Lexmark E312L, E312 Service Manual

Optra

TM

• Table of Contents

• Start Diagnostics

• Safety and Notices

• Trademarks

E310/E312

4044-XXX

•Index

Lexmark and Lexmark with diamond
design are trademarks of Lexmark
International, Inc., registered in the
United States and/or other countries.

4044-XXX

Edition: July 2000
The following paragraph does not apply to any country where such provisions are

inconsiste nt with local law: LEXMARK INTERNATIONAL, INC. PROV IDES THIS

PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRE SS OR
IMPLIED , INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANT ABILITY 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.

A form for reader’s comments is provided at the back of this publication. If the form has
been removed, comments may be addressed to Lexmark International, Inc., Department
D22A/032-2, 740 West New Circle Road, Lexington, Kentucky 40550, U.S.A. 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.

Lexmark and Optra are trademarks of Lexmark International, Inc., registered in the United
States and/or other countries.

Other trademarks are the property of their respective owners.

© Copyright Lexmark International, Inc. 2000.
All rights reserved.

UNITED STA TES GOVERNMENT RESTRICTED RIGHTS

This software and documentation are provided with RESTRICTED RIGHTS. Use,
duplication or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DF ARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc.,
Lexington, KY 40550.

4044-XXX

Table of Contents

Notices and Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Laser Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Service Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

User Error Message Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Power-On Self Test (POST ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Symptom Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Cooling Fan Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Cover Open Switch Service Check . . . . . . . . . . . . . . . . . . . . . . 2-13

Dead Machine Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Fuser Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Main Motor Service Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Operator Panel Service Check. . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Operator Panel Button Service Check . . . . . . . . . . . . . . . . . . . . 2-24

Paper Feed Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Print Quality Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

Parallel Port Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Memory Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Diagnostic Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Print Quality Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

User Mode Print Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Hex Trace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Restoring Factory Defau lts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Engine Clean Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Toggle Demo/Normal Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Printer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Handling ESD-Sensitive Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

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Removal Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Screw Identification Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Frame Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Fuser Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

HVPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

Interconnect Board (model E310) . . . . . . . . . . . . . . . . . . . . . . . .4-12

Engine/LVPS Board (model E310) . . . . . . . . . . . . . . . . . . . . . . .4-13

Engine/LVPS Board (model E312) . . . . . . . . . . . . . . . . . . . . . . .4-15

Main Drive Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17

Pick Roll Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18

Printhead Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20

Transfer Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21

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

Controller Board (model E310/E312) . . . . . . . . . . . . . . . . . . . . . .5-1

Engine/LVPS Board (model E310) . . . . . . . . . . . . . . . . . . . . . . . .5-4

Engine Board (model E312) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9

LVPS (model E312). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-14

High Voltage Power Supply (model E310) . . . . . . . . . . . . . . . . .5-16

High Voltage Power Supply (model E312) . . . . . . . . . . . . . . . . .5-18

Interconnect Board (model E310) . . . . . . . . . . . . . . . . . . . . . . . .5-21

Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Assembly 1: Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2

Assembly 2: Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6

Assembly 3: Fuser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10

Assembly 4: Main Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-14

Assembly 5: Paper Feed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-16

Assembly 6: Electronics (model E310) . . . . . . . . . . . . . . . . . . . .6-20

Assembly 6: Electronics (model E312) . . . . . . . . . . . . . . . . . . . .6-24

Assembly 7: Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-26

Assembly 8: Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-27

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1

iv Service Manual

4044-XXX

Notices and Safety Information

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 825.

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 wavelength 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.

v

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Laser Advisory Label

vi

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Class 1 Laser Statement Label

vii

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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) 825 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 Normalbe tr ie b, bei der Wartung
durch den Benutzer oder bei ordnungsgemäßer Wartung durch den
Kundendienst Laserbestrahlung, die die Klasse I übersteigen würde,
Menschen keinesfalls erreicht.

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 825 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 d’une puissance nominale de 5
milliwatts) émettant sur des longueurs d’onde comprises entre 770
et 795 nanomètres. L’imprimante et son système laser sont conçus
pour impossible, dans des conditions normales d’utilisation,
d’entretien par l’utilisateur ou de révision, l’exposition à des
rayonnements laser supérieurs à des ra yonnements de Classe I .

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4044-XXX

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 825.

I prodotti laser di classe non sono considerati pericolosi. La

stampante contiene al suo interno un laser di classe IIIb (3b)

all’arseniuro di gallio della potenza di 5mW che opera sulla

lunghezza d’onda 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..

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 825 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 radiac ión láser superior al nivel de

la Clase I durante su uso normal, el mantenimiento realizado por el

usuario o cualquier otra situación de servicio técnico.

ix

4044-XXX

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 825.

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.

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 825.

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.

x

4044-XXX

Lasermeddelelse

Printeren er godkendt som et Klasse I-laserprodukt, i

overenstemmelse med kravene i IEC 825.

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 servi c ebet ing el se r.

Huomautus laserlaitteesta

Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS

21 CFR Subchapter J -määrityksen mukainen ja muualla luokan I

laserlaitteiden IEC 825 -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.

xi

4044-XXX

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 825.

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 770­795 nanometer. Lasersystemet och skrivaren är utformade 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.

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

825.
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 ov er klasse I-nivå under
vanlig bruk, vedlikehold som utføres av brukeren, eller foreskrevne
serviceoperasjoner.

xii

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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 d’IEC 825.

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 nanòmet re s. El siste ma làser i la impressora han sigut

concebuts de manera que mai hi hagi exposició a la radiació làser

per sobre d’un nivell de classe I durant una operació normal, durant

les tasques de manteniment d’usuari ni durant els serveis que

satisfacin les condicions prescrites.

xiii

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Japanese Laser Notice

Chinese Laser Notice

xiv

4044-XXX

Kore an Laser Notice

Safety Inf ormation

• This product is designed, tested and approved to meet strict

global safety standards with the use of specific Lexmark
components. The safety features of some parts may not
always be obvious. Lexmark is not responsible for the use of
other 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.

xv

4044-XXX

Consignes de Sécurité

• Ce produit a été conçu, testé et approuvé pour respecter les

normes strictes de sécurité globale lors de l'utilisation de
composants Lexmark spécifiques. Les caractéristiques de
sécurité de certains éléments ne sont pas toujours évidentes.
Lexmark ne peut être tenu responsable de l'utilisation
d'autres pièces de rechange.

• 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

certai ns risques électriques, le personnel d'entretien qualifié
devra prendre toutes les précautions nécessaires.

Norme di sicurezza

• Il prodotto è stato progettato, testato e approvato in

conformità a severi standard di sicurezza e per l’utilizzo con
componenti Lexmark specifici. Le caratteristiche di sicurezza
di alcune parti non sempre sono di immediata comprensione.
Lexmark non è responsabile per l’utilizzo di parti di ricambio
di altri produttori.

xvi

• 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.

4044-XXX

Sicherheitshinweise

• Dieses Produkt und die zugehörigen Komponenten wurden

entworfen und getestet, um beim Einsatz die weltweit
gültigen Sicherheitsanforderungen zu erfüll en. Die
sicherheitsrelevanten Funktionen der Bauteile und Optionen
sind nicht immer offensichtlich. Sofern Teile eingesetzt
werden, die nicht von Lexmark sind, wird von Lexmark
keinerlei Verantwortung oder Haftung für dieses Produkt
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.

Pautas de Seguridad

• Este producto se ha diseñado, verificado y aprobado para

cumplir los más estrictos estándares de seguridad global
usando los componentes específicos de Lexmark. Puede
que las características de seguridad de algunas piezas no
sean siempre evidentes. Lexmark no se hace responsable
del uso de otras piezas de recambio.

• 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.

xvii

4044-XXX

Informações de Segurança

• Este produto foi concebido, testado e aprovado para

satisfazer os padrões globais de segurança na utilização de
componentes específicos da Lexmark. As funções de
segurança de alguns dos componentes podem não ser
sempre óbvias. A Lexmark não é responsável pela u til iz ação
de outros componentes de substituição.

• As informações de segurança relativas a este produto

destinam-se a profissionais destes serviços e não dev em 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.

Informació de Seguretat

• Aquest producte està dissenyat, comprovat i aprovat per tal

d'acomplir les estrictes normes de seguretat globals amb la
utililització de components específics de Lexmark. Les
característiques de seguretat d'algunes peces pot ser que no
sempre siguin òbvies. Lexmark no es responsabilitza de l'us
d'altres peces de recanvi.

xviii

• La informació pel manteniment d’aquest 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 d’aquest
producte. El personal professional ha d’estar-ne assabentat i
prendre les mesures convenients.

4044-XXX

Chinese Safety Information

Korean Safety Information

xix

4044-XXX

xx

4044-XXX

1. General Information

This printer is a letter-quality laser page printer designed to attach to

an IBM Personal Computer or other computers compatible with the

IBM Personal Computer (with 386 processor or higher) and

Macintosh Computers via the USB connection.

