Lexmark X125, 4412-001 Service Manual

Lexmark X125

• Table of Contents

• Start Diagnostics

• Safety and Notices

All-In-One

4412-001

• Trademarks

•Index

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

4412-001

Edition: July 2002
The following paragraph does not apply to any country where such provisions are

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

PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRE SS OR
IMPLIED , INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do
not allow disclaimer of express or implied warranties in certain transactions; therefore, this
statement may not apply to you.

This publication could include technical inaccuracies or typographical errors. Changes are
periodically made to the information herein; these changes will be incorporated in later
editions. Improvements or changes in the products or the programs described may be
made at any time.

Comments may be addressed to Lexmark International, Inc., Department D22A/032-2,
740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at
[e-mail]. 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 Lexmark with diamond design 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. 2002.
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.

P/N 12G9148

4412-001

Table of Contents

Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x

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

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Printer Engine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Printhead. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Facsimile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Power and Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

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

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

Power-On Self Test (POST) Sequence . . . . . . . . . . . . . . . . . 2-1

POST Symptom Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Symptom Ta bles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Carrier Transport Service Check. . . . . . . . . . . . . . . . . . . . . . . 2-7

CIS Assembly Service Check. . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Scanner Motor with Gear Assembly Service Check . . . . . . . 2-10

Maintenance Station Service Check . . . . . . . . . . . . . . . . . . . 2-11

Paper Feed Service Check. . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Paper Path Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Power Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Print Quality Service Check . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Scan/Copy Quality Service Check . . . . . . . . . . . . . . . . . . . . 2-18

Fax/Telephone Communication Service Check . . . . . . . . . . 2-19

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

Theory of Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Scanner Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Drive Feed Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Contact Image Sensor (CIS). . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Document Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

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

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

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

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

iii

4412-001

Releasing Plastic Latches . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

Removals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

General Precautions on Removals. . . . . . . . . . . . . . . . . . . . . .4-3

CIS White Roller Assembly Removal. . . . . . . . . . . . . . . . . . . .4-4

Top Cover Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . .4-5

Rollers (Drive Feed Roller Assembly, Exit Shaft) Removal . . .4-6

CIS (Contact Image Sensor) Removal. . . . . . . . . . . . . . . . . . .4-7

Scanner Motor with Gear Assembly Removal . . . . . . . . . . . . .4-9

Power Supply Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Line Interface Board Removal . . . . . . . . . . . . . . . . . . . . . . . .4-12

Operator Panel Assembly Removal . . . . . . . . . . . . . . . . . . . .4-13

Printer Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

ASF Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15

Maintenance Station Removal . . . . . . . . . . . . . . . . . . . . . . . .4-17

Carrier Assembly with Belt Removal . . . . . . . . . . . . . . . . . . .4-18

System Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19

Mid Frame Assembly with Exit Rollers Removal . . . . . . . . . .4-20

Large Feed Roller Assembly with Gear Removal . . . . . . . . .4-21

Paper Feed Motor Assembly with Gears Removal . . . . . . . .4-22

Carrier Transport Motor Removal. . . . . . . . . . . . . . . . . . . . . .4-23

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

System Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Line Interface Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2

Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Lubrication Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1

How to Use This Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . .7-1

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

iv Service Manual

4412-001

Safety Information

• 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
necessar y pr ec autions.

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 sp écifiques. 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

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

Safety Information v

4412-001

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.

• 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.

Sicherheitshinweise

• Dieses Produkt und die zugehörigen Komponenten wurden

entworfen und getestet, um beim Einsatz die weltweit gültigen
Sicherheitsanforderungen zu erfüllen. 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.

vi Service Manual

4412-001

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.

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 utiliza ção de outros componentes de
substituição.

• As informações de segurança relativas a este produto

destinam-se a profissio nai s destes serviços e não devem ser
utilizadas por outras pessoas.

• Risco de choques eléctricos e ferimentos graves durante a

desmontagem e manutenção deste produto. Os profissionais
destes serviços devem estar avisados deste facto e tomar os
cuidados necessários.

Safety Information vii

4412-001

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.

• 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 serv e i d’aquest producte.
El personal professional ha d’estar-ne assabentat i prendre les
mesures convenients.

viii Service Manual

4412-001

Safety Information ix

4412-001

Preface

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

1. General Information contains a general description of the All­In-One and the maintenance approach used to repair it. Special
tools and test equipment are listed.

