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7001001Lexmark X422 Laser MFP

Lexmark and Lexmark with diamond

design are trademarks of Lexmark

International, Inc., registered in the

United States and/or other countries.

Table of Contents

Index

Safety and Notices

Trademarks

Start Diagnostics

Safety and Notices

Revised August 22, 2005


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Edition: August 22, 2005

The following paragraph does not apply to any country where such provisions are

inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THISPUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS ORIMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states donot allow disclaimer of express or implied warranties in certain transactions; therefore, thisstatement may not apply to you.

This publication could include technical inaccuracies or typographical errors. Changes areperiodically made to the information herein; these changes will be incorporated in latereditions. Improvements or changes in the products or the programs described may bemade 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 [email protected] Lexmark may use or distribute any of theinformation you supply in any way it believes appropriate without incurring any obligationto you. You can purchase additional copies of publications related to this product bycalling 1-800-553-9727. In other countries, contact your point of purchase.

References in this publication to products, programs, or services do not imply that themanufacturer intends to make these available in all countries in which it operates. Anyreference 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 usedinstead. Evaluation and verification of operation in conjunction with other products,programs, or services, except those expressly designated by the manufacturer, are theusers responsibility.

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

ImageQuick, Optra Forms, and PictureGrade are trademarks of Lexmark International,Inc.

Other trademarks are the property of their respective owners. 2005 Lexmark International, Inc.All rights reserved.

UNITED STATES GOVERNMENT RIGHTSThis software and any accompanying documentation provided under this agreement arecommercial computer software and documentation developed exclusively at privateexpense.

7001001

U.S.A. P/N 12G9352


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Table of Contents

Laser notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

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

Maintenance approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1MFP identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2MFP features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Memory and user flash memory . . . . . . . . . . . . . . . . . . . . . . . 1-4Operator panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Print area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5Print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Data streams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7Paper handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8MFP speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Resolution and print quality. . . . . . . . . . . . . . . . . . . . . . . . . . 1-10RIP card specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Scanner features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12Copier specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Fax specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Diagnostic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Attendance and status messages . . . . . . . . . . . . . . . . . . . . . . . 2-2Operator panel overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Poweron self test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5Symptom tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6Service error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13


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Service checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18ADF service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19Cooling fan service check . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20Cover interlock switch service check . . . . . . . . . . . . . . . . . . .2-21Dead machine service check . . . . . . . . . . . . . . . . . . . . . . . . .2-22E-mail service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23Low voltage power supply (LVPS) service check. . . . . . . . . .2-24Fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25Cold fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26Hot fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28Continuity check on HVPS/cartridge . . . . . . . . . . . . . . . . . . .2-29Main motor service check . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30

Network printing service check . . . . . . . . . . . . . . . . . . . . . . .2-31Operator panel service check. . . . . . . . . . . . . . . . . . . . . . . . .2-32Paper feed service checks . . . . . . . . . . . . . . . . . . . . . . . . . . .2-33Print quality service checks . . . . . . . . . . . . . . . . . . . . . . . . . .2-39RIP card service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-46Scanner/copier service check . . . . . . . . . . . . . . . . . . . . . . . .2-47Transfer roll service check . . . . . . . . . . . . . . . . . . . . . . . . . .2-48USB service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-48

Solving print quality problems . . . . . . . . . . . . . . . . . . . . . . . . . .2-49Using print quality test pages . . . . . . . . . . . . . . . . . . . . . . . . .2-49

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

Menu descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1Entering the diagnostics menu . . . . . . . . . . . . . . . . . . . . . . . . .3-1Entering the configuration menu . . . . . . . . . . . . . . . . . . . . . . .3-1Configuration and Diagnostic Menu . . . . . . . . . . . . . . . . . . . . .3-2Configuration Menu Settings . . . . . . . . . . . . . . . . . . . . . . . . . .3-4Diagnostic mode menu settings . . . . . . . . . . . . . . . . . . . . . . . .3-6SE Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12Hex Trace mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13Flashing firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14System shutdown for flashing or other soft resets . . . . . . . . .3-15Flashing sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16Ways to flash the machine . . . . . . . . . . . . . . . . . . . . . . . . . . .3-17

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

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


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Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2Paper feed adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2Printhead alignment adjustment . . . . . . . . . . . . . . . . . . . . . . . 4-2Printhead registration adjustment . . . . . . . . . . . . . . . . . . . . . . 4-4Scanner calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5Scanner registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Removal procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

MFP cover removals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-93pin and 2pin connectors removal . . . . . . . . . . . . . . . . . . 4-19Bracket, opener shutter removal . . . . . . . . . . . . . . . . . . . . . . 4-20

Bracket, paper detect (input sensor) removal . . . . . . . . . . . . 4-21Cartridge coupling assembly removal . . . . . . . . . . . . . . . . . . 4-22Charge roll removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23Cooling fan removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24Droll tray 1 feed removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25Droll (tray 1) shaft assembly removal . . . . . . . . . . . . . . . . . 4-26Door latches (right side) removal . . . . . . . . . . . . . . . . . . . . . 4-28Duplex tray assembly removal . . . . . . . . . . . . . . . . . . . . . . . 4-29

Fuser assembly, fuser paper exit guide,Fuser exit sensor, and fuser lamp removal . . . . . . . . . . . . . . 4-30HVPS card removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39LVPS card removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40Lower (MPF) housing assembly removal . . . . . . . . . . . . . . . 4-41Lower (MPF) housing assembly - paper sensor removal . . . 4-42Main drive assembly removal . . . . . . . . . . . . . . . . . . . . . . . . 4-44Main drive motor assembly removal . . . . . . . . . . . . . . . . . . . 4-45

Motor assembly (stepper) removal . . . . . . . . . . . . . . . . . . . . 4-46MPF roller assembly removal . . . . . . . . . . . . . . . . . . . . . . . . 4-47Operator panel removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50Pick pad removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52Printhead removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54Rear exit door removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55Reference plate assembly removal. . . . . . . . . . . . . . . . . . . . 4-56RIP card cage (with card in place) removal . . . . . . . . . . . . . 4-58Smart button sensor removal . . . . . . . . . . . . . . . . . . . . . . . . 4-63Terminal assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-64Tray damper and spring removal . . . . . . . . . . . . . . . . . . . . . 4-65Transfer roll assembly and left transfer support bearing removal .4-66Upper (MPF) housing assembly (with paper flag) removal . . 4-66


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Scanner cover removals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67Scanner ADF removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75Scanner ADF motor removal. . . . . . . . . . . . . . . . . . . . . . . . . 4-78Scanner assembly removal. . . . . . . . . . . . . . . . . . . . . . . . . . 4-79Scanner CCD carriage removal . . . . . . . . . . . . . . . . . . . . . . 4-82Scanner CCD timing belt removal. . . . . . . . . . . . . . . . . . . . . 4-84Scanner control unit card removal . . . . . . . . . . . . . . . . . . . . 4-86Scanner document tray assembly. . . . . . . . . . . . . . . . . . . . . 4-87Scanner flatbed motor assembly removal. . . . . . . . . . . . . . . 4-88Scanner ADF pick roller assembly removal . . . . . . . . . . . . . 4-91Scanner R1 idler removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92Scanner R2 idler removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94

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

Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2Cables (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4Scanner cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6High voltage power supply (HVPS) . . . . . . . . . . . . . . . . . . . . . . 5-8Low voltage power supply (LVPS) . . . . . . . . . . . . . . . . . . . . . . . 5-9RIP card assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

RIP card assembly (continued) . . . . . . . . . . . . . . . . . . . . . . . . . 5-12SCU connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16Scanner sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

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

Lubrication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1Safety inspection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Parts catalog. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

How to use this parts catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-1Part number index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-5


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Laser notices

The following laser notice labels may be affixed to this MFP asshown:

Laser advisory label


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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, andelsewhere is certified as a Class I laser product conforming to therequirements of IEC 60825-1.

Class I laser products are not considered to be hazardous. Theprinter contains internally a Class IIIb (3b) laser that is nominally a 5milliwatt gallium arsenide laser operating in the wavelength region of770-795 nanometers. The laser system and printer are designed so

there is never any human access to laser radiation above a Class Ilevel during normal operation, user maintenance, or prescribedservice condition.