Product
Name

MT/Model 4044-001 4044-201 4044-2L1 4044-2L2
Speed 8 pages

Base
Memory

Emulations PSLII,

Connectivity Parallel/

Resolution True 600dpi/Image Quality 1200dpi
Starter

Toner
Cartridge

Optra
E310

per minute
2MB 4MB 4MB 2MB

PCL6,
PPDS

USB

6k pages 6k pages 1.5k pages 1.5k pages

Optra
E312

10 pages
per minute

PSLII,
PCL6,
PPDS

Parallel/
USB

Optra
E312L

10 pages
per minute

PSLII,
PCL6,
PPDS

Parallel/
USB

Optra
E312L

10 pages
per minute

PSLII,
PCL6,
PPDS

Parallel/
USB

Options

The following options are available. Some options are not available

in every country. Contact y our point of purchase for options available

in your country.

Memory options of 8MB, 16MB, 32MB and 64MB
Flash memory options of 1MB, 2MB and 4MB

General Information 1-1

4044-XXX

Acronyms

CSU Customer Setup
DRAM Dynamic Random Access Memory
EP Electrophotographic Process
EPROM Erasable, Programmable Read-Only

Memory
ESD Electrostatic Discharge
FRU Field Replaceable Unit
HVPS High Voltage Power Supply
LASER Light Amplification by Stimulated Emission

of Radiation
LCD Liquid Crystal Display
LED Light-Emitting Diode
LV PS Low Voltage Power Supply
MROM Masked Read Only Memory
NVRAM Nonvolatile Random Access Memory
OEM Original Equipment Manufacturer
PC Photoconductor
POST Power-On Self Test
ROM Read Only Memory
SIMM Single In-Line Memory Module
SRAM Static Random Access Memory
UPR Used Parts Return
USB Universal Serial Bus
V ac Volts alternating current
V dc Volts direct current

1-2 Service Manual

4044-XXX

2. Diagnostic Information

Start

CAUTION: NEVER manually actuate or disable the top cover
interlock switch and the printhead shutter actuator at the same
time. To perform some of the service checks and tests, such as

troubleshooting paper feed problems, you need to actuate the top
cover interlock switch with the covers opened or removed and power
applied to the machine. It is important for personal safety that you
DO NOT, FOR ANY REASON, disable the printhead shutter actuator
when power is on.

Remove power from the printer before you connect or disconnect
any cable or electronic board or assembly for personal safety and to
prevent damage to the printer.

Use the service error code, user error message, symptom table,
service checks, and diagnostic aids in this chapter to determine the
corrective action necessary to repair a malfunctioning printer.

The lights on the operator panel can indicate either a user error
message or service error message. When a service error occurs,
the printer stops printing and all operator panel LEDs blink in a
continuous pattern, indicating a service error, until the printer is
powered off. If all operator panel LEDs are blinking, go to the

Error Codes” on page 2-2

When a user error message occurs, one or two operator panel LEDs
are on solid or blinking. Go to the

page 2-6

If your machine does not have a service error code and does not
complete POST, go to the “POST Symptom Table” on page 2-10. If your
machine completes POST without an error, and you have a
symptom, go to the
your symptom and take the appropriate action.

If a service error code appears while you are working on the
machine, go to the “Service Error Codes” on page 2-2 and take the
indicated action for that error.

.

.

“User Error Message Table” on

“Base Printer Symptom Table” on page 2-10. Locate

Diagnostic Information 2-1

“Service

4044-XXX

Service Error Codes

Primary Service Error Codes

When a service error occurs the printer stops printing and all
operator panel LEDs blink in a continuous pattern, indicating a
service error, until the printer is powered off.

Press and release the operator panel button to display the service
error code. Locate the blinking LEDs in the following table and
the indicated action

Blinking Operator Panel LED Action

Software Service Error Code Run the Printer Diagnostic Test to

.

diagnose between the R O M SIMM
and the controller board. If no other
error code displays after the test
completes, replace the controller
board.

take

Fuser Failure Error Press and release the operator

Laser Diode Failure Inspect the printhead cable and

panel button to view the secondary
service error code. Go to

“Secondary Service Error Codes” on
page 2-5.

replace as necessary. Replace the
printhead assembly. If this does not
correct t he problem, replace the
engine/LVPS board.

2-2 Service Manual

4044-XXX

Blinking Operator Panel LED Action

Mirror Motor Failure Inspect the printhead cable and

Optional Memory Error Replace the op tional m emory SIMM.

ROM Checksum Error Replace the ROM SIMM. If this does

Base Memory Error Replace the controller board

replace as necessary. Replace the
printhead assembly. If this does not
correct the problem, replace the
engine/LVPS board.

If this does not correct the problem,
replace the controller board.

not correct the problem, replace the
controller board.

NVRAM Failure Error Replace the controller board

Diagnostic Information 2-3

4044-XXX

Blinking Operator Panel LED Action

ASIC Register Failure Error Replace the controller board

ASIC SRAM Failure Error Replace the controller board

Flash Memory Failure Error Replace the ROM SIMM w/Flash. If

Font Checksum Fai lure Error Replace the ROM SIMM. If this does

Engine/LVPS Board
Communications Failure Error

this does not correct the problem,
replace the controller board.

not correct the problem, replace the
controller board.

Replace the engine/LVPS board

2-4 Service Manual

4044-XXX

Secondary Service Error Codes

For some service error codes, a second service error code is used
to further describe the error. When a service error occurs, pressing
the operator panel button after viewing the primary service error
code displays the secondary service error code. The following table
contains the secondary service error codes.

Blinking Operator Panel LED Action

Fuser Failure - Over Temperature Go to the “Hot Fuser Service Check”

Fuser Failure - Under
Temperature

Fuser Failure - Thermistor Open Go to the “Fuser Service Check” on

on page 2-21.

Go to the “Cold Fuser Service

Check” on page 2-17.

page 2-17.

Diagnostic Information 2-5

4044-XXX

User Error Messag e Table

Primary User Error Message Table

When a user error message occurs the printer stops printing and
one or two operator panel LEDs are on solid or blinking until the
printer is powered off. Locate the printer’s LED Status in the
following table and take the indicated action.

User Error Message LED Status Action

Paper Jam Paper Jam on solid Open cover and clear

Load Manual Paper/
Envelope

Load Paper/Load
Envelope

Load Paper b links and
Press Button on solid

Load Paper on solid
and Press Button on
solid

any paper jams . Close
the top cover. If the
error message is still
present, go to
the“Paper Feed

Service Check” on
page 2-24.

Load media into the
manual slot and push
the operator panel
button to resume
printing one sheet or
do an operator panel
reset by pressing and
holding the operator
panel button for more
than three seconds.

Load media in the
appropriate paper tra y
and push the operat or
panel button to
resume printing or do
an operato r panel
reset by pressing and
holding the operator
panel button for more
than three seconds.

Top Cover Open Error on solid Close the top cover. If

the error LED remains
on solid and POST
does not continue, go
to the “Cover Open

Switch Service
Check” on page2-13.

2-6 Service Manual

4044-XXX

User Error Message LED Status Action

Memory Full/Complex
Page/Resolution
Reduction Warning/
Font Error/ Resource
Save Off Deficient
Memory

Flash Memory Full Error blinks and Press

Error on solid and
Press Button on solid

Button on solid

The printer memory is
full or the page is too
complex to print. The
printer is forced to
reduce the resolution
of a formatted page to
300 dpi before
printing, or the printer
is unable to maintain
the required data
transfer rate. Go to the

“Secondary User
Error Message Table”
on page 2-8.

This condition only
occurs when the
Flash memory is full.

Diagnostic Information 2-7

4044-XXX

Secondary User Error Message Table

Press and release the operator panel button two times to display the
user secondary error LED status. Each press and release action
must be performed within a half second. Locate the printer’s LED
status in the following table and take the indicated action.

User Error Message LED Status Action

Complex Page Ready, Error, and

Press Button on solid

Memory Full Ready, Data, Error,

and Press Button on
solid

Resolution Reducti on Ready, Data blinking

and the Error, Press
Button on solid

Switch the printing
mode to a different
printing mode using
the Lexmark driver f or
Windows, or push the
operator panel button
to resume printing, or
do an operator panel
reset by pressing and
holding the operator
panel button for more
than three seconds.

Change the printing
mode to Quick P rint
Plus or reduce the
complexity of the job
or the resolution, or
push the operator
panel button to
resume printing, or do
an operato r panel
reset by pressing and
holding the operator
panel button for more
than three seconds.

Switch from the GL/2
or raster mode to
Quick Print Plus m ode
using the Lexmark
driver for Wind o ws, or
press the operator
panel button to
resume printing, or do
an operato r panel
reset by pressing and
holding the operator
button for more than
three seconds.

