LEXMARK X422 Service Manual

Lexmark™ X422 Laser
• Table of Contents
• Start Diagnostics
• Trademarks
7001–001
• Index
Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
7001–001
Edition: April 2004 The following paragraph does not apply to any country where such provisions are
inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS
PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions; therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in the products or the programs described may be made 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 at ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. You can purchase additional copies of publications related to this product by calling 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 the manufacturer intends to make these available in all countries in which it operates. Any reference 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 used instead. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by the manufacturer, are the user’s responsibility.
Lexmark, Lexmark with diamond design, MarkNet, MarkVision, and Optra are trademarks of 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.
© 2004 Lexmark International, Inc. All rights reserved.
UNITED STATES GOVERNMENT RIGHTS
This software and any accompanying documentation provided under this agreement are commercial computer software and documentation developed exclusively at private expense.
U.S.A. P/N 12G9352
7001-001

Table of Contents

Laser notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii
Safety information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxii
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Maintenance approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
MFP identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
MFP features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Fonts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Memory and user flash memory . . . . . . . . . . . . . . . . . . . . . . . 1-4
Operator panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Print area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Data streams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Paper handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
MFP speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Resolution and print quality. . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
RIP card specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Scanner features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Copier specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Fax specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Special tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Diagnostic information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Attendance and status messages . . . . . . . . . . . . . . . . . . . . . . . 2-2
Operator panel overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Power–on self test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Symptom tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Service error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
iii
7001-001
Service checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18
ADF service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
Cooling fan service check . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20
Cover interlock switch service check . . . . . . . . . . . . . . . . . . .2-21
Dead machine service check . . . . . . . . . . . . . . . . . . . . . . . . .2-22
E-mail service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
Low voltage power supply (LVPS) service check. . . . . . . . . .2-24
Fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25
Cold fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Hot fuser service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28
Continuity check on HVPS/cartridge . . . . . . . . . . . . . . . . . . .2-29
Main motor service check . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30
Network printing service check . . . . . . . . . . . . . . . . . . . . . . .2-31
Operator panel service check. . . . . . . . . . . . . . . . . . . . . . . . .2-32
Paper feed service checks. . . . . . . . . . . . . . . . . . . . . . . . . . .2-33
Print quality service checks . . . . . . . . . . . . . . . . . . . . . . . . . .2-39
RIP card service check . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-46
Scanner/copier service check . . . . . . . . . . . . . . . . . . . . . . . .2-47
Transfer roll service check . . . . . . . . . . . . . . . . . . . . . . . . . .2-48
USB service check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-48
Solving print quality problems . . . . . . . . . . . . . . . . . . . . . . . . . .2-49
Using print quality test pages. . . . . . . . . . . . . . . . . . . . . . . . .2-49
Diagnostic aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Menu descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Entering the diagnostics menu. . . . . . . . . . . . . . . . . . . . . . . . .3-1
Entering the configuration menu . . . . . . . . . . . . . . . . . . . . . . .3-1
Configuration and Diagnostic Menu. . . . . . . . . . . . . . . . . . . . .3-2
Configuration Menu Settings . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Diagnostic mode menu settings. . . . . . . . . . . . . . . . . . . . . . . .3-6
SE Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Hex Trace mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
Flashing firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
System shutdown for flashing or other soft resets . . . . . . . . .3-15
Flashing sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Ways to flash the machine. . . . . . . . . . . . . . . . . . . . . . . . . . .3-17
Repair information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Handling ESD-sensitive parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
iv Service Manual
7001-001
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Paper feed adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Printhead alignment adjustment . . . . . . . . . . . . . . . . . . . . . . . 4-2
Printhead registration adjustment . . . . . . . . . . . . . . . . . . . . . . 4-4
Scanner calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Scanner registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Removal procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
MFP cover removals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
3–pin and 2–pin connectors removal . . . . . . . . . . . . . . . . . . 4-19
Bracket, opener shutter removal. . . . . . . . . . . . . . . . . . . . . . 4-20
Bracket, paper detect (input sensor) removal. . . . . . . . . . . . 4-21
Cartridge coupling assembly removal. . . . . . . . . . . . . . . . . . 4-22
Charge roll removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Cooling fan removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
D–roll tray 1 feed removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
D–roll (tray 1) shaft assembly removal . . . . . . . . . . . . . . . . . 4-26
Door latches (right side) removal . . . . . . . . . . . . . . . . . . . . . 4-28
Duplex tray assembly removal . . . . . . . . . . . . . . . . . . . . . . . 4-29
Fuser assembly, fuser paper exit guide,
Fuser exit sensor, and fuser lamp removal. . . . . . . . . . . . . . 4-30
HVPS card removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
LVPS card removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-40
Lower (MPF) housing assembly removal . . . . . . . . . . . . . . . 4-41
Lower (MPF) housing assembly - paper sensor removal . . . 4-42
Main drive assembly removal . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Main drive motor assembly removal . . . . . . . . . . . . . . . . . . . 4-45
Motor assembly (stepper) removal . . . . . . . . . . . . . . . . . . . . 4-46
MPF roller assembly removal . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Operator panel removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50
Pick pad removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Printhead removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-54
Rear exit door removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55
Reference plate assembly removal. . . . . . . . . . . . . . . . . . . . 4-56
RIP card cage (with card in place) removal . . . . . . . . . . . . . 4-58
Smart button sensor removal . . . . . . . . . . . . . . . . . . . . . . . . 4-63
Terminal assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-64
Tray damper and spring removal . . . . . . . . . . . . . . . . . . . . . 4-65
Transfer roll assembly and left transfer support bearing removal.
4-66
Upper (MPF) housing assembly (with paper flag) removal. . 4-66
v
7001-001
Scanner cover removals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-67
Scanner ADF removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-75
Scanner ADF motor removal. . . . . . . . . . . . . . . . . . . . . . . . . 4-78
Scanner assembly removal. . . . . . . . . . . . . . . . . . . . . . . . . . 4-79
Scanner CCD carriage removal . . . . . . . . . . . . . . . . . . . . . . 4-82
Scanner CCD timing belt removal. . . . . . . . . . . . . . . . . . . . . 4-84
Scanner control unit card removal . . . . . . . . . . . . . . . . . . . . 4-86
Scanner document tray assembly. . . . . . . . . . . . . . . . . . . . . 4-87
Scanner flatbed motor assembly removal. . . . . . . . . . . . . . . 4-88
Scanner ADF pick roller assembly removal . . . . . . . . . . . . . 4-91
Scanner R1 idler removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-92
Scanner R2 idler removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94
Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Cables (continued) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Scanner cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
High voltage power supply (HVPS) . . . . . . . . . . . . . . . . . . . . . . 5-8
Low voltage power supply (LVPS) . . . . . . . . . . . . . . . . . . . . . . . 5-9
RIP card assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
RIP card assembly (continued) . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
SCU connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Scanner sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Lubrication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Safety inspection guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Parts catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
How to use this parts catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-1
Part number index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-1
vi Service Manual

