contains maintenance procedures for service personnel. It is divided into the following chapters:

1. General information contains a general description of the printer and the maintenance approach used to

2. Diagnostic information contains an error indicator table, symptom tables, and service checks used to

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

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

7. Parts catalog contains illustrations and part numbers for individual FRUs.

Definitions

repair it. Special tools and test equipment are, as well as general environmental and safety instructions.

isolate failing field replaceable units (FRUs).

FRUs.

problems.

Appendix A contains service tips and information.
Appendix B contains representative print samples.

Note: A note provides additional information.
Warning: A warning identifies something that might damage the product hardware or software.

CAUTION: A caution identifies something that might cause a servicer harm.

CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the

product where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.

-xvi Service Manual

1. General information

The Lexmark™ E450dn is a monochrome laser printer designed for single users or small workgroups.

This book contains information on E450dn. For more information on E250d and E250dn, see the
4512-220, -230 service manual.
manual.

minute on letter-size media (29 ppm on A4, 25ppm on legal).

4512-630

For information on E350d and 352dn, see the 4512-420, 430 service

Maintenance approach

The diagnostic information in this manual leads to the correct field replaceable unit (FRU) or part. Use the error
code charts, symptom index, and service checks to determine the symptom and repair the failure. See

“Diagnostic information” on page 2-1 for more information. See “Repair information” on page 4-1 to help

identify parts. After completing the repair, perform tests as needed to verify the repair.

General information 1-1

4512-630

Overview of the operator panel

The control panel consists of these items:

• A 4-line, liquid crystal display (LCD) that can show both graphics and text

• Eight buttons: Back, Menu, Stop, Select ( ), , , , and

• Indicator light

A label located on the inside front door shows the control panel buttons in your language. An additional
translated label is included in the printer box.

Back Menu Stop

Voltar
Zp t

ě Tilbake
Tilbage
Terug
Takaisin
Retour
Zurück
Vissza
Indietro

Wró
Hзд

Atrás
Bakåt

Geri

aa

Menu
Nabídka
Menu

ć

Menu
Valikko
Menu
Menü
Menü
Menu

Meny
Menu

Меню

Menú
Meny

Menü

Parar
Stop
Stop
Stop
Seis
Stop
Stopp
Leállítás
Stop

Stopp
Stop
Стоп

Parar
Stopp

Durdur

1-2 Service Manual

Specifications

Memory

4512-630

Item

Standard DRAM 64MB

Optional SDRAM 32MB ✔

Optional SDRAM 64MB ✔

Optional SDRAM 128MB ✔

Optional SDRAM 256MB ✔

Maximum DRAM 320MB

Optional flash memory 32MB 1

Optional font cards (DBCS) 1

4512-630

Lexmark E450dn

Print quality

Resolution

1200 Image quality ¹ ✔

2400 Image quality ² ✔

4512-630

Lexmark E450dn

1200 x 1200 dpi ³ ✔

600 x 600 dpi ✔

300 x 300 dpi

¹ 1200 Image quality defined as 600 dpi with 2 bit IET (image enhancement technology) default mode for all models

² 2400 Image quality defined as 600 and 4 bit IET

³ True 1200 dpi at ½ rated speed.

4

Although the printer supports the 300 dpi resolution, it doesn’t support a 300 dpi driver.

4

✔

General information 1-3

4512-630

Media trays and supply capacity

Item

Available input trays

250-sheet tray ✔

550-sheet option drawer ✔

550-sheet tray optional

Dust cover optional

Toner and photoconductor

Toner cartridge 3,000 standard pages ¹

High toner cartridge n/a

Photoconductor kit Up to 30,000

¹ Declared value in accordance with ISO/IEC 19752

² Based on approximately 5% coverage; actual yield may vary

4512-630

Lexmark E450dn

²

1-4 Service Manual

Connectivity and compatibility

4512-630

Item

Data stream emulations

PCL 6 ✔

PostScript Level III ✔

Host Based Printing (HBP)/GDI Version 1 n/a

Host Based Printing (HBP)/GDI Version 2 ✔

PPDS ✔

HTML n/a

PDF (version 1.5) ✔

Compatibility Windows/Macintosh/Linux ¹

Standard local connections

Parallel (IEE 1284 bidirectional) ✔

USB* ✔

Standard network connections

Ethernet (10/100 Base TX)

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Lexmark E450dn

Optional local connections

External print server support ✔

Option slots

Memory slots (100-pin DIMM) 1

Flash memory / option card 2 ²

* The E450n product is a USB 2.0 certified device supporting high-speed (480MB/sec.) data transfer.
¹ Linux support for E450dn model is utilizing the PCL data stream.

² Only one slot active for flash memory or font card

General information 1-5

4512-630

Types of print media

Ensure trays are properly loaded. Never mix media types within a tray.

Source Sizes Types Weight

Input tray 1
(250-sheet tray)

A4, A5, A6³, JIS, B5,
letter, legal,
executive, folio,

Paper, labels¹,
transparencies

60–90 g/m
(16–24 lb)

6

2

Input capacity
(sheets)²

250 paper
50 labels¹
50 transparencies

statement

2nd Drawer option
(550-sheet only—

E352dn only)

Manual feed input

A4, letter, legal, A5,
JIS, B5, executive,
folio, statement

7

A4, A5, A6³, JIS, B5,
letter, legal,
executive, folio,

Paper, labels¹,
transparencies

Paper, labels¹,
transparencies, card
stock,4 envelopes

5

60–90 g/m
(16–24 lb)

60–163 g/m
(16–43 lb)

2

550 paper (20 lb)
50 labels¹
50 transparencies

2

1 sheet (all medias)

statement

5

Envelopes

:

monarch (7 ¾), 9,
Com-10’, C5, B5, DL

Minimum feed size:
76 X 127mm

Universal (max)
paper:
216 X 357mm

¹ Single sided paper labels are supported for the occasional use of less than 20 pages per month. Labels such as vinyl
labels, pharmacy labels or dual-sided labels are not supported.

² For 20 lb print material, unless otherwise noted.
³ A6 long grain media support/short grain A6 not supported

4

Card stock up to 90# index. Designed to exit rear door. Short grain is recommended.

5

20 lb envelopes are recommended
Wrinkling may also occur on the front side, but away from address or return address areas. Slight wrinkling (nit in
address areas) is permitted on 24# envelopes. Use envelopes that lay flat when individually placed on a table facedown.
The distance of any edge or corner from the table should be less than 3 mm.

6

This refers to paper only. Treeing may occur on 16# paper.

7

Input using manual feeder is reduced to 1/2 speed

1-6 Service Manual

Tips on preventing jams

Paper path

4512-630

Most paper jams can be avoided by correctly loading paper and specialty media in the printer.
The following hints can help prevent paper jams:

• Do not load wrinkled, creased, or damp media.

• Never mix media types within a tray.

• Flex, fan, and straighten the media stack before loading it.

Note: Make sure the media stack is below the maximum media fill indicators on the 250-sheet tray before

pushing the tray into the printer.

• Push all trays snugly into the printer after loading them.

• Make sure paper guides are positioned before loading the paper or specialty media.

• Do not remove trays while a job is printing. Wait for a Load Paper light sequence.

• Before loading transparencies, fan the stack to prevent sheets from sticking together.

• Do not use envelopes that:

General information 1-7

4512-630

Tools

– Have excessive curl
– Are stuck together
– Are damaged in any way
– Contain windows, holes, perforations, cutouts, or embossments
– Have metal clasps, string ties, or metal folding bars
– Have postage stamps attached
– Have any exposed adhesive when the flap is in the sealed position

Use only recommended media. Refer to the Card Stock & Label Guide available on the Lexmark Web site
at www.lexmark.com for more information about which media provides optimum results for the current
printing environment.

The removal and adjustment procedures require the following tools and equipment:

• Spring hook

• Needle nose pliers

• Volt-ohmmeter

• #1 and #2 Phillips screwdriver

• Slotted screwdriver

• Flashlight

1-8 Service Manual

Acronyms

ACM Autocompensator Mechanism (or paper feed)
ASIC Application Specific Integrated Circuit
CBM Complete Bill Of Material
CRC Cyclic Redundancy Check
DIMM Dual In-Line Memory Module
EEPROM Erasable Electrically Programmable Read-Only

ENA External Network Adapter
FRU Field Replaceable Unit
HBP Host Based Printing
HVPS High Voltage Power Supply
LCD Liquid Crystal Diode
LED Light Emitting Diode
LVPS Low Voltage Power Supply
NVRAM Nonvolatile Random Access Memory
PC Photoconductor
PCL Printer Control Language
POR Power-On Reset
POST Power-On Self Test
PPDS Personal Printer Data Stream
PRC People’s Republic of China
PSO Participating Standards Organization
RIP Raster Image Processor
TAR Toner Add Roll
SDR Synchronous Dynamic RAM
USB Universal Serial Bus
V ac Volts alternating current
V dc Volts direct current

4512-630

Memory

General information 1-9

4512-630

1-10 Service Manual

2. Diagnostics information

Start

CAUTION: Unplug power from the printer before connecting or disconnecting any cable,

assembly, or electronic card. This is a precaution for personal safety and to prevent damage to the
printer.

Use the service error code, user status message, user error message, symptom table, service checks, and
diagnostic aids in this chapter to determine the corrective action necessary to repair a malfunctioning printer.
They will lead you to solutions or service checks, including use of various tests.

Symptom tables

If your machine completes the “Power–On Self Test (POST) sequence” on page 2-1 without an error and you
have a symptom, go to “Messages and error codes” on page 2-5. Locate your symptom, and take the
appropriate action.

Service errors (9xx.xx’s)

4512-630

If a service error code appears while you are working on the machine, go to “Messages and error codes” on

page 2-5, and take the indicated action for that error.

Service error codes are indicated by a three-digit error code followed by a period and additional numbers in the
format XXX.YY. In most cases, five digits are shown.

User status and attendance messages

User status messages provide the user with information on the current status of the printer. Ready displays

•

on the first line of the display unless invoked, and then Power Saver displays. If a user status message is
displayed, go to “Messages and error codes” on page 2-5.

• User attendance messages are indicated by a two- or three-digit error code that provides the user with

information that explains a problem with a print cartridge, paper jam, option, port, and so on. If a user error
message displays, go to “User attendance messages” on page 2-5 and “Paper jam error codes (200-

series)” on page 2-8.

Power–On Self Test (POST) sequence

The following is an example of the events that occur during the POR sequence when the printer is turned on.

1. Diamonds are displayed on the operator panel.

2. While code is being loaded into DRAM, dots scroll across the operator panel.

3. A screen is displayed with the memory and processor speed. A typical example of this message is:

*64MB

4. Performing Self Test is displayed.

5. Busy is displayed.

6. Close Door will be displayed if the cover is open.

7. Any cartridge errors, such as Defective Cartridge, are displayed.

8. Applicable maintenance messages are displayed.

9. Applicable toner low messages are displayed.

10. The printer displays Ready.

Diagnostics information 2-1

4512-630

Overview of the operator panel and menus

The operator panel on your printer is a 4-line, back-lit, grayscale display that can show both graphics and text.
The Back, Menu, and Stop buttons are located to the left of the display, the navigation buttons are located
below the display, and the numeric pad is located to the right of the display.

Back

Menu

Stop

Indicator light

LCD

Select

Navigation buttons

The use of the buttons and the layout of the display panel are described in the following table.

Operator panel

Button Function

Press the Back button to return to the last screen you viewed.

Back

Menu

Stop

Note: Changes made on the screen will not be applied if you press the Back

button.
Press the Menu button to open the menu index.

Note: The printer must be in the Ready state to access the menu index. A
message indicating the menus are unavailable will appear if the printer is not
ready.

Press Stop to stop the mechanical operation of the printer. After pressing Stop,
the message Stopping is displayed. When the printer has stopped, the status
line in the operator panel will show Stopped, and a list of options will appear.

2-2 Service Manual

Operator panel (Continued)

Button Function

Navigation buttons

Display panel

The display panel shows messages and graphics describing the current state of
the printer and indicating possible printer problems you must resolve.

The top line of the display is the header line. If applicable, it will contain the
graphic indicating the Back button can be used. It will also display the current
status, and the Supplies (Warnings) status. If multiple warnings are present,
each warning will be separated by a comma.

The other three lines of the display are the body of the screen. This is where you
view printer status, supplies messages, show-me screens, and make selections.

4512-630

The Up or Down buttons are used to move up and down lists.
When navigating through a list using the Up or Down button, the cursor

moves one line at a time. Pressing the Down button at the bottom of the
screen changes the screen to the next whole page.

