Lexmark X73 Scan/Print/Copy
• Table of Contents
• Start Diagnostics
• Safety and Notices
• Trademarks
• Index
Lexmark and Lexmark with diamond
design are trademarks of Lexmark
International, Inc., registered in the
United States and/or other countries.
4402-001
Table of Contents
Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Power-On Self Test (POST) Sequence . . . . . . . . . . . . . . . . . . . . 2-1
POST Symptom Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Symptom Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Service Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Carrier Transport Service Check . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
CCD Module Assembly Service Check . . . . . . . . . . . . . . . . . . . . 2-8
Paper Feed Service Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Paper Path Service Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Scan/Copy Quality Service Check . . . . . . . . . . . . . . . . . . . . . . . 2-17
Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Test Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Handling ESD-Sensitive Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
iii
4402-001
Removal Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Releasing Plastic Latches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Scanner Lid Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Rear Cover Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Operator Panel Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Top Housing Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Paper Support Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
CCD Module Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Gear Train Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Access Cover Sensor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Right Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Access Cover Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Left Cover Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Middle Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
System Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
Carrier Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Lubrication Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Assembly 1: Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Assembly 2: Paper Feed, Frame and Carrier Transport . . . . . . . . . .7-6
Assembly 3: Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1
iv Service Manual
4402-001
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
necessary precautions.
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
certains risques électriques, le personnel d'entretien qualifié
devra prendre toutes les précautions nécessaires.
Safety Information v
4402-001
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
4402-001
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 utilização de outros componentes de
substituição.
• As informações de segurança relativas a este produto
destinam-se a profissionais destes serviços e não devem ser
utilizadas por outras pessoas.
• Risco de choques eléctricos e ferimentos graves durante a
desmontagem e manutenção deste produto. Os profissionais
destes serviços devem estar avisados deste facto e tomar os
cuidados necessários.
Safety Information vii
4402-001
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 servei d’aquest producte.
El personal professional ha d’estar-ne assabentat i prendre les
mesures convenients.
viii Service Manual
4402-001
Safety Information ix
4402-001
Preface
This manual describes the Lexmark X73 Scan/Print/Copy (4402-
001) and contains maintenance procedures for service personnel
only. It is divided into the following chapters:
1. General Information contains a general description of the
printer and the maintenance approach used to repair it. Special
tools and test equipment are listed in this chapter, as well as
general environmental and safety instructions.
2. Diagnostic Information contains an error indicator table,
symptom tables, and service checks used to isolate failing field
replaceable units (FRUs).
3. Diagnostic Aids contains tests and checks used to locate or
repeat symptoms of scanner/printer/copier problems.
4. Repair Information provides instructions for making printer
adjustments and removing and installing FRUs.
5. Connector Locations uses illustrations to identify the
connector locations and test points on the printer.
6. Preventive Maintenance contains the lubrication specifications
and recommendations to prevent problems.
7. Parts Catalog contains illustrations and part numbers for
individual FRUs.
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4402-001
1. General Information
The Lexmark X73 machine is an electro-mechanical scanner,
printer, and copier that creates characters and graphics by
composing programmed patterns of ink dots using a printhead and
liquid ink. 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 cartridge 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 two directions from
either cartridge.
Power Consumption
• <6 Watts - power off and power to the printer
• 8 Watts - Idle Mode (power on - not printing)
• 21 Watts - Printing (average)
• 31 Watts - Printing (peak)
General Information 1-1
4402-001
Scanner Specifications
Scanner Type
Scan Modes
Flatbed, CCD
True Color:
48 Bit Internal (68.7 Billion Colors)
24 Bit External (16.7 Million Colors)
Gray Mode:
12 Bits Internal (4,096 Shades
of Gray)
8 Bits External (256 Shades of Gray)
Text/Line Art:
1 Bit Per Pixel
Scan Method
Scan Area
One Pass Scanning
8.5 X 11.7 inches
216 X 292 mm
Scan Resolution
Optical: 600 dpi (H) X 1200 dpi (V)
Interpolated: 9600 X 9600
1-2 Service Manual
4402-001
Operator Panel
Press this
button:
When you want to:
Setup
Adjust your copy and scan settings using the Scan &
Copy Control Program on your computer.