Laser

Der Drucker erfllt gem amtlicher Besttigung der USA dieAnforderungen der Bestimmung DHHS (Department of Health andHuman Services) 21 CFR Teil J fr Laserprodukte der Klasse I (1).In anderen Lndern gilt der Drucker als Laserprodukt der Klasse I,der die Anforderungen der IEC (International ElectrotechnicalCommission) 60825-1 gem amtlicher Besttigung erfllt.

Laserprodukte der Klasse I gelten als unschdlich. Im Inneren desDruckers befindet sich ein Laser der Klasse IIIb (3b), bei dem essich um einen Galliumarsenlaser mit 5 Milliwatt handelt, der Wellen

der Lnge 770-795 Nanometer ausstrahlt. Das Lasersystem und derDrucker sind so konzipiert, da im Normalbetrieb, bei der Wartungdurch den Benutzer oder bei ordnungsgemer Wartung durch denKundendienst Laserbestrahlung, die die Klasse I bersteigen wrde,Menschen keinesfalls erreicht.


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Avis relatif lutilisation de laser

Pour les Etats-Unis : cette imprimante est certifie conforme aux

provisions DHHS 21 CFR alina J concernant les produits laser deClasse I (1). Pour les autres pays : cette imprimante rpond auxnormes IEC 60825-1 relatives aux produits laser de Classe I.

Les produits laser de Classe I sont considrs comme des produitsnon dangereux. Cette imprimante est quipe dun laser de ClasseIIIb (3b) (arsniure de gallium dune puissance nominale de 5milliwatts) mettant sur des longueurs donde comprises entre 770

et 795 nanomtres. Limprimante et son systme laser sont conuspour impossible, dans des conditions normales dutilisation,dentretien par lutilisateur ou de rvision, lexposition desrayonnements laser suprieurs des rayonnements de Classe I .

Avvertenze sui prodotti laser

Questa stampante certificata negli Stati Uniti per essere conformeai requisiti del DHHS 21 CFR Sottocapitolo J per i prodotti laser diclasse 1 ed certificata negli altri Paesi come prodotto laser diclasse 1 conforme ai requisiti della norma CEI 60825-1.

I prodotti laser di classe non sono considerati pericolosi. Lastampante contiene al suo interno un laser di classe IIIb (3b)allarseniuro di gallio della potenza di 5mW che opera sullalunghezza donda compresa tra 770 e 795 nanometri. Il sistema

laser e la stampante sono stati progettati in modo tale che lepersone a contatto con la stampante, durante il normalefunzionamento, le operazioni di servizio o quelle di assistenzatecnica, non ricevano radiazioni laser superiori al livello dellaclasse 1.


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Avisos sobre el lser

Se certifica que, en los EE.UU., esta impresora cumple los

requisitos para los productos lser de Clase I (1) establecidos en elsubcaptulo J de la norma CFR 21 del DHHS (Departamento deSanidad y Servicios) y, en los dems pases, rene todas lascondiciones expuestas en la norma IEC 60825-1 para productoslser de Clase I (1).

Los productos lser de Clase I no se consideran peligrosos. Laimpresora contiene en su interior un lser de Clase IIIb (3b) de

arseniuro de galio de funcionamiento nominal a 5 milivatios en unalongitud de onda de 770 a 795 nanmetros. El sistema lser y laimpresora estn diseados de forma que ninguna persona puedaverse afectada por ningn tipo de radiacin lser superior al nivel dela Clase I durante su uso normal, el mantenimiento realizado por elusuario o cualquier otra situacin de servicio tcnico.

Declarao sobre Laser

A impressora est certificada nos E.U.A. em conformidade com osrequisitos da regulamentao DHHS 21 CFR Subcaptulo J para aClasse I (1) de produtos laser. Em outros locais, est certificadacomo um produto laser da Classe I, em conformidade com osrequisitos da norma IEC 60825-1.

Os produtos laser da Classe I no so considerados perigosos.

Internamente, a impressora contm um produto laser da Classe IIIb(3b), designado laser de arseneto de potssio, de 5 milliwatts,operando numa faixa de comprimento de onda entre 770 e 795nanmetros. O sistema e a impressora laser foram concebidos deforma a nunca existir qualquer possiblidade de acesso humano aradiao laser superior a um nvel de Classe I durante a operaonormal, a manuteno feita pelo utilizador ou condies deassistncia prescritas.


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Laserinformatie

De printer voldoet aan de eisen die gesteld worden aan een

laserprodukt van klasse I. Voor de Verenigde Staten zijn deze eisenvastgelegd in DHHS 21 CFR Subchapter J, voor andere landen inIEC 60825-1.

Laserprodukten van klasse I worden niet als ongevaarlijkaangemerkt. De printer is voorzien van een laser van klasse IIIb(3b), dat wil zeggen een gallium arsenide-laser van 5 milliwatt meteen golflengte van 770-795 nanometer. Het lasergedeelte en de

printer zijn zo ontworpen dat bij normaal gebruik, bij onderhoud ofreparatie conform de voorschriften, nooit blootstelling mogelijk isaan laserstraling boven een niveau zoals voorgeschreven is voorklasse 1.

Lasermeddelelse

Printeren er godkendt som et Klasse I-laserprodukt, ioverenstemmelse med kravene i IEC 60825-1.

Klasse I-laserprodukter betragtes ikke som farlige. Printerenindeholder internt en Klasse IIIB (3b)-laser, der nominelt er en 5milliwatt galliumarsenid laser, som arbejder p blgelngdeomrdet770-795 nanometer. Lasersystemet og printeren er udformetsledes, at mennesker aldrig udsttes for en laserstrling overKlasse I-niveau ved normal drift, brugervedligeholdelse eller

obligatoriske servicebetingelser.


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Huomautus laserlaitteesta

Tm kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS

21 CFR Subchapter J -mrityksen mukainen ja muualla luokan Ilaserlaitteiden IEC 60825-1 -mrityksen mukainen.

Luokan I laserlaitteiden ei katsota olevan vaarallisia kyttjlle.Kirjoittimessa on sisinen luokan IIIb (3b) 5 milliwatingalliumarsenidilaser, joka toimii aaltoalueella 770 - 795 nanometri.Laserjrjestelm ja kirjoitin on suunniteltu siten, ett kyttj eialtistu luokan I mrityksi voimakkaammalle steilylle kirjoittimen

normaalin toiminnan, kyttjn tekemien huoltotoimien tai muidenhuoltotoimien yhteydess.

VARO! Avattaessa ja suojalukitus ohitettaessa olet alttiinankymttmlle lasersteilylle. l katso steeseen.

VARNING! Osynlig laserstrlning nr denna del r ppnad och

sprren r urkopplad. Betrakta ej strlen.

Laser-notis

Denna skrivare r i USA certifierad att motsvara kraven i DHHS 21CFR, underparagraf J fr laserprodukter av Klass I (1). I andralnder uppfyller skrivaren kraven fr laserprodukter av Klass I enligt

kraven i IEC 60825-1.Laserprodukter i Klass I anses ej hlsovdliga. Skrivaren har eninbyggd laser av Klass IIIb (3b) som bestr av en laserenhet avgallium-arsenid p 5 milliwatt som arbetar i vglngdsomrdet 770-795 nanometer. Lasersystemet och skrivaren r utformade s att detaldrig finns risk fr att ngon person utstts fr laserstrlning verKlass I-niv vid normal anvndning, underhll som utfrs avanvndaren eller annan freskriven servicetgrd.


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Laser-melding

Skriveren er godkjent i USA etter kravene i DHHS 21 CFR,

underkapittel J, for klasse I (1) laserprodukter, og er i andre landgodkjent som et Klasse I-laserprodukt i samsvar med kravene i IEC60825-1.

Klasse I-laserprodukter er ikke betrakte som farlige. Skrivereninneholder internt en klasse IIIb (3b)-laser, som bestr av engallium-arsenlaserenhet som avgir strling i blgelengdeomrdet770-795 nanometer. Lasersystemet og skriveren er utformet slik at

personer aldri utsettes for laserstrling ut over klasse I-niv undervanlig bruk, vedlikehold som utfres av brukeren, eller foreskrevneserviceoperasjoner.

Avs sobre el Lser

Segons ha estat certificat als Estats Units, aquesta impressoracompleix els requisits de DHHS 21 CFR, apartat J, pels producteslser de classe I (1), i segons ha estat certificat en altres llocs, s unproducte lser de classe I que compleix els requisits dIEC 60825-1.