2-8 Service Manual

4044-XXX

User Error Message LED Status Action

Font Error Data blinking and

Resource Save Off
Deficient Memory

Error, Pre ss Button on
solid

Ready blinking and
Error, Pre ss Button on
solid

The print command is
requesting a font that
is not present or
installed. The user
must select a di ff erent
font or try turning the
Best Fit setting on and
retry the print
command.

The printer lacks
sufficient memory to
enable Resource
Save. It is
recommended that
the user install
additional memory or
set each link buffer to
the Auto va lue.

Power-On Self Test (POST)

When you turn the printer On, it performs a Power-On Self Test.
Check for correct POST functioning of the base printer by observing
the following:

1. All LEDs turn on solid.

2. All LEDs turn off.

3. The cooling fan and fuser lamp turn on.
Note: The fuser lamp turns off once the thermistor reaches

operating temperature. As the temperature drops, the lamp
turns back on automatically.

4. The LEDs begin to turn on then off sequentially.

5. Once the fuser has reached operating temperature, the main
motor turns on and the pick roller shaft assembly rotates to
home position.

6. The Ready LED turns on solid while the Data LED blinks.

7. The engine/LVPS board checks the status of the input and exit
paper feed sensors.

8. The main motor turns off.

9. The Data LED turns off.

Diagnostic Information 2-9

4044-XXX

Symptom Ta bles

POST Symptom Table

Symptom Action

The main motor, cooling fan and
fuser do not come on.

POST completes except one or
more LEDs do not come on.

None of the LEDs come on. Go to the “Operator Panel Service

Main motor does not come on. Go to the “Main Motor Service

Fan does not come on. Go to the “Cooling Fan Ser v ice

Fuser lamp does not come on. Go to the “Cold Fuser Service

Fuser lamp never turns off. Go to the “Hot Fuser Service Check”

The paper feed picks and tries to
feed paper.

Go to “Cover Open Switch Service

Check” on page 2-13.

Go to the“Operator Panel Service

Check” on page 2-23.

Check” on page 2-23.

Check” on page 2-21.

Check” on page 2-12.

Check” on page 2-17.

on page 2-21.

Go to the “Paper Feed Service

Check” on page 2-24.

Base Printer Symptom Table

Symptom Action

Dead Machine (no power) Go to the “Dead Machine Service

Fan noisy or not working Go to the “Cooling Fan Servi ce

Fuser parts melted Go to the “Hot Fuser Service Check”

Fuser lamp doesn’t light Go to “Cold Fuser Service Check” on

Toner not fused to the paper Go to “Cold Fuser Service Check” on

Check” on page 2-14.

Check” on page 2-12.

on page 2-21.

page 2-17.

page 2-17.

2-10 Service Manual

4044-XXX

Symptom Action

Blank page Go to “Blank page” on page 2-28.
Black page Go to “Black page” on page 2-29.
Heavy background Go to “Heavy background” on

page 2-30.

Light pri nt Go to “Light print” on page 2-33.
White or black lines or bands Go to “White or black lines or bands”

on page 2-34.

Toner on back of page Go to “Toner on back of page” on

Incorrect characters print Go to “Incorrect characters print” on

Pap er jams Go to “Paper Feed Service Check”

Main Motor noisy or does not
move

Paper never picks Go to “Paper never picks” on

Paper feeds continuously Go to “Paper picks during POST

Pap er skew Go to “Paper Feed Service Check”

Printer not communicating with
host

Paper wrinkled or bent Go to “Paper "trees", wrinkles,

Top cover will not close Go to “Cover Open Switch Service

page 2-34.

page 2-34.

on page 2-24.

Go to “Main Motor Service Check”

on page 2-21.

page 2-27.

and/or continuously” on page 2-25.

on page 2-24.

Go to “Parallel Port Service Check”

on page 2-35.

stacks poorly or curls” on page 2-28.

Check” on page 2-13.

Operator panel button does not
respond

Operator panel LEDs do not light
or very dim

Go to “Operator Panel Button

Service Check” on page 2-24.

Go to “Operator Panel Service

Check” on page 2-23.

Diagnostic Information 2-11

4044-XXX

Service Checks

Note: All service checks which involve measuring voltages of the

circuit boards (except the controller board) must be performed with
the engine/LVPS to controller board cable disconnected and the
printer positioned on its left side. This provides the servicer access
to the various circuit boards underneath the printer while supplying
necessary power to the rest of the printer.

Cooling Fan Service Check

FRU Action

Model E310
Interconnect Board
Cooling Fan

FRU Action

Model E312
Engine Board
Cooling Fan

Make sure moto r cable is properly
seated in location CN408 on the
interconnect board. Disconnect the
cable and check connector-pin
CN408-3 for +24 V dc. If the voltage
is not present, replace the
interconnect board. If the voltage is
present, replace the cooling fan.

Make sure moto r cable is properly
seated in location C N3 on the engine
board. Disconnect the cable and
check connector-pin CN3-1 for +24
V dc. If the voltage is not present,
replace the engine board. If the
voltage is present, replace the
cooling fan.

2-12 Service Manual

4044-XXX

Cover Open Switch Service Check

Note: Make sure a toner cartridge is installed and the cover closes
all the way, engaging the cover open switch lever. The lever can
easily be positioned incorrectly if the top cover has been removed
and replaced.

FRU Action

Models E310 & E312
Cover Open Switch

Model E310
HVPS
Engine/LVPS Board

Make sure the cover open switch

cable is properly seated in CN2 of

the HVPS. Disconnec t the cabl e and

check the switch for continuity. Push

the cover open switch lever down to

engage the switch and close the

circuit. If the circuit does not close,

replace the switch.

Measure the volta ge at CN2-3 of the

HVPS. It measures +24 V dc. If

voltage is present at CN2-3, check

for continuity between CN2-1 and

CN1-2. If continuity does not exist,

replace the HVPS. If continuity does

exist, check the HVPS to engine/

LVPS board cable for continuity.

Replace if defective. If voltage is not

present at CN2-3, chec k the voltage

at CN1-1. It measures +24 V dc. If it

does, replace the HVPS. If it does

not, check the voltage at CN2-2 of

the engine/LVPS board. It measures

+24 V dc. If it does, replace the

HVPS to engine/LVPS board cable.

Diagnostic Information 2-13

4044-XXX

FRU Action

Model E312
HVPS

Model E312
HVPS to Engine Board Cable

E312
Engine Board

Measure the voltages at CN2 of the
HVPS. CN2-3 measures +5 V dc
and CN2-4 measures +24 V dc. If
the correct voltage is present, check
the continuity between the following
connector locations:

CN2-3 - CN1-17
CN2-3 - CN1-19
CN2-4 - CN1-2
CN2-4 - CN1-4

If any location does not measure
continuity, replace th e HVPS.

Replace the cable if it does not
measure continuity.

Go to the “Engine Board (model
E312)” on page -9. Measure the

voltages on CN11. If an y voltages
are incorrect, replace the engine
board.

Dead Machine Service Check

Note: Check the AC line voltage. The voltage should be within the
following limits:

100 V ac - 127 V ac for the low voltage model printer
200 V ac - 240 V ac for the high voltage model printer

FRU Action

Model E310 & E312
LVPS Fuse

Check the fuse on the LVPS for
continuity. Replace with the
appropriate fuse if blown. If a fuse
blows again after being rep laced,
install a new fuse and go to “Engine/

LVPS Board (model E310)” on
page 5-4 and check the engine/

LVPS board output.

2-14 Service Manual

4044-XXX

FRU Action

Model E310
Engine/LVPS Board
Power Switch

Model E310
LVPS to Interconnect Board
Cable

Model E310
Interconnect Board

Disconnect the ca bles from C N2 and

CN5 and leav e the cab les conn ected

to the power switch attached. With

the prin ter position ed on its left side

and the engine/LVPS board

positioned on a flat surface, turn the

power switch on and check the AC

line voltage at connector CN201. If

no voltage is present, replace the

power switch. If line voltage is

present, measure the voltages at

connectors CN2 and CN5. Go to

the“Engine/LVPS Board (model

E310)” on page 5-4 and check for

correct voltage measurements.

Replace the engine/LVPS board if

any of the voltage measurements

are incorrect.

Check the continuity of the LVPS to

interconnect board cable. Replace

the cable if it does not measure

continuity.

Reconnect the LVPS to the

interconnect board cable. Go to

“Interconnect Board (model E310)”

on page 5-21 and measure voltages

on the following connectors on the

interconnect board:

Model E312
Power Switch

CN401/CN402/CN403/CN404/

CN405/CN407/CN408

If any of the measured voltages are

incorrect, replace the interconnect

board.

Place the printer on its rear side.