Laser notices

The following laser notice labels may be affixed to this MFP as shown:
Laser advisory label
7001-001
Laser notices vii
7001-001
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, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 60825-1.
Class I laser products are not considered to be hazardous. The printer contains internally a Class IIIb (3b) laser that is nominally a 5 milliwatt gallium arsenide laser operating in the wav elength region of 770-795 nanometers. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition.
Laser
Der Drucker erfüllt gemäß amtlicher Bestätigung der USA die Anforderungen der Bestimmung DHHS (Department of Health and Human Services) 21 CFR Teil J für Laserprodukte der Klasse I (1). In anderen Ländern gilt der Drucker als Laserprodukt der Klasse I, der die Anforderungen der IEC (International Electrotechnical Commission) 60825-1 gemäß amtlicher Bestätigung erfüllt.
Laserprodukte der Klasse I gelten als unschädlich. Im Inneren des Druckers befindet sich ein Laser der Klasse IIIb (3b), bei dem es sich um einen Galliumarsenlaser mit 5 Milliwatt handelt, der Wellen der Länge 770-795 Nanometer ausstrahlt. Das Lasersystem und der Drucker sind so konzipiert, daß im Normalbetrieb, bei der Wartung durch den Benutzer oder bei ordnungsgemäßer Wartung durch den Kundendienst Laserbestrahlung, die die Klasse I übersteigen würde, Menschen keinesfalls erreicht.
viii Service Manual
7001-001
Avis relatif à l’utilisation de laser
Pour les Etats-Unis : cette imprimante est certifiée conforme aux provisions DHHS 21 CFR alinéa J concernant les produits laser de Classe I (1). Pour les autres pays : cette imprimante répond aux normes IEC 60825-1 relatives aux produits laser de Classe I.
Les produits laser de Classe I sont considérés comme des produits non dangereux. Cette imprimante est équipée d’un laser de Classe IIIb (3b) (arséniure de gallium dune puissance nominale de 5 milliwatts) émettant sur des longueurs donde comprises entre 770 et 795 nanomètres. L’imprimante et son système laser sont conçus pour impossible, dans des conditions normales d’utilisation, dentretien par lutilisateur ou de révision, lexposition à des rayonnements laser supérieurs à des rayonnements de Classe I .
Avvertenze sui prodotti laser
Questa stampante è certificata negli Stati Uniti per essere conforme ai requisiti del DHHS 21 CFR Sottocapitolo J per i prodotti laser di classe 1 ed è certificata negli altri Paesi come prodotto laser di classe 1 conforme ai requisiti della norma CEI 60825-1.
I prodotti laser di classe non sono considerati pericolosi. La stampante contiene al suo interno un laser di classe IIIb (3b) allarseniuro di gallio della potenza di 5mW che opera sulla lunghezza donda compresa tra 770 e 795 nanometri. Il sistema laser e la stampante sono stati progettati in modo tale che le persone a contatto con la stampante, durante il normale funzionamento, le operazioni di servizio o quelle di assistenza tecnica, non ricevano radiazioni laser superiori al livello della classe 1.
Laser notices ix
7001-001
Avisos sobre el láser
Se certifica que, en los EE.UU., esta impresora cumple los requisitos para los productos láser de Clase I (1) establecidos en el subcapítulo J de la norma CFR 21 del DHHS (Departamento de Sanidad y Servicios) y, en los demás países, reúne todas las condiciones expuestas en la norma IEC 60825-1 para productos láser de Clase I (1).
Los productos láser de Clase I no se consideran peligrosos. La impresora contiene en su interior un láser de Clase IIIb (3b) de arseniuro de galio de funcionamiento nominal a 5 milivatios en una longitud de onda de 770 a 795 nanómetros. El sistema láser y la impresora están diseñados de forma que ninguna persona pueda verse afectada por ningún tipo de radiación láser superior al niv el de la Clase I durante su uso normal, el mantenimiento realizado por el usuario o cualquier otra situación de servicio técnico.
Declaração sobre Laser
A impressora está certificada nos E.U.A. em conformidade com os requisitos da regulamentação DHHS 21 CFR Subcapítulo J para a Classe I (1) de produtos laser. Em outros locais, está certificada como um produto laser da Classe I, em conformidade com os requisitos da norma IEC 60825-1.
Os produtos laser da Classe I não são considerados perigosos. Internamente, a impressora contém um produto laser da Classe IIIb (3b), designado laser de arseneto de potássio, de 5 milliwatts ,operando numa faixa de comprimento de onda entre 770 e 795 nanómetros. O sistema e a impressora laser foram concebidos de forma a nunca existir qualquer possiblidade de acesso humano a radiação laser superior a um nível de Classe I durante a operação normal, a manutenção feita pelo utilizador ou condições de assistência prescritas.
x Service Manual
7001-001
Laserinformatie
De printer voldoet aan de eisen die gesteld worden aan een laserprodukt van klasse I. Voor de Verenigde Staten zijn deze eisen vastgelegd in DHHS 21 CFR Subchapter J, voor andere landen in IEC 60825-1.
Laserprodukten van klasse I worden niet als ongevaarlijk aangemerkt. De printer is voorzien van een laser van klasse IIIb (3b), dat wil zeggen een gallium arsenide-laser van 5 milliwatt met een golflengte van 770-795 nanometer. Het lasergedeelte en de printer zijn zo ontworpen dat bij normaal gebruik, bij onderhoud of reparatie conform de voorschriften, nooit blootstelling mogelijk is aan laserstraling boven een niveau zoals voorgeschreven is voor klasse 1.
Lasermeddelelse
Printeren er godkendt som et Klasse I-laserprodukt, i overenstemmelse med kravene i IEC 60825-1.
Klasse I-laserprodukter betragtes ikke som farlige. Printeren indeholder internt en Klasse IIIB (3b)-laser, der nominelt er en 5 milliwatt galliumarsenid laser, som arbejder på bølgelængdeområdet 770-795 nanometer. Lasersystemet og printeren er udformet således, at mennesker aldrig udsættes for en laserstråling over Klasse I-niveau ved normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser.
Laser notices xi
7001-001
Huomautus laserlaitteesta
Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS 21 CFR Subchapter J -määrityksen mukainen ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen mukainen.
Luokan I laserlaitteiden ei katsota olevan vaarallisia käyttäjälle. Kirjoittimessa on sisäinen luokan IIIb (3b) 5 milliwatin galliumarsenidilaser, joka toimii aaltoalueella 770 - 795 nanometriä. Laserjärjestelmä ja kirjoitin on suunniteltu siten, että käyttäjä ei altistu luokan I määrityksiä voimakkaammalle säteilylle kirjoittimen normaalin toiminnan, käyttäjän tekemien huoltotoimien tai muiden huoltotoimien yhteydessä.
VARO! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.
VARNING! Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen.
Laser-notis
Denna skrivare är i USA certifierad att motsvara kraven i DHHS 21 CFR, underparagraf J för laserprodukter av Klass I (1). I andra länder uppfyller skrivaren kraven för laserprodukter av Klass I enligt kraven i IEC 60825-1.
Laserprodukter i Klass I anses ej hälsovådliga. Skrivaren har en inbyggd laser av Klass IIIb (3b) som består av en laserenhet av gallium-arsenid på 5 milliwatt som arbetar i våglängdsområdet 770- 795 nanometer. Lasersystemet och skrivaren är utf ormade så att det aldrig finns risk för att någon person utsätts för laserstrålning över Klass I-nivå vid normal användning, underhåll som utförs av användaren eller annan föreskriven serviceåtgärd.
xii Service Manual
7001-001
Laser-melding
Skriveren er godkjent i USA etter kravene i DHHS 21 CFR, underkapittel J, for klasse I (1) laserprodukter, og er i andre land godkjent som et Klasse I-laserprodukt i samsvar med kravene i IEC 60825-1.
Klasse I-laserprodukter er ikke å betrakte som farlige. Skriveren inneholder internt en klasse IIIb (3b)-laser, som består av en gallium-arsenlaserenhet som avgir stråling i bølgelengdeområdet 770-795 nanometer. Lasersystemet og skriveren er utformet slik at personer aldri utsettes for laserstråling ut over klasse I-nivå under vanlig bruk, vedlikehold som utføres av brukeren, eller foreskrevne serviceoperasjoner.
Avís sobre el Làser
Segons ha estat certificat als Estats Units, aquesta impressora compleix els requisits de DHHS 21 CFR, apartat J, pels productes làser de classe I (1), i segons ha estat certificat en altres llocs, és un producte làser de classe I que compleix els requisits dIEC 60825-1.
Els productes làser de classe I no es consideren perillosos. Aquesta impressora conté un làser de classe IIIb (3b) d’arseniür de gal.li, nominalment de 5 mil.liwats, i funciona a la regió de longitud d’ona de 770-795 nanòmetres. El sistema làser i la impressora han sigut concebuts de manera que mai hi hagi exposició a la radiació làser per sobre dun nivell de classe I durant una operació normal, durant les tasques de manteniment dusuari ni durant els serveis que satisfacin les condicions prescrites.
Laser notices xiii
7001-001
Japanese Laser Notice
Chinese Laser Notice
xiv Service Manual
Korean Laser Notice
7001-001
Laser notices xv
7001-001
xvi Service Manual

Safety information

The safety of this product is based on testing and approvals of
the original design and specific components. The manufacturer is not responsible for safety in the event of use of unauthorized replacement parts.
The maintenance information for this product has been
prepared for use by a professional service person and is not intended 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 take necessary precautions.
CAUTION: When you see this symbol, there is a
danger from hazardous voltage in the area of the product where you are working. Unplug the product before you begin, or use caution if the product must receive power in order to perform the task.
Consignes de sécurité
7001-001
La sécurité de ce produit repose sur des tests et des
agréations portant sur sa conception d'origine et sur des composants particuliers. Le fabricant n'assume aucune responsabilité concernant la sécurité en cas d'utilisation de pièces de rechange non agréées.
Les consignes d'entretien et de réparation de ce produit
s'adressent uniquement à un personnel de maintenance qualifié.
Le démontage et l'entretien de ce produit pouvant présenter
certains risques électriques, le personnel d'entretien qualifié devra prendre toutes les précautions nécessaires.
ATTENTION : Ce symbole indique la présence
d'une tension dangereuse dans la partie du produit sur laquelle vous travaillez. Débranchez le produit avant de commencer ou faites preuve de vigilance si l'exécution de la tâche exige que le produit reste sous tension.
Safety information xvii
7001-001
Norme di sicurezza
La sicurezza del prodotto si basa sui test e sull'approvazione
del progetto originale e dei componenti specifici. Il produttore non è responsabile per la sicurezza in caso di sostituzione non autorizzata delle parti.
Le informazioni riguardanti la manutenzione di questo prodotto
sono 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 è più elevato. 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 usare cautela se il prodotto deve essere alimentato per eseguire l'intervento.
Sicherheitshinweise
Die Sicherheit dieses Produkts basiert auf Tests und
Zulassungen des ursprünglichen Modells und bestimmter Bauteile. Bei Verwendung nicht genehmigter Ersatzteile wird vom Hersteller keine Verantwortung oder Haftung für die Sicherheit übernommen.
Die Wartungsinformationen für dieses Produkt sind
ausschließlich für die Verwendung durch einen Wartungsfachmann bestimmt.
Während des Auseinandernehmens und der Wartung des
Geräts besteht ein zusätzliches Risiko eines elektrischen Schlags und körperlicher Verletzung. Das zuständige Fachpersonal sollte entsprechende Vorsichtsmaßnahmen treffen.
ACHTUNG: Dieses Symbol weist auf eine
gefährliche elektrische Spannung hin, die in diesem Bereich des Produkts auftreten kann. Ziehen Sie vor den Arbeiten am Gerät den Netzstecker des Geräts, bzw. arbeiten Sie mit g roßer Vorsicht, wenn das Produkt für die Ausführung der Arbeiten an den Strom angeschlossen sein muß.
xviii Service Manual
Pautas de Seguridad
La seguridad de este producto se basa en pruebas y
aprobaciones del diseño original y componentes específicos. El fabricante no es responsable de la seguridad en caso de uso de piezas de repuesto no autorizadas.
La información sobre el mantenimiento de este producto está
dirigida exclusivamente al personal cualificado de mantenimiento.
Existe mayor riesgo de descarga eléctrica y de daños
personales durante el desmontaje y la reparación de la máquina. El personal cualificado debe ser consciente de este peligro y tomar las precauciones necesarias.
PRECAUCIÓN: este símbolo indica que el voltaje
de la parte del equipo con la que está trabajando es peligroso. Antes de empezar, desenchufe el equipo o tenga cuidado si, para trabajar con él, debe conectarlo.
Informações de Segurança
7001-001
A segurança deste produto baseia-se em testes e aprovações
do modelo original e de componentes específicos. O fabricante não é responsável pela segunrança, no caso de uso de peças de substituição não autorizadas.
As informações de segurança relativas a este produto
destinam-se a profissionais destes serviços e não devem ser utilizadas por outras pessoas.
Risco de choques eléctricos e ferimentos graves durante a
desmontagem e manutenção deste produto. Os profissionais destes serviços devem estar avisados deste facto e tomar os cuidados necessários.
CUIDADO: Quando vir este símbolo, existe a
possível presença de uma potencial tensão perigosa na zona do produto em que está a trabalhar. Antes de começar, desligue o produto da tomada eléctrica ou seja cuidadoso caso o produto tenha de estar ligado à corrente eléctrica para realizar a tarefa necessária.
Safety information xix
7001-001
Informació de Seguretat
La seguretat d'aquest producte es basa en l'avaluació i
aprovació del disseny original i els components específics. El fabricant no es fa responsable de les qüestions de seguretat si s'utilitzen peces de recanvi no autoritzades.
La informació pel manteniment daquest producte està
orientada exclusivament a professionals i no està destinada a ningú que no ho sigui.
El risc de xoc elèctric i de danys personals pot augmentar
durant el procés de desmuntatge i de servei daquest producte. El personal professional ha destar-ne assabentat i prendre les mesures convenients.
PRECAUCIÓ: aquest símbol indica que el voltatge
de la part de l'equip amb la qual esteu treballant és perillós. Abans de començar, desendolleu l'equip o extremeu les precaucions si, per treballar amb l'equip, l'heu de connectar.
xx Service Manual
7001-001
Safety information xxi
7001-001