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

3. Diagnostic Aids contains tests and checks used to locate or
repeat symptoms of All-In-One problems.

4. Repair Information provides instructions for making All-In-One
adjustments and removing and installing FRUs.

5. Connector Locations uses illustrations to identify the
connector locations and test points on the All-In-One.

6. Preventive Maintenance contains the lubrication specifications
and recommendations to prevent problems.

7. Parts Catalog contains illustrations and part numbers for
individual FRUs.

x Service Manual

4412-001

1. General Information

The Lexmark™ X125 All-In-One is a letter quality print, fax, copy,
and scan machine. The printhead uses small heater plates and
nozzles to control ink flow and the formation of characters on the
print media. The printhead assembly and ink supply are combined
into a single unit. Print cartridges are available as a customer
replaceable supply item. Dual printheads provide color and true
black printing without changing printheads. The number and size of
inkjets or nozzles, in the printhead, determines the overall quality
and capability of the printer. The black cartridge has a total of 208
nozzles and installs on the right. The color cartridge has a total of
192 nozzles and installs on the left. The printer is capable of printing
in both directions from either cartridge.

General Information 1-1

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Specifications

Printer Engine

Technology Thermal Inkjet

2-pin and printhead swapping
type

Speed Color 8 ppm at Draft Mode

Mono 16 ppm at Draft Mode

Resolution Color 600 X 600 dpi (1200 X 2400

dpi addressable)

Mono 600 X 600 dpi (1200 X 2400

Printing Width 203 mm
Feeding Method Automatic 100 sheets of 20 lb cut s heets

Manual Tray No
Emulation Host Based Printing (GDI)
Printer Driver Windows 98/ME, Windo ws

Interface USB Interface

dpi addressable)

(Max 10 mm)

2000/Windows XP

Printhead

Babbage Mono Standard Birch Color

Printhead 208 nozzles 192 nozzles
Ink Type Pigment Dye
Ink Color Black Color
Ink Yield About 600 sheets About 200 sheets

1-2 Service Manual

4412-001

Facsimile

General Compatibility ITU-G3

Scan Method CIS
Scan Width Maximum 216 mm, Effective 210 mm
Scan Resolution 600 X 1200 dpi
Scan Speed 6 seconds
Feeding Method Sheet Feed
ADF 30 sheets of 20 lb
Guide Document Input Guide
Stacker Document Output Stacker/Paper

Paper Tray Bin Type (without Manual Tray)
Modem Speed 33.6 Kbps
Coding Method MH, MR, MMR, Error Correction Mode
LCD 2 lines of 16 characters each

Scanning Resolution and

Type

Contrast Darkest/Darken/Normal

Memory Capacity 1 Mbyte

Back-up Time 15 sec (Continuous power failure,

Confidential No
Forced Memor y TX Yes

Stacker

Standard: 200 X 100 dpi
Fine: 200 X 200 dpi (default)
Super Fine: 300 X 300 dpi
Color: 200 X 200 dpi

(Standard: Low quality, Fine: High
quality compression)

Lighten/Lightest

typically 1-2 minutes )

Memory RX Automatic reception when paper empty.

General Information 1-3

4412-001

Telephone Speed Dial 70 locations

Chain Dial No
On-Hook Dial Yes, 1-Key
Last Number Redial Yes, 1-Key
Auto Redial Yes
Hold and Mute No
Pause Yes, u se Redial Key
Ringer Volume S/W Option Setting (4 steps)
Tone/Pulse Select S/W Option Setting
DRPD USA: Yes, Other Countries: Yes

Report and
List

Copy Multipage Copy Up to 99 pages

Telephone
I/F

Others Sensors Paper Jam

TX/RX Journal Yes
Image TCR Yes, reduction of first page sent by

System Data Yes
Telephone Number

List
Self Test Yes

Grayscale 256 levels
Reduction and

Enlargement

Answering I/F Yes
Extension Phone 1-jack, extension phone transfer

Real-Time Clock No
RTI Yes

Memory TX

Yes

25% - 200%
(Reference is the top center of
document.)

1-4 Service Manual

4412-001

Scanner

Compatibility TWAIN
Technology Platen CIS
Light Source for Color CIS RGB LEDs (Line Order Control)

Power and Size

Power Source 110V-240V / 50Hz-60Hz
Dimensions 440.6 X 319.6 X 205.4 mm
Weight (Packed) 15.3 lbs (Packed Weight)

Abbreviations

ASF Auto Sheet Feed
B/M Bill of Material
CIS Contact Image Sensor
EOF End of Form
ESD Electrostatic Discharge
FPC Flat Printhead Cable
FRU Field Replaceable Unit
HVPS High Voltage Power Supply
LCD Liquid Crystal Display
LVPS Low Voltage Power Supply
OEM Original Equipment Manufacturer
V ac Volts alternating current
V dc Volts direct current
ZIF Zero Insertion Force

General Information 1-5

4412-001

1-6 Service Manual

4412-001

2. Diagnostic Information

Start

Power-On Self Test (POST) Sequence

1. Power Up Please Wa it is displayed on the LCD.

2. Carrier moves to the left and the paper feed motor runs then
stops.

3. Carrier returns to the right.

4. Ready, ANS/FAX, and the Date and Time display when POST is
complete.

If your printer completes POST with no errors, go to the “Symptom

Tables” on page 2-3. Locate the symptom and take the indicated

action.
If your printer does not complete POST, locate the symptom in the

following table and take the indicated action.