Color Copy
Black Copy
Scan
Make a color copy.
Make a black and white copy.
Press the scan button after selecting a Scan To
destination.
Scan To
Select a scan destination, such as To copy, To and e-
mail, To an application, To a file, or To fax.
Scan To E-mail
Scan an image or document and send with an e-mail
message.
Scan To Fax
Paper Feed
Power
Scan an image or document and send as a fax.
Load or eject a sheet of paper from the printer.
Turn the printer on or off.
General Information 1-3
4402-001
Maintenance Approach
The diagnostic information in this manual leads you to the correct
field replaceable unit (FRU) or part. Use the symptom index, service
checks, and diagnostic aids to determine the symptom and repair
the failure.
After you complete the repair, perform tests as needed to verify the
repair.
Abbreviations
B/M
Bill of Material
CCD
EOF
ESD
FPC
FRU
HVPS
LVPS
OEM
V ac
V dc
ZIF
Charged Coupled Device
End of Form
Electrostatic Discharge
Flat Printhead Cable
Field Replaceable Unit
High Voltage Power Supply
Low Voltage Power Supply
Original Equipment Manufacturer
Volts alternating current
Volts direct current
Zero Insertion Force
1-4 Service Manual
4402-001
2. Diagnostic Information
Start
Use the symptom tables, service checks, and diagnostic aids in
chapter three, to determine the printer failure.
Power-On Self Test (POST) Sequence
Press the power button to turn machine on.
• Power light turns on.
• Status light stays on for a second and turns off.
• The carrier moves to the left then returns to the right stopping at
the maintenance station.
• Power light stays on.
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
4402-001
POST Symptom Table
Symptom
Action
No Power or
Status lights and go to the “Operator Panel Problems” on page 2-3.
no motors run.
Paper feed
gears do not
turn
Go to the “Paper Feed Service Check” on page 2-11.
move
page 2-6.
Carrier slams
side frame
Go to the “Carrier Transport Service Check” on
page 2-6.
CCD does not
move
Go to the “Gear Train Assembly Service Check” on
page 2-9.
CCD lamp does Go to the “CCD Module Assembly Service Check” on
not turn on page 2-8.
2-2 Service Manual
4402-001
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
Go to the “Carrier Transport
Service Check” on page 2-6.
• Carrier slams side frame
Maintenance Station Problems
Symptom
Action
Maintenance station:
Go to the “Maintenance Station
Service Check” on page 2-10.
• Fails to cap the printheads
• Fails to clean the printheads
Operator Panel Problems
Symptom
Action
• Buttons do not work
• Power or status lights do not
work
Check operator panel cable
connection at J6 on the system
board. Then run the “Power-On Self
Test (POST) Sequence” on
page 2-1. If operator panel fails,
If the problem still exists, replace the
system board. Go to the “System
Board Removal” on page 4-12.
Note: If any buttons or lights fail,
check connection J6. If the problem
remains, replace the operator panel
assembly. Go to the “Operator
Panel Removal” on page 4-4.
Diagnostic Information 2-3
4402-001
Printer Communication Table
Symptom
Action
• Not able to print Test Page
Check the USB cable and system
board cable connections. If okay,
replace system board. Go to the
“System Board Removal” on
page 4-12.
Scanner Problems
Symptom
Action
• CCD does not move
• Lamp does not light
Go to the “CCD Module Assembly
Service Check” on page 2-8.
Go to the “Gear Train Assembly
Service Check” on page 2-9.
• 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.
Go to the “Scan/Copy Quality
Service Check” on page 2-17.
• Blank copies.
2-4 Service Manual
4402-001
Paper Feed Problems
Symptom
Action
• Fails to pick paper
• Picks more than one sheet of
paper
Check” on page 2-11.
