Xerox PHASER 8400 User manual

Phaser

®

8400/8500/8550 Color

Printer

Service Manual

Warning

The following servicing instructions are for use by qualified service

personnel only. To avoid personal injury, do not perform any servicing other

than that contained in the operating instructions, unless you are qualified to

do so.

December, 2005

721P58550

http://printer1.blogspot.com

copyright laws of the United States. Contents of this publication may not be reproduced in any form

without permission of Xerox Corporation.

Copyright protection claimed includes all forms of matters of copyrightable materials and information now

allowed by statutory or judicial law or hereinafter granted, including without limitation, material generated

from the software programs which are displayed on the screen such as styles, templates, icons, screen

displays, looks, etc.

XEROX

®

, The Document Company

®

, the digital X

®

, CentreWare

®

, FinePoint

™

,

infoSMART

®

,

Made For

Each Other

®

, PagePack

™

, Phaser

®

, PhaserSMART

®

, TekColor

™

, and Walk-Up

™

are trademarks of Xerox

Corporation in the United States and/or other countries.

Acrobat

®

, Adobe

®

Reader

®

, Adobe Type Manager

®

, ATM

™

, Illustrator

®

, PageMaker

®

, Photoshop

®

,

PostScript

®

, Adobe Brilliant

®

Screens, Adobe Garamond

®

, Adobe Jenson

™

, Birch

®

, Carta

®

,

IntelliSelect

®

, Mythos

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, Quake

®

, and Tekton

®

are trademarks of Adobe Systems Incorporated in the

United States and/or other countries.

Apple

®

, AppleTalk

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, EtherTalk

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, LaserWriter

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, LocalTalk

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, Macintosh

®

, Mac

OS

®

, TrueType

®

, Apple

Chancery

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, Chicago

®

, Geneva

®

, Monaco

®

, New York

®

, and QuickDraw

®

are trademarks of Apple

Computer, Inc. in the United States and/or other countries.

HP-GL

®

, HP-UX

®

, and PCL

®

are trademarks of Hewlett-Packard Corporation in the United States and/or

other countries.

IBM

®

and AIX

®

are trademarks of International Business Machines Corporation in the United States and/

or other countries.

Windows

®

, Windows NT

®

, Windows Server

™

, and Wingdings

®

are trademarks of Microsoft Corporation

in the United States and/or other countries.

Novell

®

, NetWare

®

, NDPS

®

, NDS

®

, Novell Directory Services

®

, IPX

™

, and Novell Distributed Print

Services

™

are trademarks of Novell, Incorporated in the United States and/or other countries.

Sun

SM

, Sun Microsystems

™

, and Solaris

®

are trademarks of Sun Microsystems, Incorporated in the United

States and/or other countries.

SWOP

®

is a trademark of SWOP, Inc.

UNIX

®

is a trademark in the United States and other countries, licensed exclusively through X/Open

Company Limited.

As an E

NERGY STAR

®

partner, Xerox Corporation has determined that this product with an ES Option

meets the E

NERGY STAR guidelines for energy efficiency. The ENERGY STAR name and logo are registered

U.S. marks.

PANTONE

®

Colors generated may not match PANTONE-identified standards. Consult current PANTONE

Publications for accurate color. PANTONE

®

and other Pantone, Inc. trademarks are the property of

Pantone, Inc. © Pantone, Inc., 2000.

Service Manual i

User Safety Summary

Terms in Manual

Caution

Conditions that can result in damage to the product.

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Conditions that can result in personal injury or loss of life.

Power source:

For 110 VAC printers, do not apply more than 130 volts RMS

between the supply conductors or between either supply conductor and ground. Use

only the specified power cord and connector. For 220 VAC printers, do not apply

more than 250 volts RMS between the supply conductors or between either supply

conductor and ground. Use only the specified power cord and connector. Refer to a

qualified service technician for changes to the cord or connector.

Operation of product: Avoid electric shock by contacting a qualified service

technician to replace fuses inside the product. Do not operate without the covers and

panels properly installed. Do not operate in an atmosphere of explosive gases.

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Turning the power off using the On/Off switch does not de-energize the

printer. You must remove the power cord to disconnect the printer from the

mains. Keep the power cord accessible for removal in case of an emergency.

Safety instructions: Read all installation instructions carefully before you plug the

product into a power source.