The Left or Right buttons are used to move within a screen such as
moving from one menu index item to another. They are also used to
scroll through text that will not fit on the screen.

The Select button is used to initiate action on a selection. Press Select
when the cursor appears next to the selection you want such as
following a link, submitting a configuration item, or when you want to
start or cancel a job.

Diagnostics information 2-3

4512-630

Diagram of the printer menus

The diagram shows the menu index on the operator panel and the menus and items available under each menu.
Not all menus or selections will be available in all situations. These are accessed through the driver.

Paper Menu

Paper Source
Paper Size
Paper Type
Custom Types
Universal Setup
Substitute Size
Paper Texture
Paper Weight
Paper Loading

PostScript Menu

Print PS Error
Font Priority

Finishing Menu

Duplex
Duplex Bind
Copies
Blank Pages
Collation
Separator Sheets
Separator Source
Multipage Print
Multipage Order
Multipage View
Multipage Border

PCL Emul Menu

Font Source
Font Name
Point Size
Pitch
Symbol Set
Orientation
Lines per Page
A4 Width
Tray Renumber
Auto CR after LF
Auto LF after CR

Utilities Menu

Print Menus
Print Stats
Print Net Setup
Print Fonts
Print Directory
Factory Defaults
Format Flash
Defragment Flash
Hex Trace

Setup Menu

Eco-Mode
Quiet Mode
Printer Language
Power Saver
Resource Save
Print Timeout
Wait Timeout
Auto Continue
Jam Recovery
Page Protect
Display Language
Toner Alarm

Job Menu

Reset Printer

Quality Menu

Print Resolution
Toner Darkness
Small Font Enh.

PPDS Menu

Orientation
Lines per Page
Lines per Inch
Page Format
Character Set
Best Fit
Tray 1 Renumber
Auto CR after LF
Auto LF after CR

2-4 Service Manual

Parallel Menu

Std Parallel

Network Menu

Standard Network

USB Menu

Standard USB

Messages and error codes

User attendance messages

The printer control panel displays messages describing the current state of the printer and indicates possible
printer problems that must be resolved. This topic provides a list of all printer messages, explains what they
mean, and tells how to clear the messages.

The following table lists the messages in alphanumerical order. A message can also be located using the index.

User attendance messages

Message Action

Activating Demo Mode Wait for the message to clear.

Activating Menu Changes Wait for the message to clear.

Activating/Deactivating PPDS Wait for the message to clear.

Busy Wait for the message to clear, or cancel the print job.

Cancelling Job Wait for the message to clear.

4512-630

Change Cartridge Invalid Refill The printer has detected an unsupported refilled cartridge. Remove the

Close door Close the specified door to clear the message.

Deactivating Demo Mode Wait for the message to clear.

Defragmenting Flash DO NOT POWER
OFF

Disabling Menus Wait for the message to clear.

Enabling Menus Wait for the message to clear.

Flushing Buffer Wait for the message to clear.

Formatting Flash DO NOT POWER
OFF

Invalid Engine Code Download valid engine code to the printer.

Invalid Standard Network Code The code in an internal print server is not valid. The printer cannot receive

indicated print cartridge, and install a new one.

Warning: Do not turn the printer off while this message is displayed.
Wait for the message to clear.

Note: The printer settings cannot be changed from the control panel while
the menus are disabled.

Warning: Do not turn the printer off while this message is displayed.
Wait for the message to clear.

and process jobs until valid code is programmed into the internal print
server. Download valid code to the internal print server.

Note: The network code can be downloaded while this message is
displayed.

Load manual feeder with <Custom
Type>

Load manual feeder with <Custom
String>

Load manual feeder with <size>

Load manual feeder with <size>
<type>

• Load the specified media in the manual feed tray or multipurpose
feeder.

• To ignore the manual feed request and print on media already
installed in one of the input sources, press .
If the printer finds a tray that has media with the correct media type
and size, it feeds media from that tray. If the printer cannot find a
tray with the correct media type and size, it prints on whatever
media is installed in the default input source.

• Cancel the current job.

Diagnostics information 2-5

4512-630

User attendance messages (Continued)

Message Action

Load <src> with <Custom Type
Name>

Load <src> with <Custom String>

Load <src> <size>

Load <src> <type> <size>

Maintenance Replace the maintenance items and, if necessary, reset the printer

Menus Disabled The printer menus are disabled. The printer settings cannot be changed

Network A network interface is the active communication link.

Network Card Busy An internal print server (also called an internal network adapter or INA) is

Not Ready The printer is not ready to receive or process data. Someone pressed

Parallel A parallel interface is the active communication link.

Performing Self Test The printer is running the series of start-up tests it performs after it is

• Load the input source with the correct type and size media.

• Cancel the current job.

maintenance counter.

from the control panel.
Note: A job can still be canceled.
Contact a system support person.

being reset. Wait for the message to clear.

to take the printer offline. Press to make the printer ready to receive
jobs.

turned on. Wait for the message to clear.

Power Saver • Send a job to print.

• Press to warm the printer to normal operating temperature and
display the Ready message.

Printing Directory List The printer is processing or printing a directory of all files stored in flash

Printing Font List The printer is processing or printing a list of all available fonts for the

Printing Menu Settings The printer is processing or printing the menu settings page. Wait for the

Printing Device Statistics The printer is printing statistical information about the printer. Wait for the

Printing Quality Test Pages The printer is formatting and printing the Print Quality Test, which consists

Prog Engine Code
DO NOT POWER OFF

Program Flash
DO NOT POWER OFF

memory. Wait for the message to clear.

specified printer language. Wait for the message to clear.

message to clear.

message to clear.

of 4 pages. Page 1 contains a mixture of graphics and text, pages 2 and 3
contain only graphics, and page 4 is a blank page. If Duplex is turned on,
then the pages are duplexed; otherwise they are simplexed. Wait for the
message to clear.

The printer is programming new engine code. Wait for the message to
clear and the printer to reset.

Warning: Do not turn the printer off while this message is displayed.

The printer is storing resources, such as fonts or macros, in flash memory.
Wait for the message to clear.

Warning: Do not turn the printer off while this message is displayed.

2-6 Service Manual

User attendance messages (Continued)

Message Action

4512-630

Prog System Code
DO NOT POWER OFF

Ready Send a job to print.

Remove Paper Standard Bin The standard output bin is full.

Resetting Maint Cnt Valu The printer is resetting the counter that tracks wear on the fuser.

Resetting PC Cnt Value The printer is resetting the counter that tracks wear on the photoconductor.

Resetting the Printer Wait for the message to clear.

Res Reduced The printer is reducing the resolution of a page in the current job from 600

Restoring Factory Defaults Wait for the message to clear.

The printer is programming new system code. Wait for the message to
clear and the printer to reset.

Warning: Do not turn the printer off while this message is displayed.

dots per inch) dpi) to 300 dpi to prevent a 38 Memory Full error. Res
Reduced remains on the display while the job prints.

Note: When factory default setting are restored:

• All downloaded resources (fonts, macros, symbol sets) in the
printer memory are deleted.

• All menu settings return to the factory default except:

– The Display Language setting in the Setup Menu
– All settings in the Parallel Menu, Network Menu, and

USB Menu

Std Bin Full The standard bin is full.

Toner Low • Replace the toner cartridge.

• Press to clear the message and continue printing.

Tray <x> Missing Insert the tray into the printer.

USM The printer is processing data through the specified USB port.

Waiting The printer has received a page of data to print, but is waiting for an End of

Job command, a Form Feed command, or additional data.

• Press to print the contents of the buffer.

• Cancel the current job.

Diagnostics information 2-7

4512-630

Cartridge error messages

Error Description

31 Defective cartridge

32 Unsupported print cartridge

33 Invalid refill

Paper jam error codes (200-series)

Note: The Event log (see “EVENT LOG” on page 3-25) will list any of these errors that have occurred.

Repeating jams or jam messages can be caused by any of the following:

• Faulty/contaminated pick solenoids or worn cams of the solenoids.

• Faulty/contaminated flags or springs.

• Debris in the paper path.

• Media not of the specified length.

Paper jam error codes (200-series)

Error Description

200.00 Paper jam around input sensor.

200.01 Classic input jam. The media is too long over the input sensor. Possible causes include multi-sheet feed, tray

200.02 The main input sensor never became uncovered from the sheet ahead.

200.03 The video never started on the page at the input sensor within two inches after hitting the input sensor

200.04 The media at the input sensor before interrupt occurred - not enough time elapsed since the printhead started

200.06 Imaged page not expected page (bouncy passthru sensor)

200.08 Media reached the input sensor before the EP was ready

200.09 Transfer servo never started

200.12 Media detected at manual feeder sensor when not expected. Possible causes include user insert of media

200.13 The input sensor is covered when the media is not expected (media in machine during warm-up)

200.14 Trailing edge cleared manual feed, but did not successfully debounce the sensor. Potential causes are a small

200.15 UNRECOVERABLE NO GAP JAM. Engine detected no gap at the manual feeder sensor, attempted to open

size sensing problem, and media slippage.

to expect the printhead mirror motor lock. Possible causes include bouncy sensor or exceptionally fast pick ­perhaps due to media pre-staged in the source tray.

when motor is running or pre-staged media in the tray.

gap or a bouncy manual feed sensor.

the gap by stopping the feed rolls, but no trailing edge was ever seen at the input sensor.

200.16 Transport motor error detected

200.17 Took too long to ramp up transport motor

200.18 Manual feeder sensor never became uncovered from the sheet ahead.

200.19 The media never reached the input sensor, but was detected at manual feeder sensor.

2-8 Service Manual

Paper jam error codes (200-series) (Continued)

Error Description

4512-630

200.20 The media is too long over the manual feeder sensor. Possible causes include multi-sheet feed, media size

200.22 FAILED SMALL GAP OR NO GAP JAM RECOVERY. Engine detected small gap or no gap at the manual

200.23 Laser Servo never started due to potential conflict with the transfer servo. Possible causes: slow or missing

200.24 The measured gap at the input sensor is too small to meet the video delivery requirements. (There is not

200.26 The trailing edge never cleared the input sensor when feeding out the media that was detected during warm-

200.27 Printhead Driver: Mirror motor fell out of lock condition after the media at the input sensor - more time elapsed

200.28 First writing line of a page at the developer nip, but laser servo cleanup is not complete. Likely pre staged

200.29 Printhead drive control out of range due to an external event beyond what the control is designed to handle.

200.30 Narrow media sensor covered during warm-up.

200.32 Media more than 14 inches too long over the manual feeder sensor. Possible causes include multi-sheet feed

(length) problem, pre-staged media in the tray.

feeder sensor, opened the gap by stopping the feed rolls, but never saw the leading edge of the second page at
the input sensor.

transport motor positional feedback, or the media is transferred too quickly to the input sensor.

enough time since prior image finished to start new image)

up.

since the printhead than the expected stable lock time, but less than the printhead jitter-stable specification.

Mirror motor fell out of lock condition after media at the input sensor - more time elapsed since the printhead
than expected stable lock time, but less than the printhead jitter-stable specification.

media or a fast paper feed.

Probable causes: ESD or noise on hsync signal.

or pre-staged media in the tray.

200.33 Page from tray 1 did not reach the input sensor after multiple attempts. Page did make it out of the tray at least

200.34 Timed out waiting for page from tray 1 to reach the input sensor after multiple pick attempts, but the page was

200.35 Failed to create hsync during auto alignment

200.36 Lost hsyncs during auto alignment

200.37 Timeout on data collection during auto alignment

200.38 Interpage servo gap is smaller than expected for printhead offset target evaluation

201.00 Paper jam between input and exit sensor

201.01 Transport motor identification failed to identify either motor after two tries.

201.02 Exit sensor never made by leading edge of page. Also known as internal jam.

201.03 Video never started on the page at the input sensor within two inches after hitting the input sensor

201.05 Restart attempted after an internal jam without the cover open/close event. It is likely that the jam was never

201.25 Exit sensor never made by leading edge of media when feeding out the media that was detected during warm-

201.26 Page at fuser nip before fuser started ramping toward desired temperature. Indicates code may be receiving

as far as the manual feeder sensor. Possible cause is that the page stalled at the alignment gate.

later detected at the input sensor while waiting for any page(s) ahead to clear the paper path. Possible cause is
that the page is delayed at the alignment gate.

cleared.

up.

more hall interrupts than intended

Diagnostics information 2-9

4512-630

Paper jam error codes (200-series) (Continued)

Error Description

201.27 Page at fuser nip before fuser reached acceptable operating temperature. Page arrived at fuser earlier than

202.00 Paper jam around exit sensor.

202.01 Exit sensor never broke on the trailing edge of the sheet at the exit sensor.

202.02 Exit sensor never broke from sheet ahead of page heading toward the exit sensor.

202.06 Exit sensor bounced

202.13 Exit sensor covered, media not expected (media not in machine during warm-up)

202.25 Exit sensor never broke from the sheet ahead of the page heading toward the exit sensor when feeding out the

202.26 Trailing edge never cleared exit sensor when feeding out media that was detected during warm-up.

202.32 Long media or shingled multi feed stopped before sending to duplex.

231.00 Duplex jam while reversing into the device

231.01 Duplex sensor never made by leading edge reversing into the duplex.

231.02 Bouncy duplex sensor never made.

232.00 Duplex jam while staging in the device

232.01 Duplex sensor never broke by the sheet ahead after reversing into the duplex.

232.02 Page in duplex ahead of current reversing page never staged.

expected, so it was probably staged

media detected during warm-up.