Preface

This manual contains maintenance procedures for service personnel. It is divided into the following chapters:
1. General information contains a general description of the MFP and the maintenance approach used to repair it. Special tools and test equipment are listed, as well as general environmental and safety instructions.
2. Diagnostic information contains an error indicator table, symptom tables, and service checks used to isolate failing field replaceable units (FRUs).
3. Diagnostic aids contains tests and checks used to locate or repeat symptoms of MFP problems.
4. Repair information provides instructions for making MFP adjustments and removing and installing FRUs.
5. Connector locations uses illustrations to identify the connector locations and test points on the printer.
6. Preventive maintenance contains the lubrication specifications and 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 the
product hardware or software. CAUTION: A caution identifies something that might cause a
servicer harm.
CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the product where you are working. Unplug the product before you begin, or use caution if the product must receive power in order to perform the task.
xxii Service Manual
7001–001

1. General information

The Lexmark X422 multifunction product (MFP), with 128MB of memory standard, a USB port, an integrated Ethernet adapter, and
33.6K baud fax/modem. This chapter provides an overview of the capabilities of the MFP and
available options for each model.

Maintenance approach

The diagnostic information in this manual leads you to the correct field replaceable unit (FRU) or part. Use the error code charts, symptom index, and service checks to determine the symptom and repair the failure. See Diagnostic information on page 2-1 for more information. See Repair information on page 4-1 to help identify parts. After completing the repair, perform tests as needed to verify the repair.
General information 1-1
7001–001

MFP identification

Options

See Options on page 7-22 for a list of options available for the MFP.
1-2 Service Manual

MFP features

Connectivity

Attachments
Standard USB interface Standard Ethernet 10/100 Base–TX Fax modem
Note:
Indicates attachment is part of the model factory shipped
configuration.

Fonts

Fonts / options
PCL bitmapped 2
7001–001
PCL outline 89 PS outline 91 PPDS bitmapped 5 PPDS outline 39
Note: There is no font card support.
General information 1-3
7001–001

Memory and user flash memory

Each model has a standard amount of memory (RAM) soldered on the system card, and a certain number of 100-pin DIMM slots available for installing additional memory or user flash memory options.
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
Note: Indicates option is supported.
✓ ✓ ✓ ✓
✓ ✓
1-4 Service Manual
7001–001

Operator panel

The operator panel consists of a 240 X 64 dot matrix APA LCD and 27 buttons. Four can be illuminated (copy, fax, e-mail and print/ profiles). The display can display eight lines of text with 40 characters each.

Print area

The following print area settings are available.
Print area option
Normal Edge to edge
General information 1-5
7001–001

Print media

The following table shows the supported media, media weights and media textures which together provide optimal print quality across a variety of media.
Media
Paper Card stock Transparency Labels Envelope Cotton paper Bond
Media weights
Heavy Normal Light
Media textures Rough Normal Smooth
Note:
Indicates media is supported.
1-6 Service Manual

Data streams

Data streams
PCL 6 emulation PostScript 3 emulation PPDS PDF (version 1.3)
Note: Indicates data stream is supported.
PCL 6 emulation includes the PCL 5e and PCL XL interpreters,
and is fully compatible with Hewlett P ackard’s LaserJet 5 Family .
Furthermore, the MFP PCL emulation is backward compatible
with the Lexmark T 520/522/620/622 and other members of
Lexmarks Optra family of laser printers.
7001–00x supports version 3010 of the Adobe definition of
PostScript 3, and the interpreter is backward compatible with
the Optra T 520/522/620/622 and other members of Lexmark’s
Optra family of laser printers.
PPDS is backward compatible with Optra T 520/522/620/622
and Lexmarks Optra family of laser printers. The PPDS
interpreter is inactive as a factory default. It must be activ ated
using a PJL command or operator panel operation before it can
be used.
7001–001
General information 1-7
7001–001

Paper handling

Paper handling
Standard Standard input sources:
Integrated 250–sheet tray
The 250–sheet drawer supports the following sizes: A4, A5, JIS B5, folio, letter, legal, executive, and statement.
Multipurpose feeder
Standard output destination
150–sheet sensing bin
Standard duplex Envelope conditioning
Options
Maximum # of optional drawers 1 Optional drawers:
250sheet drawer
500sheet drawer
The 500–sheet drawer supports the following sizes: A4, JIS B5, f olio, letter, legal, and executive.
Maximum # of media input sources 3
2 1
1
1
1
✓ ✓
Maximum input sheet capacity (excluding envelopes)
Notes:
Indicates associated capability is supported.
Assumes 20 lb xerographic paper.
The user must choose between the 250sheet and
500
sheet optional drawers when adding additional paper
sources.
1-8 Service Manual
850

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
7001–001
General information 1-9
7001–001

Resolution and print quality

Note:
IET, PictureGrade, print resolution, print darkness, and toner
saver can all be set independently of each other through the data stream.
Operator panel menus let a user independently set
PictureGrade, and print resolution.
The IET setting is implicitly selected when a particular print
resolution is selected using the Quality Menu.
Toner saver and print darkness settings are implicitly set when a
particular toner darkness is selected using the Quality Menu.
Print quality setting
Print resolution:
300 dpi
600 dpi
1200 IQ dpi
Image Enhancement Technology (IET): 2 Bits/Pel
Toner saver Print darkness PictureGrade
Note:
Indicates print quality setting is supported.
✓ ✓ ✓
1-10 Service Manual

RIP card specifications

Feature
7001–001
Processor PMC Sierra
Processor/Bus frequency 300/100 MHz Synchronous DRAM 2–128 Mbit NAND flash 1–64 Mbit Processor internal bus width capability 64 Bit RIP SRAM 0KB
RM5231A

Supplies

Print cartridge Average yield
Print cartridges 6,000
12,000
Approximate
coverage
5% 5%
General information 1-11
7001–001

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)
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 supported without size sensing.
Supported pixel depth
1 bit (mono)
8 bit (mono)
24 bit (color)
16 ppm 8 ppm 10 ppm 5 ppm
ADF Yes
Yes Yes Yes Yes Yes Yes Yes
Max output resolution (dpi) for setting
600 x 600 600 x 600 300 x 300
Flatbed Yes
Yes Yes Yes
No
No Yes Yes
1-12 Service Manual
7001–001

Scanner resolutions per mode:

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 Scan–to–host 75 dpi 75 x 75 600 scan, 300 feed Scan–to–host 150 dpi 150 x 150 600 scan, 300 feed Scan–to–host 200 dpi 200 x 200 600 scan, 300 feed Scan–to–host 300 dpi 300 x 300 600 scan, 300 feed Scan–to–host 400 dpi
(mono only) Scan–to–host 600 dpi
(mono only)
400 x 400 600 scan, 600 feed
600 x 600 600 scan, 600 feed

Copier specifications

Function Description
Speed Simplex - 22 ppm (scan once / print
Time to first copy (text / mixed)
Copy resolution Output resolution - 600 x 600 dpi (based
Duplex input Manual Duplex output Standard Collation Yes
many)
Duplex - 12 ppm (scan once / print many)
From Power Save - 45 to 80 seconds
From Stand By / Ready - 20 seconds
on a 600 x 300 optical resolution)
General information 1-13
7001–001

Fax specifications

Function Description
Transmission rate Approximately 3 seconds per page Modem 33.6 kpbs Compression MH, MR, MMR, Super G3 Resolution 200 x 100 dpi
Speed dial 300 (based on 10–digit phone numbers) Group fax Supported by speed dial (shortcuts) Broadcast 46 locations (based on 10 digit numbers
Manual fax Yes Fax from PC Supported using PS driver for both local
400 x 400 dpi
with a maximum of 512 characters
and network attach modes

