Xerox 4400DT - Phaser B/W Laser Printer Bedienungsanleitung

Service

Manual

Phaser™

Laser Printer

4400

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.

First Printing: June 2002

071-0861-00

PHASER™ 4400

LASER PRINTER

Service Manual

Phaser 4400 Laser Printer 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 that might be present

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

and always read NOTE, CAUTION and WARNING messages.

Note: A NOTE may indicate an operating or maintenance

procedure, practice or condition that is necessary to

efficiently accomplish a task.

A NOTE may also 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, could result in damage to, or destruction of,

equipment.

Warning: A WARNING indicates an operating, or maintenance

procedure, practice or condition that, if not strictly

observed, could result in injury or loss of life.

PL: Corresponds to the FRU Parts List.

RRP: Corresponds to the FRU Disassembly Removal and Replacement Procedures.

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.

iv Phaser 4400 Laser Printer 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 4400 Laser Printer Service Manual v

Power Safety Precautions

Power source

For 110 VAC printers, do not apply more than 140 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 264 volts

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

Use only the specified power cord. This manual assumes that the reader is a qualified

service technician.

Warning: 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.

Disconnecting Power

Warning: Turning the power OFF using the On/Off switch does not

completely de-energize the printer. You must also

disconnect the printer power cord from the AC outlet.

Position the power cord so that it is easily accessible during

servicing so that you may power down the printer during

an emergency.

Disconnect the power plug 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 case

■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 4400 Laser Printer 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.

Caution: 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 unpackaged 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 ICs 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).

Phaser 4400 Laser Printer 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.

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

apply more then 264 volts rms for a 220 volt AC outlet or 140 volts rms for a 110 volt

AC outlet 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.

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 covers and panel are in place and that 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.

CLASS 1 LASER PRODUCT

The Phaser 4400 laser printer is certified to comply with Laser Product Performance

Standards set by the U.S. Department of Health and Human Services as a Class 1

Laser Product. This means that this is a class of laser product that does not emit

hazardous laser radiation; this is possible only because the laser beam is totally

enclosed during all modes of customer operation. When servicing the printer or laser

unit, follow the procedures specified in this manual and there will be no hazards from

the laser.

viii Phaser 4400 Laser Printer 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.

Warning: Turning the power OFF using the On/Off switch does not

completely de-energize the printer. You must also

disconnect the printer power cord from the AC outlet.

Position the power cord so that it is easily accessible during

servicing so that you may power down the printer during

an emergency.

Warning: Do not touch any electrical component unless you are

instructed to do so by a service procedure.

Servicing Mechanical Components

Manually rotate drive assemblies to inspect drive gears.

Warning: Do not try to manually rotate or manually stop the drive

assemblies while any printer motor is running.

Servicing Fuser Components

This printer uses heat to fuse the toner image to a sheet of paper. The Fuser Assembly

is very hot. Turn the printer power OFF and wait at least 5 minutes for the Fuser to

cool before you attempt to service the Fuser Assembly or adjacent components.

S7300-02

S7300-03

Phaser 4400 Laser Printer Service Manual ix

Regulatory Specifications

Federal Communications Commission Compliance

The equipment described in this manual generates and uses radio frequency energy. If

it is not installed properly in strict accordance with Xerox instructions, it may cause

interference with radio and television reception or may not function properly due to

interference from another device. 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 (device being interfered with).

■Increase the separation between the printer and the receiver.

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

receiver is connected.

■Route the interface cables on the printer away from the receiver

■Consult the dealer, Xerox service, or an experienced radio/television

technician for help.

Changes or modifications not expressly approved by Xerox can affect the emission

and immunity compliance and could void the user's authority to operate this product.

To ensure compliance, use shielded interface cables. A shielded parallel cable can be

purchased directly from Xerox at www.xerox.com/officeprinting/6200supplies.

Xerox has tested this product to internationally accepted electromagnetic emission

and immunity standards. These standards are designed to mitigate interference caused

or received by this product in a normal office environment. This product is also

suitable for use in a residential environment based on the levels tested.

In the United States this product complies with the requirements of an unintentional

radiator in part 15 of the FCC rules. Operation is subject to the following two

conditions: (1) this device may not cause harmful interference; (2) this device must

accept any interference received, including interference that may cause undesired

operation.

This digital apparatus does not exceed the Class B limits for radio noise emissions

from digital apparatus set out in the Radio Interference Regulations of the Canadian

Department of Communications, ICES-003.

Le présent appareil numérique n'émet pas de bruits radioélectrique dépassant les

limits applicables aux appareils numériques de la classe B prescrites dans le

Réglement sur le brouillage radioélectrique édicté par le ministere des

Communications du Canada, NMB-003.

Declaration of Conformity

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

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

normative documents:

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