Terms on

Product

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i

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A personal injury hazard exists that may not be apparent. For example, a

panel may cover the hazardous area. Also applies to a hazard to property

including the product itself.

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i

ng

Personal injury hazard exists in the area where you see the sign.

Care of product: Disconnect the power plug by pulling the plug, not the cord.

Disconnect the power plug if the power cord or plug is frayed or otherwise damaged,

if you spill anything into the case, if product is exposed to any excess moisture, if

product is dropped or damaged, if you suspect that the product needs servicing or

repair, and whenever you clean the product.

ii Phaser 8400/8500/8550 Color Printer

Ground the product: Plug the three-wire power cord (with grounding prong) into

grounded AC outlets only. If necessary, contact a licensed electrician to install a

properly grounded outlet.

Symbols as marked on product:

DANGER high voltage:

Protective ground (earth) terminal:

Use caution. Refer to the manual(s) for information:

WARNING: If the product loses the ground connection, usage of knobs and controls

(and other conductive parts) can cause an electrical shock. Electrical product may be

hazardous if misused.

Service Safety Summary

For qualified service personnel only: Refer also to the preceding Users Safety

Summary.

Do not service alone:

Do not perform internal service or adjustment of this

product unless another person capable of rendering first aid or resuscitation is present.

Use care when servicing with power on: Dangerous voltages may exist at

several points in this product. To avoid personal injury, do not touch exposed

connections and components while power is on.

Disconnect power before removing the power supply shield, soldering, or replacing

components.

Do not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces, and

other metallic objects could come into contact with dangerous voltages and currents.

Power source: This product is intended to operate from a power source that will not

apply more than 250 volts rms between the supply conductors or between either

supply conductor and ground. A protective ground connection by way of the

grounding conductor in the power cord is essential for safe operation.

Service Manual iii

Regulatory Specifications

United States

Xerox has tested this product to electromagnetic emission and immunity standards.

These standards are designed to mitigate interference caused or received by this

product in a typical office environment.

United States (FCC Regulations)

This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses, and can radiate radio frequency energy.

If it is not installed and used in accordance with these instructions, it may cause

harmful interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause

harmful interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct the

interference by one or more of the following measures:

■ Reorient or relocate the receiver.

■ Increase the separation between the equipment and receiver.

■ Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

■ Consult the dealer or an experienced radio/television technician for help.

Any changes or modifications not expressly approved by Xerox could void the user's

authority to operate the equipment. To ensure compliance with Part 15 of the FCC

rules, use shielded interface cables.

Canada (Regulations)

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

European Union (Declaration of Conformity)

Xerox Corporation declares, under our sole responsibility, that the product to which

this declaration relates is in conformity with the following standards and other

normative documents:

iv Phaser 8400/8500/8550 Color Printer

Low Voltage Directive 73/23/EEC as amended

Electromagnetic Compatibility Directive 89/336/EEC as amended

Radio & Telecommunications Terminal Equipment Directive 1999/5/EC

as amended

This product, if used properly in accordance with the user's instructions, is neither

dangerous for the consumer nor for the environment.

A signed copy of the Declaration of Conformity for this product can be obtained from

Xerox.

EN 60950:2000

EN 55022:1998+A1:2000 +A2:2003

EN 55024:1998+A1:2000 +A2:2003

EN 61000-3-2:2000

EN 61000-3-3:1995+A1:2000

EN 300 330-2 V1.1.1

EN 300 440-2 V1.1.1

EN 301 489-3 V1.3.1

Service Manual v

Electrostatic Discharge (ESD) Precautions

Some semiconductor components, and the respective sub-assemblies that contain

them, are vulnerable to damage by Electrostatic discharge (ESD). These components

include Integrated Circuits (ICs). Large-Scale Integrated circuits (LSIs), field-effect

transistors and other semiconductor chip components. The following techniques will

reduce the occurrence of component damage caused by static electricity.

Be sure the power is off to the chassis or circuit board, and observe all other safety

precautions.

■ Immediately before handling any semiconductor components assemblies, drain

the electrostatic charge from your body. This can be accomplished by touching an

earth ground source or by wearing a wrist strap device connected to an earth

ground source. Wearing a wrist strap will also prevent accumulation of additional

bodily static charges. Be sure to remove the wrist strap before applying power to

the unit under test to avoid potential shock.