Position the LVPS board on a flat

surface with all the cables

connected. Turn the printer power

switch to the on position. Check the

AC line voltage at power switch

connector CN501. If no voltage is

present, replace the pow er switch

Diagnostic Information 2-15

4044-XXX

FRU Action

Model E312
LVPS Board

Model E312
Engine Board

Disconnect the LVPS cable from
connector CN7 on the en gine bo ard.

Go to the “LVPS (model E312)” on
page -14. Check the voltage

measurements at co nne ctor C N503.
If any voltage measurements are
incorrect, replace the LVPS.

Reconnect the LVPS cable to
connector CN7 on the en gine bo ard.
Disconnect all other cables from the
engine board. Go to the “Engine

Board (model E312)” on page -9.

Check the voltage measurements at
each connector. If any voltages are
incorrect, replace the engine board.
If all voltages are correct, reconnect
all the cables to the engine board
one at a time. Check the voltage
meausrements on the engine board
each time you connect a cable. If a
voltage measurement is incorrect
after connecting one of the cables,
replace the FRU that you connected.

2-16 Service Manual

4044-XXX

Fuser Servic e Check

Cold Fuser Service Check

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

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 printer must be within the following limits:
100 V ac - 127 V ac for the low voltage model printer
200 V ac - 240 V ac for the high voltage model printer
Turn the printer off and wait a few minutes for the fuser lamp to cool.

Turn the machine on and observe the lamp turning on during POST .
You can see the lamp with the left side cover and fuser wire cover
removed.

Diagnostic Information 2-17

4044-XXX

The fuser lamp does light

FRU Action

Model 310
Thermistor

Model 312
Thermistor

If the fuser lamp comes on and a
fuser failure LED error code displ ays,
be sure the thermistor is contacting
the hot roll and the thermistor cable
is firmly seated in c on nec tor C N1 on
the L VPS board. Check fo r excessiv e
toner buildup on the surface of the
thermistor. Clean or replace as
necessary. Turn the printer off and
disconnect the t hermistor c ab le fro m
CN1 on the LVPS board. Measure
the resistance of the thermistor
between CN1-1 and CN1-2. The
resistance measures approximately
225K ohms when cool. Replace the
thermistor as necessary.

If the fuser lamp comes on and a
fuser failure LED error code displ ays,
be sure the thermistor is contacting
the hot roll and the thermistor cable
is firmly seated in connector CN10
on the engine board. Check for
excessive toner buildup on the
surface of the thermistor. Clean or
replace as necessary. Turn the
printer off and disconnect the
thermistor cable from CN10 on the
engine board. Measure the
resistance of the thermistor betw een
CN10-1 and CN10-3. Th e resistance
measures appro ximatel y 225K ohm s
when cool. Replace the thermistor
as necessary.

Models E310 & E312
Fuser Lamp

2-18 Service Manual

Make sure the correct vo lta ge lam p
is installed. The voltage rating is
stamped on one of the lamp
contacts.

4044-XXX

The fuser lamp does not light

FRU Action

Model E310
Fuser Lamp
Lamp Cable
Thermistor
LVPS

Tur n the printer off and disconnect

the fuser lamp wires from the fuser.

Check for continuity across the fuser

lamp wire contacts. If there is

continuity, go to step 1: Continuity.

If there is no continuity, go to

step 2: No Continuity.

Step 1: Continuity

Measure the voltage at connector

CN202 on the LVPS. It should match

the line voltage. If it does not,

replace the LVPS. If line voltage is

present, check the fuser lamp cable

for continuity. Replace if

defective.Make sure the fuser

thermistor is correctly connected to

CN1 on the LVPS. If the problem

persists, disconnect the thermistor

cable from CN1 on the LVPS board

and measure the vol tag e between

CN1-1 and ground. The voltage

measures approximately 3.9 V dc. If

the voltage is incorrect, replace the

LVPS. If correct, replace the

thermistor.

Step 2: No Continuity

Check the thermal fuse f or contin uity .

If incorrect, replac e the t hermal fuse .

If correct, replace the lamp.

Diagnostic Information 2-19

4044-XXX

FRU Action

Model E312
Fuser Lamp
Lamp Cable
Thermistor
LVPS

Turn the printer off and disconnect
the fuser lamp wires from the fuser.
Check fo r contin uity acros s the fuse r
lamp wire contacts. If there is
continuity, go to step 1: Continuity.
If there is no continuity, go to
step 2: No Continuity.

Step 1: Continuity
Measure the voltage at connector

CN502 on the LVPS. It should match
the line voltage. If it does not,
replace the LVPS. If line voltage is
present, check the fuser lamp cable
for continuity. Replace if
defective.Make sure the fuser
thermistor is correctly connected to
CN10 on the engine board. If the
problem persists, disconnect the
thermistor cable from CN1o on the
engine board and measure the
voltage between CN10-1 and
ground. The voltage measures
approximately 3.9 V dc. If the voltag e
is incorrect, replace the engine
board. If correct, replace the
thermistor.

Step 2: No Continuity

2-20 Service Manual

Check the thermal fuse f or contin uity .
If incorrect, replace the thermal f use.
If correct, replace the lamp.

4044-XXX

Hot Fuser Service Check

FRU Action

Model E310
Fuser Thermistor

Model E312
Fuser Thermistor

Models E310 & E312
Fuser Lamp

Disconnect the the rmistor cable from

the LVPS. Measure the resistance

across CN1-1 and CN1-2 of the

thermistor cable. Replace the

thermistor if the resistance is low er

than 1k ohm or shorted.

Disconnect the the rmistor cable from

the engine board. Measure the

resistance across CN10-1 and

CN10-3 of the thermistor cable.

Replace the thermistor if the

resistance is lower than 1k ohm or

shorted.

Make sure the correct voltage fuser

lamp is insta lled. Replace if

necessary.

Main Motor Service Che ck

FRU Action

Model E310
Interconnect Board
Main Motor
Main Motor Cable

Check the in terconnec t board f or the

following voltages:

CN405-3 +24 V dc

CN405-4 +24 V dc

If these voltages are not correct,

replace the interconnect board. If

these voltag es are correct, check the

main motor cable for continuity. If

continuity exists on each wire,

replace the main motor. If continuity

does not exist on one or more of the

wires, replace the cable.

Diagnostic Information 2-21

4044-XXX

FRU Action

Model E312
Engine Board
Main Motor
Main Motor Cable

Check the engine board for the
following voltages:

CN2-3 +24 V dc
CN2-4 +24 V dc

If these voltages are not correct,
replace the engine board. If these
voltages are co rrec t, ch eck the main
motor cable for continuity. If
continuity exists on each wire,
replace the main motor. If continuity
does not exist on one or more of the
wires, replace the cable.

2-22 Service Manual

4044-XXX

Operator Panel Service Check

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

Run POST and check each LED for proper operation.

FRU Action

Models E310 & E312
Operator Panel
Operator Panel Cable

Models E310 & E312
Operator Panel
Operator Panel Cable
Controller Board

If more than one LED does not turn

on or an individual LED stays on

solid during POST, check the

operator panel cable for continuity.

Replace if defective. If the cable

measures continuity, replace the

operator panel.

If all LEDs are dim and operate

erratically during POST or all LEDs

come on and stay on solid during

POST, replace the following FRUs

one at a time in the order shown:

Controller Board

Operator Panel

Operator Panel Cable

If none of the LEDs come on, make

sure the cable is properly connected

to the operator panel and the

controller board. Disconnect the

cable and check it for continuity.

Replace if necessary. If the cable

measures continuity, measure the

followi ng v oltag es wit h the printer on

at idle:

U5-1: Ground

U5-2: +5 V dc

U5-3: +5 V dc

U5-5: +5 V dc

U5-6: Ground

If these voltages are not correct,

replace the controll er bo ard. If thes e

voltages are correct, replace the

operator panel.

Diagnostic Information 2-23

4044-XXX

Operator Panel Button Service Check

FRU Action

Models E310 & E312
Operator Panel
Operator Panel Cable

Disconnect the operator panel from
the operator panel cabl e . Check the
continuity between U5-1 and U5-2
on the operator panel as you press
the operator panel button. As the
button is pressed, continuity is
present. Replace the operator panel
if continuity is not present. If
continuity is present, replace the
operator panel cabl e .

Paper Feed Service Check

Paper Jam error indication during POST

FRU Action

Models E310 & E312
Exit Sensor Flag

Models E310 & E312
Input Paper Feed Sensor

If the exit sensor flag is not resting
within the paper exit sensor during
POST, the printer displays a paper
jam message. M ake sure the flag is
operating freely and correctly
installed.

Make sure the input paperfeed
sensor is working properly. A stuck
or incorrectly installed sensor
causes this error.