233.00 Duplex jam while picking from the device

233.01 Page in duplex never picked.

233.02 Feed error picking from the duplex.

233.03 Paper never reached the input sensor, but was detected at the manual feed sensor.

234.01 Duplex sensor covered during warm-up.

235.01 Invalid duplex media

241.00 Paper jam near tray 1.

241.10 Second pick attempt failed from Tray 1

241.12 Second pick from manual feeder, tray 1, or feeder failed when the media was in the source while other sheets

241.16 Failed to feed from tray 1. Pages in the paper path have been flushed to the output bin.

241.17 MISIDENTIFIED SMALL GAP JAM. Engine detected small gap at the manual feeder sensor, attempted to

241.18 MISIDENTIFIED NO GAP JAM. Engine detected no gap at the manual feeder sensor, attempted to open the

241.19 Second pick attempted failed from Tray 1, no pages printed since calling a 241.10 or a prior 241.19.

were committed to the paper path.

open the gap by stopping the feed rolls, trailing edge was seen at the input sensor, manual feeder sensor is no
longer covered.

gap by stopping the feed rolls, trailing edge was seen at the input sensor, manual feeder sensor is no longer
covered.

242.00 Paper jam near tray 2.

2-10 Service Manual

Paper jam error codes (200-series) (Continued)

Error Description

242.01 Took too long to ramp up dc feed motor

242.08 Received lots of dc feed interrupts before losing them

242.10 Second pick attempt failed from Tray 2

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242.12 Second pick from manual feeder, tray 1, or feeder failed when media was in the source, other sheets were

242.16 Failed to feed from tray 2. Pages in the paper path have been flushed to the output bin.

251.00 Paper jam near the manual feeder.

251.10 Second pick attempt failed from manual feeder.

251.11 Failed to feed from manual feeder. Pages in the paper path have been flushed to the output bin.

251.12 Second pick from manual feeder, tray 1, or feeder failed when media was in the source while the other sheets

251.19 Media never reached the input sensor from the manual feeder.

committed to the paper path.

were committed to the paper path.

Diagnostics information 2-11

4512-630

Service error codes

Service error codes are generally non-recoverable except in an intermittent condition when the printer can be
put into POR to temporarily recover from the error condition.

Service error codes (9xx)

Error Description

Engine software service errors

902.xx Engine software error

Transfer service errors

917.00 Transfer service error

917.01 Transfer servo result too low.

Fuser service errors

920.00 Under temperature during steady state control.

920.01 Fuser took too long to heat up after transitioning to new enhanced mode.

920.02 Fuser fell too far below desired temperature while printing.

920.03 Fuser too cool while checking for slope change.

920.04 Fuser too cool when heating to desired temperature after slope change.

920.05 Fuser under temperature while printing

920.06 Fuser under temperature while printing

920.07 Fuser under temperature while printing

920.08 Fuser temperature did not increase after IR recovery.

920.20 Belt fuser under temperature during steady state control. This can occur in printing or standby modes.

921.00 Under temperature during standby control.

921.01 Fuser temperature did not reach standby temperature after two attempts

922.00 Fuser failed to ramp to target temperature

922.01 Fuser did not reach standby temperature in time (standby control)

922.05 After fuser lamp detection, the fuser did not roll over to steady state control in time.

922.07 Media reached fuser nip and fuser is under temperature

922.08 Fuser warm-up failure (motor start condition)

922.09 Fuser warm-up failure (compression set)

922.20 Belt fuser failed to reach the preheat temperature for the motor to start during warm-up.

922.21 Belt fuser was under temperature when the media reached the fuser nip.

923.00 Fuser is over temperature.

923.01 Fuser is over temperature. This applies to the fuser and belt fusers.

924.00 Open thermistor check.

2-12 Service Manual

Service error codes (9xx) (Continued)

Error Description

924.01 Open thermistor check failure. This applies to the fuser and belt fusers.

4512-630

924.02 Open thermistor check failure. The ADC failed to converge. Possible noisy thermistor signal. This applies to the

Fan service errors

927.00 Service fan error

927.03 Main fan took too long to ramp up

927.04 Main fan is under speed or stalled during speed adjustment state

927.05 Main fan overspeed during speed adjustment state.

927.06 Main fan capture data is invalid and speed control is at maximum in fan control idle state

927.07 Main fan capture data is invalid and speed control is at maximum in fan control adjustment state.

Printhead service errors

931.00 No first hsync

931.01 No first hsync

932.00 Lost hsyncs

932.01 Lost hsyncs

933.00 Printhead boost signal failure

935.10 Printhead sweep error, swept through Hz range without finding the resonant frequency

fuser and belt fusers.

935.11 Printhead sweep error, autosweep hw state

935.12 Printhead sweep error, coarse sweep state

935.13 Printhead sweep error, init fine sweep state

935.14 Printhead sweep error, fine sweep state

935.15 Printhead sweep error, check prelim amp state

935.16 Printhead sweep error, enable amp Kp state

935.17 Printhead sweep error, amp Kp failed to converge

935.18 Printhead sweep error, enable amp Ki state

935.19 Printhead sweep error, amp Ki failed to converge

935.20 Printhead sweep error, enable offset controller state

935.21 Printhead sweep error, load scan regs state

935.22 Printhead sweep error, fwd and rev capture times differ by too much

935.23 Printhead sweep error, check sweep accuracy state

935.24 Printhead sweep error, reserved

935.25 Printhead sweep error, detected resonant frequency out of expected range

935.26 Printhead sweep error, timed out waiting for end of sweep

Diagnostics information 2-13

4512-630

Service error codes (9xx) (Continued)

Error Description

Transport motor service errors

936.01 No lock detected at normal motor start

936.02 No lock detected at motor start for motor ID

936.03 No halls detected at motor start

936.04 Failed to stop within timeout

936.05 Stall detected during speed control

937.00 Main transport motor lost lock

937.01 Main transport motor lost lock, detected by engine control

937.02 Overspeed detected during position control

937.03 Overspeed detected during speed control

Power supply service errors

940.00 LVPS service error

940.01 Line frequency outside allowed range of 45Hz-64Hz

940.02 Line frequency below 43Hz

940.03 No zero cross detected on belt fuser model

2-14 Service Manual

Symptom tables

POST symptom table

Symptom Action

4512-630

The main motor, cooling fan, and fuser do not come
on.

POST completes, but LCD does not appear to be
working.

Main motor does not come on. See “Main motor service check” on page 2-20.

Fan does not come on. See “Cooling fan service check” on page 2-18.

Fuser does not cycle. See “Fuser service check” on page 2-19.

Fuser does not turn on and off. See “Fuser service check” on page 2-19.

The paper feed picks and tries to feed media. See “Paper feed service checks” on page 2-21.

Note: Investigate any displayed codes before proceeding with these symptoms. For example, a missing toner cartridge will
prevent POST from completing.

See “Cover interlock switch service check” on page 2-18.

See “Operator panel service check” on page 2-21.

Diagnostics information 2-15

4512-630

Printer symptom table

Symptom Action

Dead machine (no power). See “Dead machine service check” on page 2-19.

Fan noisy or fan not working. See “Cooling fan service check” on page 2-18.

Fuser parts melted. See “LVPS/HVPS service check” on page 2-20.

Toner not fused to the media. See“Fuser service check” on page 2-19.

Paper jams. See “Paper feed service checks” on page 2-21.

Main motor noisy or not moving. See “Main motor service check” on page 2-20.

Media skew. See “Paper feed service checks” on page 2-21.

Printer not communicating with host. See “Parallel or USB port service check” on page 2-23.

Front access cover will not close. See “Cover interlock switch service check” on page 2-18.

Operator panel button not responding. See “Operator panel service check” on page 2-21.

Operator panel lights are off or very dim. See “Operator panel service check” on page 2-21.

Blank page. See “Blank page” on page 2-24.

Black page. See “Black page” on page 2-25.

Heavy background. See “Heavy background” on page 2-25.

Light print. See “Light print” on page 2-27.

White or black lines or bands. See “White or black lines or bands” on page 2-27.

Toner on back of page. See “Toner on back of page” on page 2-27.

Media never picks. See “Media never picks” on page 2-22.

Media feeds continuously. See “Media picks during POST and/or continuously” on

Media wrinkled or bent. See “Media “trees,” wrinkles, stacks poorly, or curls” on

Print quality problems

• Light print

• Blurred characters

• Toner on both sides of media

• Toner not fused

• Streaks

• Blank pages

page 2-21.

page 2-23.

See “Solving print quality problems” on page 2-28.

2-16 Service Manual

Service checks

Service checks which involve measuring voltages on the LVPS/HVPS (low voltage power supply/
high voltage power supply board) should be performed with the printer positioned on its back side.

Note: When making voltage readings, always use frame ground unless another ground is
specified. See the wiring diagram in the back of the book for more information.

Controller card service check

Controller card service check

FRU Action

4512-630

Controller card
assembly

Warning: Do not
replace the operator
panel and controller
card at the same time.
Each card contains the
printer settings. When
either of these cards is
new, it obtains some of
the settings from the
other card. Settings
are lost when both are
new and replaced at
the same time.

POST (Power-On Self Test)
Note: The printer should complete POST in approximately 30 seconds.

If the printer fails to display lights or activate the drive motor, fuser or fan, check the
following order:

1. Power to the LVPS/HVPS

2. Power from the LVPS/HVPS to the controller card

3. Cables are plugged in correctly, especially for the operator panel. The printer will not
power-up without a functioning operator panel.

4. The controller card assembly.

5. The operator panel. See “Operator panel service check” on page 2-21.

Verify +24 V dc input from the LVPS/HVPS.

1. Turn the printer off.

2. Disconnect the LVPS/HVPS cable from the controller card at J19.

3. Turn the printer on.

4. Verify +24 V dc on positions 8 and 9 of the cable connector.

5. If voltage is correct, check the continuity in the other conductors of the cable. If the cable
is good, check the connectors to the controller board.

6. Verify that pins 7 and 12 on both the cable and the card connector are grounded.

7. If grounds are not correct on the cable, but the cable posses continuity otherwise, check
the LVPS/HVPS.

8. If the grounds are not correct on the controller card, replace the controller card. (Check
with one probe on the connector pin and the other on the card’s ground plane found at
each screw head.)

Controller card voltage outputs
Turn the printer off, and plug the LVPS/HVPS cable into J19 of the controller card. See the

wiring diagram at the end of the book which identifies the voltages and grounds for a good
controller card.

Turn the printer off before plugging or unplugging any connectors.

Diagnostics information 2-17

4512-630

Controller card service check (Continued)

FRU Action

LVPS/HVPS Verify main power to controller card

With the printer off, unplug the LPS/HVPS cable at J19 on the controller card. Verify
grounds on pins 7, 12, and 14 for both the cable and the controller card. If any of these
grounds are incorrect, check the cable for continuity. Replace the cable or the respective
card as necessary.

Turn the printer on with the cable still unplugged, and verify the following on the cable
(controller card will not be powered):

Pins Voltage

J19-8 +24 V dc
J19-9 +24 V dc
J19-13 +5 V dc

If any of the voltages are incorrect, replace the LVPS/HVPS. See “Dead machine service

check” on page 2-19.

Cooling fan service check

FRU Action

Cooling fan Make sure the fan cable plug is properly seated at J4 (controller card).

Turn the printer off, and disconnect the cooling fan cable from the controller card.
Turn the printer on. Within a few seconds, the controller card assembly should apply

+24Vdc to pin2.

• If voltage is present and the fan is not turning, replace the cooling fan. If the fan still
doesn’t function, replace the controller card.

• If voltage is not present, check the controller card.

Cover interlock switch service check

Note: Make sure a print cartridge assembly is installed and the cover closes all the way, engaging the cover
open switch lever.