• 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
Check” on page 2-11.
Paper skews
Go to the “Paper Path Service
Check” on page 2-13.
Power Problems
Symptom
Action
No power in machine, motors do
not operate
Go to the “Power Service Check”
on page 2-14.
Print Quality Problems
Symptom
Action
• Voids in characters
• Light print
Go to the “Print Quality Service
Check” on page 2-15.
• Prints off the page
• Fuzzy print
• Carrier moves but no print
• Printhead dries prematurely
• Colors print incorrectly
• Vertical alignment off
• Ink smearing
• Vertical streaks on paper
• Print lines crowded
Go to the “Paper Feed Service
Check” on page 2-11.
Diagnostic Information 2-5
4402-001
Service Checks
Carrier Transport Service Check
FRU
Action
1
2
System Board
Check the transport carrier motor connector J4. If
connected, check for approximately 28 volts on
pins 1 and 2 or at the wire connections located on
the rear of the transport carrier motor. If voltage is
incorrect, replace the system board. If voltage is
correct, check the motor for shorts.
Carrier Transport
Motor
Carrier Transport
Motor
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 (J4)
to 10 ohms between the following pins on the
motor:
J4-1 and J4-2
If the readings are incorrect, replace the print
engine. Go to the “Print Engine Removal” on
page 4-11.
3
Carrier Guide Rod Clean the carrier rod.
Note: Lubricate the rod and the carrier rod bearing
surfaces with grease P/N 99A0394.
2-6 Service Manual
4402-001
FRU
Action
4
Encoder Strip
Check the encoder strip for proper installation.
Also, check it for wear, dirt and grease.
Carrier with PCB
Assembly
Be sure all printhead connectors are fully seated.
Check the cables for damage.
If the encoder strip and all connections are okay,
but the carrier still slams the side frame, replace
the print engine. Go to the “Print Engine
Removal” on page 4-11.
5
Carrier Transport
Belt
obstructions blocking carrier movement.
Idler Pulley Parts
Carrier Frame
Check the carrier belt idler pulley mounting screw.
Loosen the screw and allow the tension spring to
take up any slack in the belt. Tighten the screw. If
the pulley mounting bracket has reached the stop,
replace the belt. Go to the “Belt/Idler Pulley
Assembly (Print Engine) Removal” on
page 4-14.
Lubricate carrier to carrier frame engagement with
grease P/N 99A0394.
6
Printhead Carrier
Assembly
Disconnect the printer and check the carrier
good, remove the printhead carrier and check the
cable connection to the home sensor board. If the
problem remains, replace the system board. Go to
the “System Board Removal” on page 4-12.
7
8
Maintenance
Station
A problem with the maintenance station can cause
carrier movement problems at the right margin. Go
page 4-14.
Access Cover
Sensor
If the carrier does not move toward the cartridge
load position when the access cover is opened,
verify that power is on. If the carrier still does not
move, check connector J9 pin 1 for approximately
5 volts, with the cover closed. If the voltage is
correct, replace the sensor. Go to the “Access
Cover Sensor Removal” on page 4-6. If the
voltage is incorrect, replace the system board. Go
to the “System Board Removal” on page 4-12.
Diagnostic Information 2-7
4402-001
CCD Module Assembly Service Check
• The CCD (charged coupled device) Module will not move during
POST Test.
• The CCD lamp does not come on when CCD module assembly
moves.
FRU
Action
1
CCD Module Assembly
If CCD module will not move, go to
the “Gear Train Assembly Service
Check” on page 2-9.
Note: If the printer is not
connected to the PC and
Lexmark Scan and Copy Control
program is not opened, the CCP
lamp will not come on.
If lamp does not come on as CCD
module assembly is scanning or
moving, check connector (J7) on the
system board. If connected and the
lamp still does not work, replace the
CCD module assembly. If the lamp
does not correct the problem after
the CCD replacement, replace the
system board. See “System Board
Removal” on page 4-12 for more
information.