Serial number

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

Special tools

Long Phillips screwdriver (approximately 6–inch shank) Slotted screwdriver Small Phillips screwdriver
When taking voltage readings, alwa ys use the MFP frame as g round unless another ground is specified.
1-14 Service Manual

Acronyms

ADF Automatic Document Feed AFE Analog Front End ASIC Application Specific Integrated Circuit CCharge Roll CCD Charge Couple Device CCW Counterclockwise CW Clockwise DC Direct Current DEV Developer Roll DIMM Dual Inline Memory Module DNSFBP Danish, Norwegian, Sw edish, Finnish, Brazilian
Portuguese DPI Dots Per Inch DRAM Dynamic Random Access Memory EOLS End Of Line Sensing FFC Flexible Flat Cable FIGSD French, Italian, German, Spanish, Dutch FRU Field Replaceable Unit GND Ground HVPS High Voltage Power Supply IDE Integrated Development Environment IET Image Enhancement Technology INA Internal Network Adapter IQ Image Quality KB Kilobyte KBPS Kilobits Per Second (usually as Kbps) /
Kilobytes Per Second (usually as KBps) LCD Liquid Crystal Display LED Light–Emitting Diode LSU Laser Scanning Unit LVPS Low Voltage Power Supply MFP Multifunction Product MH Message Handling MHz Megahertz MMR Modified Modified Read MPF Multipurpose Feeder MR (Modem) Modem Ready NAND Not And (Gate) NVRAM Nonvolatile Random Access Memory OPU Operator panel Unit
7001–001
General information 1-15
7001–001
PCB Printed Circuit Board PCL 6 Printer Command Language PJL Printer Job Language POR Power–On Reset POST Power–On Self Test PPDS Personal Printer Data Stream PS PostScript PWB Printed Wiring Board RIP Raster Image Processor ROM Read Only Memory RS Recommended Standard SCU Scanner Control Unit SE Systems Engineer T Transfer (Roll) TAR Toner Adder Roll USB Universal Serial Bus Vac Volts Alternating Current
1-16 Service Manual

2. Diagnostic information

Start

Unplug power from the MFP before connecting or disconnecting any cable, assembly, or electronic card. This is a precaution for personal safety and to prevent damage 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.
7001–001
Diagnostic information 2-1
7001–001

Attendance and status messages

Error code
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
Attendance message description
Change cartridge invalid refill Change <source> <new media> Close door or insert cartridge Insert Tray 1 Invalid UAA Load <source> <new media> Load manual <new media> Remove standard paper bin
Insufficient memory for Flash Memory Defragment operation
Insufficient memory, some Held Jobs may be lost 38 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
2-2 Service Manual
7001–001
Error code
55 Unsupported Flash in slot <x>
56 Standard USB Port Disabled 88 Toner low
Error code
200 Paper jam, remove print cartridge to access (MFP input
201 Paper jam, remove print cartridge to access (between MFP
Attendance message description
Unsupported Memory in slot <x>
Scanner ADF cover open Scanner registration successfully completed Scanner registration failed
Paper jam status messages
sensor)
input and exit sensor) 202 Paper jam, open rear door to access 230 Paper jam, check duplex 250 Paper jam, check MP feeder 290 Scanner jam, remove all originals from scanner
Replace originals if restarting job
Diagnostic information 2-3
7001–001

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 eight lines 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.)
2-4 Service Manual
7001–001

Power–on self test (POST)

When you turn the MFP on, it performs a Power–On Self Test. With all the cables connected, the MFP completes POST between 15–20 seconds in the following sequence:
1. The four blue LEDs light and immediately revert to three illuminated LEDs.
The display shows a series of dots across the screen. The MFP is performing the memory test.
2. Then, two LEDs are illuminated and the display shows the amount 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 is
tested, the scanner calibrates, and the drive motor and the printhead motors run.
Note:
If non-critical sections of NVRAM, or factory defaults ARE
being restored from the configuration menu, the display message is RESTORING FACTORY DEFAULTS’ for a minimum of three seconds.
If the firmware has detected a version change,
PERFORMING SELT TEST’ is displayed for a minimum of three seconds.
If all NVRAM settings are being reset, ‘RESETTING ALL OF
NVRAM’ is displayed for a minimum of three seconds.
Diagnostic information 2-5
7001–001
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, remov e any optional RAM from the RIP card. Restart the machine. If the problem persists, replace the RIP card.
If POST begins, but the ADF, scanner calibration, and motor test dont start, check connections on the RIP card. Replace the RIP card as necessary.

Symptom tables

Check for correct POST functions of the MFP by observing the following symptoms:
See Poweron self test (POST) on page 2-5 for more information.
2-6 Service Manual

POST symptom table

Symptom Action
7001–001
The main motor, cooling fan and fuser do not come on.
POST completes except one or more lights do not come on.
None of the lights come on. See the Operator panel service
Main motor does not come on. See the Main motor service
Fan does not come on. See the Cooling fan service
Fuser lamp does not come on. See the Cold fuser service
Fuser lamp never turns off. See the Hot fuser service check
The paper feed picks and tries to feed paper.
LEDs on operator panel, and display fail to illuminate. Fan runs continuously.
Scanner locked power off and Restart message appears when scanner is unlocked.
See the Cover interlock switch
service check on page 2-21.
See the “Operator panel service
check on page 2-32.
check on page 2-32.
check on page 2-30.
check on page 2-20.
check on page 2-26.
on page 2-28.
See the “Paper feed service
checks on page 2-33.
See the “Operator panel service
check on page 2-32.
See the “Scanner/copier service
check on page 2-47.
ADF pick roller , or motor does not run during start up.
operator panel lights function properly at POST, but the display is blank.
Machine POSTS and enters operations mode but one or more buttons are not functioning.
See the ADF service check on
page 2-19.
See the “Operator panel service
check on page 2-32.
See the “Operator panel service
check on page 2-32.
Diagnostic information 2-7
7001–001

MFP symptom table

Symptom Action
Dead machine (no power) See the Dead machine service
Fan noisy or not working See the Cooling fan service
Fuser parts melted See the Hot fuser service check
Fuser lamp doesnt light See the Cold fuser service
Toner not fused to the paper See the Poor fusing of image on
Blank page See the Blank Page on
Black page See the Black page on
Heavy background See the Heavy background on
Light print See the Light print on page 2-44. White or black lines or bands See the White or black lines or
Toner on back of page See the Toner on back of page
check on page 2-22.
check on page 2-20.
on page 2-28.
check on page 2-26.
page 2-44.
page 2-39.
page 2-41.
page 2-42.
bands on page 2-45.
on page 2-45.
Paper jams See the “Paper feed service
checks on page 2-33.
Main motor noisy or does not move
Paper never picks See the Paper never picks on
Paper feeds continuously See the P aper pic ks during POST
See the Main motor service
check on page 2-30.
page 2-37.
and/or continuously” on page 2-35.
2-8 Service Manual
Symptom Action
7001–001
Paper skew See the Note regarding alignment
MFP not communicating with host See Network printing service
Paper wrinkled or bent See Paper trees, wrinkles,
Top cover will not close See Cover interlock switch
Operator panel button does not respond
MFP not communicating with host over network
on page 4-57 or Paper feed
service checks on page 2-33.
check on page 2-31.
stacks poorly or curls” on page 2-38.
service check on page 2-21.
See “Operator panel service
check on page 2-32 or RIP card service check on page 2-46.
See “Network printing service
check on page 2-31.
Diagnostic information 2-9
7001–001

Scanner / copier symptom table

Symptom Action
Machine boots, but LCD posts a Scanner Locked Power off and Restart attendance message.
Documents dont feed into ADF. Scanner jam (290) error.
Paper feeds into ADF, but jams in the ADF. Error 290 generated.
ADF runs paper through, but no copy is made. Error 290 generated.
Scanner does not respond to scan command from attached computer.
1. Check whether scanner CCD is locked.
2. Perform scanner service check. See Scanner/copier service
check on page 2-47 for more
information.
1. Check for dirty sensors.
2. Check the paper present sensor (using the scanner sensor test in diagnostics). Replace as necessary.
3. Check continuity of scanner – ADF motor cable.
If good, replace ADF motor.If bad, replace ADF motor
cable.
Perform ADF service check. See
ADF service check on page 2-19
for more information. Perform ADF service check. See
ADF service check on page 2-19
for more information. Perform USB service check. See
USB service check on page 2-48
for more information.
2-10 Service Manual
Symptom Action
7001–001
RIP software error on startup. 1. Check the connections on all
Scanner repeatedly gives the user a Scan Locked Power off and Restart message when the scanner is actually unlocked.
Scanner repeatedly reports 290 error.
cables to the RIP card to the SCU card.
2. Check for loose connectors, bent or broken pins on the connectors. Ensure the individual wires are secure 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 the power cable connecting the RIP card to the SCU.
If they fail, replace the RIP card. If the cable checks out, replace the
SCU. If it fails, replace the cable.
See Scanner/copier service
check on page 2-47 for more
information.
See Scanner/copier service
check on page 2-47 for more
information.