■ After removing a static sensitivity assembly from its anti-static bag, place it on a

grounded conductive surface. If the anti-static bag is conductive, you may ground

the bag and use it as a conductive surface.

■ Do not use freon-propelled chemicals. These can generate electrical charges

sufficient to damage some devices.

■ Do not remove a replacement component or electrical sub-assembly from its

protective package until you are ready to install it.

■ Immediately before removing the protective material from the leads of a

replacement device, touch the protective material to the chassis or circuit

assembly into which the device will be installed.

■ Minimize body motions when handling unpacked replacement devices. Motion

such as your clothes brushing together, or lifting a foot from a carpeted floor can

generate enough static electricity to damage an electro-statically sensitive device.

■ Handle IC’s and EPROM’s carefully to avoid bending pins.

■ Pay attention to the direction of parts when mounting or inserting them on

Printed Circuit Boards (PCB’s).

Service Manual

Contents

User Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Regulatory Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Electrostatic Discharge (ESD) Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . v

1 General Information

Printer Introduction and Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Printer Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Control Panel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Control Panel Feature Descriptions. . . . . . . . . . . . . . . . . . . . . . . . 1-5

Menu Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Control Panel Shortcuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Parts of the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Front View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Right Side View with Printer Interfaces. . . . . . . . . . . . . . . . . . . . . 1-7

Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Routine Maintenance Items and Consumables. . . . . . . . . . . . . . . . . . . . . 1-9

Printer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Physical Dimensions and Clearances . . . . . . . . . . . . . . . . . . . . . 1-10

Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Media and Tray Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

2 Theory of Operation

Main Printer Subsystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Printer Subsystem Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Process Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Media Path Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Ink Loader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Drum Maintenance System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Purge System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Drum Assembly And Transfix System . . . . . . . . . . . . . . . . . . . . 2-16

Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

I/O Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Print Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Drum Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Paper Pick for Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25

Paper Pick for Trays 2 - 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Transfixing and Exiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Phaser 8400/8500/8550 Color Printer

Duplex Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

Transfix and Print Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

Printer Self-Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33

Printhead Maintenance Cycle (Eliminate Light Stripes) . . . . . . . 2-33

Paper Preheater Cleaning (Remove Print Smears). . . . . . . . . . . 2-34

Transfix Roller Oiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34

Drum Cleaning - Chase Page . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34

Configuration Card Personality Parameters. . . . . . . . . . . . . . . . . . . . . . 2-35

3 Error Messages and Codes

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Power-Up Error Messages and LED Codes . . . . . . . . . . . . . . . . . . . . . . . 3-3

BIST Error Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

POST Error Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

PEST Error Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Fault Code Error Message Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . 3-9

Fault Code Error Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Interpreting Fault Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

1,000.4x Error - 525-Sheet Feeder Faults . . . . . . . . . . . . . . . . . 3-10

2,0XX.4x Error - I/O Circuit Board Fault . . . . . . . . . . . . . . . . . . . 3-11

3,0XX.6x - IPC Program Faults . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

4,0XX.4x Errors - Process Control System Fault . . . . . . . . . . . . 3-13

5,0XX.4x Errors - Y-Axis Sub-System Fault . . . . . . . . . . . . . . . . 3-16

6,0XX.4x Errors - X-Axis Fault . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

7,0XX.4x Errors - Process Motor Gearbox Faults. . . . . . . . . . . . 3-19

8,0XX.xx Error - Wiper/Media Path Gearbox Faults . . . . . . . . . . 3-24

9,0XX.xx Errors - Ink Loader Faults . . . . . . . . . . . . . . . . . . . . . . 3-26

11,0XX.xx Errors - Electronics Module Interface Fault. . . . . . . . 3-27

13,0XX.xx Errors - Thermal Faults . . . . . . . . . . . . . . . . . . . . . . . 3-29

19,0XX.xx Errors - Printhead Calibration faults.. . . . . . . . . . . . . 3-36

31,0XX.4x Errors - Mechanical Initialization Jam. . . . . . . . . . . . 3-37

33,0XX.xx Errors - Tray Manager Device Faults. . . . . . . . . . . . . 3-39

34,0XX.xx Errors - Printhead NVRAM Faults . . . . . . . . . . . . . . . 3-39

36,000.40 Errors - Drum Maintenance Faults . . . . . . . . . . . . . . 3-40

37,0XX.xx Errors - PEST Faults . . . . . . . . . . . . . . . . . . . . . . . . . 3-41