Els productes lser de classe I no es consideren perillosos. Aquestaimpressora cont un lser de classe IIIb (3b) darsenir de gal.li,nominalment de 5 mil.liwats, i funciona a la regi de longitud donade 770-795 nanmetres. El sistema lser i la impressora han sigutconcebuts de manera que mai hi hagi exposici a la radiaci lser

per sobre dun nivell de classe I durant una operaci normal, durantles tasques de manteniment dusuari ni durant els serveis quesatisfacin les condicions prescrites.


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Japanese Laser Notice

Chinese Laser Notice


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Korean Laser Notice


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Safety information

The safety of this product is based on testing and approvals ofthe original design and specific components. The manufactureris not responsible for safety in the event of use of unauthorizedreplacement parts.

The maintenance information for this product has beenprepared for use by a professional service person and is notintended 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 takenecessary precautions.

CAUTION: When you see this symbol, there is adanger from hazardous voltage in the area of theproduct where you are working. Unplug the productbefore you begin, or use caution if the product mustreceive power in order to perform the task.

Consignes de scurit

La scurit de ce produit repose sur des tests et desagrations portant sur sa conception d'origine et sur descomposants particuliers. Le fabricant n'assume aucuneresponsabilit concernant la scurit en cas d'utilisation depices de rechange non agres.

Les consignes d'entretien et de rparation de ce produits'adressent uniquement un personnel de maintenancequalifi.

Le dmontage et l'entretien de ce produit pouvant prsentercertains risques lectriques, le personnel d'entretien qualifidevra prendre toutes les prcautions ncessaires.

ATTENTION : Ce symbole indique la prsence

d'une tension dangereuse dans la partie du produitsur laquelle vous travaillez. Dbranchez le produitavant de commencer ou faites preuve de vigilance sil'excution de la tche exige que le produit reste soustension.


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Norme di sicurezza

La sicurezza del prodotto si basa sui test e sull'approvazionedel progetto originale e dei componenti specifici. Il produttorenon responsabile per la sicurezza in caso di sostituzione nonautorizzata delle parti.

Le informazioni riguardanti la manutenzione di questo prodottosono 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 pielevato. 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 usarecautela se il prodotto deve essere alimentato pereseguire l'intervento.

Sicherheitshinweise Die Sicherheit dieses Produkts basiert auf Tests und

Zulassungen des ursprnglichen Modells und bestimmterBauteile. Bei Verwendung nicht genehmigter Ersatzteile wirdvom Hersteller keine Verantwortung oder Haftung fr dieSicherheit bernommen.

Die Wartungsinformationen fr dieses Produkt sindausschlielich fr die Verwendung durch einenWartungsfachmann bestimmt.

Whrend des Auseinandernehmens und der Wartung desGerts besteht ein zustzliches Risiko eines elektrischenSchlags und krperlicher Verletzung. Das zustndigeFachpersonal sollte entsprechende Vorsichtsmanahmentreffen.

ACHTUNG: Dieses Symbol weist auf einegefhrliche elektrische Spannung hin, die in diesemBereich des Produkts auftreten kann. Ziehen Sie vorden Arbeiten am Gert den Netzstecker des Gerts,bzw. arbeiten Sie mit groer Vorsicht, wenn dasProdukt fr die Ausfhrung der Arbeiten an denStrom angeschlossen sein mu.


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Pautas de Seguridad

La seguridad de este producto se basa en pruebas yaprobaciones del diseo original y componentes especficos.El fabricante no es responsable de la seguridad en caso de usode piezas de repuesto no autorizadas.

La informacin sobre el mantenimiento de este producto estdirigida exclusivamente al personal cualificado demantenimiento.

Existe mayor riesgo de descarga elctrica y de daospersonales durante el desmontaje y la reparacin de la

mquina. El personal cualificado debe ser consciente de estepeligro y tomar las precauciones necesarias.

PRECAUCIN: este smbolo indica que el voltajede la parte del equipo con la que est trabajando espeligroso. Antes de empezar, desenchufe el equipoo tenga cuidado si, para trabajar con l, debeconectarlo.

Informaes de Segurana

A segurana deste produto baseia-se em testes e aprovaesdo modelo original e de componentes especficos. O fabricanteno responsvel pela segunrana, no caso de uso de peasde substituio no autorizadas.

As informaes de segurana relativas a este produtodestinam-se a profissionais destes servios e no devem serutilizadas por outras pessoas.

Risco de choques elctricos e ferimentos graves durante adesmontagem e manuteno deste produto. Os profissionaisdestes servios devem estar avisados deste facto e tomar oscuidados necessrios.

CUIDADO: Quando vir este smbolo, existe apossvel presena de uma potencial tenso perigosa

na zona do produto em que est a trabalhar. Antesde comear, desligue o produto da tomada elctricaou seja cuidadoso caso o produto tenha de estarligado corrente elctrica para realizar a tarefanecessria.


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Informaci de Seguretat

La seguretat d'aquest producte es basa en l'avaluaci iaprovaci del disseny original i els components especfics.El fabricant no es fa responsable de les qestions deseguretat si s'utilitzen peces de recanvi no autoritzades.

La informaci pel manteniment daquest producte estorientada exclusivament a professionals i no est destinadaa ning que no ho sigui.

El risc de xoc elctric i de danys personals pot augmentardurant el procs de desmuntatge i de servei daquest producte.

El personal professional ha destar-ne assabentat i prendreles mesures convenients.

PRECAUCI: aquest smbol indica que el voltatgede la part de l'equip amb la qual esteu treballant sperills. Abans de comenar, desendolleu l'equipo extremeu les precaucions si, per treballar ambl'equip, l'heu de connectar.


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Preface

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

1. General information contains a general description of the MFPand the maintenance approach used to repair it. Special toolsand test equipment are listed, as well as general environmentaland safety instructions.

2. Diagnostic information contains an error indicator table,symptom tables, and service checks used to isolate failing fieldreplaceable units (FRUs).

3. Diagnostic aids contains tests and checks used to locate orrepeat symptoms of MFP problems.

4. Repair information provides instructions for making MFPadjustments and removing and installing FRUs.

5. Connector locations uses illustrations to identify the connectorlocations and test points on the printer.

6. Preventive maintenance contains the lubrication specificationsand recommendations to prevent problems.7. Parts catalog contains illustrations and part numbers for

individual FRUs.

Definitions

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

CAUTION: A caution identifies something that might cause aservicer harm.

CAUTION: When you see this symbol, there is a

danger from hazardous voltage in the area of theproduct where you are working. Unplug the productbefore you begin, or use caution if the product mustreceive power in order to perform the task.


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1. General information

The Lexmark X422 multifunction product (MFP), with 128MB ofmemory standard, a USB port, an integrated Ethernet adapter, and33.6K baud fax/modem.

This chapter provides an overview of the capabilities of the MFP andavailable options for each model.

Maintenance approach

The diagnostic information in this manual leads you to the correctfield replaceable unit (FRU) or part. Use the error code charts,symptom index, and service checks to determine the symptom andrepair the failure. See Diagnostic information on page 2-1 formore information. See Repair information on page 4-1 to helpidentify parts. After completing the repair, perform tests as needed toverify the repair.


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MFP identification

Options

See Options on page 7-22 for a list of options available for theMFP.


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MFP features

Connectivity

Note:

Indicates attachment is part of the model factory shippedconfiguration.

Fonts

Note: There is no font card support.

Attachments

Standard USB interface

Standard Ethernet 10/100 BaseTX

Fax modem

Fonts / options

PCL bitmapped 2

PCL outline 89

PS outline 91

PPDS bitmapped 5

PPDS outline 39


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Memory and user flash memory

Each model has a standard amount of memory (RAM) soldered on the systemcard, and a certain number of 100-pin DIMM slots available for installing

additional memory or user flash memory options.

Note: Indicates option is supported.

Memory

Standard memory 128MB

Standard flash memory None

Memory options

8MB DIMM 16MB DIMM 32MB DIMM 64MB DIMM 128MB DIMM

Maximum # of memory DIMM 2

Maximum possible memory 384MB

Flash memory options

16MB User flash daughter card 32MB User flash daughter card

Maximum # of flash daughter cards 1

Maximum possible flash memory 32MB


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Print media

The following table shows the supported media, media weights andmedia textures which together provide optimal print quality across a

variety of media.

Note: Indicates media is supported.