Diagnostic Information 2-1

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POST Symptom Table

Symptom Action

LCD or operator
panel button s do
not work and no
motors run

Paper f ee d
gears do not
turn

Carrier does not
move

Carrier slams
side frame

CIS light does
not turn on

Go to the “Power Service Check” on page 2-15. If okay,
go to the “Operator Pane l Problems” on page 2-3.

Go to the “Pa per Feed Service C heck” on page 2-12.

Go to the “Carrier Transport Service Check” on

page 2-7.

Go to the “Carrier Transport Service Check” on

page 2-7.

Go to the “CIS Assemb l y Service Ch eck” on page 2-9.

2-2 Service Manual

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Symptom Tables

Locate the symptom in the following tables and take the appropriate
action.

Carrier Transport Problems

Symptom Action

• No carrier movement

• Slow carrier movement

• Carrier stops

• Carrier slams side frame

Go to the “Carrier Tr ansport

Service Check” on page 2-7.

Maintenance Station Problems

Symptom Action

Maintenance station:

• Fails to cap the printheads

• Fails to clean the printheads

Go to the “Maintenance Station

Service Check” on page 2-11.

Operator Panel Problems

Symptom Action

• Buttons do not work

• LCD does not display

Check operator panel cable
connection at P9 on the system
board. Run the “Power-On Self

Test (POST) Sequence” on
page 2-1. If the LCD or buttons fail,

check connection P9. If the problem
remains, replace the operator panel
assembly. Go to the “Operator

Panel Assembly Removal” on
page 4-13.

If the problem sti ll e xists , rep lace the
system board. Go to the “System

Board Removal” on page 4-19.

Diagnostic Information 2-3

4412-001

Symptom Action

Document scan sensor does not
detect document

Check operator panel cable
connector P9 on the sy stem board. If
okay, go to the “Scanner Motor

with Gear Assembly Service
Check” on page 2-10. If the

scanner motor is working correctly,
replace the oper ator panel ass embly.
Go to the “Operator Panel

Assembly Removal” on pa ge 4-13.

2-4 Service Manual

4412-001

Printer Communication Proble m

Symptom Action

Not able to print Self Test Page Check the USB cable and system

board cable connections. If okay,
replace system board. Go to the

“System Board Removal” on
page 4-19.

Scanner Problems

Symptom Action

Light does not turn on Go to the “CIS Assembly Service

• Scanned images are faded, or
colors are dull, blurry or fuzzy.
Images are slanted or crooked
and the straight lines in the
image appear to be jagged or
uneven.

• Blank co pies

• Scanner motor does not run

• Document sensor does not

work

Check” on page 2-9 .

Go to the “Scan/Copy Quality

Service Check” on page 2-18.

Go to the “Scanner Motor with

Gear Assembly Service Check”
on page 2-10.

Go to the “Operator Panel

Problems” on page 2-3.

• CIS white roller assembly slips

• Paper does not feed correctly

Go to the “Paper Path Service

Check” on page 2-14.

Diagnostic Information 2-5

4412-001

Paper Feed Problems

Symptom Action

• Fails to pick paper

• Picks more than one sheet of

paper

• Picks paper but fails to feed

• Paper jams

• Paper fails to exit

• Noisy paper feed

Envelopes fail to feed Go to the “Paper Feed Service

Paper skews Go to the “Paper Path Service

Go to the “Paper Feed Service

Check” on page 2-12.

Check” on page 2-12.

Check” on page 2-14.

Power Problems

Symptom Action

No power in machine, motors do
not operate

Go to the “Power Service Check”

on page 2-15.

Print Quality Problems

Symptom Action

• Voids in characters

• Light print

• Prints off the page

• Fuzzy print

• Carrier moves but no print

• Printhead dries prematurely

• Colors print incorrectly

• Vertical alignment off

Go to the “Print Quality Service

Check” on page 2-16.

• Ink smearing

• Vertical streaks on paper

• Print lines crowded

2-6 Service Manual

Go to the “Paper Feed Service

Check” on page 2-12.

4412-001

Service Checks

Carrier Transport Service Check

FRU Action

1 System Board

Carrier Transport
Motor

2 Carrier Transport

Motor

Check the carrier transport motor connector P4. If
connected, check for approximately 29 volts on
pins 1 and 2 or at the wire connections located on
the rear of the carrier transport motor. If voltage is
incorrect, replace the system board. If voltage is
correct, check the motor for shorts.