FRU Action

Cover interlock switch Disconnect the cover interlock cable from the controller card at J6.

With the printer turned off, verify continuity between cable pin 1 and pin 2 with the door
closed and discontinuity with the door open.

Verify continuity between cable pin 1 and pin 3 with the door open and discontinuity with the
door closed.

Verify discontinuity between cable pins 2 and 3 whether the door is open or closed.

• If either fails, replace the cover interlock switch.

• If both pass continuity, turn the printer on, and measure +5 V dc on pin 2 at J6 on the
controller card.

• Verify pin 3 at J6 is ground.

• If voltage or ground is not present, see “Controller card service check” on page 2-17
for more information.

2-18 Service Manual

Dead machine service check

CAUTION: Check the AC line voltage. The voltage should be within the following limits:

• 100 V ac (volts alternating current) – 127 V ac for the 110 V printer

• 200 V ac – 240 V ac for the 220 V printer

FRU Action

Unplug the printer. Remove the LVPS/HVPS, and check the fuses for continuity.

• If open, replace the LVPS/HVPS.

• If not open, check the switch continuity across its conductors with the switch on. Turn
the switch off. Plug the AC line into the LVPS/HVPS and switch unit on.

LVPS/HVPS

Note: Voltages may be exposed at several places on the board. Do these verifications, and
then unplug the card:

4512-630

• Verify 24 V dc on pins 8, 9, and 10 at PCN1.

• Verify approximately 3V on pins 1–3.

• Verify approximately 5V on pins 4 and 13.

• If voltages are not correct, replace the LVPS/HVPS.

• If voltages are correct, check the controller card. See “Controller card”

on page 5-3.

Fuser service check

When toner is partially fused to the media, it is usually caused by low fuser temperature.

The line voltage to the printer must be within the following limits:

• 100 V ac–127 V ac for the 110 V model printer

• 200 V ac–240 V ac for the 220 V model printer

This printer uses a belt fuser and therefore does not have a lamp.

Fuser service check

FRU Action

Unplug the printer, and disconnect the fuser cable plug from the LVPS/HVPS board
connector at PCN5.

Check for continuity across the fuser by checking across the connector pins.

Fuser power cable
LVPS/HVPS
Fuser

Make sure the fuser thermistor is correctly connected to the controller board at J13. If the
problem persists, disconnect the thermistor cable and check for less than +5 V dc on pin 1.
Pin 2 should be ground. If line voltage is incorrect on pin 1, see “Controller card service

check” on page 2-17 for more information.

• If there is continuity, check the LVPS/HVPS. See “LVPS/HVPS service check” on

page 2-20.

• If there is no continuity, disconnect the fuser power cable at both ends and check each
conductor for continuity. Replace cable if necessary.

• If the cable tests good, replace the fuser.

Fuser

Disconnect the thermistor cable from J13 on the controller card.
Measure the resistance across the ends of the thermistor cable.
Replace the fuser assembly if the resistance is lower than 1K ohm or shorted.
Note: Resistance measures approximately 400K ohms when cool and 1K ohms hot.

Diagnostics information 2-19

4512-630

LVPS/HVPS service check

FRU Action

LVPS portion of board

Fuses that open typically indicate a faulty LVPS/HVPS.
Disconnect the power cable, and open the LVPS/HVPS enough to test the switch. The

switch will show continuity across the conductors with a meter when the switch is on. If the

LVPS/HVPS

switch is good, see “Dead machine service check” on page 2-19 for more diagnostics.

HVPS portion of board

Problems with the HVPS are exhibited in the print quality. See “LVPS/HVPS service

check” on page 2-20 for more information.

Main motor service check

FRU Action

Turn off the printer, and unplug the main motor cable at J17. Turn on the printer, and check
for the following voltages at J17:

Main gear drive
Main motor cable
LVPS/HVPS
Controller card

Warning: Do not
replace the operator
panel and controller
card at the same time.
Each card contains the
printer settings. When
either of these cards is
new, it obtains the
settings from the other
card. Settings are lost
when both are new
and replaced at the
same time.

Verify ground at pin 5 for both the card and cable.

• If these voltages are correct, check the main motor cable for continuity.

- Remove the left side cover to access the connector on the motor.

- If continuity exists on each wire, replace the main gear drive which includes the

- If continuity does not exist on one or more of the wires, replace the motor cable.

• If these voltages are not correct, see “Controller card connector pin values” on

page 5-4, or replace the controller card. See “Controller card removal” on page 4-15.

J17 pins Voltages

Pins 1–4 Approx. +3.3 V dc
Pin 6 Approx. +5 V dc
Pins 7–9 10 V dc–24 V dc

motor.

2-20 Service Manual

Operator panel service check

Inspect the operator panel cable for damage. Make sure the cable is plugged in securely. Run POST, and check
each light for proper operation. See “Power–On Self Test (POST) sequence” on page 2-1.

LCD Operator panel service check

FRU Action

4512-630

Operator panel (LCD)
Controller card

Warning: Do not
replace the operator
panel and controller
card at the same time.
Each card contains the
printer settings. When
either of these cards is
new, it obtains the
settings from the other
card. Settings are lost
when both are new
and replaced at the
same time.

Lights

If the LCD does not come on, open the controller card cage and locate the operator panel
connector at J3. Make sure the cable is properly connected to the controller card and the
controller card has input voltage to it.

With the printer on, verify the following without disconnecting the cable:

• Pins 1, 3, 5, and 6—3.3 v

• Pin 2—5 v

• Pins 4 and 7—GND

If these are correct and the operator panel is not functioning, replace the operator panel.
If any are incorrect, see “Controller card service check” on page 2-17.

Buttons

If the buttons do not respond, replace the operator panel. There is no test or repair for the
faulty switches.

Paper feed service checks

Paper jam error indication during POST

FRU Action

Fuser (exit sensor) If the exit sensor flag, which is visible at the back of the fuser, is in any position other than

vertical, the printer will display a paper jam. Make sure the flag is operating freely. Replace
the fuser if the sensor is damaged.

Input/duplex sensor
Manual feed sensor

Make sure the input paper feed sensors are working properly. A stuck or incorrectly installed
sensor causes a paper jam indication.

Media picks during POST and/or continuously

FRU Action

ACM
Manual feed clutch

Check the ACM clutch for wear. The solenoid interacts with the clutch to control the motion
of the pick tires.

If the ratchet teeth of the ACM clutch assembly are worn or broken, the solenoid may not
stop the ACM from rotating. Replace the ACM clutch assembly if necessary.

Check the manual feed clutch for damage.

Diagnostics information 2-21

4512-630

Media picks but stops halfway through the printer

FRU Action

Input/Duplex sensors
(under print cartridge assembly)
Input sensor (manual)

Make sure the input sensors are working properly.
Check for a broken or stuck flag on the input sensors.
Make sure the cables are seated on the controller card at J23 (Tray 1 input) and

J20 (manual input).
Check for about +5 V dc on pin 6 at J23 (Input sensor #1) and pin 3 at J20 (Input

sensor #2).

• If correct, replace the input paper feed sensor.

• If these voltages are not correct, replace the controller card.

Media never picks

FRU Action

Paper feed (pick tires) tray 1
Paper feed (pick tires) tray 2
Media drive ASM
Media feed clutch ASM
Manual feed clutch ASM
P/U and manual feed solenoid
ACM drive shaft

Open the left cover, and verify that the solenoids and clutches are functioning
when an attempt is made to feed the media.

Make sure the rubber tires on the ACM are installed and clean.
Replace the tires, ACM drive, clutch assemblies, solenoids, or drive shaft as

necessary.

Media occasionally mispicks or picks multiple sheets at once

FRU Action

Tray 1
Tray 2 (option)

Paper pick tires
(Tray 1 or tray 2)

ACM clutch complete bill
of material (CBM)
Manual feed clutch CBM
Media feed clutch ASM
(tray 1 only)
Manual feed clutch ASM

Controller card
P/U and manual feed
solenoid ASM.

Check tray for media catch points.
If the sheet being fed stops momentarily, the ACM applies additional vertical force,

causing additional sheets to feed.
Do not mix media types in one tray.

Check the tires in the ACM assembly for signs of wear or damage.
Replace the tires as necessary.

Open left cover, and observe the solenoid and clutch actions at the ACM and manual feed
shafts as a print job is attempted.

Replace the faulty part.

Disconnect the solenoid cable at J21 on the controller card.
Measure the resistance across cable pins 1 and 2 and then pins 3 and 4.

• The resistance should be
180–250 ohms.

• If it is not, replace the solenoid assembly.

• If the resistance is 180–250 ohms, check the controller card. See “Controller card

service check” on page 2-17 for more information.

Replace controller card as necessary.

2-22 Service Manual

Media skews

FRU Action

4512-630

Paper feed (pick tires) tray 1
Paper feed (pick tires) tray 2
Tray 1
Tray 2 (option)

Check tires for debris. If tires are new, try reversing each on its hub.
Check side guides on Tray 1 and Tray 2. Guides set for a full stack of media may

be too wide when the stack is short.

Media “trees,” wrinkles, stacks poorly, or curls

FRU Action

Fuser This problem is most likely due to a worn backup roll. It causes the printer to run hotter than

required for the media being printed. Excessive heat can cause media treeing problems,
poor stacking, or curl.

Print the menu sheet (press and release with the printer in ready mode).
Look at the media settings. Some, such as card stock or rough texture, may require a higher

fuser temperature, which leads to more of these problems (except stacking) in plain paper.

• Change settings using the printer driver.

• Use the local printer setup utility (included on the CD) to change the NVRAM
settings.

Try a different ream of paper. Moist media has a higher tendency to crease (treeing) and
curl.

Parallel or USB port service check

1. Perform a print test to make sure the printer prints correctly. Verify that the indicator light is on, then press

to print menu settings.

2. Be sure the printer parallel cable is designed for bidirectional printing.

3. Be sure the user’s application is set up correctly.

4. If the internal print test page prints correctly, the user’s application/printer driver is set up correctly, and the

correct bidirectional parallel cable is installed, but the printer still fails to print on command from the host
computer, replace the controller card.

5. Check the USB cable for continuity.

Diagnostics information 2-23

4512-630

Print quality service checks

Note: Ensure the cover closes tightly. A gap in the opening may allow light to expose the photoconductor
resulting in a ‘dirty’ print. Extreme environmental conditions, temperatures, and humidity will affect the print
quality.

Using print quality test pages

To help isolate print quality problems, like streaking, print test pages using the print quality test pages. To print
the print quality test pages:

1. Enter Configuration Menu.
a. Turn off the printer.
b. Turn on the printer while pressing and holding and .
c. Release the buttons when Performing Self Test displays.
d. The message CONFIG MENU displays.
e. Press to Prt Quality Pgs.
f. Press to print the pages.

Four pages print to help evaluate print quality. The first page has various fonts and a graphic, the second
page is gray with graphics, the third page is black, and the last page is blank.

2. Use the test pages to isolate problems such as light or toner streaks. See “POST symptom table” on

page 2-15 for solutions to these problems.

3. Press to Exit Config Menu and press .

To exit configuration, turn the printer off.

Blank page

FRU Action

Toner cartridge (not a
FRU)

Printhead
LVPS/HVPS
Controller card

Remove the toner cartridge, and gently shake it to evenly distribute the toner.
Check for cartridge damage.

Blank pages can be caused by a defective printhead assembly,
LVPS/HVPS, or controller card.

• Printhead errors typically result in printer service errors unless there is blockage of the
beam or dust on the lens.

• Blank pages typically are caused by the PC roll not being properly charged. Try a
different PC kit.

Unplug the printer, and check the cable continuity between the LVPS/HVPS connector
marked OPC (at PCN 2) and the corresponding wire form (spring) found about 14 mm
above and to the right of the transfer roll gear.

• If there is not continuity, call the next level of service.

Try a different toner cartridge and PC kit.

• If those fail, replace the LVPS/HVPS, controller card, or the printhead in that order.

2-24 Service Manual

Black page

Note: Incorrect laser exposure or incorrect charging of the photoconductor causes an all black page. Always

verify the same results from a different print cartridge assembly and developer before proceeding.

FRU Action

4512-630

Toner electrodes (not a
FRU)

LVPS/HVPS board
Controller card
Miscellaneous cables

Check the three rearward electrodes below the print cartridge assembly for contamination
or damage. Correct as necessary.

Check continuity between the cable (DEV, TAR, and doctor blade) connection PCN3 and on
the contact tips below the print cartridge assembly.

• If continuity fails, call the next level of service.

With the printer off, disconnect the LVPS/HVPS cable from J19 on the controller card.
Turn the printer on, and verify +24 V dc on pins 8 and 9 of the cable.
Verify ground on pins 7, 12, and 14.