Media

Paper

Card stock

Transparency

Labels

Envelope

Cotton paper

Bond

Media weights

Heavy

Normal

Light

Media textures

Rough

Normal

Smooth


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Data streams

Note:

Indicates data stream is supported.

PCL 6 emulation includes the PCL 5e and PCL XL interpreters,and is fully compatible with Hewlett Packards LaserJet 5 Family.Furthermore, the MFP PCL emulation is backward compatiblewith the Lexmark T 520/522/620/622 and other members ofLexmarks Optra family of laser printers.

700100x supports version 3010 of the Adobe definition ofPostScript 3, and the interpreter is backward compatible withthe Optra T 520/522/620/622 and other members of LexmarksOptra family of laser printers.

PPDS is backward compatible with Optra T 520/522/620/622and Lexmarks Optra family of laser printers. The PPDSinterpreter is inactive as a factory default. It must be activatedusing a PJL command or operator panel operation before it canbe used.

Data streams

PCL 6 emulation

PostScript 3 emulation

PPDS

PDF (version 1.3)


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Paper handling

Notes:

Indicates associated capability is supported.

Assumes 20 lb xerographic paper. The user must choose between the 250sheet and500sheet optional drawers when adding additional papersources.

Paper handling

Standard

Standard input sources:

Integrated 250sheet trayThe 250sheet drawer supports thefollowing sizes: A4, A5, JIS B5, folio, letter,legal, executive, and statement.

Multipurpose feeder

2

1

1

Standard output destination

150sheet sensing bin

1

1

Standard duplex

Envelope conditioning

Options

Maximum # of optional drawers 1

Optional drawers:

250sheet drawer 500sheet drawer

The 500sheet drawer supports thefollowing sizes: A4, JIS B5, folio, letter, legal,and executive.

Maximum # of media input sources 3

Maximum input sheet capacity (excludingenvelopes)

850


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MFP speed

Speed

Pages/minute in 300 dpi 22

Pages/minute in 600 dpi 22

Pages/minute in 1200 Image Quality (IQ) dpi 22

Time to first print 10 seconds


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Resolution and print quality

Note:

IET, PictureGrade, print resolution, print darkness, and tonersaver can all be set independently of each other through thedata stream.

Operator panel menus let a user independently setPictureGrade, and print resolution.

The IET setting is implicitly selected when a particular printresolution is selected using the Quality Menu.

Toner saver and print darkness settings are implicitly set when aparticular toner darkness is selected using the Quality Menu.

Note: Indicates print quality setting is supported.

Print quality setting

Print resolution:

300 dpi 600 dpi

1200 IQ dpi

Image Enhancement Technology (IET):

2 Bits/Pel

Toner saver

Print darkness

PictureGrade


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RIP card specifications

Supplies

Feature

Processor PMC SierraRM5231A

Processor/Bus frequency 300/100 MHz

Synchronous DRAM 2128 Mbit

NAND flash 164 Mbit

Processor internal bus width capability 64 BitRIP SRAM 0KB

Print cartridge Average yield Approximatecoverage

Print cartridges 6,000

12,000

5%

5%


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Scanner features

Scanner function Capability

Optical resolution (scan direction) 600 dpi

Optical resolution (feed direction) 300/600 dpi

Scan modes

600 scan, 300 feed (mono) 600 scan, 600 feed (mono) 600 scan, 300 feed (color) 600 scan, 600 feed (color)

16 ppm8 ppm10 ppm5 ppm

Maximum ADF paper capacity 50 sheets

Maximum ADF dimensions 8.5 x 14 inches

Maximum flatbed dimensions 8.5 x 11.69 inches

ADF and flatbed paper sizes

A5 JISB5 Executive Letter Legal Folio Statement A4

Note: These sizes are supportedwithout size sensing.

Supported pixel depth

1 bit (mono) 8 bit (mono) 24 bit (color)

Max output resolution (dpi) forsetting

600 x 600600 x 600300 x 300

ADF

YesYesYesYesYesYesYesYes

Flatbed

YesYesYesYesNoNoYesYes


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Scanner resolutions per mode:

Copier specifications

Scanning mode Output resolution Optical resolution

Copy (all modes) 600 x 600 600 scan, 300 feed

Fax standard 200 x 100 600 scan, 300 feed

Fax fine 200 x 200 600 scan, 300 feed

Fax super fine 300 x 300 600 scan, 300 feed

Fax ultra fine 400 x 400 600 scan, 600 feed

Scantohost 75 dpi 75 x 75 600 scan, 300 feed




Scantohost 400 dpi(mono only)

400 x 400 600 scan, 600 feed

Scantohost 600 dpi(mono only)

600 x 600 600 scan, 600 feed

Function Description

Speed Simplex - 22 ppm (scan once / printmany)

Duplex - 12 ppm (scan once / printmany)

Time to first copy(text / mixed)

From Power Save - 45 to 80 seconds From Stand By / Ready - 20 seconds

Copy resolution Output resolution - 600 x 600 dpi (based

on a 600 x 300 optical resolution)

Duplex input Manual

Duplex output Standard

Collation Yes


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Fax specifications

Serial number

The serial number label is on the inside front cover of the MFP.

Special toolsLong Phillips screwdriver (approximately 6inch shank)

Slotted screwdriverSmall Phillips screwdriver

When taking voltage readings, always use the MFP frame as groundunless another ground is specified.

Function Description

Transmission rate Approximately 3 seconds per page

Modem 33.6 kpbs

Compression MH, MR, MMR, Super G3

Resolution 200 x 100 dpi 400 x 400 dpi

Speed dial 300 (based on 10digit phone numbers)

Group fax Supported by speed dial (shortcuts)

Broadcast 46 locations (based on 10 digit numberswith a maximum of 512 characters

Manual fax Yes

Fax from PC Supported using PS driver for both local

and network attach modes


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Acronyms

ADF Automatic Document Feed

AFE Analog Front EndASIC Application Specific Integrated CircuitC Charge RollCCD Charge Couple DeviceCCW CounterclockwiseCW ClockwiseDC Direct CurrentDEV Developer Roll

DIMM Dual Inline Memory ModuleDNSFBP Danish, Norwegian, Swedish, Finnish, Brazilian

PortugueseDPI Dots Per InchDRAM Dynamic Random Access MemoryEOLS End Of Line SensingFFC Flexible Flat CableFIGSD French, Italian, German, Spanish, Dutch

FRU Field Replaceable UnitGND GroundHVPS High Voltage Power SupplyIDE Integrated Development EnvironmentIET Image Enhancement TechnologyINA Internal Network AdapterIQ Image QualityKB KilobyteKBPS Kilobits Per Second (usually as Kbps) /

Kilobytes Per Second (usually as KBps)LCD Liquid Crystal DisplayLED LightEmitting DiodeLSU Laser Scanning UnitLVPS Low Voltage Power SupplyMFP Multifunction ProductMH Message HandlingMHz Megahertz

MMR Modified Modified ReadMPF Multipurpose FeederMR (Modem) Modem ReadyNAND Not And (Gate)NVRAM Nonvolatile Random Access MemoryOPU Operator panel Unit


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PCB Printed Circuit BoardPCL 6 Printer Command LanguagePJL Printer Job LanguagePOR PowerOn ResetPOST PowerOn Self TestPPDS Personal Printer Data StreamPS PostScriptPWB Printed Wiring BoardRIP Raster Image ProcessorROM Read Only MemoryRS Recommended StandardSCU Scanner Control Unit

SE Systems EngineerT Transfer (Roll)TAR Toner Adder RollUSB Universal Serial BusV ac Volts Alternating Current


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2. Diagnostic information

StartUnplug power from the MFP before connecting ordisconnecting any cable, assembly, or electronic card.This is a precaution for personal safety and to preventdamage to the printer.

This chapter contains the codes and diagnostic tools to aid in

providing corrective action for a malfunctioning MFP.

The status of the machine is displayed on the LCD.


