Xerox Paser 7400 Bedienungsanleitung

Phaser® 7400

color printer

Service

Manual

Book 2: Options

Phaser®7400

Color Printer

Service Manual

Book 2: Options

arn

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.

First Printing: August 2005

071-0876-00

1-ii Phaser 7400 Color Printer Options Service Manual

without permission of Xerox Corporation.

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®, infoSMART®,Made For Each

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IntelliSelect®, Mythos®, Quake®, and Tekton®are trademarks of Adobe Systems Incorporated in the

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Chancery®, Chicago®, Geneva®, Monaco®, New York® , and QuickDraw®are trademarks of Apple

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or other countries.

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in the United States and/or other countries.

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SunSM, Sun Microsystems™, and Solaris®are trademarks of Sun Microsystems, Incorporated in the United

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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 ENERGY STAR®partner, Xerox Corporation has determined that this product meets the ENERGY

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.

Phaser 7400 Color Printer Options Service Manual iii

Service Terms

Manual Terms

Various terms are used throughout this manual to either provide additional

information on a specific topic or to warn of possible danger present during a

procedure or action. Be aware of all symbols and terms when they are used, and

always read NOTE, CAUTION, and WARNING statements.

Common Acronyms:

The following list defines the acronyms that may be found in this manual.

Note

A note indicates an operating or maintenance procedure, practice or condition

that is necessary to efficiently accomplish a task.

A note can provide additional information related to a specific subject or add a

comment on the results achieved through a previous action.

Caution

A caution indicates an operating or maintenance procedure, practice or condition

that, if not strictly observed, results in damage to, or destruction of, equipment.

arn

A warning indicates an operating or maintenance procedure, practice or

condition that, if not strictly observed, results in injury or loss of life.

Product Terms

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

panel may cover the hazardous area.

Danger: A personal injury hazard exists in the area where you see the sign.

ADC: Automatic Density Control MCU: Engine Control Board

BTR: Bias Transfer Roller NCS: Non-Contact Sensor

CRUM: Customer Replaceable Unit

Monitor

PHD: Imaging Unit

CTD: Toner Density Control PL: Corresponds to the FRU Parts List.

ESD: Electrostatic Discharge ROS: Laser Scanning Unit

IDT: Intermediate Transfer Unit RTC: Charge Roller

iv Phaser 7400 Color Printer Options Service Manual

Symbols Marked on the Product

DANGER high voltage.

Protective ground (earth) symbol.

Hot surface on or in the printer. Use caution to avoid personal

injury.

The surface is hot while the printer is running. After turning off

the power, wait 30 minutes.

Avoid pinching fingers in the printer. Use caution to avoid

personal injury.

Use caution (or draws attention to a particular component).

Refer to the manual(s) for information.

30 min.

Phaser 7400 Color Printer Options Service Manual v

Power Safety Precautions

Power Source

For 115 VAC printers, do not apply more than 135 volts RMS between the supply

conductors or between either supply conductor and ground. For 230 VAC printers, do

not apply more than 254 volts RMS between the supply conductors or between either

supply conductor and ground. Use only the specified power cord and connector. This

manual assumes that the reader is a qualified service technician.

Plug the three-wire power cord (with grounding prong) into a grounded AC outlet

only. If necessary, contact a licensed electrician to install a properly grounded outlet.

If the product loses its ground connection, contact with conductive parts may cause an

electrical shock. A protective ground connection by way of the grounding conductor

in the power cord is essential for safe operation.

Disconnecting Power

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Turning the power off using the power switch does not completely de-energize

the printer. You must also disconnect the power cord from the printer’s AC inlet.

Disconnect the power cord by pulling the plug, not the cord.

Disconnect the power cord in the following cases:

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

■if any liquid or foreign material is spilled into the product,

■if the printer is exposed to any excess moisture,

■if the printer is dropped or damaged,

■if you suspect that the product needs servicing or repair,

■whenever you clean the product.

vi Phaser 7400 Color Printer Options Service Manual

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 sensitive 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.

Phaser 7400 Color Printer Options Service Manual vii

Service Safety Summary

General Guidelines

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

Precautions.

Avoid servicing 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: 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 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.

Warning Labels

Read and obey all posted warning labels. Throughout the printer, warning labels are

displayed on potentially dangerous components. As you service the printer, check to

make certain that all warning labels remain in place.

Safety Interlocks

Make sure all covers are in place and all interlock switches are functioning correctly

after you have completed a printer service call. If you bypass an interlock switch

during a service call, use extreme caution when working on or around the printer.

viii Phaser 7400 Color Printer Options Service Manual

Servicing Electrical Components

Before starting any service procedure, switch off the printer power and unplug the

power cord from the wall outlet. If you must service the printer with power applied,

be aware of the potential for electrical shock.

arn

Do not touch any electrical component unless you are instructed to do so by a

service procedure.

Servicing Mechanical Components

When servicing mechanical components within the printer, manually rotate drive

assemblies, rollers, and gears.

arn

Do not try to manually rotate or manually stop the drive assemblies while any

printer motor is running.

S7300-02

S7300-03

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