2-24 Service Manual

4044-XXX

Paper picks during POST and/or continuously

FRU Action

Models E310 & E312
Pick Roller Clutch
Solenoid

Check the pick roller clutch for wear.

The solenoid interac ts with the

clutch controlling motion of the pick

roller. If the cam surface of the pick

roller clutch assembly is worn, the

solenoid ma y not sto p the pick roller

from rotating. Repla ce the pick roller

clutch 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.

Paper picks but stops about an inch down the page

FRU Action

Models E310 & E312
Roller Guides

Check for correct position of roller

guides on pick roller assembly.

Paper picks but stops half way through the printer

FRU Action

Model E310
Input Paper Feed Sensor
Interconnect Board

Make sure the input paper feed

sensor is working properly. Check for

a broken or stuck flag on the input

paper feed sensor. Check to make

sure the cable is seated on the

CN401 connector on the

interconnect board. Disconnect the

cable and check for the following

voltages:

CN401-3 +5 V dc

CN401-4 Ground

If these voltages are not correct,

replace the interconnect board. If

correct, replace the in put paper feed

sensor.

Diagnostic Information 2-25

4044-XXX

FRU Action

Model E312
Input Paper Feed Sensor
Engine Board

Make sure the input paper feed
sensor is working properly. Check for
a broken or stuck flag on the input
paper feed sensor. Check to make
sure the cable is seated on the CN6
connector on the engine board.
Disconnect the cable and check for
the following v oltages:

CN6-3 +5 V dc
CN6-4 Ground

If these voltages are not correct,
replace the engine board. If correct,
replace the input paper feed sensor.

2-26 Service Manual

4044-XXX

Paper never picks

FRU Action

Models E310 & E312
Pap er Tray

Model E310
Pick Roller Solenoid

Model E312
Pick Roller Solenoid

Make sure the p ape r t ray is correc tly

installed. The black mylar guide

sheet in the front of the tray must be

positioned in the paper path just

behind the pick rol ler a ss em bly. This

guide sheet can easily block the

paper path if installed incorrectly.

Make sure solenoid is installed

correctly and its cab le is plugged into

CN402 on the interconnect board. If

installation is correc t, disco nnect the

solenoid and check CN402-1 for

+24 V dc. If the voltage is present,

replace the solenoid. If the vo ltage is

not present, replac e the interco nnect

board.

Make sure solenoid is installed

correctly and its cab le is plugged into

CN4 on the engine board. If

installation is correc t, disco nnect the

solenoid and check CN4-1 for

+24 V dc. If the voltage is present,

replace the solenoid. If the vo ltage is

not present , replace the engine

board.

Paper occasionally picks or picks multiple sheets at once

FRU Action

Models E310 & E312
Pick Roller Assembly

Models E310 & E312
Paper Separator Assembly

Models E310 & E312
Pick Roller Pad Assembly

Check pick roller assembly for wear.

Replace as necessary.

Check the friction pad on the paper

separator for signs of wear. Replace

as necessary.

Check the friction pad on the pick

roller pad assembly for signs of

wear. Replace as necessary.

Diagnostic Information 2-27

4044-XXX

Paper "trees", wrinkles, stacks poorly or curls

FRU Action

Models E310 & E312
Transfer Roller

This problem is most likely due to a
worn transfer roller. A worn transfer
roller causes the printer to run h otter
than required for the media being
printed. Excessive heat can cause
paper treeing problems, poor
stacking or curl.

Print Quality Service Check

Blank page

FRU Action

Models E310 & E312
Toner Car tridge

Printhead
Printhead Cable
HVPS
Engine/LVPS Board (Model E310)
Engine Board (Model E312)

Remove the toner cartridge and
gently shake the assembly to evenly
distribute the toner.

Blank pages can be caused by a
defective printhead assembly, high
voltage power supply or engine/
LVPS board. Disconnect the
printhead cable from the HVPS and
measure the signals on connectors
CN3 and CN4. Go to the “High

V oltage P ower Su pply (model E310 )”
on page 5-16 in the connector

locations chapter and check the
voltage measurements. 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. If the voltage measurements
are not correct, replace the HVPS. If
the problem still exists, replace the
engine/LVPS board on the model
E310 or the engine board on the
model E312.

2-28 Service Manual

4044-XXX

Black page

Note: Incorrect laser exposure or incorrect charging of the

photoconductor causes an all black page.

FRU Action

Models E310 & E312
HVPS Contacts

Model E310
Engine/LVPS Board
HVPS Cable
HVPS

Model E312
Engine Board
HVPS Cable
HVPS

Check the contacts for

contamination and correct

installation. Replace as necessary.

Make sure the HVPS to engine/

LVPS cable is correctly installed.

Disconnect the cable and measure

the signals on CN2 of the engine/

LVPS board. Go to “Engine/LVPS

Board (model E310)” on page 5-4

and check the voltage

measurements. If the voltages are

not correct, replace t he engine/LVPS

board. If the voltages are correct,

check the HVPS to engine/LVPS

cable f o r co nti n ui ty. If the cable does

not measure continuity, replace the

cable. If the cable measures

continuity, replace the HVPS.

Make sure the HVPS to engine

board cable is correctly installed.

Disconnect the cable and measure

the signals on CN11 of the engine

board. Go to the “Engine Board

(model E312)” on page-9. Check

the voltage measurements. If the

voltages are not cor rect, replace the

engine board. If the voltages are

correct, check the HVPS to engine

board cable for continuity. If the

cable does not measure continuity,

replace the cable. If the cable

measures continuity, replace the

HVPS.

Diagnostic Information 2-29

4044-XXX

Heavy background

Poor dev elopment or poorly charged toner particles cause excessive
background. This is more noticeable as the toner cartridge nears
end of life.

FRU Action

Models E310 & E12
Toner Car tridge

Model E310
HVPS Contacts
HVPS Board
Engine/LVPS Board

Model E312
HVPS Contacts
HVPS Board
Engine Board

Make sure toner cartridge is
correctly installed and the high
voltage contacts are clean. If the
cartridge is installed correctly, try a
new cartridge.

Check the contacts for correct
installation and co ntamination where
contact is made with the toner
cartridge and HVPS Board. Clean as
necessary. If this does not correct
the problem, replace the following
FRUs one at a time in the order
shown:

HVPS Board
Engine/LVPS Board

Check the contacts for correct
installation and co ntamination where
contact is made with the toner
cartridge and HVPS Board. Clean as
necessary. If this does not correct
the problem, replace the following
FRUs one at a time in the order
shown:

HVPS Board
Engine Board

2-30 Service Manual

4044-XXX

Partial blank image/white spots (no periodic pattern)

FRU Action

Toner Cartridge Remove the toner cartridge and

Fuser Backup Roller Springs Check left and right backup roller

Paper Make sure recommended paper is

gently shake the assembly to evenly

distribute the toner. If toner cartridge

is low, try a new one.

springs and backup roller to ensure

adequate e ven pressu re is applied to

the fuser hotroll.

being used.

Variation in image density horizontally across page

FRU Action

Toner Cartridge The charge roll in the toner cartridge

Transfer Roller Bearing Assembly
Transfer Roller

may have an unbalanced pressure

against the PC drum. Try a new

toner cartridge.

Check the springs in the left and

right transfer roller bearings. The

bearing assemblies should support

the transfer roller, applying even

pressure to the PC drum. Replace

either or both transfer roller bearing

assemblies if the springs show signs

of damage or fatigue. Inspect the

transfer roller for signs of wear or

damage and replace as necessary.

Diagnostic Information 2-31

4044-XXX

Periodic irregularity down pa ge

FRU Action

PC Drum (Toner Cartridge)
Distance Between Irregularity

94.5 mm
Charge Roller (Toner Cartridge)

Distance Between Irregularity

37.8 mm
Supply Roller (Toner Cartridge)
Distance Between Irregularity

40.1 mm
Develo per Ro ll er

(Toner Cartridge)
Distance Between Irregularity

46.1 mm
Transfer Roller
Distance Between Irregularity

46.0 mm
Hot Roll

Distance Between Irregularity

56.7 mm

The PC drum or gear driving the PC
drum may be contaminated or
damaged. Inform the customer to
replace the toner cartridge.

The charge roller or gear driving the
charge roller may be contaminated
or damaged. Inform the customer to
replace the toner cartridge.

The supply roller or gear driving the
supply roller may be contaminated or
damaged. Inform the customer to
replace the toner cartridge.

The supply roller or gear driving the
developer roller may be
contaminated or damaged. Inform
the customer to replace the toner
cartridge.

The transfer rol ler or gear driving the
transfer roller may contaminated or
damaged. Inspect the roller and
gear. Replace as necessary.

The hot roll of the fuser or gear
driving the hot roll may be
contaminated or damaged. Inspect
the hot roll and gear. Replace or

clean as necessary.
Backup Roller
Distance Between Irregularity

69.1 mm

2-32 Service Manual

The backup roller of the fuser may

be contaminated or damaged.