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Attendance and status messages

Error

code Attendance message description

Change cartridge invalid refill

Change

Close door or insert cartridge

Insert Tray 1

Invalid UAA

Load

Load manual

Remove standard paper bin

31 Missing or defective print cartridge, replace cartridge

32 Unsupported print cartridge, replace cartridge

34 Short paper

35 Insufficient memory to support Resource Save feature

37 Insufficient memory to collate job

Insufficient memory for Flash Memory Defragment operation

Insufficient memory, some Held Jobs may be lost38 Memory full

39 Complex page, some data may not have printed

50 PPDS font error

51 Defective flash detected

52 Not enough free space in flash memory for resources

53 Unformatted flash detected

54 Standard Network Software error


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55 Unsupported Flash in slot Unsupported Memory in slot

56 Standard USB Port Disabled

88 Toner low

Scanner ADF cover open

Scanner registration successfully completed

Scanner registration failed

Error

codePaper jam status messages

200 Paper jam, remove print cartridge to access (MFP inputsensor)

201 Paper jam, remove print cartridge to access (between MFPinput and exit sensor)

202 Paper jam, open rear door to access

230 Paper jam, check duplex

250 Paper jam, check MP feeder290 Scanner jam, remove all originals from scanner

Replace originals if restarting job

Error

codeAttendance message description


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Operator panel overview

The X422 operator panel consists of a 240X64 dot matrix APA LCD

and 27 buttons can be illuminated (copy, fax, e-mail and print/profiles). The display is capable of displaying approximately eightlines of text with 40 characters each.

The operator panel may be used for:

Determining MFP status. Reviewing MFP settings (See Configuration Menu Settings

on page 3-4 for more information.) Changing MFP settings (See Configuration Menu Settings

on page 3-4 for more information.) Utilizing diagnostic tools (See Diagnostic mode menu

settings on page 3-6 for more information.) Obtaining information about MFP service errors (See Service

error codes on page 2-13 for more information.)


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Poweron self test (POST)

When you turn the MFP on, it performs a PowerOn Self Test. Withall the cables connected, the MFP completes POST between 1520seconds in the following sequence:

1. The four blue LEDs light and immediately revert to threeilluminated LEDs.

The display shows a series of dots across the screen. The MFPis performing the memory test.

2. Then, two LEDs are illuminated and the display shows theamount of installed memory and processor speed (for example,128MB 300).

3. Next, one LED is illuminated for a moment.

The display message is Performing Self Test, the ADF istested, the scanner calibrates, and the drive motor and theprinthead motors run.

Note:

If non-critical sections of NVRAM, or factory defaults AREbeing restored from the configuration menu, the displaymessage is RESTORING FACTORY DEFAULTS for aminimum of three seconds.

If the firmware has detected a version change,PERFORMING SELT TEST is displayed for a minimum ofthree seconds.

If all NVRAM settings are being reset, RESETTING ALL OF

NVRAM is displayed for a minimum of three seconds.


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4. The MFP cycles down, and the home screen is displayed.

Note:

If errors are detected, an attendance message is displayed. If the CCD is locked, a message is posted instructing the

user to unlock the CCD.

If toner is low, a message is displayed. Cartridge errors are posted if the cartridge is defective or

invalid.

If a cover is open, a message is displayed.

If POST gets to step 2 and hangs for more than 60 seconds, removeany optional RAM from the RIP card. Restart the machine. If theproblem persists, replace the RIP card.

If POST begins, but the ADF, scanner calibration, and motor testdont start, check connections on the RIP card. Replace the RIPcard as necessary.

Symptom tablesCheck for correct POST functions of the MFP by observing thefollowing symptoms:

See Poweron self test (POST) on page 2-5 for moreinformation.


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POST symptom table

Symptom Action

The main motor, cooling fan andfuser do not come on.

See the Cover interlock switchservice check on page 2-21.

POST completes except one ormore lights do not come on.

See the Operator panel servicecheck on page 2-32.

None of the lights come on. See the Operator panel servicecheck on page 2-32.

Main motor does not come on. See the Main motor servicecheck on page 2-30.

Fan does not come on. See the Cooling fan servicecheck on page 2-20.

Fuser lamp does not come on. See the Cold fuser servicecheck on page 2-26.

Fuser lamp never turns off. See the Hot fuser service checkon page 2-28.

The paper feed picks and tries tofeed paper.

See the Paper feed servicechecks on page 2-33.

LEDs on operator panel, anddisplay fail to illuminate. Fan runscontinuously.


Scanner locked power off andRestart message appears when

scanner is unlocked.

See the Scanner/copier servicecheck on page 2-47.

ADF pick roller, or motor does notrun during start up.

See the ADF service check onpage 2-19.

operator panel lights functionproperly at POST, but the displayis blank.


Machine POSTS and enters

operations mode but one or morebuttons are not functioning.

See the Operator panel service

check on page 2-32.


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MFP symptom table

Symptom Action

Dead machine (no power) See the Dead machine servicecheck on page 2-22.

Fan noisy or not working See the Cooling fan servicecheck on page 2-20.

Fuser parts melted See the Hot fuser service checkon page 2-28.

Fuser lamp doesnt light See the Cold fuser servicecheck on page 2-26.

Toner not fused to the paper See the Poor fusing of image onpage 2-44.

Blank page See the Blank Page onpage 2-39.

Black page See the Black page onpage 2-41.

Heavy background See the Heavy background onpage 2-42.

Light print See the Light print on page 2-44.

White or black lines or bands See the White or black lines orbands on page 2-45.

Toner on back of page See the Toner on back of page

on page 2-45.

Paper jams See the Paper feed servicechecks on page 2-33.

Main motor noisy or does notmove

See the Main motor servicecheck on page 2-30.

Paper never picks See the Paper never picks onpage 2-37.

Paper feeds continuously See the Paper picks during POSTand/or continuously onpage 2-35.


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Paper skew See the Note regarding alignment

on page 4-57 or Paper feedservice checks on page 2-33.

MFP not communicating with host See Network printing servicecheck on page 2-31.

Paper wrinkled or bent See Paper trees, wrinkles,stacks poorly or curls onpage 2-38.

Top cover will not close See Cover interlock switchservice check on page 2-21.

Operator panel button does notrespond

See Operator panel servicecheck on page 2-32 or RIP cardservice check on page 2-46.

MFP not communicating with hostover network

See Network printing servicecheck on page 2-31.

Symptom Action


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Scanner / copier symptom table

Symptom Action

Machine boots, but LCD posts aScanner Locked Power off andRestart attendance message.

1. Check whether scanner CCD islocked.

2. Perform scanner service check.See Scanner/copier servicecheck on page 2-47 for moreinformation.

Documents dont feed into ADF.Scanner jam (290) error.

1. Check for dirty sensors.2. Check the paper present sensor

(using the scanner sensor test indiagnostics). Replace asnecessary.

3. Check continuity of scanner ADF motor cable.

If good, replace ADF motor. If bad, replace ADF motor

cable.

Paper feeds into ADF, but jams inthe ADF. Error 290 generated. Perform ADF service check. SeeADF service check on page 2-19for more information.

ADF runs paper through, but nocopy is made. Error 290generated.

Perform ADF service check. SeeADF service check on page 2-19for more information.

Scanner does not respond toscan command from attached

computer.

Perform USB service check. SeeUSB service check on page 2-48

for more information.


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E-mail symptoms

RIP software error on startup. 1. Check the connections on all

cables to the RIP card to the SCUcard.2. Check for loose connectors, bent

or broken pins on the connectors.Ensure the individual wires aresecure in the connector.

3. Check connector J32 on RIP card. Pin 1 should be +5 V Pin 4 should be +24 V Pins 2 and 3 are ground

If they pass, check continuity on thepower cable connecting the RIP cardto the SCU.

If they fail, replace the RIP card.

If the cable checks out, replace theSCU.

If it fails, replace the cable.Scanner repeatedly gives the usera Scan Locked Power off andRestart message when thescanner is actually unlocked.

See Scanner/copier servicecheck on page 2-47 for moreinformation.

Scanner repeatedly reports 290error.

See Scanner/copier servicecheck on page 2-47 for moreinformation.

Symptom Action

Scanner runs, mail confirmationfailure.

Perform E-mail service check. SeeE-mail service check onpage 2-23 for more information.

Weblink fails. 1. Check that the FTP server is onthe network.

2. Check the FTP server IP address.

Symptom Action


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Fax symptoms

Symptom Action

No dial tone. 1. Check that phone line isconnected properly.

2. Check that the phone socket isworking properly. (Test the socketwith a phone.)

Machine dials a number but failsto make a connection withanother fax machine.

The other fax machine may beturned off. Ask the fax recipient tocheck their machine.

Incoming fax has blank spaces orpoor quality.