Jam Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55

Jam Code Definition Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57

4 General Troubleshooting

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Hidden Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Service Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Service Diagnostics Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Service Diagnostics Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Service Manual

Check Menu Definition Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Check / Activators Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Check Shafts Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Check Paper Path Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20

Check Drive Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35

Check Drum Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42

Check Motors Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-48

Check Misc Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53

Electronics Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59

Printer Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59

Mechanical Initialization (8400) . . . . . . . . . . . . . . . . . . . . . . . . . 4-60

Mechanical Initialization (8500/8550). . . . . . . . . . . . . . . . . . . . . 4-62

Miscellaneous Electrical Troubleshooting. . . . . . . . . . . . . . . . . . 4-65

Verifying Power Supply Operation . . . . . . . . . . . . . . . . . . . . . . . 4-75

Measuring AC Power Supply Voltages . . . . . . . . . . . . . . . . . . . . 4-75

Measuring DC Power Supply Voltages . . . . . . . . . . . . . . . . . . . . 4-76

Ensuring Ground Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-77

Testing Motor and Solenoid Resistances . . . . . . . . . . . . . . . . . . 4-78

Paper Path and Media-Based Problems . . . . . . . . . . . . . . . . . . . . . . . . . 4-79

Media-Based Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-79

Paper-Pick Errors - Trays 2, 3, and 4 . . . . . . . . . . . . . . . . . . . . . 4-79

Paper-Pick Errors - Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-80

Preheater and Transfix Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-80

Checking the Process and Media Path Drive. . . . . . . . . . . . . . . . 4-81

Media Skews Passing Through the Paper Path. . . . . . . . . . . . . . 4-81

Operating System and Application Problems . . . . . . . . . . . . . . . . . . . . . 4-82

Testing Communications Ports. . . . . . . . . . . . . . . . . . . . . . . . . . 4-82

Network Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-84

Obtaining Serial Back Channel Trace . . . . . . . . . . . . . . . . . . . . . 4-85

5 Print-Quality Troubleshooting

Print-Quality Problems Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Random Light Stripes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Predominate Light Stripes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Smudges or Smears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Printing Too Light or Too Dark . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Not Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Color is Uneven or Color is Wrong . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Streaks or Lines Down the Print . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

Scratches or Marks Parallel to the Long Axis of Printing,

Particularly with Film . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

White Portion of Print is Colored . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Fuzzy Text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

Ghosting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

Poor Small Text Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Vertical Lines Appear Wavy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-23

Phaser 8400/8500/8550 Color Printer

Oil Streaks on Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Incomplete Image Transfer to Paper . . . . . . . . . . . . . . . . . . . . . 5-26

Ink Smears on First Printed Side of Duplex Print. . . . . . . . . . . . 5-28

Repeating Print Defects on Print . . . . . . . . . . . . . . . . . . . . . . . . 5-29

White Stripes (Pinstripes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30

Wrinkling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31

Image Is Offset or Cut-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32

Poor Ink Adhesion, Poor Image Durability. . . . . . . . . . . . . . . . . 5-32

Analyzing Service Test Prints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33

Test Print Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33

6 Adjustments and Calibrations

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Wiper Alignment Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Printer Component Homing Positions and Indicators . . . . . . . . . 6-4

Wiper Assembly Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Homing the Head Tilt Gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Homing the Process Gear Drive Train . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Printer Calibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Wiper Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Jet Substitution Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

Enabling Jet Substitution Mode (8400) . . . . . . . . . . . . . . . . . . . 6-11

Enabling Jet Substitution Mode (8500/8550) . . . . . . . . . . . . . . 6-11

Disabling Jet Substitution Mode (8400) . . . . . . . . . . . . . . . . . . 6-12

Disabling Jet Substitution Mode (8500/8550) . . . . . . . . . . . . . . 6-12

Resetting NVRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

7 Cleaning and Maintenance

Service Cleaning Maintenance Procedure . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Pick Roller Cleaning Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Maintenance Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

8 Service Parts Disassembly

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Standard Orientation of the Printer . . . . . . . . . . . . . . . . . . . . . . . 8-2

General Notes on Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Front Door (Tray 1) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

Control Panel Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

Front (Control) Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

Right Side Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

Service Manual

Left Side Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7

Exit Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7

Ink Loader Assembly and Door. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Imaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