To unlock scanner, press the red
lever down. The lever is located by
the USB plug on the rear of the
machine.
Note: Unlock scanner before use.
2-8 Service Manual
4402-001
Gear Train Assembly Service Check
CCD will not move or scan.
FRU
Action
1
Gear Train Assembly
Disconnect J5 and check the reading
at pin 1 and 3 for approximately
225.5 ohms. If the reading is
incorrect, replace the gear train
assembly. Go to the “Gear Train
Assembly Removal” on page 4-6.
If the reading is correct, check at
pins 1 through 6 for approximately
28 volts, with the machine turned on.
If the voltage is incorrect, replace the
Board Removal” on page 4-12.
Note: Ensure scanner is unlocked.
2
Scanner Belt
Check the belt for proper installation.
If the belt is damaged, replace. Go to
the “Belt/Idler Pulley Assembly
(Print Engine) Removal” on
page 4-14.
Note: If not properly installed, the
belt will slip.
Diagnostic Information 2-9
4402-001
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 leaves the
maintenance station. The wiper cleans the
printhead only when the carrier is moving to the
left. There should be no wiping action of 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 needed. Go to the “Maintenance
Station Removal” on page 4-14.
Worn wipers cause degraded print quality just after
a maintenance cleaning. Check for loose or worn
wipers.
Worn caps cause the printhead nozzles to dry and
clog. Check for loose or worn caps.
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4402-001
Paper Feed Service Check
If your machine does not have paper jam problems, continue with
the service check. If your machine does have a paper jam problem,
examine it for the following before you begin the service check:
• Check the entire paper path for obstructions.
• Be sure there is not too much paper in the sheet feeder.
• Be sure the correct type of paper is being used.
• Check for static in the paper.
FRU
Action
1
System Board
Run the “Power-On Self Test (POST) Sequence”
on page 2-1. Replace parts as needed. To check
the paper feed motor, disconnect the paper feed
connector J3 and check for approximately 5 ohms
between pins 3 and 4. If the reading is incorrect,
replace the print engine. Go to the “Print Engine
Removal” on page 4-11. If the reading is correct,
replace the system board. Go to the “System
Board Removal” on page 4-12.
Diagnostic Information 2-11
4402-001
FRU
Action
2
Paper Feed Motor 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
With the paper feed motor cable J3 disconnected
from the system board, check for approximately 5
ohms between the following pins on the motor:
Pin 3 to Pin 4
If the readings are incorrect, replace the print
engine. Go to the “Print Engine Removal” on
page 4-11.
Although the paper feeds in a forward direction
only, the paper feed motor turns in two directions.
If the paper feed motor turns in one direction only,
replace the system board. Go to the “System
Board Removal” on page 4-12.
Binds in the paper feed motor or gear train can
cause intermittent false paper jam errors. Remove
the paper feed motor and check the shaft for binds.
Also check for a loose or worn motor gear.
3
4
Auto Sheet
Feeder Assembly
Check the pick roller for wear.
Mid Frame
Assembly
Check the following for wear:
• Small Feed rollers
• Large Feed roller
• Exit roller
• Star rollers
If any rollers need to be replaced, go to the “Print
Engine Removal” on page 4-11 and replace the
print engine.
5
End-of-Forms
Check for binds or damage.
Flag and Spring
2-12 Service Manual
4402-001
Paper Path Service Check
Examine the machine for the following before you begin this service
check:
• Check the entire paper path for obstructions.
• Be sure the correct type of paper is being used.
• Be sure the printer is installed on a flat surface.
FRU
Action
1
2
3
4
Large and Small
Feed Rollers
Check for wear and binds.
Small Feed Roller
Springs
Check for damage.
Auto Sheet
Feeder Assembly
Check the pick roller for wear.
Check the following for wear:
Mid Frame Asm
• Exit roller
• Star rollers
5
End-of-Forms
Flag
Check for binds or damage.