1. The sending fax machine may befaulty.

2. The sending fax machine mayhave a dirty document glass.

3. A noisy phone line can causeerrors.

4. Check the MFP print quality bymaking a copy.

5. The print cartridge may be empty.

Replace as necessary.Some words on an incoming faxare stretched.

The sending fax machine had atemporary jam.

Documents are not stored inmemory.

There may not be enoughmemory to store the document.

The machine may display anInsufficient Memory message.

Wait for current jobs to process.

Delete any print and hold jobs thatare not needed. Install more memory.

Document does not feed. 1. Make sure the document is notwrinkled and that it has beeninserted correctly.

2. Check that the document is thecorrect size.


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Service error codes

Service error codes are generally nonrecoverable except in an

intermittent condition when a POR of the MFP temporarily recoversfrom the error condition.

Error code Description Action

900 RIP softwareerror

Internal RIP softwareerror on the systemcard.

Replace the systemcard.

902 Engine softwareerror

General internal enginesoftware error on thesystem card.

Replace the systemcard.

920 Fuser error Fuser belowtemperature whenprinting.

Perform cold fuserservice check to isolatethe problem to:- Fuser lamp- Lamp cable- Complete fuser(thermistor)

LVPS

921 Fuser error Fuser below standbytemperature in idle.

922 Fuser error Fuser failed to reachstandby temperature.

923 Fuser error Fuser too hot duringprinting or in idle.

Perform hot fuserservice check to isolatethe problem to:- Fuser lamp- Complete fuser(thermistor)

924 Fuser error Open circuit inthermistor path.

925 Fuser error Incorrect fuser lampinstalled.

929 Toner sensor Indicates a problemwith either the tonersensor or printcartridge.

Test the toner sensorusing the "Base SensorTest" in the diagnosticmenu.

If the test fails,replace the sensor.

If the test passes,replace thecartridge.


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931 Printhead error No first Hsync. Inspect the printhead

cable for continuity /connection.

If the inspectionpasses, replace theprinthead.

932 Printhead error Lost Hsync. Inspect the printheadcable for continuity /connection.


935 Printhead error Mirror motor unable toreach operating speed.

Perform voltage checkon printhead connectorof the RIP card.

If the voltages are

incorrect, replace thecard.

Inspect the printheadcable for continuity /connection.


936 Transport motor Transport motor initiallock failure.

Inspect motor, cablingand main driveassembly.

Replace defectiveparts.

937 Transport motor Transport motor lostlock.

939 RIP - enginecommunications

RIP processor cannotcommunicate with

engine processor onRIP card.

Replace RIP cardassembly.

940 LVPS (LowVoltage Power Supply)

There is a failure withthe zero crossing signalon the line controllingthe fuser lamp.

Ensure the properLVPS is installed.



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941 Image pipeline An error was detected

with the image pipelineASIC on the RIP card.

Observe debug data of

engine microcode.Replace RIP cardassembly, if necessary.

942 Scanner failure Communication failure.

RIP card cannotestablishcommunications with

the scanner card.

Inspect the RIPSCUcable for properconnection andconductivity.

If the inspectionpasses, replace theSCU card.

943 Scanner failure Carriage mechanicalfailure.

Check the mechanicalmovement of the CCDcarriage.

Replace the defectivecomponent.

944 Scanner failure Lamp failure.

One or both of thelamps failed, or theCCD cable has failed.

Check the CCD cablefor proper connectionand connectivity.

If inspection passes,replace the CCDcarriage.945 Scanner failure CCD failure.

The CCD circuit on the

CCD carriage hasfailed or the CCD cablehas a problem.

946 Scanner failure CCD calibration error. Perform the scannercalibration process.

Check the CCD cablefor proper connectionand connectivity.

If inspection passes,replace the CCDcarriage.



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947 Modem failure Modem card, on the

RIP card, experienceda failure.

Replace RIP card

assembly.

948 Fax storage Flash partition toosmall on modem card.

949 Fax storage Flash partition invalidor not available.

Reformat from theconfiguration menu.

If the problem persists,replace the RIP cardassembly.

952 NV failure: n NVRAM CRC errordetected. "n" indicateswhere the erroroccurred.

POR the machine toclear the error.

If the problem persists,replace the operatorpanel.

953 NVRAM failure NVRAM chip failure. Replace the operatorpanel.

954 NVRAM failure NVRAM CRC failure.

955 Code CRC Code ROM and NANDfailed the CRC check,or NAND experiencedan uncorrectable multi-bit failure.

Replace the RIP card.

956 System board Processor failure. Replace the RIP card.

957 System board ASIC failure. Replace the RIP card.

958 NAND failure Indicates the systemhas performed morethan 100 shift andre-flash operations as aresult of ECC bitcorrections.


959 System board SRAM failure. Replace the RIP card.

960 Memory error RAM soldered on RIPcard has failed.


961 Memory error RAM in slot 1 isdefective.

Replace the DIMM inslot 1.



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962 Memory error RAM in slot 2 is

defective.

Replace the DIMM in

slot 2.965 Panel failure The engine is

experiencing failuressending commands tothe operator panel.

Inspect the operatorpanel RIP cable forconnectivity andcontinuity.

If the cable passes,replace the operatorpanel.

If the cable fails,replace the RIP card.

976 Standardnetwork

Unrecoverable softwareerror in the networkport.




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7001001

Service checks

Service checks involve measuring voltages of the LVPS,

HVPS, SCU, and RIP card assemblies. Continuity andresistance verifications are done on cables andcomponents as required.

Note: When looking at the printed side of a PCB, connectors aredesignated with J followed by a number. On the SCU card, theconnectors are designated with a CN followed by a number. Pin 1 isdesignated on the PCB by an adjacent 1 or triangle. Pin numbers

index sequentially to the opposite end of the connector. See RIPcard assembly on page 5-10 for more information.


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ADF service check

FRU Action

ADF assemblySCU card

1. Open the ADF cover and check forobstructions in the paper path.

2. Check the sensors to ensure theflags move freely or dust is notblocking the sensors.

If the ADF makes a copy andgenerates a 290 error after the lastsheet is fed through the ADF, andthe error only goes away after a

POR, replace the ADF. If the problem persists, replace

the SCU.If the ADF starts feeding, but prints ablank page generating a 290 error,the paper may or may not feed allthe way through the ADF. POR the machine into diagnostics

mode and perform a scannersensor test on the paper present

sensor and the ADF cover sensor. If the ADF cover sensor remains

in the CL setting when actuatedand the paper position sensorremains in the OP setting whenactuated, replace the SCU card.

If the ADF cover sensor changesto the OP setting when actuated,replace the ADF.

Paper in the ADF does not feed,a blank page is run from the printer.Paper in the ADF does not feed,a 290 error is generated.

Check CN5, pins 1 and 2 for +24V. If +24V, replace the ADF motor

assembly. If not +24V, replace the SCU.

ADF pick roller, and ADF motor notrunning during POST.

Check CN5, pins 1 and 2 for +24V. If +24V, replace the ADF motor

assembly. If not +24V, replace the SCU.


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2-20 Service Manual

7001001

Cooling fan service check

FRU Action

Cooling fan Make sure the cooling fan motorcable plug is properly seated.

Turn the MFP off and disconnect thecooling fan cable at the cooling fan.

Turn the MFP on. Withinapproximately 15 seconds the RIPcard assembly should apply +24V dc

to the fan. See RIP cardassembly on page 5-10 for moreinformation.

If voltage is present, replace thecooling fan.

If voltage is not present,disconnect the cable from the RIPcard (J30) and check for continuityand shorts (connector sockets 1

and 2). If the cable is good, see the

RIP card service check onpage 2-46 for moreinformation.

If the cable is damaged,replace the cable.


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7001001

Cover interlock switch service check

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

FRU Action

Cover interlock switch Disconnect the cover interlock cablefrom the interlock switch.

Push the cover interlock switch tothe closed position and verifycontinuity between the bottom andmiddle terminals.

Open the switch and verify continuitybetween the bottom and topterminals. The top and middleterminals indicate discontinuity at alltimes.

If the switch is good, verify

+5 V dc on the middle spade ofthe cable and ground on the topspade of the cable.

If voltage is not present, see RIPcard service check onpage 2-46.

Replace the switch if faulty.


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2-22 Service Manual

7001001

Dead machine service check

Perform this service check when there is no activity at power up.

FRU Action

LVPSRIP cardMain wiring harness

Ensure the MFP is plugged in.