Y-Axis Belt, Y-Axis Tension Spring, and Y-Axis Motor Assembly . 8-9

Printhead Assembly, Right and Left Printhead Restraints. . . . . . 8-12

Head Tilt Solenoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18

X-Axis Bias Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-19

Printhead Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

Media Release Blade Carriage Assembly and Transfix Roller . . . 8-22

Paper Preheater and Deskew Assembly . . . . . . . . . . . . . . . . . . . 8-23

Duplex Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25

Transfix Load Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26

Transfix Camshaft Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31

Drum Maintenance Camshaft Assembly . . . . . . . . . . . . . . . . . . . 8-32

Drum Maintenance Pivot Plate Assembly . . . . . . . . . . . . . . . . . . 8-33

Drum Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-34

Purge Pressure Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-39

Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40

Exit Module Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-40

Paper Guides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-41

Take Away Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-44

Pick Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-45

Media Tray Lift Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-47

Motors, Gears, Solenoids, Clutches, and Fans . . . . . . . . . . . . . . . . . . . . 8-48

Media Drive Gearbox with Two Clutches and Solenoid. . . . . . . . 8-48

Tray 1 Pick Solenoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-49

Preheater Lift Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-50

Process Drive Motor and Gearbox . . . . . . . . . . . . . . . . . . . . . . . 8-51

X-Axis Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-53

Head Tilt Compound Gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-54

Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-55

Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-55

Wave Amp Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-56

I/O Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-57

Drum Heater Relay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-58

NVRAM Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-59

DIMM Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-60

Hard Drive Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-61

9 Parts Lists

Serial Number Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

Using the Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4

Imaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8

Phaser 8400/8500/8550 Color Printer

Motors, Gears, Solenoids, Clutches, and Fans. . . . . . . . . . . . . . 9-10

Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12

Sensors and Flags (Actuators). . . . . . . . . . . . . . . . . . . . . . . . . . 9-14

Xerox Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

10 Wiring Diagrams

Main Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Main Wiring Diagram (Continued). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Right-Side Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Right-Side Wiring Diagram (Continued) . . . . . . . . . . . . . . . . . . . . . . . . 10-5

Left-Side Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6

Left-Side Wiring Diagram (Continued) . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

Inside Front Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8

Inside Top Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9

Inside Top - Printhead Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . 10-10

Appendix

Menu Map (8400) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Menu Map (8500/8550) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Media Margin Specification Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Paper Weight Equivalence Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

On-site Printhead Troubleshooting Checklist (8400) . . . . . . . . . . A-8

On-site Printhead Troubleshooting Checklist (8500/8550) . . . . A-13

Index

1

Section

General

Information

In this chapter...

■ Printer Introduction and Overview

■ Printer Configurations

■ Control Panel Configuration

■ Parts of the Printer

■ Routine Maintenance Items and Consumables

■ Printer Specifications

1-2 Phaser 8400/8500/8550 Color Printer

Printer Introduction and Overview

The Xerox Phaser

®

8400/8500/8550 Color Printer Service Manual is the primary

document used for repairing, maintaining, and troubleshooting the printer.

To ensure understanding of this product, complete the Xerox Phaser 8400/8500/8550

Color Printer Service Training and self-study guide.

s8500-002

Left

Right

Back

Front

General Information 1-3

Printer Configurations

The Configuration Card holds configuration information that enables or disables

built-in features as described below. The first table shows the configuration for the

8400 series. The second table shows the configuration for the 8500 series.

Phaser 8400-Series Printer Configurations

Features 8400B 8400BD 8400N 8400DP 8400DX

Maximum Print Speed 24 24 24 24 24

Memory (Std/Max) 128/512

MB

256/512

MB

128/512

MB

256/512

MB

256/512

MB

Hard Drive No No Optional** Optional** Standard

PostScript Fonts 137 137 137 137 137

PCL Fonts 81 81 81 81 81

Japanese Fonts* No No Optional Optional Optional

Job Pipelining No Yes No Yes Yes

Automatic 2-Sided Printing No Standard No Standard Standard

100-Sheet Tray 1 Standard Standard Standard Standard Standard

525-Sheet Tray 2 Standard Standard Standard Standard Standard

525-Sheet Feeder Tray 3 Optional Optional Optional Optional Standard

525-Sheet Feeder Tray 4 Optional Optional Optional Optional Optional

USB, Parallel Connection Standard Standard Standard Standard Standard

10/100 Ethernet

Connection

No No Standard Standard Standard

*Japanese fonts are provided for applicable countries per special licensing requirements.