Inspect and replace as necessary.

4044-XXX

Poor fusing of image

FRU Action

Fuser Lamp The fuser may not be operating at

Paper Make sure recommended paper is

the proper temperature to fuse the
toner to the paper . Go to the “Cold

Fuser Service Check” on page 2-17.

being used.

Light print

FRU Action

Toner Cartridge Make sure the toner cartridge is

installed correctly and is not low on
toner. If the problem continues,
install a new toner cartridge.

Transfer Roller
HVPS Contact (Transfer Roller)
HVPS Board

Check the transfer roller for signs of
toner buildup and contamination.
Inspect the HVPS contact (transfer
roller) for contamination. Inspect the
HVPS board for contamination
where it meets the HVPS contacts. 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 Board

Diagnostic Information 2-33

4044-XXX

White or black lines or bands

FRU Action

Toner Car tridge
Paper Feed 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 . Bandin g is prima rily due

to a variation in the speed of the

paper as it feeds through the printer

especially in the developer and

transfer process. Inspect the toner

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

signs of spilled toner. Gently clean

the contaminated areas with a soft

cloth or compressed air.
Fuser Hot Roll

Backup Roller

The fuser hot roll can c ause tone r on

the back of the paper if toner is

building up on the hot roll. This

buildup may transfer to the backup

roller, later transferring to the

backside of the paper. Inspect the

hot roll and back up roll er for signs of

contamination and replace as

necessary.
Transfer Roller A transfer roller contaminated with

toner can cause toner to transfer to

backside of printed pages. Inspect

the transfer roller for contamination

and replace as necessary.

Incorrect characters print

Make sure the correct printer driver software is installed. Incorrect
software can cause incorrect characters to print and the image may
not fit the page.

2-34 Service Manual

4044-XXX

Parallel Port Service Check

1. Perform a print test to make sure the printer prints correctly.

2. Be sure the printer cable is designed for bidirectional printing.

3. Be sure the user application is set up correctly. Improper set up
can prevent establishing a communication link with the printer.

4. Try enabling the parallel port pull-up resistors. Go to

Mode 1” on page 3-8

resistors. If the printer still does not print, disable the resistors.

5. If the internal print test page prints correctly, the user
application/printer driver is set up correctly and the correct bi­directional parallel cable is installed, yet the printer still fails to
print on command from the host, replace the controller board.

. Try printing a test page after enabling

“Parallel

Diagnostic Information 2-35

4044-XXX

2-36 Service Manual

4044-XXX

3. Diagnostic Aids

This chapter explains the tests and procedures you can run to
identify printer failures and verify that repairs have corrected the
problem.

Memory Test

The following tests run sequentially when performing this test:

Standard Memor y Test
Optional Memory Test

The memory test runs automatically during POST if a different size
optional memory SIMM is installed since the last printer power on.

Perform the following steps to run the Memory Test:

1. Turn the printer off.

2. Open the top cover.

3. Press and hold the operator panel button as you turn on the
printer. Release the button once the Error LED comes on solid.

4. Close the top cover.

5. If all the diagnostic tests run correctly, the Data LED blinks. If a
test fails, the Error LED pattern for the service error code dis­plays on the operator panel. Go to the “Service Error Codes” on

page 2-2 and take the indicated action for that error.

Diagnostic Test

Once the memory test is complete, the diagnostic test pages can be
printed by briefly pressing the operator panel button. Two pages are
printed. The first page is a listing of various printer settings and code
level. The second page is used to inspect registration. If the printer
requires a registration adjustment, you must contact your next level
of support to obtain the software utility that enables you to adjust
registration.

Diagnostic Aids 3-1

4044-XXX

Print Quality Test

There are three print quality test pages. The first page displays the
installed printer base code level and user default settings for the
following:

Top Margin Offset
Left Margin Offset
Printer Page Count
Installed Memory
PQET Setting (on/off)
Toner Saver (on/off)
Print Resolution
Print Darkness

The next two test pages are used to evaluate print quality. One test
page is gray and the other is black. Perform the following steps to
print the second test page:

1. Turn the printer off.

2. Open the top cover.

3. Turn the printer power on.

4. When the Error LED comes on solid, double-click the operator
panel button.

5. Once the Error and Press Button LEDs start blinking, close the
top cover.

6. The Ready LED comes on solid and the Error and Press Button
LED continue blinking.

7. Double-click the operator button four times. The Ready and
Data LEDs come on solid while the Error and Press Button
LEDs continue blinking.

8. Perform a long button press until all LEDs come on solid.

9. The test pages are printing.

10. When the test pages have finished printing, the Ready LED
comes on solid and the Data LED goes off.

Note: After the print quality test pages print, the printer automati­cally returns to the Ready mode.

3-2 Service Manual

4044-XXX

User Mode Print Test

The User Mode Print Test Page displays the user default values ,
installed options, printer features, various typefaces, and the
installed printer base code level.

1. Turn the printer power on. The Ready LED comes on solid
(printer is in the ready state).

2. Press and release the operator panel button.

3. The Ready LED comes on solid and the Data LED blinks indi­cating the printer is busy.

4. The test page prints and the operator panel Ready LED comes
on solid and the Data LED turns off.

5. The printer returns to the Ready mode.

Configuration Mode

The configuration mode gives the ability to set the following printer
functions through the operator panel:

Parallel Port Settings

Enable Port
NPA Mode
Protocol
Mode 1
Mode 2
Strobe Adjust

USB Settings

Enable Port
NPA Mode

PPDS Activated
Auto CRLF/LFCR

Diagnostic Aids 3-3

4044-XXX

Operator Panel Configuration Mode Button Definition

Term Description Result

Brief Button Press Press the operator

Long Button Press Press and hold the

Double-Click Button
Press

panel button no l onger
than three seconds.

operator panel button
for more than three
seconds.

Press and release the
operator panel button
two times. Each press
and release action
must be performed
within a half second.

This action moves
through the configura­tion mode settings.

This action selects
and saves the setting
for the menu item dis­played. To indicate
that the setting is
saved, all LEDs blink
once.

This action moves
through the configura­tion mode menu.

Perform the following steps to enter the configuration mode:

1. Turn the printer power off.

2. Open the top cover.

3. Turn the printer power on.

4. When the Error LED comes on solid, double-click the operator
panel button.

5. When the Error and Press Button LEDs start blinking, close the
top cover. The Ready LED comes on solid and the Error and
Press Button LEDs continue blinking.

6. Double-click the operator panel button two times. The Load
Paper LED comes on solid while the Error and Press Button
LEDs continue blinking.

7. Perform a long button press. All LEDs blink once. The Ready
LED stays on solid. The printer is in the configuration mode.

8. To exit the configuration mode, turn the printer power off.

Configuration Mode Operator Panel Overlays

When in configuration mode, the first menu item and its setting are
displayed. The first menu item is the Parallel P ort and is indicated by

3-4 Service Manual

4044-XXX

the solid Ready LED. The setting of the menu item is indicated by
the status of the Press Button LED. To change the menu item
setting, briefly press the operator panel button. Once the setting you
want is indicated by the status of the Pre ss Button LED, perform a
long button press to save the setting. All LEDs come on while the
setting is saved. To select other menu items, double-click the
operator panel button until the menu item LED you want is selected.

There are ten menu items that can be selected by using the five
LEDs as indicated by the following overlays on two passes through
the configuration menu. The first time through the menu the LED
selected is on solid. The second time through the menu the LED
selected is blinking.

First pass - LED on solid overlay.

Parallel Port
Parallel NPA
Parallel Protocol
PPDS
CRLF/LFCR
Off/On/Auto

Second pass - LED blinking overlay

Operator Panel Button

Parallel Mode 1
Parallel Mode 2
Parallel Strobe
USB Port
USB NPA
Off/On/Auto

Operator Panel Button

Diagnostic Aids 3-5

4044-XXX

Configuration Mode Settings

The following is a description of the available configuration mode
menu items and settings. The asterisk (*) indicates the factory
default setting.

Parallel Port

Parallel Port allows the user to enable or disable the parallel port. If
the port is not being used, disabling it frees allocated memory to be
used to process print jobs.

Perform the following steps to change the Parallel Port setting:

1. Enter the configuration mode.
Note: The Parallel Port (Ready) LED comes on solid. The

current Parallel Port setting is indicated by the Off/On/Auto
(Press Button) LED. When the LED is off, the parallel port is
disabled. When the LED is *blinking, the parallel port is enabled.

2. Perform a brief button press to select the Parallel Port setting.

3. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

4. Exit the configuration mode by turning the printer power off.

Parallel NPA

Parallel NPA mode allows two way communication between the host
and the printer.