E-mail symptoms

Symptom Action
Scanner runs, mail confirmation failure.
Weblink fails. 1. Check that the FTP server is on
Perform E-mail service check. See
E-mail service check on page 2-23 for more information.
the network.
2. Check the FTP server IP address.
Diagnostic information 2-11
7001–001

Fax symptoms

Symptom Action
No dial tone. 1. Check that phone line is
Machine dials a number but fails to make a connection with another fax machine.
Incoming fax has blank spaces or poor quality.
Some words on an incoming fax are stretched.
Documents are not stored in memory.
connected properly.
2. Check that the phone socket is working properly. (Test the socket with a phone.)
The other fax machine may be turned off. Ask the fax recipient to check their machine.
1. The sending fax machine may be faulty.
2. The sending fax machine may have a dirty document glass.
3. A noisy phone line can cause errors.
4. Check the MFP print quality by making a copy.
5. The print cartridge may be empty. Replace as necessary.
The sending fax machine had a temporary jam.
There may not be enough memory to store the document.
The machine may display an Insufficient Memory message.
Wait for current jobs to process.
Delete any print and hold jobs that
are not needed.
Install more memory.
Document does not feed. 1. Make sure the document is not
wrinkled and that it has been inserted correctly.
2. Check that the document is the correct size.
2-12 Service Manual
7001–001

Service error codes

Service error codes are generally non–recoverable except in an intermittent condition when a POR of the MFP temporarily recovers from the error condition.
Error code Description Action
900 – RIP software error
902 – Engine software error
920 – Fuser error Fuser below
921 – Fuser error Fuser below standby
922 – Fuser error Fuser failed to reach
923 – Fuser error Fuser too hot during
924 – Fuser error Open circuit in
925 – Fuser error Incorrect fuser lamp
929 – Toner sensor Indicates a problem
Internal RIP software error on the system card.
General internal engine software error on the system card.
temperature when printing.
temperature in idle.
standby temperature.
printing or in idle.
thermistor path.
installed.
with either the toner sensor or print cartridge.
Replace the system card.
Replace the system card.
Perform cold fuser service check to isolate the problem to:
- Fuser lamp
- Lamp cable
- Complete fuser (thermistor)
LVPS Perform hot fuser
service check to isolate the problem to:
- Fuser lamp
- Complete fuser (thermistor)
Test the toner sensor using the "Base Sensor Test" in the diagnostic menu.
If the test fails, replace the sensor.
If the test passes, replace the cartridge.
Diagnostic information 2-13
7001–001
Error code Description Action
931 – Printhead error No first Hsync. Inspect the printhead
932 – Printhead error Lost Hsync. Inspect the printhead
935 – Printhead error Mirror motor unable to
reach operating speed.
cable for continuity / connection.
If the inspection passes, replace the printhead.
cable for continuity / connection.
If the inspection passes, replace the printhead.
Perform voltage check on printhead connector of the RIP card.
If the voltages are incorrect, replace the card.
Inspect the printhead cable for continuity / connection.
If the inspection passes, replace the printhead.
936 – Transport motor Transport motor initial
937 – Transport motor Transport motor lost
939 – RIP - engine communications
940 – LVPS (Low Voltage Power Supply)
lock failure.
lock.
RIP processor cannot communicate with engine processor on RIP card.
There is a failure with the zero crossing signal on the line controlling the fuser lamp.
2-14 Service Manual
Inspect motor, cabling and main drive assembly.
Replace defective parts.
Replace RIP card assembly.
Ensure the proper LVPS is installed.
Error code Description Action
7001–001
941 – Image pipeline An error was detected
with the image pipeline ASIC on the RIP card.
942 – Scanner failure Communication failure.
RIP card cannot establish communications with the scanner card.
943 – Scanner failure Carriage mechanical
failure.
944 – Scanner failure Lamp failure.
One or both of the lamps failed, or the CCD cable has failed.
945 – Scanner failure CCD failure.
Observe debug data of engine microcode.
Replace RIP card assembly, if necessary.
Inspect the RIP–SCU cable for proper connection and conductivity.
If the inspection passes, replace the SCU card.
Check the mechanical movement of the CCD carriage.
Replace the defective component.
Check the CCD cable for proper connection and connectivity.
If inspection passes, replace the CCD carriage.
The CCD circuit on the CCD carriage has failed or the CCD cable has a problem.
946 – Scanner failure CCD calibration error. Perform the scanner
calibration process. Check the CCD cable
for proper connection and connectivity.
If inspection passes, replace the CCD carriage.
Diagnostic information 2-15
7001–001
Error code Description Action
947 – Modem failure Modem card, on the
RIP card, experienced a failure.
948 – Fax storage Flash partition too
small on modem card.
949 – Fax storage Flash partition inv alid
or not available.
952 – NV failure: n NVRAM CRC error
detected. "n" indicates where the error occurred.
953 – NVRAM failure NVRAM chip failure. Replace the operator 954 – NVRAM failure NVRAM CRC failure. 955 – Code CRC Code ROM and NAND
failed the CRC check, or NAND experienced an uncorrectable multi­bit failure.
Replace RIP card assembly.
Reformat from the configuration menu.
If the problem persists, replace the RIP card assembly.
POR the machine to clear the error.
If the problem persists, replace the operator panel.
panel.
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 system
has performed more than 100 shift and re-flash operations as a result of ECC bit
corrections. 959 – System board SRAM failure. Replace the RIP card. 960 – Memory error RAM soldered on RIP
card has failed. 961 – Memory error RAM in slot 1 is
defective.
Replace the RIP card.
Replace the RIP card.
Replace the DIMM in slot 1.
2-16 Service Manual
Error code Description Action
7001–001
962 – Memory error RAM in slot 2 is
965 – Panel failure The engine is
976 – Standard network
defective.
experiencing failures sending commands to the operator panel.
Unrecoverable softw are error in the network port.
Replace the DIMM in slot 2.
Inspect the operator panel RIP cable for connectivity and continuity.
If the cable passes, replace the operator panel.
If the cable fails, replace the RIP card.
Replace the RIP card.
Diagnostic information 2-17
7001–001

Service checks

Service checks involve measuring voltages of the LVPS, HVPS, SCU, and RIP card assemblies. Continuity and resistance verifications are done on cables and components as required.
Note: When looking at the printed side of a PCB, connectors are designated with “J” followed by a number. On the SCU card, the connectors are designated with a CN followed by a number. Pin 1 is designated on the PCB by an adjacent “1” or triangle. Pin numbers index sequentially to the opposite end of the connector. See RIP
card assembly on page 5-10 for more information.
2-18 Service Manual

ADF service check

FRU Action
7001–001
ADF assembly SCU card
1. Open the ADF cover and check for obstructions in the paper path.
2. Check the sensors to ensure the flags move freely or dust is not blocking the sensors.
If the ADF makes a copy and generates a 290 error after the last sheet is fed through the ADF, and the error only goes away after a POR, replace the ADF.
If the problem persists, replace the SCU.
If the ADF starts feeding, but prints a blank page generating a 290 error, the paper may or may not feed all the way through the ADF.
POR the machine into diagnostics mode and perform a scanner sensor test on the paper present sensor and the ADF cover sensor .
If the ADF cover sensor remains in the CL setting when actuated and the paper position sensor remains in the OP setting when actuated, replace the SCU card.
If the ADF cover sensor changes to 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 not running during POST.
Check CN5, pins 1 and 2 for +24V.
If +24V, replace the ADF motor assembly.
If not +24V, replace the SCU.
Diagnostic information 2-19
7001–001

Cooling fan service check

FRU Action
Cooling fan Make sure the cooling fan motor
cable plug is properly seated. Turn the MFP off and disconnect the
cooling fan cable at the cooling fan. Turn the MFP on. Within
approximately 15 seconds the RIP card assembly should apply +24V dc to the fan. See RIP card
assembly on page 5-10 for more
information.
If voltage is present, replace the cooling fan.
If voltage is not present, disconnect the cable from the RIP card (J30) and check for continuity and shorts (connector sockets 1 and 2).
– If the cable is good, see the
RIP card service check on page 2-46 for more
information.
– If the cable is damaged,
replace the cable.
2-20 Service Manual
7001–001

Cover interlock switch service check

Note: Make sure a print cartridge is installed and the cover closes
all the way, engaging the cover open switch lever.
FRU Action
Cover interlock switch Disconnect the cover interlock cable
from the interlock switch. Push the cover interlock switch to
the closed position and verify continuity between the bottom and middle terminals.
Open the switch and verify continuity between the bottom and top terminals. The top and middle terminals indicate discontinuity at all times.
If the switch is good, verify +5 V dc on the middle spade of the cable and ground on the top spade of the cable.
If voltage is not present, see “RIP
card service check on page 2-46.
Replace the switch if faulty.
Diagnostic information 2-21
7001–001

Dead machine service check

Perform this service check when there is no activity at power up.
FRU Action
LVPS RIP card Main wiring harness
Ensure the MFP is plugged in. Note: Check the AC line voltage.
Voltage should be within the following limits:
– 100 V ac - 127 Vac for the
nominal - 110 V model printer
– 200 V ac - 240 Vac for the
nominal- 220 V model printer
If the line voltage checks out, perform the LVPS service check. See Low volta ge power suppl y
(LVPS) service check on page 2-24 for more information.
If the line voltage fails , replace the LVPS.
If the LVPS passes, check the continuity of the cable from CN2 on the LVPS.
If the cable checks out, replace the RIP card.
If the cable fails, replace the main harness assembly.
Note: Before replacing the RIP card, inspect the wiring around and behind the RIP cage for signs of damaged insulation. A short can cause the device to not start.
2-22 Service Manual

E-mail service check

FRU Action
Have customer verify the e-mail settings using the MFP’s b uilt in Web server.
Check X422 User’s Reference for setting instructions.
Note: Failure to connect to the Web server may indicate a problem with either the network or the NIC on the MFP.
If the e-mail settings check out, perform the network printing service check. See Network printing
service check on page 2-31 for
more information.
7001–001
Diagnostic information 2-23
7001–001

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 verify that the cable is correct and functioning. Replace if necessary.
With the power cord unplugged, disconnect the 12–pin and 4–pin connectors from the LVPS.
On the 12–pin connector (pin 1 is closest to the HVPS), verify pins 1, 2, 7, 8, and 9 are ground.
Re–plug the power cord and turn the MFP on.
CAUTION: Be careful to not ground pins to cage while testing.
Verify pins 5 and 6 are +5 V dc.
Verify pins 10, 11 and 12 are
+24 V dc.
V erify pin 1 of the 4–pin connector (also closest to the HVPS) is +5 V dc.
If any one of these are incorrect, replace the LVPS.
2-24 Service Manual
7001–001