Check the motor for binds, or loose motor pulley.
A noisy or chattering motor, or a motor that fails to

turn, can be caused by:

• An open or short in the motor

• An open or short in the motor driver

on the system board

• A bind in the carrier transport

mechanism

With the carrier transport motor cable (P4)
disconnected from the syst em board, che ck for 0
to 16 ohms between the following pins on the
motor:

P4-1 and P4-2

If the readings are incorrect, replace the print
engine. Go to the “Carrier Transport Motor

Removal” on page 4-23.

3 Carrier Guide Rod Clean the carrier rod.

Note: Lubricate the rod and th e carrier rod bea ring
surfaces with grease P/N 99A0394.

Diagnostic Information 2-7

4412-001

FRU Action

4 Encoder Strip

Carrier Assembly
with Belt

5 Carrier Transport

Belt
Idler Pulley
Assembly

6 Maintenance

Station

7 Access Door

Sensor

Check the encoder strip for proper installation.
Also, chec k it for wear, dirt, and grease . R ep lac e i f
needed.

Be sure all printhead connectors are fully sea ted.
Check the cables for damage.

If the encoder strip and all connections are okay,
but the carrier still slams the side frame, replace
the carrier assembly with belt. Go to the “Carrier

Assembly with Belt Removal” on page 4-18. If

problem remains , replac e the syst em board. G o to
the “System Board Removal” on page 4-19.

Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement. If pulley
assembly is damaged, replace.

Lubricate carrier to carrier frame enga geme nt with
grease P/N 99A0394.

A problem with the maintenan ce sta tion can ca use
carrier movemen t prob lems at the right margi n. Go
to the “Maintenance Station Removal” on

page 4-17.

If the carrier does not move toward the cartridge
load position when the access door is opened,
verify that power is on. If the carrier still doe s not
move, check connector P11 pin 1 for
approximately 3 volts, with the door open. If the
voltage is correct, replace the sensor. Disconnect
P11 from the system board before removing
sensor. If the voltage is incorrect, replace the
system board. Go to the “System Board

Removal” on page 4-19.

2-8 Service Manual

4412-001

CIS Assembly Service Check

The CIS lamp does not light when scanning is in process.

FRU Action

1 CIS Assembly If light does not come on during the

scanning process, check connector
P2 on the system board. If the
connection is okay, check for a
voltage reading of approximately 4
volts from ground to P2-2 pin. If
voltage is correct, replace the CIS
assembly. Go to the “CIS (Contact

Image Sensor) Removal” on
page 4-7. If voltage is incorrect,

replace the system board. Go to the

“System Board Removal” on
page 4-19.

Diagnostic Information 2-9

4412-001

Scanner Motor with Gear Assembly Service Check

Motor will not run.

FRU Action

1 Scanner Motor with Gear

Assembly

Check scanner motor for shorts.
Disconnect connector P6 from the
system board and check for
approximately 6 ohms between the
following pins on the motor
connector.

P6-1 and P6-2

If the ohms reading is incorrect,
replace the scanner motor as sembly.
If the motor does not come on during
the scanning process, check
connector P6 on the sy stem board. If
the connection is okay, check for
voltage reading of approximately 29
volts at pins

P6-1
P6-2
P6-3
P6-4

If voltage is correct, replace the
scanner motor with gear assembly.
Go to the “Scanner Motor with

Gear Assembly Removal” on
page 4-9. If voltage is incorrect,

replace the system board. Go to the

“System Board Removal” on
page 4-19.

2 Document Scanner Sensor To check the document scanner

sensor, insert a sheet of paper or
press the sensor to see if the
scanner motor is working. Go to

“Operator Panel Problems” on
page 2-3.

2-10 Service Manual

4412-001

Maintenance Station Service Check

The maintenance station has three functions:

1. Wipes the printhead nozzles to clean them of dirt.

2. Provides a place for printheads to fire all nozzles, keeping them
clear prior to printing.

3. Seals the printhead when it is not being used to prevent the
nozzles from drying.

FRU Action

1 Maintenance

Station Assembly

As the carrier moves to the right over the
maintenance station, a slot on the bottom of the
carrier engages a tab on the sled of the
maintenance station causing the cap to rise and
seal the printhead. Carrier movement to the left
uncaps the printhead. The wiper cleans the
printhead nozzles as the carrier lea ves the
maintenance statio n. The wiper cleans the
printhead only when the carrier is moving to the
left. Do not wipe the printhead nozzles when the
carrier is moving to the right. After the cleaning
operation is complete, a tab on the maintenance
station engages a tab on the carrier, causing the
wiper to lower.

Check the maintenance station for worn or broken
parts. Replace if nee ded. Go to t he “Maintenance

Station Removal” on page 4-17.

Worn wipers cau se degr aded print qual ity just af ter
a maintenance cleaning. Check for loose or worn
wipers.

Worn caps caus e the p rinthead no zzles to dry and
clog. Check for loose or worn caps.

Diagnostic Information 2-11