Perform the following steps to change the Parallel NPA setting:

1. Enter the configuration mode.

2. Perform a double click button press. This moves to the Parallel
NPA item on the configuration menu. The Parallel NPA (Data)
LED comes on solid.

3. The current Parallel NPA setting is indicated by the Off/On/Auto
(Press Button) LED.

• When the LED is on solid, all data received by the printer

must be in NPA packets. Any non-packet data is rejected as
bad packets.

• When the LED is off, the printer is not performing any NPA

processing.

3-6 Service Manual

4044-XXX

• When the LED is *blinking, the printer examines incoming

data and decides whether it is receiving NPA packets.

4. Perf orm a brief button press to select the Parallel NPA setting.

5. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

6. Exit the configuration mode by turning the printer power off.

Parallel Protocol

The printer supports two parallel protocol settings: standard and
fastbytes. When the protocol is set to standard, information is
received at a normal transmission rate. When the protocol is set to
fastbytes, information can be received at a much faster transmission
rate provided the host computer supports the fastbytes mode.

Perform the following steps to change the Parallel Protocol setting:

1. Enter the configuration mode.

2. Perform a double click button press twice. This moves to the
Parallel Protocol item on the configuration menu. The Parallel
Protocol (Load Paper) LED comes on solid.

3. The current Parallel Protocol setting is indicated by the Off/On/
Auto (Press Button) LED. When the LED is off, the Parallel
Protocol is set to standard. When the LED is *on, the Parallel
Protocol is set to fastbytes. Perform a brief button press to
select the Parallel Protocol setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

PPDS

To access the PPDS data stream, the PPDS setting must be set to
active. When PPDS is activated, the default Printer Language is
changed to PPDS and the default PCL and PostScript Smartswitch
settings are changed to Off.

Perform the following steps to change the PPDS setting:

1. Enter the configuration mode.

2. Perform a double click button press three times. This moves to
the PPDS item on the configuration menu. The PPDS (Paper
Jam) LED comes on solid.

Diagnostic Aids 3-7

4044-XXX

3. The current PPDS setting is indicated by the Off/On/Auto (Press
Button) LED. When the LED is *off, the PPDS is set to inactive.
When the LED is on, the PPDS is set to active. Perform a brief
button press to select the PPDS setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

CRLF/LFCR

This function controls whether or not the printer automatically
performs a carriage return after a line feed control command and
whether or not the printer automatically performs a line feed after a
carriage return control command.

Perf orm the following steps to change the CRLF/LFCR setting:

1. Enter the configuration mode.

2. Perform a double click button press four times. This moves to
the CRLF/LFCR item on the configuration menu. The CRLF/
LFCR (Error) LED comes on solid.

3. The current CRLF/LFCR setting is indicated by the Off/On/Auto
(Press Button) LED.

• When the LED is *off, Auto CR after LF is off and Auto LF

after CR is off.

• When the LED is on, Auto CR after LF is on and Auto LF

after CR is off.

• When the LED is blinking, Auto CR after LF is off and Auto

LF after CR is on.

4. Perform a brief button press to select the CRLF/LFCR setting.

5. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

6. Exit the configuration mode by turning the printer power off.

Parallel Mode 1

Parallel Mode 1 controls whether or not resistors are enabled on the
parallel post signals. The default is to not have the resistors enabled,
however, this function is useful because some IBM clone PC’s have
open collector outputs on their parallel port signals.

3-8 Service Manual

4044-XXX

Perform the following steps to change the Parallel Mode 1 setting:

1. Enter the configuration mode.

2. Perform a double click button press five times. This moves to
the Parallel Mode 1 item on the configuration menu. The Parallel
Mode 1 (Ready) LED is blinking.

3. The current Parallel Mode 1 setting is indicated by the Off/On/
Auto (Press Button) LED. When the LED is off, the Parallel
Mode 1 is set to off. When the LED is *on, the Parallel Mode 1 is
set to on. Perform a brief button press to select the Parallel
Mode 1 setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

Parallel Mode 2

Parallel Mode 2 controls whether or not the parallel port data is
sampled on the leading or trailing edge of strobe. The default is to
sample on the leading edge of strobe, however, some IBM clone
PC’s assumes that a printer will sample on the trailing edge.

Perform the following steps to change the Parallel Mode 2 setting:

1. Enter the configuration mode.

2. Perform a double click button press six times. This moves to the
Parallel Mode 2 item on the configuration menu. The Parallel
Mode 2 (Data) LED is blinking.

3. The current Parallel Mode 2 setting is indicated by the Off/On/
Auto (Press Button) LED. When the LED is off, the Parallel
Mode 2 is set to sample on trailing edge. When the LED is *on,
the Parallel Mode 2 is set to sample on leading edge. Perform a
brief button press to select the Parallel Mode 2 setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

Parallel Strobe

This setting allows the user to adjust the factory setting for the
amount of time strobe is sampled to determine that valid data is

Diagnostic Aids 3-9

4044-XXX

available on the parallel port. Each increment of the strobe adjust
value means the strobe is sampled 50ns longer.

Perform the following steps to change the Parallel Strobe Adjust:

1. Enter the configuration mode.

2. Perform a double click button press seven times. This moves to
the Parallel Strobe item on the configuration menu. The Parallel
Strobe (Load Paper) LED is blinking.

3. The current Parallel Strobe setting is indicated by the Off/On/
Auto (Press Button) LED. When the LED is *off, the Parallel
Strobe is set to normal. When the LED is on, the Parallel Strobe
is set to +1. When the LED is blinking, the Parallel Strobe is set
to +2. Perform a brief button press to select the Parallel Strobe
setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

USB Port

This menu item allows the user to enable or disable the USB port. If
the port is not being used, disabling it frees allocated memory to be
used to process print jobs.

Perform the following steps to change the USB Port setting:

1. Enter the configuration mode.

2. Perform a double click button press eight times. This moves to
the USB Port item on the configuration menu. The USB Port
(Paper Jam) LED is blinking.

3. The current USB Port setting is indicated by the Off/On/Auto
(Press Button) LED. When the LED is off, the USB Port is
disabled. When the LED is *blinking, the USB Port is enabled.
Perform a brief button press to select a different USB Port
setting.

4. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

5. Exit the configuration mode by turning the printer power off.

3-10 Service Manual

4044-XXX

USB NPA

USB NP A mode allows for two wa y communication between the host
and the printer.

Perform the following steps to change the USB NPA setting:

1. Enter the configuration mode.

2. Perform a double click button press nine times. This moves to
the USB NPA mode item on the configuration menu. The USB
NPA (Error) LED is blinking.

3. The current USB NPA setting is indicated by the Off/On/Auto
(Press Button) LED.

• When the LED is off, the USB port does not search for NPA

data within the received data.

• When the LED is *blinking, the USB port searches for

optional NPA data within the received data.

• When the LED is on solid, the USB port requires that data

sent to the printer be in NPA format.

4. Perform a brief button press to select a different USB NPA
setting.

5. Perform a long button press. All LEDs blink once, indicating the
setting is saved.

6. Exit the configuration mode by turning the printer power off.

Hex Trace

When the printer is in Hex Trace, it prints a hexadecimal and a
character representation of a print job. The printer does not
recognize any print controls or commands in this mode. A Hex Trace
printout is used to help isolate the cause of print problems.

When a job is printed, the printer operator panel displays the Hex
Trace indication, (Ready LED blinking), showing that the printer
remains in the Hex Trace mode. Turn the printer power off or do an
operator panel reset (long button press) to exit the Hex Trace mode.

Perform the following steps to enter the Hex Trace mode:

1. Turn the printer power off.

2. Open the top cover.

3. Turn the printer power on.

Diagnostic Aids 3-11

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4. When the Error LED comes on solid, double-click the opera­tor panel button.

5. Once the Error and Press Button LEDs start to blink, close
the top cover.

6. The Ready LED comes on solid and the Error and Press
Button LEDs continue blinking.

7. Double-click the operator button three times. The Paper Jam
LED comes on solid while the Error and Press Button LEDs
continue blinking.

8. Perform a long button press until all LEDs come on solid.
The printer is i n Hex Trace mode

9. To exit the Hex Trace mode, turn the printer power off.

Restoring Factory Defaults

Restoring factory defaults returns the printer settings to the original
factory settings.

Perform the following steps to invoke factory defaults:

1. Turn the printer po wer off.

2. Open the top cover.

3. Turn the printer po wer on.

4. When the Error LED comes on solid, double-click the opera­tor panel button.

5. Once the Error and Press Button LEDs start blinking, close
the top cover.

6. The Ready LED comes on solid and the Error and Press
Button LEDs continue blinking.

7. Double-click the operator button one time. The Data LED
comes on solid while the Error and Press Button LEDs con­tinue blinking.