Fuser service check

When toner is partially fused to the paper, it is usually caused by low fuser temperature.
Warning: Avoid handling the lamp as much as possible as it is easily broken. Be careful not to touch the glass housing with bare hands, as skin contains acids that can weaken the glass.
The line voltage to the MFP must be within the following limits:
100 V ac–127 V ac for the nominal–110 V model MFP
200 V ac–240 V ac for the nominal–220 V model MFP
Diagnostic information 2-25
7001–001

Cold fuser service check

FRU Action
Fuser lamp Lamp cable LVPS
Note: Ensure the proper lamp is installed.
Unplug the MFP and disconnect the fuser lamp cable from the LVPS card connector (CN3). See Low voltage
power supply (LVPS) on page 5-9
for more information. Check for continuity across the fuser
lamp. (Pins 1 and 2) If there is continuity, go to step 1. If
there is no continuity, go to step 2. Step 1: Continuity Reconnect the fuser lamp cable at
CN3. Re–plug and turn the MFP on. Measure the voltage at connector CN4
on the LVPS. It should match the line voltage.
If line voltage is not present, replace the LVPS.
Make sure the fuser thermistor is correctly connected to the RIP card (J29). If the problem persists, disconnect the thermistor cable from the RIP card assembly and check for +4 V to +5 V dc. See Locations on
page 5-1 for more information.
If the voltage is incorrect, see “RIP
card service check on page 2-46.
2-26 Service Manual
Step 2: No Continuity Unplug the MFP and check the lamp
cable for continuity.
If correct, replace the lamp.
If incorrect, replace the lamp cable.
7001–001
Make sure the correct voltage lamp is installed. The voltage rating is stamped on one of the lamp contacts.
FRU Action
Fuser assembly If the fuser lamp comes on and a
fuser failure error code displays, be sure the thermistor is contacting the hot roll and the thermistor cable is firmly seated in connector J29 on the RIP card assembly. (The thermistor cable goes through the frame by wa y of a connector.)
Check for e xcessive toner b uildup on the surface of the thermistor. Clean as necessary.
Unplug the MFP and disconnect the thermistor cable from the RIP card (J29).
Measure the resistance of the thermistor. The resistance measures approximately 245K ohms when cool (approximately 40°C) and 2K–3K ohms hot.
Replace the fuser assembly as necessary.
Diagnostic information 2-27
7001–001

Hot fuser service check

Make sure the correct voltage lamp is installed. The voltage rating is stamped on one of the lamp contacts.
FRU Action
Lamp Fuser assembly
Unplug the MFP and make sure the termister is properly connected in J29 on the RIP card. Measure the resistance of the thermistor.
The resistance measures approximately 245K ohms when cool (approximately 40°C) and 2K–3K ohms hot.
Replace the fuser assembly as necessary.
2-28 Service Manual
7001–001

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
HVPS Left guide assembly Cartridge contacts
1.Turn MFP off.
2.Remove the right side cover. See Right side cover
removal 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 of the charge roll. See High
voltage power supply (HVPS) on page 5-8 for more
information.
5.Check from the Dr. B, TAR, DEV, T, and DC (photoconductor) respectively to the corresponding pin on the right side frame where the print cartridge makes its contacts.
If any show discontinuity, remove the HVPS and check the cartridge contact assemblies (springs) for continuity and damage.
If the charge roll and the cable
at C show discontinuity, replace the left guide assembly. See High voltage
power supply (HVPS) on page 5-8 for testing the PCB.
Diagnostic information 2-29
7001–001

Main motor service check

FRU Action
Main motor Main motor cable
Verify +24 V dc on pin 7 at J14 on the RIP card assembly.
If the voltage is correct, check the main motor cable for continuity.
If the voltages are not correct, see
Low voltage power supply (LVPS) service check on page 2-24 or replace the RIP card
assembly.
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead.
If continuity exists on each wire, replace the main motor.
If continuity does not exist on one or more of the wires, replace the motor cable.
2-30 Service Manual

Network printing service check

FRU Action
7001–001
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 the TCP/IP menu nested in the Network/USB menu in the Administrator menu.
If the lights to the NIC are not lighting up, test the MFP with a network cable that is known to work.
If the lights do not illuminate with a known good cable, replace the RIP card.
If the IP address of the MFP is
169.254.xxx.xxx and the customers network uses DHCP to assign IP addresses, have the network administrator manually assign an address to the MFP. Ping the manually assigned address.
If this fails, call tech support to see if there is a firmware update to address this issue. If the firmware does not resolve the issue, replace the RIP card.
Diagnostic information 2-31
7001–001

Operator panel service check

Inspect the operator panel cable f or damage. Mak e sure the cab le is plugged in securely.
Run POST and check each light for proper operation.
FRU Action
Operator panel OPU - RIP cable RIP card
1. Check J6 on the RIP card assembly. 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 for continuity. Replace as necessary.
3. If the RIP card and operator panel cable check out, replace the operator panel.
4. Perform operator panel test in diagnostics mode. Replace operator panel as necessary.
2-32 Service Manual

Paper feed service checks

Paper picks and advances approximately 4 inches
FRU Action
7001–001
Plate assembly (reference edge) Paper feed gear Drive assembly
Turn MFP off and remove the print cartridge and left side cover.
With a left finger, rotate the main motor counterclockwise while using a right finger to resist gear movement in the plate assembly (reference edge) in the paper path below the cartridge.
If the gear motion can be stopped while continuing to rotate the drive motor, one of the units has to be replaced. The paper feed gear is most likely the failing part.
Remove the drive assembly for further inspection. Replace the faulty unit.
When the plate assembly is replaced, it has to be adjusted. See
Paper feed adjustment on page 4-2 for more information.
Diagnostic information 2-33
7001–001
Paper jam error indication during POST
FRU Action
Stack control flags Photo sensor
Photo sensors (paper path) Make sure the input paperfeed
If the exit sensor flag is not resting within the paper exit sensor during POST, the MFP indicates Remove paper from standard output bin. Perf orm a base sensor test to ensure the exit sensor is operating correctly.
Make sure the flag is operating freely.
Replace the photo sensor and/or the stack control flag as necessary.
sensor is working properly. A stuck or incorrectly installed sensor causes this error.
200 Paper Jam. Remov e print cartridge to check for paper, damaged flags, or malfunctioning sensors.
201 Paper Jam. Remov e print cartridge to access and check under and/or inside the rear door for jammed paper.
202 Paper Jam. Open rear door and check for a damaged flag, malfunctioning sensor at the fuser exit, or a paper jam inside the rear door.
250 Check MP Feeder . Chec k f or paper jam in the MPF or a malfunctioning MPF sensor.
230 Paper Jam. Check the sensor in the duplex path for a jam or a malfunction.
2-34 Service Manual
Paper picks during POST and/or continuously
FRU Action
7001–001
Paper feed assembly Paper feed solenoid
Check the pick roller clutch f or wear. The solenoid interacts with the clutch controlling motion of the pick roller.
If the cam surface of the pick roller clutch assembly is worn, the solenoid may not stop the D–roll (pick roll) from rotating. Replace the paper feed assembly if necessary.
Make sure the spring on the solenoid is properly installed. If the spring is improperly installed or missing, the pick roller will continuously pick paper.
Replace the solenoid.
Diagnostic information 2-35
7001–001
Paper picks but stops half way through the MFP
FRU Action
Input paper feed sensor RIP card assembly
Perform base sensor test to ensure the input paper feed sensor is working properly.
Check for a broken or stuck flag on the input paper feed sensor.
Make sure the cable is seated on the RIP card assembly (J31).
Verify +5 V dc on pins 1, 4, 7, and ground on pins 3, 6, and 9. See
Locations on page 5-1 for more
information.
If correct, replace the input paper feed sensor.
If the voltage is not correct, replace the RIP card assembly.
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead.
2-36 Service Manual
7001–001
Paper never picks
FRU Action
Paper tray Make sure the paper tray and paper
are correctly positioned. Check the input tray for missing or
broken parts. Replace the tray as necessary.
Paper feed solenoid RIP card assembly
Make sure solenoid is installed correctly and its cable is plugged into the RIP card assembly. See
Locations on page 5-1 for more
information.
Verify approximately 40 ohms in the solenoid. If not correct, replace the solenoid.
Verify the solenoid has the spring in place and functions mechanically . If this is true and the resistance is correct, replace the RIP card assembly.
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead.
Diagnostic information 2-37
7001–001
Paper occasionally picks or picks multiple sheets at once
FRU Action
Paper feed roll D–roll at Tray 1 spring Paper feed assembly
Check the paper feed roll (D–roll/pick roll) for wear . Replace as necessary.
Verify that the extension spring is working properly. If not, replace the spring.
If the paper feed roll shaft rotates freely, replace the paper feed assembly.
Note: We recommend that the paper feed roll be replaced when the paper feed assembly is replaced.
Paper “trees,” wrinkles, stacks poorly or curls
FRU Action
Fuser assembly This problem is most likely due to a
worn backup roller. A worn backup roller causes the MFP to run hotter than required for the media being printed. Excessive heat can cause paper treeing problems, poor stacking, or curl.
2-38 Service Manual