• If the voltage is incorrect, replace LVPS/HVPS board.

• If grounds are incorrect, check ground paths.

• Check confinuity in the cable. Replace the cable if necessary.

• If voltage is correct and the toner electrodes are good, replace the controller card.

• See the “LVPS/HVPS service check” on page 2-20 and the “Controller card service

check” on page 2-17, if necessary.

Heavy background

Poor development or poorly charged toner particles cause excessive background. This is more noticeable as the
toner cartridge nears end-of-life.

FRU Action

Toner cartridge (not a
FRU)
PC Kit (not a FRU)

Check the toner darkness setting in the driver. Try a lower setting.
Make sure the toner cartridge and PC Kit are correctly installed and the high voltage

contacts are clean.
If the toner cartridge and PC Kit are installed correctly, try a new PC Kit first and then toner

cartridge.

LVPS/HVPS
Controller card

Check the contacts for correct installation and contamination where contact is made
between the print cartridge assembly and spring contacts which connect to the LVPS/HVPS
board at PCN3. Clean as necessary.

If this does not correct the problem, replace the following FRUs one at a time in the order
shown:

• LVPS/HVPS board (See “Black page” on page 2-25 for pin values.)

• Controller card

Diagnostics information 2-25

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Partial blank image/white spots (no repeating pattern)

FRU Action

Toner cartridge (not a
FRU)

Paper (not a FRU) Make sure recommended media is being used.

Remove the toner cartridge assembly, and gently shake the assembly to evenly distribute
the toner.

Check to make sure that the laser light path is not blocked.
If toner cartridge is low, try a new one.

Check the media settings in the printer driver. A heavier media may require higher heat to
properly fuse.

Variation in image density horizontally across page

FRU Action

PC Kit (not a FRU) The charge roll may have an unbalanced force against the PC (photoconductor) drum.

Try a new PC Kit.

Transfer roll Note: Do not touch the transfer roll except at its ends. Place a sheet of paper over the roll to

prevent damage from finger oils or hand lotion.
Check the springs in the left and right transfer roll bearings. The bearing assemblies should

support the transfer roll, applying evenly distributed forces to the PC drum.
Replace the transfer roll assembly if the springs or bearings show signs of damage or

fatigue.
Inspect the transfer roll for signs of wear, damage or contamination.
Replace as necessary.

Poor fusing of image

FRU Action

Fuser The fuser may not be operating at the proper temperature to fuse the toner to the media.

Media (not a FRU) Make sure recommended media is being used.

See“LVPS/HVPS service check” on page 2-20 for more information. Try changing the
setting to heavier media or even card stock.

Check the media settings in the printer driver.

2-26 Service Manual

Light print

FRU Action

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Toner cartridge (not a
FRU)

Transfer roll
LVPS/HVPS card

Make sure the toner cartridge and PC Kit are installed correctly and that the toner cartridge
is not low on toner.

If the problem continues, install a new toner cartridge.
Recheck condition before replacing PC Kit, if necessary.

Check the transfer roll for signs of toner buildup and contamination.
Inspect the HVPS contact (transfer roll) for contamination.
Verify the high voltage cable is plugged into the LVPS/HVPS.
If all components appear free of contamination, replace the following FRUs one at a time in

the order shown:

•Transfer roll

• LVPS/HVPS card

White or black lines or bands

FRU Action

Print cartridge
assembly (not a FRU)
Developer drive
coupling assembly
Main gear drive

Banding appears as light or dark horizontal lines on a uniformly gray page or on a page with
a large area of graphics. Banding is primarily due to a variation in the speed of the media as
it feeds through the printer, especially in the developer and transfer process. It may also be
a result of overly dry or moist environments.

With the printer off, check to make sure that the laser beam is not blocked.
Inspect the toner cartridge and paper feed components, especially the drive coupler and

drive gears for debris, binds, or damage.

Toner on back of page

FRU Action

PC Kit (not a FRU) Print a menu page found under Utilities, and check settings for media type.

Inspect the overall paper path for signs of spilled toner.
Gently clean the contaminated areas with a soft cloth.

Fuser Inspect the fuser for signs of contamination.

Replace the fuser as necessary.

Transfer roll A transfer roll contaminated with toner can cause toner to transfer to the back of pages.

Inspect the transfer roll for contamination, and replace as necessary.

Diagnostics information 2-27

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Solving print quality problems

Print quality problems

Problem Cause / action

Light or blurred
characters.

Toner smudges appear
on the front or back of
the page.

Light print

See “Light print” on page 2-27.
The toner cartridge may be getting low on toner:

• Remove the toner cartridge and print cartridge assembly.

• Shake it from side to side to redistribute the toner.

• Reinstall it and recheck for condition.

• Make sure to use the recommended print media (see media types and sizes in the
User’s Reference).

• Use MarkVision
media weight.

• The toner cartridge or PC Kit may be defective. Replace the PC Kit first and recheck.

Blurred characters
Blurred images, including characters, are usually caused by a defective printhead.

Vertical white lines

See “Vertical streaks below.
Vertical white lines may be caused by the laser beam, which may be partially blocked. With

the printer off, clear the path or clean the lens. The toner cartridge or fuser may be
defective. Try a different toner cartridge. Inspect the fuser at its entry for debris.

• Make sure the media is straight and unwrinkled.

• Replace the PC Kit and recheck before replacing the toner cartridge. See “Toner on

back of page” on page 2-27 for more information.

TM

to define the custom type setting for media type, media texture, or

Vertical or horizontal
streaks appear on the
page.

2-28 Service Manual

Vertical streaks

Something could be caught between the PC kit and the fuser. Check the paper path around
the fuser entry. Try a different toner cartridge.

Vertical white lines may be caused by the laser beam which may be partially blocked. With
the printer off, clear the path or clean the lens. The toner cartridge or fuser may be
defective. Try a different toner cartridge. Inspect the fuser at its entry for debris.

Horizontal streaks

The toner cartridge or the fuser may be the cause due to excessive page count or defect.
Replace as needed.

If the lines are parallel and match the two intended ghost images, the Form Type may be
incorrectly set. Check those settings.

The PC cleaner sump may be full. Replace the PC kit.

Print quality problems (Continued)

Problem Cause / action

4512-630

Toner smears or rubs
off the page.

The print is getting
light, but the printer
has not indicated it is
low on toner.

The Toner Low
message displays.

Solid black areas on
transparencies

• Toner is not being fused to the media. Replace the fuser.

• Change the media texture setting in the driver. If special media is being used, such as
card stock or labels, be sure to select the correct media type.

• Try a different kind of media. Media designed for copiers gives the best quality fusing.

• Toner is becoming low in the cartridge.

• The Toner Low message does not display if the 1,500 page toner cartridge is installed.

• Remove the toner cartridge, and gently shake it from side to side to redistribute the
toner.

• Replace the toner cartridge.

• Remove the toner cartridge, and gently shake it from side to side to redistribute the
toner.

• Replace the toner cartridge.

• There is a mismatch in the transparency and what the software is expecting.

• Choose a different fill pattern in the software program.

• Remove the toner cartridge, and gently shake it from side to side to redistribute the
toner.

• Try a different type of transparency.

• Replace the toner cartridge.

Faint images or
repetitive spots appear
on the page.

Pages are blank. • The print cartridge may be out of toner or defective. Replace the cartridge.

• Select a different media type or form type setting from the printer driver.

• Try a different type of media. Media designed for copiers gives the best quality.

• Replace the toner cartridge.

• There may be a software error. Re-initialize the printer by turning it off and back on.

• With the printer off, check the printhead beam path. If clear, check for a printhead error
on POR. See “Printhead service check” on page 2-31.

Diagnostics information 2-29

4512-630

Print quality problems (Continued)

Problem Cause / action

The printer is on and
indicates ready, but
nothing prints.

Toner Low message on
and printing stops.

Close door message
on.

Toner Low message
on.

The media skews or
buckles.

The media sticks
together, resulting in
the printer feeding
multiple sheets.

• Make sure the parallel or USB cable is not damaged and is firmly plugged into the
connector on the back of the printer.

• Make sure the toner cartridge assembly is installed properly.

• Print the menu page found under Utilities.

- If a menu settings page cannot be printed, contact the next level of support.

- If a menu settings page can be printed, the problem is one of the following:

• Computer

• Software program

• Cable

• (USB only) A failed controller card. Replace card.

Note: Test by unplugging USB and plugging it with the printer on. If the computer indicates

“unknown device,” replace the controller card.

If a 3.5K or more page toner cartridge is being used and the Toner Low alarm is set to on,
the printer stops printing until the toner cartridge is replaced.

Make sure the printer front cover is closed.

• Make sure the toner cartridge is installed correctly.

• Install a new toner cartridge.

• Tray is overfilled or media is too loose.

• Don’t overfill Tray 1 or the optional Tray 2 (see media capacities in the media types and
sizes table in the User’s Guide).

• Make sure the paper guides are flush against the edges of the media.

• The friction between sheets is too high.

• Remove the media from Tray 1 or Tray 2, and fan it.

• Don’t overfill Tray 1 or the optional Tray 2 (see media capacities in the media types and
sizes chart in the User’s Reference).

The media fails to feed
from Tray 1.

The media fails to feed
from the optional
Tr ay 2 .

The Load Paper
message displays
even though there is
media loaded in the
optional Tray 2.

The printer does not
print after a paper jam
has been cleared.

• Frictional force between tires and media is less than resisting force.

• Remove the media from Tray 1, and fan it.

• Make sure Tray 1 is selected from the printer driver. Do not overfill the tray.

• Check the condition of the rubber on the paper feed rolls. Replace if worn or
contaminated.

• Verify that the ACM clutch is functioning correctly.

• Incorrect tray selection or inadequate picking force by tires.

• Make sure the correct tray and media type are selected from the driver.

• Make sure the tray is pushed all the way in.

• Remove the media from the optional Tray 2, fan it, and reload.

• Check the rubber on the paper feed tires for dirt or any other debris. Replace as
necessary.

• Check the paper path in the tray for burrs or debris that may hinder media movement.

• Make sure the media does not exceed the stack height indicator.

• The input sensor does not sense media after picking.

• Make sure the tray is pushed all the way in.

• Press .

• Check the feed tires. (See two preceding actions.)

• The printer is waiting on the next command.

• Clear all jams.

• Press and release , or open and close the printer cover to restart the printer.

• Make sure the print cartridge assembly is installed properly.

2-30 Service Manual

Print quality problems (Continued)

Problem Cause / action

4512-630

Unexpected characters
print or characters are
missing.

Jobs are not printing,
and the error light is on
solid.

While in PostScript 3
emulation, the printer
is flushing data
(Ready/Data and Error
lights are blinking).

• Ensure correct printer driver is being used.

• Select hex trace mode to determine what the problem is.

• Restore factory defaults.

• Make sure the parallel cable or USB cable is firmly plugged in at the back of the printer.

• The printer is waiting for an appropriate command.

• Make sure the print cartridge assembly is installed properly.

• Make sure the printer front cover is closed.

• Ensure the correct PostScript driver is being used.

• The printer doesn’t have enough memory to print the job. Install more memory.

Printhead service check

FRU Action

Turn the printer off.
Disconnect the printhead cables from J8 and J15 on the controller card.
Turn the printer on with the front door closed.
On the controller card, verify +5 V dc on pin 10 at J8 and +5 V dc on pins 1 and 2 at J15.

Printhead
Note: New printhead

must be aligned.

Verify grounds on pins 2, 4, and 7 at J8 and on pin 4 at J15.

• If voltages or grounds are incorrect, check the controller card. See “Controller card

• If voltages are correct, replace the printhead (comes with cables).

service check” on page 2-17 for more information.

Transfer roll service check

FRU Action

Note: Do not touch the transfer roll except at its ends. Place a sheet of paper over the roll to

prevent damage from finger oils or hand lotion.
Check the springs in the left and right transfer roll bearings. The bearing assemblies should

support the transfer roll, applying evenly distributed forces to the PC drum.

Transfer roll

Note: Do not try to move the left spring.
Replace the transfer roll assembly if the springs or bearings show signs of damage or

fatigue.
Inspect the transfer roll for signs of wear, damage or contamination.
Replace as necessary.

Diagnostics information 2-31

4512-630

2-32 Service Manual

4512-630

3. Diagnostic aids

This chapter explains the tests and procedures to identify printer failures and verify repairs have corrected the
problem.

Accessing service menus

There are different test menus that can be accessed during POR to identify problems with the printer.

Diagnostics Mode 1. Turn off the printer.

