Xerox DocuPrint N4525 Manuale utente

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

operating instructions unless you are qualified

to do so.

This printing: April 5, 2001

Rev. NEW

721P58090

DOCUPRINT®N4525

NETWORK LASER PRINTER

Service Quick Reference Guide

Volume 1 — Print Engine

rights reserved.

Contents of this publication may not be reproduced in any form without

permission of Xerox, Inc.

Xerox, and all product names and product numbers mentioned in this

publication are trademarks.

Other marks are trademarks or registered trademarks of the companies with

which they are associated.

RJ/MP

sn/ck

Users safety summary

Terms in manual: 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.

Terms on product:

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.

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

controls (and other conductive parts) can cause an electrical shock.

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.

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.

Power Supply and 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.

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

service procedure.

Mechanical components: Manually rotate drive assemblies to inspect

sprockets and gears.

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

printer motor is running

Laser Components

WARNING:This printer generates a laser beam as part of the printing process.

The laser beam is a concentrated narrow beam of light that

produces extreme heat at its focal point. The laser beam in this

printer is invisible. Although you cannot see the beam, it can still

cause severe damage. Direct eye exposure to the laser beam may

cause eye injury or blindness.

To avoid permanent eye damage, follow these directions:



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

unplug the power cord from the AC wall outlet.



Do not disassemble the Raster Output Scanner Assembly (laser

scanner) or any laser component that displays a Laser Warning Sticker.



Use caution when you are working around the Raster Output Scanner

Assembly or when you are performing laser related troubleshooting or

repair procedures.



Never place a mirror or a reflective tool or object in the laser beam path.



Do not disassemble the printer in such a way that the laser beam can

exit the print engine during a print cycle.

S4525-01

S4525-02

Fuser Components

WARNING:This printer uses heat to fuse the toner image to a sheet of paper.

The Fuser Assembly is very hot. Switch off printer power and wait at least 30

minutes for the Fuser to cool before you attempt to service the Fuser Assembly or

adjacent components.

Safety Components: Make sure covers and panel are in place and that all

interlock switches are all functioning correctly after you have completed a printer

service call. If you bypass, or cheat, an interlock switch during a service call, use

extreme caution when working on or around the printer.

Warning Labels: Throughout the printer, warning labels are displayed on

potentially dangerous components. When you service the printer, check to make

certain that all warning labels are in place.

Most importantly, read and obey all posted warning labels.

WARNING: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 main power source. 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.

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,



Or if any liquid or foreign material is spilled into the case,



Or if the printer is exposed to any excess moisture,



Or if the printer is dropped or damaged,



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



And whenever you clean the product.

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.

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: 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 then 250 volts rms between the supply conductors or between

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

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

This product is certified under IEC 825 as a Class 1 Laser Product.

CLASS 1 LASER PRODUCT

The DocuPrint®N4525 Network 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.

The laser and output of the laser scanner unit produces a beam that, if looked

into, could cause eye damage. Service procedures must be followed exactly as

written without change.

When servicing the machine or laser module, follow the procedures specified in

the manual and there will be no hazards from the laser.

Laser (FDA): Any laser label visible to service must be reproduced in the service

manual with location shown or indicated. Safe working procedures and clear

warnings concerning precautions to avoid possible exposure must also be

included.

The Laser contained in the DocuPrint®N4525 Network Laser Printer meets the

following standard: Laser class 3B, maximum 5mW, wavelength 780nm.

The following LASER symbol will be displayed at the start of any procedure where

possible exposure to the laser beam exists.

LUOKAN 1 LASERLAITE

KLASS 1 LASER APPARAT

Federal Communications Commission Compliance

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

Class B digital device, as stated in Part 15 of the FCC rules. These limits are

designed to provide reasonable protection against harmful interference in a

commercial installation. This equipment generates, uses, and may radiate radio

frequency energy. If not installed and used in accordance with the instructions

provided, this equipment may cause disruptive interference to nearby radio and

television communications. Even if the equipment is installed according to the

instructions, there is no guarantee that interference will not occur in a particular

installation. If this equipment does cause disruptive interference to nearby radio

and television reception, switch the equipment off to determine if it is the true

cause of the interference. If the equipment is the cause of the interference, the

user should try to minimize the interference by taking one or more of the

following courses of action:

NOTE: Installation of the Finisher and/or the Token Ring Interface results in an

FCC classification change to Class A.



Either re–orient or relocate the radio/television receiving antenna.



Increase the separation between the equipment and the radio/television

receiver.



Connect the equipment to an AC outlet that is not on the same circuit as the

radio/television receiver.



If the previous solutions fail to bring results, you should consult either your

equipment dealer or an experienced radio/television technician.

For more information on interference, refer to the Federal Communications

Commission’s booklet “How to Identify and Resolve Radio-TV Interference

Problems”. This booklet is available from the U.S. Government Printing Office,

Washington D.C. 20402, Stock No. 004-000-00345-4.

Canadian Notice

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

emissions from digital apparatus as described in the radio interference

regulations of the Canadian Department of Communications.

NOTE: Installation of the Finisher and/or the Token Ring Interface results in a

classification change to Class A.

Avis Canadien

Cet appareil numerique est conforme aux limites émission de bruits

radioélectriques pour les appareils de classe B stipulés das le réglement sur le

brouillage radioéletrique du Ministére des Communcations du Canada.

European Notice

This equipment was tested and is determined to be compliant with VDE

requirements for a Class B device.

Hinweis

Hiermit wird bescheinigt, dass der Babe Laserdrucker, in bereinstimmung mit

den Betimmunngen der Vfg 104ß 984 funkenstört ist. Der Deutschen

Bundespost wurde das Inverkehrbringen dieses Gertëes angqeigt und die

Berechtigung zur berprufung der Serie auf Einhaltung der Bestimmungen

eingeräumt.

Manual Organization

This Service Quick Reference Guide (QRG) is divided into two volumes.

Book I

Book I of the QRG contains technical information for the N4525 Print Engine

(Volume 1), as well as complete Error Code and Repair Analysis Procedures

(RAPs) for the Print Engine and all options for the printer. Information specific to

each option is repeated in that option’s volume.

NOTE: All pages, figures, tables, RAPs, RRPs (Remove and Replace Procedures)

and Parts List numbers are preceded by a “dash” number, indicating the volume

number for that module according to the following legend

Volume 1 - Print Engine

Frontis - Introductory, Safety and Regulatory Information

This is the section you are reading at this moment. It contains important safety

information regarding technical components, regulatory agency requirements

and information about this manual, which is applicable to both Books I and II.

Section 1 - General Information

This section contains a general overview of the printer and basic information

regarding RAM, print engine illustrations (major assembly locations, sensor

locations, general views, etc.), printer specifications and vital information

regarding service call procedures.

Section 2 - Error Codes and Messages

Information regarding certain Error Codes and Messages for conditions the user

may not be aware of, or conditions that exist which may not yet be made

apparent by printer performance or by image quality. Also contained in this

section is a vital error table which references Repair Analysis Procedures (RAPs)

for the Printer and all options, and referring the reader to appropriate sections in

each option manual supplement. In addition, there is additional, but valuable,

information on how to use the Repair Analysis Procedures for the Print Engine

and the options.

Volume Module

1Print Engine

2High Capacity Feeder

3Duplex Unit

4Envelope Feeder

5Face Up Bin

6Finisher

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