Print quality service checks

Blank Page
FRU Action
Print cartridge Remove the print cartridge and
gently shake the assembly to evenly distribute the toner.
Ensure clean electrical contacts on the right side.
7001–001
Printhead Printhead cable HVPS RIP card assembly Cartridge contacts assembly
Blank pages can be caused by a defective printhead assembly, high voltage power supply, or RIP card assembly. See RIP card service
check on page 2-46 and verify the
required voltages and proper ground at connectors J1 and J3.
With the cartridge removed and the MFP off, check continuity between HVPS (DC designation on outside of card) and the PC pin inside the printer. The PC pin is directly above the transfer roll gear.
Diagnostic information 2-39
7001–001
FRU Action
(continued) Printhead
Printhead cable HVPS RIP card assembly Cartridge 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 the
voltages.
If the +24 V dc and +5 V dc input voltage measurements are correct, replace the HVPS.
If the voltages are incorrect, replace the RIP card assembly.
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead.
2-40 Service Manual
Black page
Note: Incorrect laser exposure or incorrect charging of the
photoconductor by the charge roll causes an all black page.
FRU Action
7001–001
HVPS contacts Check the contacts for
RIP card assembly Controller card HVPS cable HVPS Left guide assembly
contamination and correct installation. Replace as necessary.
Ensure the HVPS to RIP card and charge roll cables are correctly installed.
Check continuity of the charge roll cable from C (printed on outside HVPS) to the bushing at the right side of the charge roll.
If continuity fails, replace the left guide assembly.
Check continuity from the charge roll left side bushing to the right side shaft.
If continuity fails, remove the charge roll and clean the left side shaft and bushing.
See High voltage power supply
(HVPS) on page 5-8 and check the
voltage measurements.
If the +24 V dc and +5 V dc input voltages are correct, replace the HVPS.
If the voltages are not correct, see
RIP card service check on page 2-46.
Check continuity on the HVPS/ RIP card cable.
Diagnostic information 2-41
7001–001
Heavy background
Poor de velopment or poorly charged toner particles cause excessive background. This is more noticeable as the print cartridge nears end of life.
FRU Action
Print cartridge (not a FRU) Make sure the print cartridge is
correctly installed and the high voltage contacts are clean.
If the cartridge is installed correctly and the problem persists, try a new cartridge.
HVPS contacts HVPS card RIP card assembly Cartridge contacts assembly
Check the contacts for correct installation and contamination where contact is made with the print cartridge and HVPS card. Clean as necessary.
If this does not correct the problem, replace the following FRUs one at a time in the order shown:
HVPS card
RIP card assembly
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead.
2-42 Service Manual
Partial blank image/white spots (no periodic pattern)
FRU Action
Print cartridge (not a FRU) Remove the print cartridge and
gently shake the assembly to evenly distribute the toner.
If the print cartridge is lo w, try a new one.
7001–001
Fuser backup roll springs (not a FRU) Fuser assembly
Paper Make sure recommended paper is
Check springs at each end of the backup roller to ensure adequate and even pressure is applied to the fuser hot roll. Replace the fuser if necessary.
being used.
Variation in image density horizontally across page
FRU Action
Print cartridge The charge roll may have an
unbalanced pressure against the PC drum. Check for equal forces at both ends of the charge roll.
Try a new print cartridge.
Transfer (roll)/bearings Transfer assembly roll
Check the springs and bearings at both ends of the transfer roller. The bearing assemblies should support the transfer roller, applying even pressure to the PC drum.
Replace both bearing assemblies if either spring shows signs of damage or fatigue.
Inspect the transfer roller for signs of wear or damage and replace as necessary.
Diagnostic information 2-43
7001–001
Poor fusing of image
FRU Action
Fuser lamp The fuser may not be operating at
the proper temperature to fuse the toner to the paper. See Cold fuser
service check on page 2-26.
Make sure recommended paper is being used.
Light print
FRU Action
Print cartridge Make sure the print cartridge is
Transfer roller HVPS contact (transfer roller) HVPS card
installed correctly and is not low on toner.
If the problem continues, install a new print cartridge.
Check the transfer roller for signs of toner buildup and contamination.
Inspect the HVPS contact (transfer roller) for contamination.
Inspect the HVPS card for contamination where it meets the HVPS contacts.
2-44 Service Manual
If all components appear free of contamination, replace the following FRUs one at a time in the order shown:
Transfer roller
HVPS contact (transfer roller)
HVPS card
White or black lines or bands
FRU Action
7001–001
Print cartridge Paper fe ed drive gears
Banding appears as light or dark horizontal lines on a uniformly gray page or on a page with a large area of graphics. Banding is primarily due to a variation in the speed of the paper as it feeds through the MFP especially in the developer and transfer process. Inspect the print cartridge and paper feed components, especially the drive gears, for signs of wear, debris, binds, or damage.
Toner on back of page
FRU Action
Print cartridge Inspect the overall paper path for
Fuser assembly The fuser hot roll can cause toner on
signs of spilled toner. Gently clean the contaminated areas
with a soft cloth or compressed air.
the back of the paper, if toner is building up on the hot roll. This buildup may transfer to the backup roller, later transf erring to the back of the paper.
Inspect the hot roll and backup roller for signs of contamination and replace fuser assembly as necessary.
Transfer roller A transfer roller contaminated with
toner can cause toner to transfer to the back of printed pages.
Inspect the transfer roller for contamination and replace as necessary.
Diagnostic information 2-45
7001–001

RIP card service check

FRU Action
RIP card assembly Check for +24 V dc from the LVPS
card to the RIP card assembly.
Turn the MFP off.
Disconnect the LVPS cable from
the RIP card at J28.
Turn the MFP on.
Verify +24 V dc from the cable, pins 1, 2, and 10.
If voltages are not present or incorrect, see the Low voltage
power supply (LVPS) service check on page 2-24 for more
information.
Note: Always check printhead alignment after replacing the RIP card assembly. See Printhead
alignment adjustment on page 4-2 for hardware alignment
of the printhead. Note: U.S. versus non–U.S. and
the MFP configuration ID can be reset. See Diagnostic mode
menu settings on page 3-6 for
more information.
2-46 Service Manual

Scanner/copier service check

FRU Action
7001–001
CCD FFC (CCD) cable assembly SCU card assembly
1. Open the flatbed cover and restart the MFP.
If the CCD illuminates but does not move, check pins 2 and 5 on CN6 on the SCU card for +24V.
If it passes, replace the flatbed motor.
If it fails, replace the SCU.
If the CCD lamp fails to illuminate, but the CCD moves, check the FFC cable connector on the SCU. Pins 16, 17, 21, and 22 should measure +12V. If it passes, check the cable continuity.
Continuity, replace the CCD . No continuity, replace the
cable.
If the lamp illuminates and the CCD moves, perform the CCD home sensor test. See
Diagnostic mode menu settings on page 3-6 for more
information.
If the test fails, replace the CCD.
Diagnostic information 2-47
7001–001

Transfer roll service check

FRU Action
Transfer assembly roll Transfer Bearing
Check the springs in the left and right transfer roll bearings. The bearing assemblies should support the transfer roll, applying even pressure to the PC drum. The roll should rotate evenly and smoothly.
Replace both the transfer roll bearing assemblies if the springs or bearings indicate damage or lack of proper function.
Inspect the transfer roll for signs of wear or damage and replace as necessary.

USB service check

FRU Action
USB cable 1. Try a different USB cable.
If changing the cable does not fix the problem, proceed with step 2.
2. With the MFP attached to the computer, run the USB view utility.
If the USB view utility indicates that the MFP is attached and communicating with the PC (bMaxPacketSize0>0), there may be a problem with the PC.
If the USB port is faulty, the utility shows the bMaxPac ketSize0 at 0, and the connection status variable shows Device failed enumeration. Replace the RIP card as necessary.
2-48 Service Manual
7001–001