2. Press and hold and .

3. Turn on the printer.

4. Release the buttons when
Performing Self Test
displays.

Configuration Menu 1. Turn off the printer.

2. Press and hold and .

3. Turn on the printer.

4. Release the buttons when
Performing Self Test
displays.

Flash system code
mode

1. Turn off the printer.

2. Press and hold , ,
and .

The Diagnostics Mode group contains the settings
and operations used while manufacturing and
servicing the printer.

See “Diagnostics mode” on page 3-2 for more
information.

The Configuration Menu group contains a set of
menus, settings, and operations which are
infrequently required by a user. Generally, the
options made available in this menu group are
used to configure a printer for operation.

See “This selection exits Diagnostics mode,

and Resetting the Printer displays. The
printer performs a POR, and the printer returns
to normal mode.” on page 3-22 for more

information.

3. Turn on the printer.

4. Release the buttons when
Performing Self Test
displays.

To run the printer diagnostic tests described in this chapter, you must put the printer in Diagnostic Mode.

Diagnostic aids 3-1

4512-630

Diagnostics mode

Entering Diagnostics mode

1. Press and hold and .

2. Turn on the printer.

3. Release the buttons when Performing Self Test displays.

Available tests

The tests display on the operator panel in the order shown:

Diagnostics mode tests

REGISTRATION See “REGISTRATION” on page 3-4

Bottom Margin
Top Margin
Left Margin
Right Margin
Printhead See “Printer (printhead) alignment settings” on page 3-6
Quick Test See “Quick Test” on page 3-9

PRINT TESTS

Tray 1 Se e “Input source tests” on page 3-10
Prt Quality Pgs See “Print quality pages (Prt Quality Pgs)” on page 3-10

HARDWARE TESTS

Panel Test See “Panel Test” on page 3-11
Button Test See “Button Test” on page 3-11
DRAM Test See “DRAM Test” on page 3-11
CACHE Test
Parallel Wrap See “Parallel Wrap tests” on page 3-12
Parallel 1 Wrap (if installed)

3-2 Service Manual

4512-630

Diagnostics mode tests (continued)

DUPLEX TESTS (if installed)

Quick Test See “Quick Test (duplex)” on page 3-13
Top Margin See “Top/Left Margin (duplex)” on page 3-13
Sensor Test See “Sensor Test (duplex)” on page 3-14
Duplex Feed 1 See “Duplex Feed 1” on page 3-14

INPUT TRAY TESTS

Feed Tests See “Feed Tests (input tray)” on page 3-15

OUTPUT BIN TESTS

Feed Tests See “Feed Tests (output bins)” on page 3-16
Sensor Test See “Sensor Test (standard output bin)” on page 3-16

BASE SENSOR TEST See “BASE SENSOR TEST” on page 3-17

Exit
Front Door
Input

PRINTER SETUP

Defaults See “Defaults” on page 3-18
Page Count See “Page Count” on page 3-18
Perm Page Count See “Perm Page Count (permanent page count)” on page 3-18
Serial Number See “Serial Number” on page 3-18
Engine Setting 1 through 4 See “Engine Setting 1 through 4” on page 3-18
Model Name See “Model Name” on page 3-18
Configuration ID See “Configuration ID” on page 3-19
Edge to Edge See “Edge to Edge” on page 3-19
Par S Strobe Adj See “Parallel strobe adjustment (Par x Strobe Adj)” on page 3-19
Par x Strobe Adj (if additional

parallel options are installed)

Diagnostic aids 3-3

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Diagnostics mode tests (continued)

EP SETUP

EP Defaults See “EP Defaults” on page 3-20
Fuser Temp See “Fuser Temperature (Fuser Temp)” on page 3-20
Transfer See “Transfer” on page 3-20
Print Contrast See “Print Contrast” on page 3-20
Charge Roll See “Charge Roll” on page 3-20
Gap Adjust See “Gap Adjust” on page 3-20

EVENT LOG

Display Log See “Display Log” on page 3-21
Print Log See “Print Log” on page 3-21
Clear Log See “Clear Log” on page 3-22

EXIT DIAGNOSTICS

Exiting Diagnostics mode

Select Exit Diagnostics to exit the Diagnostics mode. Resetting the Printer displays, the printer
performs a POR, and returns to normal mode.

REGISTRATION

Print registration makes sure the printing is printed properly aligned on the page.

The settings available are:

Bottom Margin
Top Ma r g i n
Left Margin
Right Margin
Quick Test

To set print registration:

1. Select REGISTRATION from the DIAGNOSTICS menu.

2. Select Quick Test, and press .

To print the Quick Test page:

a. Press until the appears next to Quick Test.
b. Press .

Retain this page to determine the changes you need to make to the margin settings.

The message Quick Test Printing… appears on the display.

3-4 Service Manual

4512-630

3. Use or to select the margin setting you need to change, and press .

The Top margin sign/value pair blinks. This indicates it is the margin value being changed.

T=xxx* B=xxx*
L=xxx* R=xxx*

4. Use to decrease or to increase the offset values, and press to confirm the value.

The message Submitting selection displays, and the original REGISTRATION screen appears with
the beside the previously selected margin setting.

The print registration range is:

Variable Description Value Direction of change

B= Bottom margin -20 to +20 Each increment causes

approximately 0.55 mm shift in the
bottom margin.

T= Top margin -25 to +25 Each increment causes

approximately 4 pels shift (at 600
dpi).

L= Left margin -25 to +25 A positive change moves the image

R= Right margin -10 to +10 A positive change moves the image

A positive change compresses the
image so it appears to move down
the page and a negative change
moves the image up.

A positive change moves the image
down the page and increases the
top margin. A negative change
moves the image up and decreases
the top margin.

to the right, and a negative change
moves the image to the left. No
compression occurs.

to the right, and a negative change
moves the image to the left.

5. Continue changing the settings by repeating steps 2 through 4.

6. Print another copy of the Quick Test to verify your changes.

7. To exit REGISTRATION, press Back ( ).

Diagnostic aids 3-5

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Printer (printhead) alignment settings

A step-by-step process to align a new printhead.

1. Press Go to print Step 1 test page.

Step 1 printout

(sample only; use actual sheet)

2. In column <BA> of Step 1 test page, look for the position where the vertical lines are the closest to each

other. Press to select the corresponding number (new setting).

3. Press and release to move to the <CA> pattern on the right side of Step 1 test page.

4. Press to select the <CA> setting.

3-6 Service Manual

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5. Press Go to print Step 2 test page.

Step 2 printout

(sample only; use actual sheet)

6. Press to change the <BA> settings to the number beside the darkest portion of the vertical bar.

7. Press and release to move to the <CA> settings on the right side of Step 2 test page.

8. Press to change the <CA> settings to the number beside the darkest portion of the vertical bar.

Diagnostic aids 3-7

4512-630

9. Press Go to print Step 3 test page.

Step 3 printout

(sample only; use actual sheet)

10. Press to change the <BA> setting to the number beside the darkest portion of the vertical bar.

11. Press and release to move to the <CA> settings on the right side of Step 3 test page.

12. Press to change the <CA> settings to the number beside the darkest portion of the vertical bar.

3-8 Service Manual

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13. Press Go to print Visual alignment page.

Visual alignment printout

(sample only; use actual sheet)

14. Verify that the overall darkest line across the page is “0.” If not, then run the alignment again.

15. Turn the printer off to exit the printer alignment menu.

Quick Test

The Quick Test contains the following information:

• Print registration settings

• Alignment diamonds at the top and bottom

• Horizontal lines to check for skew

• General printer information, including current page count, installed memory, serial number, and code level.

To print the Quick Test page:

Note: Print the Quick Test Page on letter or A4 paper.

1. Select REGISTRATION from DIAGNOSTICS.

2. Press until the appears next to Quick Test.

The message Quick Test Printing… appears on the display.
Once the Quick Test Page completes printing, the Registration screen displays again.

Diagnostic aids 3-9

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PRINT TESTS

Input source tests

The purpose of the diagnostic Print Tests is to verify that the printer can print on media from each of the installed
input options. The contents of the Print Test Page varies depending on the media installed in the selected input
source.

Check each Test Page from each source to assist in print quality and paper feed problems.

To run the Print Test Page:

1. Select PRINT TESTS from the Diagnostics menu.

2. Select the media source.

Tr ay 1
Tray 2 (if installed)
Multipurpose Feeder (if installed)
Envelope Feeder (if installed)

3. Select Single or Continuous.

• If Single is selected, a single page is printed.

• If Continuous is selected, printing continues until Stop ( ) is pressed to cancel the test.

If a source is selected that contains envelopes, an envelope test pattern is printed. If Continuous is
selected, the test pattern is printed only on the first envelope.

Note: The Print Test Page always prints on one side of the paper, regardless of the duplex setting or the
presence of a duplex option.

Press Back ( ) to return to PRINT TESTS.

Print quality pages (Prt Quality Pgs)

The purpose of this diagnostic function is to allow printing of the print quality test pages with the toner cartridge
lockout function disabled. The print quality pages consist of three pages. Page one contains a mixture of
graphics and text. Pages two and three only contain graphics. If duplex is turned on, the pages are duplexed.
The Print Quality Test pages are printed in English and must always be printed on letter, legal, or A4 paper.

To run the Print Quality Test Pages, select Prt Quality Pgs from PRINT TESTS. The message Printing
Quality Test Pages is displayed.

Note: The print quality test pages can also be printed from the Configuration menu (CONFIG MENU), however
a cartridge must be installed with a machine class ID matching the machine class ID stored in NVRAM.
Additional diagnostic information may be printed on the pages when printing from DIAGNOSTICS.

The following is included in the DIAGNOSTICS version of the print quality pages:

• Values from EP SETUP in DIAGNOSTICS, including:

Fuser temperature, warm up time, transfer, print contrast, and charge roll settings.

• Contents of the EVENT LOG from DIAGNOSTICS.

• Configuration information, including printer serial number, controller code level, engine code level, operator

panel code level, font versions, and cartridge information.

• Default values for the QUALITY MENU settings used to print the pages.

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HARDWARE TESTS

Select the following Hardware Tests from this menu:

• Panel Test

• Button Test

• DRAM Test

• ROM Memory Test

• Parallel Wrap (if available)

• Serial Wrap (if available)

Panel Test

This test automatically toggles each pixel of the operator panel through every contrast level beginning with the
darkest and on to the brightest. This test continues until you press Stop ()

Button Test

The Button Test verifies the operation of the buttons on the operator panel. When you select Button Test, a
diagram of the operator panel appears on the panel. When you press a button on the operator panel, an X

appears on the corresponding diagram. When you release the button, an X disappears. Pressing Back () or
Stop ( ) cancels the test.

.

DRAM Test

The purpose of this test is to check the validity of DRAM memory, both standard and optional. The test writes
patterns of data to DRAM to verify that each bit in memory can be set and read correctly.

To run the DRAM Test:

1. Select DRAM Test from the menu.

The message DRAM Test Testing… displays. Then the message Resetting Printer appears.

The following type of message appears:

DRAM Test xxx MB
P:###### F:####

• xxx represents the installed DRAM size.

• P:###### represents the number of times the memory test has passed and finished successfully.

Initially, 000000 displays with the maximum pass count being 999,999.

• F:##### represents the number of times the memory test has failed and finished with errors. Initially,

0000 displays with the maximum fail count being 99,999. Initially, only four digits appear, but
additional digits appear as needed.

Each time the printer finishes a test, it increments “P” or “F” by 1 according to the success or failure of the
DRAM.

While the DRAM test executes, the power indicator light blinks green. To stop the test before completion, turn the
printer off.

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Parallel Wrap tests

This test is used with a wrap plug to check operation of the parallel port hardware. Each parallel signal is tested.
Use Parallel Wrap for the standard parallel port, Parallel 1 Wrap if a parallel port is available by PCI slot 1, or
Parallel 2 Wrap if a parallel port is available by PCI slot 2.

To run the Parallel Wrap tests:

1. Disconnect the parallel interface cable, and install the wrap plug (P/N 1319128).

2. Select Parallel Wrap, Parallel 1 Wrap, or Parallel 2 Wrap from the HARDWARE TESTS menu.

The power indicator blinks green, indicating the test is in progress. The test runs continuously until a
maximum number of tests is reached.

Parallel Wrap
P:###### F:####

• P:###### represents the number of times the memory test has passed and finished successfully.

Initially, 000000 displays with the maximum pass count being 999,999.

• F:##### represents the number of times the memory test has failed and finished with errors. Initially,

0000 displays with the maximum fail count being 999,999. Initially, only four digits appear, but
additional digits appear as needed.