Note: Check the AC line voltage.Voltage should be within thefollowing limits:

100 V ac - 127 V ac for thenominal - 110 V model printer

200 V ac - 240 V ac for thenominal- 220 V model printer

If the line voltage checks out,perform the LVPS service check.See Low voltage power supply(LVPS) service check onpage 2-24 for more information.

If the line voltage fails, replace theLVPS.

If the LVPS passes, check thecontinuity of the cable from CN2 onthe LVPS.

If the cable checks out, replacethe RIP card.

If the cable fails, replace the mainharness assembly.

Note: Before replacing the RIP card,inspect the wiring around and behind

the RIP cage for signs of damagedinsulation. A short can cause thedevice to not start.


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7001001

E-mail service check

FRU Action

Have customer verify the e-mailsettings using the MFPs built in Webserver.

Check X422 Users Referenceforsetting instructions.

Note: Failure to connect to the Webserver may indicate a problem with

either the network or the NIC on theMFP.

If the e-mail settings check out,perform the network printing servicecheck. See Network printingservice check on page 2-31 formore information.


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2-24 Service Manual

7001001

Low voltage power supply (LVPS) service check

FRU Action

Low voltage power supply card(LVPS) (110 V and 220 V)

Unplug the power cord and verifythat the cable is correct andfunctioning. Replace if necessary.

With the power cord unplugged,disconnect the 12pin and 4pinconnectors from the LVPS.

On the 12pin connector (pin 1 is

closest to the HVPS), verify pins1, 2, 7, 8, and 9 are ground.

Replug the power cord and turn theMFP on.

CAUTION: Be careful to notground pins to cage whiletesting.

Verify pins 5 and 6 are +5 V dc. Verify pins 10, 11 and 12 are

+24 V dc. Verify pin 1 of the 4pin connector

(also closest to the HVPS) is+5 V dc.

If any one of these are incorrect,replace the LVPS.


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7001001

Fuser service check

When toner is partially fused to the paper, it is usually caused by lowfuser temperature.

Warning: Avoid handling the lamp as much as possible as it iseasily broken. Be careful not to touch the glass housing with barehands, as skin contains acids that can weaken the glass.

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

100 V ac127 V ac for the nominal110 V model MFP

200 V ac240 V ac for the nominal220 V model MFP


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2-26 Service Manual

7001001

Cold fuser service check

FRU Action

Fuser lampLamp cableLVPS

Note: Ensure the proper lamp isinstalled.

Unplug the MFP and disconnect thefuser lamp cable from the LVPS cardconnector (CN3). See Low voltagepower supply (LVPS) on page 5-9for more information.

Check for continuity across the fuserlamp. (Pins 1 and 2)

If there is continuity, go to step 1. Ifthere is no continuity, go to step 2.

Step 1: Continuity

Reconnect the fuser lamp cable atCN3.

Replug and turn the MFP on.

Measure the voltage at connector CN4on the LVPS. It should match the linevoltage.

If line voltage is not present, replacethe LVPS.

Make sure the fuser thermistor iscorrectly connected to the RIP card(J29). If the problem persists,disconnect the thermistor cable fromthe RIP card assembly and check for+4 V to +5 V dc. See Locations onpage 5-1 for more information.

If the voltage is incorrect, see RIPcard service check on page 2-46.

Step 2: NoContinuity

Unplug the MFP and check the lampcable for continuity.

If correct, replace the lamp. If incorrect, replace the lamp cable.


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7001001

Make sure the correct voltage lamp is installed. The voltage rating isstamped on one of the lamp contacts.

FRU Action

Fuser assembly If the fuser lamp comes on and afuser failure error code displays, besure the thermistor is contacting thehot roll and the thermistor cable isfirmly seated in connector J29 on theRIP card assembly. (The thermistorcable goes through the frame by wayof a connector.)

Check for excessive toner buildup onthe surface of the thermistor. Cleanas necessary.

Unplug the MFP and disconnect thethermistor cable from the RIP card(J29).

Measure the resistance of the

thermistor. The resistance measuresapproximately 245K ohms when cool(approximately 40C) and2K3K ohms hot.

Replace the fuser assembly asnecessary.


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2-28 Service Manual

7001001

Hot fuser service check

Make sure the correct voltage lamp is installed. The voltage rating isstamped on one of the lamp contacts.

FRU Action

Lamp

Fuser assembly

Unplug the MFP and make sure thetermister is properly connected inJ29 on the RIP card. Measure theresistance of the thermistor.

The resistance measuresapproximately 245K ohms when cool(approximately 40C) and2K3K ohms hot.

Replace the fuser assembly asnecessary.


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7001001

Continuity check on HVPS/cartridge

Continuity between the HVPS and the charge roll, Dr. B (blade), TAR(toner adder roll), the developer roll, and the photoconductor (DC)can be checked as follows:

FRU Action

HVPSLeft guide assemblyCartridge contacts

1. Turn MFP off.2. Remove the right side cover.

See Right side coverremoval on page 4-13 for

more information.3. Remove the print cartridge.4. Check from C on the HVPS to

the bearing on the left side ofthe charge roll. See Highvoltage power supply(HVPS) on page 5-8 for moreinformation.

5. Check from the Dr. B, TAR,

DEV, T, and DC(photoconductor) respectivelyto the corresponding pin onthe right side frame where theprint cartridge makes itscontacts.

If any show discontinuity,remove the HVPS and checkthe cartridge contact

assemblies (springs) forcontinuity and damage.

If the charge roll and the cableat C show discontinuity,replace the left guideassembly. See High voltagepower supply (HVPS) onpage 5-8 for testing the PCB.


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2-30 Service Manual

7001001

Main motor service check

FRU Action

Main motorMain motor cable

Verify +24 V dc on pin 7 at J14 onthe RIP card assembly.

If the voltage is correct, check themain motor cable for continuity.

If the voltages are not correct, seeLow voltage power supply(LVPS) service check onpage 2-24 or replace the RIP card

assembly.

Note: Always check printheadalignment after replacing the RIPcard assembly. See Printheadalignment adjustment onpage 4-2 for hardware alignmentof the printhead.

If continuity exists on each wire,

replace the main motor.

If continuity does not exist on one ormore of the wires, replace the motorcable.


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7001001

Network printing service check

FRU Action

RIP card 1. Check the lights on the MFP NIC. If the lights work, ping the IP

address of the MFP.Note: The IP address is in theTCP/IP menu nested in theNetwork/USB menu in theAdministrator menu.

If the lights to the NIC are notlighting up, test the MFP with anetwork cable that is known towork.

If the lights do not illuminate with aknown good cable, replace theRIP card.

If the IP address of the MFP is169.254.xxx.xxx and thecustomers network uses DHCP to

assign IP addresses, have thenetwork administrator manuallyassign an address to the MFP.Ping the manually assignedaddress.

If this fails, call tech support to seeif there is a firmware update toaddress this issue. If the firmwaredoes not resolve the issue,replace the RIP card.


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2-32 Service Manual

7001001

Operator panel service check

Inspect the operator panel cable for damage. Make sure the cable isplugged in securely.

Run POST and check each light for proper operation.

FRU Action

Operator panelOPU - RIP cableRIP card

1. Check J6 on the RIP cardassembly.Verify +5V on pins 1, 2, 15, 23,

and 24.If any pin does not have +5V,replace the RIP card.

2. Check the OPU-RIP cable forcontinuity. Replace as necessary.

3. If the RIP card and operator panelcable check out, replace theoperator panel.

4. Perform operator panel test indiagnostics mode. Replace

operator panel as necessary.


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7001001

Paper feed service checks

Paper picks and advances approximately 4 inches

FRU Action

Plate assembly (reference edge)Paper feed gearDrive assembly

Turn MFP off and remove the printcartridge and left side cover.

With a left finger, rotate the mainmotor counterclockwise while usinga right finger to resist gearmovement in the plate assembly(reference edge) in the paper pathbelow the cartridge.

If the gear motion can be stoppedwhile continuing to rotate the drivemotor, one of the units has to bereplaced. The paper feed gear ismost likely the failing part.

Remove the drive assembly forfurther inspection. Replace the faultyunit.

When the plate assembly isreplaced, it has to be adjusted. SeePaper feed adjustment onpage 4-2 for more information.


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2-34 Service Manual

7001001

Paper jam error indication during POST

FRU Action

Stack control flagsPhoto sensor

If the exit sensor flag is not restingwithin the paper exit sensor duringPOST, the MFP indicates Removepaper from standard output bin.Perform a base sensor test to ensurethe exit sensor is operating correctly.