Diagnostic Information 2-13
4402-001
Power Service Check
FRU
Action
1
2
External Power
Supply
Plug the external power supply into an outlet.
Check for + 30 V dc. If voltage is incorrect, replace
the power supply.
Printhead Cable
Unplug the printer. Disconnect the printhead cable
Carrier Transport
Motor
change. Check the failing part for shorts and
replace as necessary.
Operator Panel
Repeat this procedure for the carrier transport
motor, paper feed motor, and operator panel.
3
System Board
If the symptom has not changed, replace the
system board. Go to the “System Board
Removal” on page 4-12.
2-14 Service Manual
4402-001
Print Quality Service Check
FRU / Function
Action
1
2
Printhead
Cartridge
Be sure the machine contains good print
cartridges.
Color Printhead
Cartridge Cross
Contamination
Cross contamination of color inks results in
incorrect colors printed, as when green prints for
yellow, (when yellow and blue are mixed in the
printhead cartridge). This problem resolves quickly
as the printhead cartridge is used.
If cross contamination occurs, check the following:
• The maintenance station wiper for damage.
• The printhead nozzle plate was resealed with
tape.
3
4
Printhead Carrier
Assembly
Reseat the printhead cable in the system board
and check the following parts for wear or damage:
• Printhead Cartridge Latch
• Latch Spring
• Carrier
System Board
Printhead Carrier
Assembly
Perform the “Test Page” on page 3-1. Look for a
break in the diagonal line of the nozzle test
pattern. A broken line indicates one or more print
verify the failure.
Check the gold-plated contacts on the end of the
printhead carrier cable for dirt, wear, and damage.
Use only a clean dry cloth to clean the contacts.
If the symptom remains, replace the system board.
Go to the “System Board Removal” on
page 4-12.
5
Maintenance
Station
Intermittent nozzle failures can be caused by worn
parts in the maintenance station. Go to the
“Maintenance Station Removal” on page 4-14,
and then return to this check.
Diagnostic Information 2-15
4402-001
FRU / Function
Action
6
Paper Feed
Ink smudging and smearing can be caused by
paper problems or problems in the paper feed
area.
Check the following:
• Correct type of paper is being used. Also check
the paper for curl or wrinkles.
• Feed rollers for wear, dirt, or looseness.
• Gears for wear or binds.
• Paper path for obstructions.
7
Carrier Transport
Blurred print and voids can be caused by problems
in the carrier transport area. Check the following:
• Carrier transport belt for wear.
• Carrier guide rod for wear or dirt. If dirty, clean
and lubricate.
• Carrier to carrier frame engagement should be
lubricated with grease P/N 99A0394.
• Idler pulley parts for wear, damage, or
looseness.
8
Alignment
Uneven vertical lines can be adjusted by
performing the printhead alignment adjustments.
The user is directed, through the Printer Control
program, to perform the printhead alignment
adjustments, when replacing a printhead cartridge.
2-16 Service Manual
4402-001
Scan/Copy Quality Service Check
FRU / Function
Action
1
Scanned images
are faded, or
colors are dull,
blurry or fuzzy.
Images are
Check the lighter/darker settings to see if it is
correct. There are two ways to make the
adjustment:
From the Lexmark Scan and Copy Control
program.
slanted or
crooked and the
straight lines in
the image appear
to be jagged or
uneven.
Check to see if there is any dust, debris on the
glass. This may cause a poor image.
Check the press plate on the scan lid for any dust
or debris.
2
Blank copies.
If there are blank copies, make sure the original
document is facing down on the scanner bed.
Check the print cartridges to see if they need to be
cleaned or replaced.
Check the paper type and copy quality settings on
the operator panel or Lexmark Scan and Copy
Control program.
Diagnostic Information 2-17
4402-001
2-18 Service Manual
4402-001
3. Diagnostic Aids
Test Page
This test prints the test page.
To run a complete test page of black and color patterns, be sure the
printhead cartridges are in good condition.