Each time the test finishes, the screen updates. If the test passes, the pass counter increases by 1,
however if the test fails, a message displays for approximately three seconds. Once the maximum count is
reached, the test stops. The power indicator goes on solid, and the final results display.

To stop the test before completion, press Stop ().

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DUPLEX TESTS

Quick Test (duplex)

This test prints a duplex version of the Quick Test that can be used to verify that the correct placement of the top
margin on the back side of a duplex page. You can run one duplexed page (Single), or continue printing

duplexed pages (Continuous) until Stop ( ) is pressed. For information about changing the margin, see

“Top/Left Margin (duplex)” on page 3-13.

Note: Before you set the duplex top margin, be sure to set the registration. See “REGISTRATION” on

page 3-4.

The paper you choose to print the page on should be either Letter or A4.

To run the Quick Test (duplex):

1. Select Quick Test from DUPLEX TESTS.

2. Select Single or Continuous.

• The single Duplex Quick test cannot be canceled.

• The printer attempts to print the Quick Test Page from the default paper source. If the default paper

source only supports envelopes, then the page is printed from Tray 1.

• Check the Quick Test Page for the correct offset between the placement of the first scan line on the

front and back side of a duplexed sheet.

The single test stops automatically when a single duplex sheet is printed, and the continuous test continues until
you press Stop (

).

Top/Left Margin (duplex)

This setting controls the offset between the first scan line on the front of the duplex page and the first scan line
on the back of the page. Therefore, be sure to set the top margin in REGISTRATION before setting the duplex
top margin. See “REGISTRATION” on page 3-4.

To set the Top/Left Margin (duplex):

1. Print the Quick Test (duplex):
a. Select Quick Test from DUPLEX TESTS.

b. Select Single.
c. Hold the page to the light to see the whether the top margin of the backside aligns with the top margin

of the frontside.

2. Select Top Margin from DUPLEX TESTS.

3. Use or to select the margin setting you need to change.

• Each increment shifts the duplex top margin by 1/100 of an inch.

• The Top Margin (duplex) range is -20 to +20, and the default value is 0.

• An increase moves the top margin down and widens the top margin. A decrease moves the top

margin upward and narrows the top margin.

4. Press .

5. Print the Quick Test (duplex) again to verify the adjustment. Repeat if necessary.

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Sensor Test (duplex)

This test is used to determine whether or not the duplex sensors and switches are working correctly. The test
allows you to actuate the duplex input sensor located in the back part of the duplex unit and the duplex exit
sensor located in the return paper path.

1. Select Sensor Test from DUPLEX TESTS.

The message Sensor Test Testing displays.

2. Manually actuate each of the duplex sensors. When the sensor/switch is closed, CL (closed) displays, and

when the sensor/switch is open, OP (open) displays.

• Duplex input sensor

• Duplex exit sensor

3. Press Back ( ) or Stop ( ) to exit the test.

Duplex Feed 1

This test feeds a blank sheet of paper to the duplex paper stop position 1. This test can be run using any of the
supported paper sizes.

To run the Duplex Feed 1 Test:

1. Select Duplex Feed 1 from DUPLEX TESTS.

The power indicator blinks while the paper is feeding, and the message Duplex Feed 1 Feeding…
displays.

The message Duplex Feed 1 Clear Paper displays when the paper reaches paper stop position 1,
and the power indicator turns on solid.

2. Remove the media from the duplex unit, and clear the message on the operator panel by pressing Stop

( ).

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INPUT TRAY TESTS

Feed Tests (input tray)

This test lets the servicer observe the paper path as media is feeding through the printer. A blank sheet of paper
feeds through the printer as the laser turns off during this test. The paper is placed in the output bin.

To run the Input Tray Feed Tests:

1. Select Feed Tests from INPUT TRAY TESTS.

2. Select the input source from the sources displayed on the Feed Tests menu. All installed sources are listed.

3. Select either Single or Continuous.

• Single—feeds one sheet of media from the selected source.

• Continuous—media continues feeding from the selected source until Stop ( ) is pressed.

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OUTPUT BIN TESTS

Feed Tests (output bins)

Use these tests to verify that media can be fed to a specific output bin. Media is fed from the default input source
to the selected output bin. No information is printed on the media fed to the output bin because the printhead is
not engaged during this test. These tests can use any media size or envelope supported by the printer.

To run the Feed Tests for the output bins:

1. Select Feed Tests from the OUTPUT BIN TESTS.

2. Select the output bin you want the paper to exit into. The standard bin as well as any output option bin

installed on the printer is shown on the menu. (The output bins are displayed in the order installed on the
printer.)

3. Select either Single or Continuous.

• Single—feeds one sheet of media from the selected source.

• Continuous—media continues feeding from the selected source until Stop ( ) is pressed.

Press Back ( ) to return to OUTPUT BIN TESTS.

Sensor Test (standard output bin)

This test is used to verify if the standard bin sensor is working correctly.

To run the Sensor Test for the standard bin:

1. Select Sensor Test from OUTPUT BIN TESTS.

2. Select Standard Bin from Sensor Tests.

3. Select NearFull or Full sensor to test.

The following screen is displayed:

Standard Bin x
Full=Open NearFull=Open

• Full—Bin full sensor

• NearFull—Bin near full sensor

4. Manually actuate the bin sensor by moving the flag in and out of the sensor. The display indicates Open

when the flag is out of the sensor and Closed when the flag is in the sensor.

5. Press Back () or Stop ( ) to exit the test.

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BASE SENSOR TEST

This test is used to determine if the sensors located inside the printer are working correctly.

To run the Base Sensor Test:

1. Select BASE SENSOR TEST from the DIAGNOSTICS menu.

The following sensors are listed:

• Exit—Exit sensor

• Front Door—Front door sensor

• Input—Input sensor

2. Manually actuate the sensors to verify that each sensor switches from Open to Closed.

3. Press Back () or Stop ( ) to exit the test.

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PRINTER SETUP

Defaults

US/Non-US defaults changes whether the printer uses the US factory defaults or the non-US factory defaults.
The settings affected include paper size, envelope size, PCL symbol set, code pages, and units of measure.

Warning: Changing this setting resets the printer to factory defaults, and data may be lost. It cannot be undone.

Page Count

The page count can only be viewed and cannot be changed.

To view the page count:

1. Select Page Count from PRINTER SETUP.

2. Press Back ( ) to return to PRINTER SETUP.

Perm Page Count (permanent page count)

The permanent page count can only be viewed and cannot be changed.

To view the permanent page count:

1. Select Perm Page Count from PRINTER SETUP.

2. Press Back ( ) to return to PRINTER SETUP.

Serial Number

The serial number can only be viewed and cannot be changed.

To view the serial number:

1. Select Serial number from PRINTER SETUP.

2. Press Back ( ) to return to PRINTER SETUP.

Engine Setting 1 through 4

Warning: Do not change these settings unless requested to do so by your next level of support.

Model Name

The model name can only be viewed and cannot be changed.

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Configuration ID

The two configuration IDs are used to communicate information about certain areas of the printer that cannot be
determined using hardware sensors. The configuration IDs are originally set at the factory when the printer is
manufactured, however the servicer may need to reset Configuration ID 1 or Configuration ID 2 whenever you
replace the system board. The IDs consist of eight hexadecimal characters, including 0 through 9 and A
through F.

Note: When the printer detects a Configuration ID that is not defined or invalid, the following occurs:

• The default standard model Configuration ID is used instead.

• Configuration ID is the only function available in DIAGNOSTICS.

• Unless the menu is in DIAGNOSTICS, Check Config ID displays.

To set the configuration ID:

1. Select Printer Setup from the Diagnostic mode.

2. Select Configuration ID from the Printer Setup menu.

Submitting Selection displays, followed by the value for Configuration ID 1.

3. Enter the Configuration ID 1.

• To select a digit or character to change, press or until the digit or character is underlined.

• To change a digit or character, press to increase or to decrease the value.

• When the last digit is changed, press to validate the Configuration ID 1.

If Invalid ID appears, the entry is discarded, and the previous Configuration ID 1 is displayed on
the screen.
If the process is successful, Submitting Selection appears on the display, followed by the
current value for Confirguration ID 2.

4. Repeat the steps for entering the Configuration ID, and press .

If the Configuration ID 2 is validated, Submitting Selection appears, and a check ( ) appears next
to Printer Setup.

5. Restart the printer.

Edge to Edge

When this setting is On, the text and graphics are shifted to the physical edges of the paper for all margins.
When the setting is Off, the normal margins are restored.

Parallel strobe adjustment (Par x Strobe Adj)

This setting adjusts the amount of time the strobe is sampled in order to determine if the valid data is available
on the parallel port. The range of values are from -4 to 6, and the default is 0 for Par S Strobe Adj,
Par 1 Strobe Adj, and Par 2 Strobe Adj. After adjustment of 1 increment, the strobe samples 50 ns longer.

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EP SETUP

EP Defaults

This setting is used to restore each printer setting listed in EP SETUP to its factory default value. Sometimes this
is used to help correct print quality problems.

To restore EP Defaults:

1. Select EP Defaults from EP SETUP.

2. Select Restore to reset the values to the factory settings, and select Do Not Restore to exit without

changing the settings.

Fuser Temperature (Fuser Temp)

This adjustment can be used to help solve some customer problems with paper curl on low grade papers and
problems with letterheads on some types of media.

The fuser temperature can be adjusted to: Normal, Lower, Lowest. The default is Normal.

Transfer

The transfer can be adjusted to Low, Medium, or High. The default setting is Medium.

Print Contrast

The print contrast setting controls the developer voltage offset.

The print contrast can be adjusted to Low, Medium, or High. The default setting is Medium.

Charge Roll

The charge roll can be adjusted to Low, Medium, or High. The default setting is Medium.

Gap Adjust

The setting adjusts the minimum gap between sheets. Increasing this value may reduce curl of some printed
media and eliminate some output bin stacking problems. However, increasing this value also results in slower
overall performance, measured in pages per minute. The range of values is 0 to 255, and the default value is 0.

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EVENT LOG

Display Log

The event log provides a history of printer errors. It contains the 12 most recent errors that have occurred on the
printer. The most recent error displays in position 1, and the oldest error displays in position 12 (if 12 errors have
occurred). If an error occurs after the log is full, the oldest error is discarded. Identical errors in consecutive
positions in the log are entered, so there may be repetitions. All 2xx and 9xx error messages are stored in the
event log.

To view the event log:

1. Select Display Log from EVENT LOG.

Up to three error codes display at a time. Press or to view additional error codes.

2. Press Back ( ) to return to the EVENT LOG menu.

Print Log

Additional diagnostic information is available when you print the event log from DIAGNOSTICS rather than
CONFIG MENU.

The Event Log printed from DIAGNOSTICS includes:

• Detailed printer information, including code versions

• Time and date stamps

• Page counts for most errors

• Additional debug information in some cases

The printed event log can be faxed to Lexmark or your next level of support for verification or diagnosis.

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To print the event log:

Select Print Log from EVENT LOG.

Press Back (

Clear Log

Use Clear Log to remove the current information in the Event Log. This affects both the viewed log and the
printed log information.

1. Select Clear Log from the Event Log menu.

2. Select YES to clear the Event Log or NO to exit the Clear Log menu. If YES is selected, Deleting EVENT

LOG displays on the screen.

Press Back (

EXIT DIAGNOSTICS

This selection exits Diagnostics mode, and Resetting the Printer displays. The printer performs a POR,
and the printer returns to normal mode.

) to return to EVENT LOG.

) to return to EVENT LOG.

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Configuration menu (CONFIG MENU)

Entering Configuration Menu

1. Turn off the printer.

2. Press and hold and .

3. Turn on the printer.

4. Release the buttons when Performing Self Test displays.

The message CONFIG MENU displays on the top line of the operator panel.

Available menus

Maint Cnt Value See “Maintenance page count (Maint Cnt Value)” on page 3-23
Reset Maint Cnt See “Maintenance page counter reset (Reset Maint Cnt)” on

Reset PC Cnt
Prt Quality Pgs See “Print quality pages (Prt Quality Pgs)” on page 3-24
Panel Menus See “Panel Menus” on page 3-24
PPDS Emulation See “PPDS Emulation” on page 3-24
Demo Mode See “Demo Mode” on page 3-24
Factory Defaults See “Factory Defaults” on page 3-25
Energy Conserve See “Energy Conserve” on page 3-25
EVENT LOG (print log only) See “EVENT LOG” on page 3-25
Paper Prompts See “Paper Prompts” on page 3-25
Env Prompts See “Env Prompts” on page 3-25
Change Prompts See “Change Prompts” on page 3-25
Reduce Curl See “Reduced Curl” on page 3-25
USB Speed See “USB Speed” on page 3-25
Exit Config Menu See “Exit Config Menu” on page 3-26

page 3-24

Some menus are not available, depending on the configuration of the printer.