** The following features are not included in this configuration: proof print, saved print,

secure print, and collation.

1-4 Phaser 8400/8500/8550 Color Printer

Phaser 8500/8550 Series Printer Configurations

Phaser Features 8500N 8500DN 8550DP 8550DT 8550DX

Maximum Print Speed 24ppm 24ppm 30ppm 30ppm 30ppm

Memory (Std/Max) 128MB/

1GB

128MB/

1GB

256MB/

1GB

256MB/

1GB

512MB/

1GB

Hard Drive Optional** Optional** Optional** Optional** Standard

PostScript Fonts 137 137 137 137 137

PCL Fonts 81 81 81 81 81

Job Pipelining No No Yes Yes Yes

Automatic 2-Sided Printing No Yes Yes Yes Yes

100-Sheet Tray 1 Standard Standard Standard Standard Standard

525-Sheet Tray 2 Standard Standard Standard Standard Standard

525-Sheet Feeder Tray 3 No No No Yes Yes

525-Sheet Feeder Tray 4 No No No No Yes

USB Connection Standard Standard Standard Standard Standard

10/100 Ethernet

Connection

Ye s Ye s Ye s Ye s Ye s

** The following features are not included in the Phaser 8400-series printers, but are included

with the Phaser 8500/8550 printers with a hard drive: proof print, saved print, secure print,

personal print, and font storage.

General Information 1-5

Control Panel Configuration

The Control Panel consists of one tricolor LED, a display window, and six functional

buttons. These buttons navigate the menu system, perform functions, and select

modes of operation for the printer.

LED Indicators

Control Panel Feature Descriptions

■ Green = Ready to Print ■ Flashing Green = Receiving,

Processing Data, Printing or Power

Saver Mode

■ Flashing Amber = Warning ■ Flashing Red = Error

1

Status Indicator LED:

Green: Ready to print.

Yellow: Warning condition, printer

continues to print.

Red: Startup sequence or error

condition.

Blinking: Printer is busy or warming

up.

5

Up Arrow button

Scrolls upward through the menus.

2

Graphic display indicates status

messages and menus.

6

Down Arrow button

Scrolls downward through the menus.

3

Cancel button

Cancels the current print job.

7

OK button

Accepts the selected setting.

4

Back button

Returns to the previous menu item.

8

Help (?) or Information button

Displays a help message with

information about the printer, such as

printer status, error messages, and

maintenance information.

Phaser 8500

s8500-003

3

1

4

5

6

7

8

READY TO PRINT

Walk-Up Features

Information

Paper Tray Setup

Printer Setup

Troubleshooting

2

1-6 Phaser 8400/8500/8550 Color Printer

Menu Maps

The Customer Menu Map helps you navigate the Control Panel menus. The Menu

Map’s are provided in the appendix section of this manual, see page A-2.

To print the Menu Map:

1. On the Control Panel, select Information, and then press the OK button.

2. Select Menu Map, and then press the OK button to print.

The service diagnostic menu map is detailed in Section 4, see "Service Diagnostics"

on page 4-4 for more information.

Control Panel Shortcuts

Mode or Menu Item Shortcut

Service Tools Menu On the Control Panel, press the Down Arrow button and select

Troubleshooting and press OK.

Then, press the Down Arrow button to select Service Tools and

then press OK.

Service (Internal)

Diagnostics

(Phaser 8400) Hold the Back and Info button at power up (for about

30 seconds).

(Phaser 8500/8550) Wait until Control Panel screen turns black, and

then press and hold Back and Help buttons until the message

“Beginning Service Mode” displays.

Set Control Panel

language

Press and hold the Cancel button, and then press the Help button.

Bypass protected

menus

Press and hold the Cancel button, and then press the Back button.

Jet Substitution Mode (Phaser 8400 only) To add Jet Substitution Mode to the Print

Quality Problems menu:

From the Print Quality Problems menu: press and hold the Up Arrow

button, and then press the Back button .

Phaser 8500/8550 have Jet Substitution in the main menu system

(under Eliminate Light Stripes).

FTTR (Fast Time To

Ready)

Printer goes to the ready state without waiting for thermal

temperatures to reach the proper operating values. On power-up,

when the Xerox splash screen displays, press and release the Up

Arrow button, then press the Down Arrow button. If the printer

detects ink on the drum, the display indicates a warming-up status.

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