8. Perform a long button press until all LEDs come on solid.

9. The printer is reset to factory defaults.

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Engine Clean Cycle

The Engine Clean Cycle function prints one blank page in a special
cleaning mode. The cleaning mode helps eliminate small specs of
toner present in the background when printing.

Perform the following steps to perform the Engine Clean Cycle:

1. Turn the printer po wer off.

2. Open the top cover.

3. Turn the printer po wer on.

4. When the Error LED comes on solid, double-click the operator
panel button.

5. Once the Error and Press Button LEDs start blinking, close the
top cover.

6. The Ready LED comes on solid and the Error and Press Button
LEDs continue blinking.

7. Perform a long button press until all LEDs come on solid.

8. The printer feeds one page from the automatic paper feed slot
and then returns to normal printing mode.

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Toggle Demo/Normal Mode

The Toggle Demo/Normal Mode function enables or disables the
printer’s retail demo mode. When the printer is in Demo mode, demo
pages can be printed by briefly pressing the operator panel button.

Perform the following steps to enter Toggle Demo/Normal Mode:

1. Turn the printer power off.

2. Open the top cover.

3. Turn the printer power on.

4. When the Error LED comes on solid, double-click the operator
panel button.

5. Once the Error and Press Button LEDs start blinking, close the
top cover.

6. The Ready LED comes on solid and the Error and Press Button
LEDs continue blinking.

7. Double-click the operator button five times. The Ready and
Load Paper LEDs come on solid while the Error and Press
Button LEDs continue blinking.

8. Perform a long button press until all LEDs come on solid. The
printer is in Demo mode.

9. To return the printer to Normal mode, repeat steps 1 through 8.

Printer Operation

Paper is held in a 150 page tray where it is picked by a center-fed
"D" shape pick roller. The paper follows an "L" shape path as it
moves through the printer. Images are created with toner on an OPC
drum within the toner cartridge. A transfer roller then draws the toner
off the OPC drum onto the paper. Once the toner is affixed to the
paper by the fuser, the paper exits either the top or front of the
printer.

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Paper Path

Diagnostic Aids 3-15

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4. Repair Information

CAUTION: Read the following before handling electronic parts.

Handling ESD-Sensitive P arts

Many electronic products use parts that are known to be sensitive to
electrostatic discharge (ESD). To prevent damage to ESD-sensitive
parts, follow the instructions below in addition to all the usual
precautions, such as turning off power before removing logic boards:

• Keep the ESD-sensitive part in its original shipping container (a

special “ESD bag”) until you are ready to install the part into the
machine.

• Make the least-possible movements with your body to prevent

an increase of static electricity from clothing fibers, carpets, and
furniture.

• Put the ESD wrist strap on your wrist. Connect the wrist band to

the system ground point. This discharges any static electricity in
your body to the machine.

• Hold the ESD-sensitive part by its edge connector shroud

(cover); do not touch its pins. If you are removing a pluggable
module, use the correct tool.

• Do not place the ESD-sensitive part on the machine cover or on

a metal table; if you need to put down the ESD-sensitive part for
any reason, first put it into its special bag.

• Machine covers and metal tables are electrical grounds. They

increase the risk of damage because they make a discharge
path from your body through the ESD-sensitive part. (Large
metal objects can be discharge paths without being grounded.)

• Prevent ESD-sensitive parts from being accidentally touched by

other personnel. Install machine covers when you are not work­ing on the machine, and do not put unprotected ESD-sensitive
parts on a table.

• If possible, keep all ESD-sensitive parts in a grounded metal

cabinet (case).

• Be extra careful in working with ESD-sensitive parts when cold-

weather heating is used because low humidity increases static
electricity.

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Removal Procedures

CAUTION: Be sure to unplug the power cord whenever you are

working on the printer with one of the covers removed. Be sure to
remove the print cartridge before you perform removal procedures.

Screw Identification Table

Type 1 Screw Type 2 Screw Type 3 Screw Type 4 Screw

Covers

Front Cover and F ace Up Cover

1. Press the cover inward to release it and pull it forward.

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2. Remove the face up cover.

3. Open the front cover.

Repair Information 4-3

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4. Remove the screw from the support on each side of the printer.

Note: If you want to remove the front cover only, remove the two
screws and then remove the panel board and board cover.

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Rear and Top Cover

1. Remove the three screws, press the retaining tabs and remove
the rear cover.

2. Remove the front cover and face up cover .

3. Remove the two screws and remove the top cover.

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Side Covers

1. Remove the front cover , face up cover, top cover and rear cover.

2. Remove the two screws securing the rear of each side cover.

3. Release the side cover tabs as shown and remove the left and
right side covers.

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Frame Assembly

1. Remove all covers.

2. Remove the HVPS.

3. Remove the two screws and remove the solenoid.

4. Remove the six screws and remove the frame assembly.

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Fuser Assembly

1. Remove all covers.

2. Remove the wire cover mounting screw (A).

3. Remove the two fuser lamp wire mounting screws (B).

4. Unplug the connector from the engine/LVPS board.

5. Remove the two fuser mounting screws (C).

6. Release the two snaps holdi ng the fuser down.

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7. Slide the fuser in the direction of the arrows and remove the
fuser.

Note: The backup roller can fall from the printer if the printer is
turned on its side with the fuser removed.

Repair Information 4-9

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HVPS

1. Remove all covers.

2. Remove the HVPS board mounting screws.

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3. Unplug the three cables from the connectors on top of the
HVPS.

4. Unplug the cable from the lower connector inside the HVPS and
remove the HVPS.

Note: The high voltage contacts can fall from the printer with the
HVPS removed. Three contacts with the shorter springs are
installed in the hole marked L+S. The contact with the longer spring
is installed in the hole marked L+L.

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Interconnect Board (model E310)

1. Remove the LVPS.

2. Unplug all connectors from the interconnect board.

3. Remove the screws and remove the interconnect board.

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Engine/LVPS Board (model E310)

1. Turn the printer upside down.

2. Remove all screws securing the SIMM access panel.

3. Remove the SIMM access panel.

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4. Unplug all the connectors from the engine/LVPS board.

5. Remove the five screws and remove the engine/LVPS board.

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Engine/LVPS Board (model E312)

1. Turn the printer upside down.

2. Remove all screws securing the SIMM access panel.

3. Remove the SIMM access panel.

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4. Remove the five screws securing the LVPS shield.

5. Lift the shield from the printer and disconnect all the cables from
the LVPS.

6. Remove the screws mounting the LVPS to the shield and
remove the LVPS.

7. Disconnect all the cables from the engine board.

8. Remove the screws mounting the engine board to the lower
frame and remove the engine board.

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Main Drive Assembly

1. Remove all covers.

2. Remove the six main drive assembly mounting screws.

3. Unplug the connector and remove the main drive assembly.

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Pick Roll Assembly

1. Remove all the covers.

2. Remove the high voltage power supply.

3. Remove the roller bearing.

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4. Remove the roller access cover on the left side of the pick roller
assembly.

5. Remove the upper frame.

6. Remove the pick up roller gear and clutch.

7. Lift the pick roll assembly from the printer.

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Printhead Ass embly

1. Remove the top cover.

2. Unplug all the connectors from the printhead.

3. Remove the four mounting screws and remove the printhead.

Note: Be sure to transfer the snap-on torroids when replacing the
printhead cable.

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Transfer Roll

1. Remove the front cover and face up cover .

2. Remove the black cover on the left end of the transfer roll.

3. Press the latches on the bearings to release them from the
lower frame.

4. Lift the transfer roll from the printer.

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5. Connector Locations

Controller Board (model E310/E312)

Connector Pin No. Signal

J1 Printhead 1 N/A

2 Ground

U5 Operator Panel
(signals at idle)

J7 Engine/LVPS Board 1 +5 V dc

1 Ground
2+5 V dc
3+5 V dc
4N/A
5+5 V dc
6 Ground

2+5 V dc
3+5 V dc
4+5 V dc
5+5 V dc
6+5 V dc
7 Ground
8+5 V dc
9+5 V dc
10 +5 V dc
11 Ground
12 +5 V dc
13 +5 V dc
14 +5 V dc

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Connector Pin No. Signal

J7 (continued) 15 +5 V dc

16 +5 V dc
17 +5 V dc
18 Ground
19 Ground
20 Ground
21 Ground
22 Ground
23 +5 V dc
24 +5 V dc

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Connector Locations 5-3

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Engine/LVPS Board (model E310)

Connector Pin No. Signal

CN201 Power Switch 1 AC In

2AC In

CN202 Fuser Lamp 1 AC In

2AC In

CN1 Thermistor 1 THERM

2 +3.9 V dc

CN2 HVPS/Printhead 1 +24 V dc SWITCH

2 +24 V dc
3 Ground
4 +24 V dc
5VDO
6MHV

5-4 Service Manual

7LDON
8 SUPPLY
9 Ground
10 DEV350