Make sure the flag is operatingfreely.

Replace the photo sensor and/or thestack control flag as necessary.

Photo sensors (paper path) Make sure the input paperfeedsensor is working properly. A stuckor incorrectly installed sensorcauses this error.

200 Paper Jam. Remove print

cartridge to check for paper,damaged flags, or malfunctioningsensors.

201 Paper Jam. Remove printcartridge to access and checkunder and/or inside the rear doorfor jammed paper.

202 Paper Jam. Open rear doorand check for a damaged flag,malfunctioning sensor at the fuser

exit, or a paper jam inside the reardoor.

250 Check MP Feeder. Check forpaper jam in the MPF or amalfunctioning MPF sensor.

230 Paper Jam. Check thesensor in the duplex path for a jamor a malfunction.


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7001001

Paper picks during POST and/or continuously

FRU Action

Paper feed assemblyPaper feed solenoid

Check the pick roller clutch for wear.The solenoid interacts with theclutch controlling motion of the pickroller.

If the cam surface of the pick rollerclutch assembly is worn, thesolenoid may not stop the Droll(pick roll) from rotating. Replace the

paper feed assembly if necessary.

Make sure the spring on the solenoidis properly installed. If the spring isimproperly installed or missing, thepick roller will continuously pickpaper.

Replace the solenoid.


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2-36 Service Manual

7001001

Paper picks but stops half way through the MFP

FRU Action

Input paper feed sensorRIP card assembly

Perform base sensor test to ensurethe input paper feed sensor isworking properly.

Check for a broken or stuck flag onthe input paper feed sensor.

Make sure the cable is seated on theRIP card assembly (J31).

Verify +5 V dc on pins 1, 4, 7, andground on pins 3, 6, and 9. SeeLocations on page 5-1 for moreinformation.

If correct, replace the input paperfeed sensor.

If the voltage is not correct,replace the RIP card assembly.

Note: Always check printheadalignment after replacing the RIPcard assembly. See Printheadalignment adjustment onpage 4-2 for hardware alignmentof the printhead.


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7001001

Paper never picks

FRU Action

Paper tray Make sure the paper tray and paperare correctly positioned.

Check the input tray for missing orbroken parts.

Replace the tray as necessary.

Paper feed solenoid

RIP card assembly

Make sure solenoid is installed

correctly and its cable is plugged intothe RIP card assembly. SeeLocations on page 5-1 for moreinformation.

Verify approximately 40 ohms inthe solenoid. If not correct,replace the solenoid.

Verify the solenoid has the springin place and functions

mechanically. If this is true and theresistance is correct, replace theRIP card assembly.

Note: Always check printheadalignment after replacing the RIPcard assembly. See Printheadalignment adjustment onpage 4-2 for hardware alignment

of the printhead.


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2-38 Service Manual

7001001

Paper occasionally picks or picks multiple sheets at once

Paper trees, wrinkles, stacks poorly or curls

FRU Action

Paper feed rollDroll at Tray 1 springPaper feed assembly

Check the paper feed roll (Droll/pickroll) for wear. Replace as necessary.

Verify that the extension spring isworking properly. If not, replace thespring.

If the paper feed roll shaft rotatesfreely, replace the paper feed

assembly.

Note: We recommend that the paperfeed roll be replaced when the paperfeed assembly is replaced.

FRU Action

Fuser assembly This problem is most likely due to aworn backup roller. A worn backuproller causes the MFP to run hotterthan required for the media beingprinted. Excessive heat can causepaper treeing problems, poorstacking, or curl.


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7001001

Print quality service checks

Blank Page

FRU Action

Print cartridge Remove the print cartridge andgently shake the assembly to evenlydistribute the toner.

Ensure clean electrical contacts onthe right side.

PrintheadPrinthead cableHVPSRIP card assemblyCartridge contacts assembly

Blank pages can be caused by adefective printhead assembly, highvoltage power supply, or RIP cardassembly. See RIP card servicecheck on page 2-46 and verify therequired voltages and proper groundat connectors J1 and J3.

With the cartridge removed and theMFP off, check continuity betweenHVPS (DC designation on outside ofcard) and the PC pin inside theprinter. The PC pin is directly abovethe transfer roll gear.


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2-40 Service Manual

7001001

(continued)

PrintheadPrinthead cableHVPSRIP card assemblyCartridge contacts assembly

If the voltages are correct, check the

printhead cable for continuity. If the cable measures continuity,

replace the printhead. If the cable does not measure

continuity, replace the cable.

See High voltage power supply(HVPS) on page 5-8 and verify thevoltages.

If the +24 V dc and +5 V dc inputvoltage measurements arecorrect, replace the HVPS.

If the voltages are incorrect,replace the RIP card assembly.

Note: Always check printheadalignment after replacing the RIPcard assembly. See Printhead

alignment adjustment onpage 4-2 for hardware alignmentof the printhead.

FRU Action


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7001001

Black page

Note: Incorrect laser exposure or incorrect charging of thephotoconductor by the charge roll causes an all black page.

FRU Action

HVPS contacts Check the contacts forcontamination and correctinstallation. Replace as necessary.

RIP card assemblyController card

HVPS cableHVPSLeft guide assembly

Ensure the HVPS to RIP card andcharge roll cables are correctly

installed.

Check continuity of the charge rollcable from C (printed on outsideHVPS) to the bushing at the rightside of the charge roll.

If continuity fails, replace the leftguide assembly.

Check continuity from the charge rollleft side bushing to the right sideshaft.

If continuity fails, remove thecharge roll and clean the left sideshaft and bushing.

See High voltage power supply(HVPS) on page 5-8 and check thevoltage measurements.

If the +24 V dc and +5 V dc inputvoltages are correct, replace theHVPS.

If the voltages are not correct, seeRIP card service check onpage 2-46.

Check continuity on the HVPS/

RIP card cable.


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2-42 Service Manual

7001001

Heavy background

Poor development or poorly charged toner particles cause excessivebackground. This is more noticeable as the print cartridge nears end

of life.

FRU Action

Print cartridge (not a FRU) Make sure the print cartridge iscorrectly installed and the highvoltage contacts are clean.

If the cartridge is installed correctlyand the problem persists, try a newcartridge.

HVPS contactsHVPS cardRIP card assemblyCartridge contacts assembly

Check the contacts for correctinstallation and contamination wherecontact is made with the printcartridge and HVPS card. Clean asnecessary.

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

HVPS card RIP card assembly

Note: Always check printheadalignment after replacing the RIPcard assembly. See Printhead

alignment adjustment onpage 4-2 for hardware alignmentof the printhead.


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7001001

Partial blank image/white spots (no periodic pattern)

Variation in image density horizontally across page

FRU Action

Print cartridge (not a FRU) Remove the print cartridge andgently shake the assembly to evenlydistribute the toner.

If the print cartridge is low, try a newone.

Fuser backup roll springs(not a FRU)

Fuser assembly

Check springs at each end of thebackup roller to ensure adequate

and even pressure is applied to thefuser hot roll. Replace the fuser ifnecessary.

Paper Make sure recommended paper isbeing used.

FRU Action

Print cartridge The charge roll may have anunbalanced pressure against the PCdrum. Check for equal forces at bothends of the charge roll.

Try a new print cartridge.

Transfer (roll)/bearingsTransfer assembly roll Check the springs and bearings atboth ends of the transfer roller. Thebearing assemblies should supportthe transfer roller, applying evenpressure to the PC drum.

Replace both bearing assemblies ifeither spring shows signs of damageor fatigue.

Inspect the transfer roller for signs ofwear or damage and replace asnecessary.


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2-44 Service Manual

7001001

Poor fusing of image

Light print

FRU Action

Fuser lamp The fuser may not be operating atthe proper temperature to fuse thetoner to the paper. SeeCold fuserservice check on page 2-26.

Make sure recommended paper isbeing used.

FRU Action

Print cartridge Make sure the print cartridge isinstalled correctly and is not low ontoner.

If the problem continues, install a

new print cartridge.

Transfer rollerHVPS contact (transfer roller)HVPS card

Check the transfer roller for signs oftoner buildup and contamination.

Inspect the HVPS contact (transferroller) for contamination.

Inspect the HVPS card forcontamination where it meets the

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x422 Assembly Manual

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