Maintenance page count (Maint Cnt Value)

The current value for the maintenance page counter is displayed. This counter tracks printer usage. A print job
containing a single page increments the counter by one and a duplex page by two. At 300,000, the customer is
reminded that the printer requires scheduled maintenance. This counter is reset by the servicer after a 80
Scheduled Maintenance message displays and a maintenance kit is installed. See “Maintenance kit” on

page 6-1 for the part number.

To view the maintenance page count:

1. Select Maint Cnt Value from CONFIG MENU.

2. Press to view the value.

Press Back ( ) to return to the main Configuration menu.

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Maintenance page counter reset (Reset Maint Cnt)

After scheduled maintenance, the servicer needs to reset the page counter.

To reset the maintenance page count to zero:

Select Reset Maintenance Count from the Configuration menu.

The message Reset Maint Cnt=Reset displays momentarily. When the reset operation is complete, the
menu returns to the Printer Setup Reset Maintenance Count screen.

Print quality pages (Prt Quality Pgs)

The print quality test pages can be printed from either the Diagnostics mode or Configuration Menu (CONFIG
MENU). When printed from the Diagnostic mode, additional information is included, and the print cartridge
lockout is bypassed. See “Print quality pages (Prt Quality Pgs)” on page 3-10. Additional configuration
information may be included on the print quality pages which is not included on the print menu page.

To print the Print Quality Test Pages, select Prt Quality Pgs from CONFIG MENU. The message Printing
Quality Test Pages is displayed.

The following is printed:

• Settings from EP SETUP from DIAGNOSTICS:

Fuser temperature, warm up time, transfer, print contrast, and charge roll settings.

• Contents of the EVENT LOG from DIAGNOSTICS.

• Printer configuration information:

Printer serial number, controller code level, engine code level, operator panel code level, smart option code
levels, font versions, and so on.

Values for the QUALITY MENU settings used to print the pages.

The print quality test consists of four pages. Page one contains a mixture of graphics and text. Pages two and
three only contain graphics. Page four is blank. If duplex is turned on, the pages are duplexed. The Print Quality
Test pages are printed in English and must always be printed on letter, legal, or A4 paper.

Panel Menus

Settings are Disable and Enable. The default is Enable.

PPDS Emulation

This menu item allows the user to enable or disable PPDS emulation data stream. When this setting is enabled,
the following settings are also changed:

• SmartSwitch settings for each port are turned off.

• The printer language is changed to PPDS Emulation.

Users can still switch languages on the operator panel and through the PJL data stream.

Demo Mode

There is a built-in demonstration mode. The settings allow you to Deactivate to turn off the demo mode and
Activate to turn it on. While Demo Mode is set, the printer will start in Demo Mode until you change the setting.

Note: While Demo Mode is set to Activate, only demonstration files can print, and files received across

the network or from the host computer are ignored.

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Factory Defaults

This setting enables a user to restore all the printer settings to the original factory settings. Selections are
Restore Base and Restore Network. Network does not appear unless you have a network printer. The
following settings are not changed:

• Display language

• Settings in the NETWORK/PORTS MENU group.

Energy Conserve

This menu controls what values appear on the Power Saver menu. If Off is selected in Energy Conserve menu,
then Disabled appears in the Power Saver menu and Power Saver can be turned off. If On is set in Energy
Conserve, the Power Saver feature cannot be disabled.

EVENT LOG

The event log provides a history of printer errors. The event log can only be printed in CONFIG MENU.
Additional options are available in DIAGNOSTICS. See “EVENT LOG” on page 3-21.

To print the event log:

1. Select Print Log from EVENT LOG.

2. Press Back ( ) or Stop ( ) to return to EVENT LOG.

Note: An event log printed from the CONFIG MENU will not contain debug information or secondary codes for

900 service errors. However, the event log printed from DIAGNOSTICS mode does include this information.

Paper Prompts

When a tray is out of the indicated paper size, a prompt is sent to the user to load paper in a tray. This setting
controls the tray the user is directed to fill. Selections are Auto (default), MP Feeder, and Manual Paper.

Env Prompts

This setting controls the tray the user is directed to refill when a specific envelope size is out. The selections are
Auto (default), MP Feeder, and Manual Env.

Change Prompts

The value of this setting determines if the device displays any of the Change prompts.

Reduced Curl

This setting will cause the engine throughput to be significantly reduced if it is enabled. This mode will only be
used if the media being printed is “Paper.” This setting is available as a last resort to help improve paper curl
problems.

USB Speed

A value of “Full” forces the USB port to run at full sped and also disables its high-speed capabilities.

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Exit Config Menu

Press to exit the CONFIG MENU. The message Resetting the Printer displays, and the printer
performs a POR and restarts in normal mode.

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4. Repair information

Warning: Read the following before handling electronic parts.

Handling ESD-sensitive parts

Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent
damage to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such as
turning off power before removing logic cards:

• Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until the

part is ready to be installed into the printer.

• Make the least-possible body movements to prevent an increase of static electricity from

clothing fibers, carpets, and furniture.

• Put the ESD wrist strap on your wrist. Connect the wrist band to the system ground point. This

discharges any static electricity in your body to the printer.

• Hold the ESD-sensitive part by its edge connector shroud (cover); do not touch its pins. If a

pluggable module is being removed, use the correct tool.

• Do not place the ESD-sensitive part on the MFP cover or on a metal table; if the ESD-

sensitive part needs to be put down for any reason, first put it into its special bag.

• Machine covers and metal tables are electrical grounds. They increase the risk of damage

because they make a discharge path from your body through the ESD-sensitive part. (Large
metal objects can be discharge paths without being grounded.)

• Prevent ESD-sensitive parts from being accidentally touched by other personnel. Install

machine covers when the machine is not being worked on, and do not put unprotected ESD­sensitive parts on a table.

• If possible, keep all ESD-sensitive parts in a grounded metal cabinet (case).

• Be extra careful in working with ESD-sensitive parts when cold-weather heating is used,

because low humidity increases static electricity.

Removal procedures

Note:

1. Remove the toner cartridge and media tray before removing other printer parts. The toner cartridge should

be protected from light while out of the printer.

2. We recommend disconnecting all external cables from the printer to prevent damage during service.

3. Unless otherwise stated, reinstall the parts in reverse order of removal.

4. When reinstalling a part held with several screws, start all screws before final tightening.

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Front access cover removal

Remove Tray 1.

1.

2. Open the front access cover.

3. Open the rear door and the right side cover.

4. Loosen the four screws, and remove the controller card cover.

5. Disconnect the operator panel cable (A) from J3 on the controller card.

6. Extract the cable, and unhook the access cover by pressing the right hinge to the right until it can be lifted

up and away from its pivot. Relax the hinge above the pivot.

7. In the same manner, move the left hinge from its pivot point.

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8. Tilt the front cover down, and disconnect it on the left side from the link.

Warning: Make sure that the link is not bent or pulled out farther than normal. Otherwise, the toner cartridge

coupler may become dislodged.

9. Remove the front access cover.

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Left side cover removal

Remove Tray 1.

1.

2. Open the front access cover.

3. Open the rear door.

4. Remove the screw (A).

5. Unlatch the cover from the latches (B).

6. Position the printer with the left rear corner hanging over the edge of the table.

7. Swing the cover open.

8. Lift the top rear of the cover over the pivot point, and drop the cover away from the printer.

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Right side cover removal

Remove Tray 1.

1.

2. Open the front access cover.

3. Open the rear door.

4. Release the latches (A), and swing the cover open.

5. Position the printer with the right rear corner hanging over the edge of the table.

6. Lift the top rear of the cover over the pivot point, and drop the cover away from the printer.

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Rear cover removal

Remove the right side cover. See “Right side cover removal” on page 4-5.

1.

2. Remove the left side cover. See “Left side cover removal” on page 4-4.

3. Remove the two screws (A).

4. Open the rear cover.

5. Lift the rear cover, unhooking it from the frame at the bottom, and remove.

Note: In re-installation, check to make sure that the fuser ground cable is routed out of the way and is not

pinched or damaged.

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Top cover removal

Remove the right side cover. See “Right side cover removal” on page 4-5.

1.

2. Remove the left side cover. See “Left side cover removal” on page 4-4.

3. Open the rear door.

4. Remove the two screws (A) from the two front corners on the top cover, the two screws (B) from the two

rear corners on the top cover, and the screw (C) on the left side.

5. Open the front cover.

6. Remove the two screws (D).

AB BC

D

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7. Disconnect the cable (E) of the narrow media sensor from J10 on the controller card.

8. Free the cable while noting which top frame opening it goes through.

9. Release the latches (F) on both sides to unhook the top cover.

10. Lift and remove the top cover.

Installation note:

• Be sure to re-route the cable back through the same hole.

• Be sure that the ground strap aligns at screw (C).

• Verify the proper alignment of the top cover with the paper exit guide along the mating edges at the rear of

the exit tray.

• Verify that the rollers in the top cover contact the exit guide rollers at the top rear. There are arrows under

the top cover to verify the location of the rollers.

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Auto comp removal

Remove the duplex. See “Duplex removal” on page 4-18.

1.

2. Remove the screw that holds the ACM link.

3. Remove the ACM link and hub. See “Auto comp clutch removal” on page 4-10.

4. Use a spring hook or a small screwdriver to rotate the latch toward the bottom of the printer until it is

pointing downward.

5. Lay the printer on its top. Be sure to protect it from marring.

6. Raise the auto comp, and unhook the counter balance spring (A).

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7. Rotate the arm, and pull to remove the auto comp.

Auto comp clutch removal

Remove the left side cover. See “Left side cover removal” on page 4-4.

1.

2. Remove the main motor drive. See “Main motor drive removal” on page 4-28.

3. Remove the screw (A).

Note: Resistance to loosening the screw may have to be applied to the shaft. Use a finger or small screwdriver

against the coupler behind the clutch.

4. Remove the ACM clutch.

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Auto comp drive shaft assembly removal

Remove the auto comp clutch. See “Auto comp clutch removal” on page 4-10.

1.

2. Use a spring hook or a small screwdriver to dislodge the arm of the shaft bushing, and rotate the arm

counterclockwise as far as it will go.

3. With the bushing aligned with the frame opening for clearance, unsnap the shaft from the ACM.

4. Remove the auto comp drive shaft assembly.

5. Use a screwdriver to align the ACM with the shaft bearing to help in installation.

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Bezel removal

Open the front access cover.

1.

2. Remove the two screws (A).

A

3. Lift the lower edge of the shield, slide it to the right, and remove.

4. Release the four inner latches (B).

5. Remove the bezel and lens while the door remains open.

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Controller card removal

Warning:

• Always touch a ground before touching the card.

• Handle the card carefully by the edges.

• Never replace the operator panel and controller card at the same time without a successful POR in

between.

1. Remove the right side cover. See“Right side cover removal” on page 4-5.

2. Remove the controller card cover.

3. Disconnect all the cables from the controller card, and remove cables from the shield housing.

Warning: Do not replace the controller card and the operator panel at the same time. Each card contains the

printer settings. When either of these cards is new, it obtains its settings from the other card. Critical
factory settings are lost when both are new and replaced at the same time.

4. Remove the four screws (A) that are securing the controller card.

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5. Remove the three screws (B) securing the USB port and the parallel ports.

6. Lift and remove the card.

Re-installation note: When replacing the controller card, make sure to route all of the cables through the

correct shield opening. Make sure that the ground wire that is being held by the front, upper screw is in the
correct location before installing.

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Cover open sensor removal

Remove Tray 1.

1.

2. Open the front cover.

3. Open the right side cover. See steps 1 and 2 of “Right side cover removal” on page 4-5.

4. Remove the controller card cover.

5. Loosen the one screw (A) from the shield that protects the sensor.

6. Disconnect the cable from J6 on the controller card.

Note: The cable is secured with a toroid. Be sure to remove the toroid before disconnecting the cable.

7. Use a small Phillips screwdriver to remove the screw (B) holding the sensor.

8. Remove the cover open sensor.

Reinstallation note:

• Be sure to re-route the cable back through its retainer.

• Be sure to place the toroid back over the cable.

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Developer drive coupling assembly removal

Remove the left side cover. See “Left side cover removal” on page 4-4.

1.

2. Place the machine on its right side.

Note: Be sure to protect the machine from marring.

3. Remove the five screws (A), the machine screw (B), and the ground cable screw (C).

4. Lift the main motor drive, and disconnect the motor cable (D).

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