Solving print quality problems

Using print quality test pages

To help isolate print quality problems, like streaking, print test pages using the print quality test pages setting:
1. Enter the special function menu. See Entering the
diagnostics menu on page 3-1 for more information.
2. Scroll to the print tests menu item and press Select.
3. Scroll to the print quality test, and press Select. Three pages print to help you evaluate print quality. The first
page is the print quality test page, the second page is gray, and the third page is black. Once the paper e xits into the output bin, the MFP returns to the print quality test menu item. Exit diagnostics to return to the Ready state.
4. Use the test pages to isolate problems such as print too light, toner streaks, and so on. See the Troubleshooting tables in the User’s Reference for solutions to these problems.
5. To return the MFP online, POR the printer.
Problem Action
Light or blurred characters. The print cartridge may be getting
low on toner:
Remove the print cartridge.
Shake it from side to side to
redistribute the toner.
Reinstall it.
Make sure you are using
recommended print media (see media types and sizes in the User’s Reference.)
Use MarkVision to define the custom type setting for media type, media texture, or media weight.
The print cartridge may be defective. Replace it.
Diagnostic information 2-49
7001–001
Problem Action
Toner smudges appear on the front or back of the page.
Vertical or horizontal streaks appear on the page.
Toner smears or rubs off the page.
Make sure the paper is straight and unwrinkled.
Check for loose toner in the printer.
Clean the printer.
If the problem persists, replace
the cartridge.
Replace the print cartridge.
T ry a different kind of paper . P aper
designed for copiers gives the best quality.
If you are printing on special media, such as, card stock or labels, be sure you select the correct paper type in the MFP driver.
Change the media texture setting. You can download the latest driver from the Lexmark Web site, www.lexmark.com.
The print is getting light but the display is not indicating toner low.
2-50 Service Manual
Remove the print cartridge and gently shake it from side to side to redistribute the toner.
Replace the print cartridge.
Problem Action
7001–001
The display indicates Toner Low attendance message.
Solid black areas on transparencies or paper contains white streaks.
Faint images or repetitive spots appear on the page.
Pages are blank. The print cartridge may be out of
Remove the print cartridge and gently shake it from side to side to redistribute the toner.
Replace the print cartridge.
Choose a different fill pattern in
your software application.
T ry a different type of paper . P aper designed for copiers gives the best quality.
Remove the print cartridge and gently shake it from side to side to redistribute the toner.
Replace the print cartridge.
Select a different media type or
form type setting from your MFP driver.
T ry a different type of paper . P aper designed for copiers gives the best quality.
Replace the print cartridge.
toner or defective. Replace the cartridge.
You may have a software error . Try turning the MFP off and back on.
Check the photoconductor circuit for continuity.
Check the printhead.
The operator panel lights do not come on when the MFP is turned on.
The top cover does not close. Make sure the print cartridge is
The lights may take a f ew seconds to come on.
Make sure the power cord is firmly plugged in at the back of the MFP and at the electrical outlet.
positioned correctly.
Diagnostic information 2-51
7001–001
Problem Action
The MFP is on, but nothing prints. Make sure the print cartridge is
The media skews or buckles. Dont overfill tray 1 or the optional
installed properly.
Make sure the network or USB cable is firmly plugged into the connector on the back of the printer.
POR the machine, enter diagnostic mode and perform a print test to determine whether the problem is with the MFP or the computer.
– If you can print a test
page, the problem is in the computer or the software application.
– If you cannot print a test
page, the problem is in the printer.
If printing from the network, perform the network printing service check.
tray 2 (see media capacities in the media types and sizes table in the User’s Reference).
Make sure the paper guides are flush against the edges of the media.
The paper sticks together/MFP feeds multiple sheets of paper.
The paper fails to feed from tray 1. Remove the paper from tray 1 and
Remove the paper from tray 1 or the optional tray 2 and fan the paper.
Dont overfill tray 1 or the optional tray 2 (see media capacities in the media types and sizes chart in the User’s Reference).
fan the paper.
Make sure tray 1 is selected from the MFP driver.
Do not overfill the tray.
2-52 Service Manual
Problem Action
7001–001
The paper fails to feed from the optional tray 2.
Make sure the optional tray 2 is selected from the MFP driver.
Remove the paper from the optional tray 2 and fan the paper.
Make sure the tray is pushed all the way in.
Make sure the metal plate is pressed down before inserting it into the printer.
Note: Once the tray is inserted, the metal plate springs up so the paper can feed into the printer.
The display indicates Tray 2 even though there is paper loaded in the optional tray 2.
The MFP does not print after a paper jam has been cleared.
Make sure the paper does not exceed the stack height indicator.
Make sure the paper is under both corner bucklers (see loading paper in the User’s Reference).
Make sure the tray is pushed all the way in.
Press Select.
Press Select or open and close
the MFP cover to restart the printer.
Make sure the print cartridge is installed properly.
Diagnostic information 2-53
7001–001
Problem Action
Unexpected characters print or characters are missing.
Make sure you are using the correct MFP driver.
Select hex trace mode to determine what the problem is. See Hex Trace mode on
page 3-13 for more information.
Restore factory defaults. See
Factory defaults on page 3-4
for more information.
Make sure the network cable or USB cable is firmly plugged in at the back of the printer.
2-54 Service Manual
7001–001

3. Diagnostic aids

Menu descriptions

The Configuration Menu contains menus, settings and operations. These menus are used to configure a MFP for operation. This menu is accessed via a POR sequence.
The Diagnostics Menu contains settings and operations used while manufacturing the printer. This menu is accessed via a POR sequence. See Configuration and Diagnostic Menu on
page 3-2 for more information.

Entering the diagnostics menu

1. Press Start, Stop, and Clear buttons and start the MFP.
2. Hold the buttons down until Performing Self Test is displayed on the LCD.
3. Release the buttons, and “Registration” is displayed.

Entering the configuration menu

1. Press Start and Stop buttons and start the MFP.
2. Hold the buttons down until Performing Self Test is displayed on the LCD.
3. Release the buttons, and Configuration Menu is displayed.
Diagnostic aids 3-1
7001–001

Configuration and Diagnostic Menu

When the Configuration Menu is accessed, the following screen is displayed:
Prt Quality Pgs Panel1 Menus PPDS Emulation Factory Defaults Energy Conserve Min Copy Memory
Exit Config Menu
When the diagnostic menu is successfully accessed, the REGISTRATION menu appears as default.
REGISTRATION
3-2 Service Manual
7001–001
Moving around the menus
Configuration menu
To scroll around the configuration menu, use the up and down navigation keys on the operator panel.
To select an item on the menu, scroll to the item, and press the
Select button. Note: A check mark to the left of the menu item indicates it is active.
After a menu item has been selected, use the right and left navigation keys to toggle between selections. To select an item, scroll to the item, and press Select.
To exit the configuration menu, scroll to the bottom until the Exit Configuration Menu box is highlighted with a solid black line. Press
Select. The machine performs a POR. Diagnostic menu
To navigate menu items in the diagnostic menu, use the left and right navigation keys on the operator panel. Press the Select button for the desired menu item. A submenu is presented with more choices. Use the left and right navigation keys to navigate the submenu.
To exit a submenu, press the up navigation key. To exit diagnostics, use the up navigation key to scroll to the top le v el
of the diagnostics menu. Use the right navigation key to scroll to EXIT DIAGNOSTICS. Press Select. The machine performs a POR.
Diagnostic aids 3-3
7001–001

Configuration Menu Settings

The Print Quality Pages menu is used to check print quality. Three test pages are presented for inspecting print quality.
Panel Menus
The Configuration menu is used to change MFP settings. It enables or disables user access to the panel menus. Disab ling Panel Menus keeps users from altering settings via the operator panel. This panel is used by the administrator.
PPDS emulation
The Configuration menu activates and deactivates PPDS emulation.
Factory defaults
Sets the MFP parameters to the factory settings. To restore factory defaults:
1. POR the machine into Configuration Mode. See Entering the
configuration menu on page 3-1 for more information.
2. Use the down navigation button to scroll to the RESTORE FACTORY DEFAULTS item on the menu.
3. Press Select. The machine performs a POR.
4. The RESTORE FACTOR Y DEFAULTS sets the MFP non critical parameters back to the factory settings.
Note: Some settings are not affected: panel language, energy conserve, paper prompts, registration margins, and page count.
3-4 Service Manual
7001–001
Energy conserve
Adjusts the settings on the power saver menu.
Minimum copy memory
Selects the minimum amount of memory to allocate for copy jobs. Note: The memory available is always less than or equal to the
amount of installed memory. Format fax flash Formats flash memory for fax jobs. Paper prompts Sets the source to feed paper for media and sizes not already
assigned to input sources. Note: Choices are: auto, multipurpose feeder, and manual paper.
Auto mode, the source defaults to where the print job is
allocated to. Note: Default media type & size is changed to the specific job
media type & size once prompted to load media.
Multipurpose feeder mode, the user is prompted to load media
in the feeder. Note: Default media type & size is changed to the specific job
media type & size once prompted to load media.
Manual paper mode, the user is prompted to load media in the
feeder.
Diagnostic aids 3-5
7001–001
Envelope prompts
Same as paper prompts, but applies only to envelopes.
Print error log
Printed error log.
Note:
– Debug and secondary 900 error codes are included in the
error log report available in the Diagnostic Mode.
– Debug and secondary 900 error codes are not included in
this error log printout (since the configuration mode may be accessed by an end user).

Diagnostic mode menu settings

Registration
Sets the top, bottom, left and right registration margins for the print engine. The numeric value f or each setting is measured in 1/600th of an inch. The MFP registration process is described in Chapter 4. See Printhead registration adjustment on page 4-4 for more information.
Print tests
Perf ormed to verify the MFP can print from each of the installed print sources. Print Quality pages can also be printed when using this test.
Scanner tests
Includes the following tests and functions: Calibration - Performs a baseline gray scale calibration of the CCD
assembly within the scanner. This function is performed automatically upon exit of Diagnostic Mode at next POR. No insertion of paper is required as the calibration uses a white reference strip inside of the scanner housing.
3-6 Service Manual
7001–001
Registration - Performs scanner margin adjustments for ADF and
flatbed. Registration can be adjusted automatically or manually. Manual mode is somewhat difficult; automatic mode is recommended. Automatic mode finds the top and left edge of paper from a sample scan and calculates right and bottom margins settings. A special sheet of colored paper is required for successful registration of the ADF. This special media is available as a FRU as well as included with FRUs requiring registration adjustment upon replacement. The scanner registration process is described in Chapter 4. See Scanner registration on page 4-5 for more information.
Feed Tests - Verifies the ADF feeds paper and measures the page length for specific paper sizes. This test is also used to scan the entire length of the flatbed.
Note: By indicating paper size, paper length should be within a specific range (which is used for determining paper jams when out of range).
While performing the feed test:
When paper is detected in the ADF, the paper is fed through
the ADF for the ADF portion of the feed test.
When paper is not detected in the ADF, the flatbed CCD
carriage traverses the entire length of the flatbed repeatedly. Pressing Select or Stop cancels the feed test. Note: The number of pages through the flatbed and ADF that
passed or failed is displayed at the end of the test. Sensor test Allows manual inspection of the following sensors:
ADF paper present sensor
ADF paper path sensor
ADF cover open sensor
Flatbed cover open sensor
CCD home position sensor
Diagnostic aids 3-7
7001–001
ASIC test
Checks the scanner ASIC memory.
Hardware Tests
Panel test
Performs a series of LCD and button tests on the operator panel. DRAM test Checks the DRAM memory (both soldered down and optional
DRAM).
Duplex tests
Duplex quick test
Checks that the back side duplex top margin setting is correct. A duplexed version of the quick test page is printed (the back side can be used in adjusting the duplex top margin).
Duplex top margin Allows adjustment of the back side top margin.
Input tray test
Observes the paper path while media is fed through from various input sources.
Notes:
The lower front door can be opened during this test to observe
the paper path.
The upper front door cannot be opened during this test as it
supports the charge roll.
3-8 Service Manual
Loading...