To enter the test:
1. Open the access cover.
2. Install a known good black print cartridge in the right side of the
carrier and a good color print cartridge in the left side.
3. Close the access cover.
4. Install paper in the sheet feeder.
5. Press and hold the paper feed button while pressing the power
button and releasing it.
6. Paper feeds into the printer.
7. The test page prints.
The test page consists of three color bars, nozzle purge pattern,
black purge pattern, black nozzle purge pattern and heater
checks.
Note: To stop test page, press the power button again.
purge pattern, black nozzle purge pattern and heater checks. The
purge pattern is used to clear all printhead nozzles. The nozzle test
pattern prints all nozzles on a diagonal line. There should be no
breaks in the nozzle test pattern. A break in the pattern indicates
one or more nozzles are not working.
If a print quality problem exists, see “Print Quality Service Check”
on page 2-15.
Diagnostic Aids 3-1
4402-001
3-2 Service Manual
4402-001
4. Repair Information
This chapter explains how to make adjustments to the printer and
how to remove defective parts.
Note: Read the following before handling electronic parts.
Handling ESD-Sensitive Parts
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 system
board:
• 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.
Repair Information 4-1
4402-001
Adjustments
The user is directed, in the Printer Control program, to perform the
printhead alignment adjustments after replacing a print cartridge.
Removal Procedures
The following procedures are arranged according to the name of the
printer part discussed.
CAUTION: Unplug the power cord before removing any parts.
Releasing Plastic Latches
Many of the parts are held in place with plastic latches. The latches
break easily; release them carefully. To remove such parts, press the
hook end of the latch away from the part to which it is latched.
4-2 Service Manual
4402-001
Operator Panel Removal
1. Remove the scanner lid.
2. Remove the rear cover.
3. Disconnect the operator panel cable from the system board.
4. Depress two latches on the left side of the operator panel.
5. Lift the operator panel and remove.
Top Housing Assembly Removal
1. Remove the scanner lid.
2. Remove the rear cover.
3. Disconnect the operator panel cable from the system board.
4. Remove the operator panel.
5. Remove two screws from the top housing.
6. Lift the right side of the housing.
7. Remove the top housing assembly.
Paper Support Removal
1. Open the paper support.
2. Depress the paper support at the hinge.
3. Remove the paper support.
4-4 Service Manual
4402-001
CCD Module Assembly Removal
1. Remove the rear cover.
2. Disconnect the CCD cable from the system board.
3. Remove the top housing assembly.
4. Depress the shaft retainer [A].
5. Lift and remove the shaft.
6. Remove the belt from pulleys.
7. Lift and remove the CCD module.
Repair Information 4-5
4402-001
Gear Train Assembly Removal
1. Remove the CCD module assembly.
2. Disconnect the gear train assembly cable from the system
board.
3. Remove two screws [A].
4. Lift and remove the gear train assembly.
Access Cover Sensor Removal
1. Remove the top housing assembly.
2. Disconnect the access cover sensor cable (J9) from the system
board.
3. Remove the sensor screw [B].
4. Remove the sensor. Note routing of cables.
4-6 Service Manual
4402-001
Middle Frame Removal
1. Remove the scanner lid assembly.
2. Remove the rear cover.
3. Remove the top housing assembly.
4. Disconnect the operator panel and CCD cables from the system
board.
5. Remove left and right covers.
6. Remove the operator panel assembly.
7. Remove the two screws [A].
Repair Information 4-9
4402-001
8. Depress the two clips [B] and slide the middle frame forward to
remove.
4-10 Service Manual
4402-001
Print Engine Removal
1. Remove the rear cover.
2. Remove the top housing assembly.
3. Remove the left cover.
4. Remove the right cover.
5. Remove the middle frame.
6. Move carrier to the center.
7. Remove three screws [B].
8. Slide the print engine forward and remove.
Repair Information 4-11
4402-001
ASF Module Removal
1. Remove the print engine.
2. Remove three screws [A].
3. Remove the ASF module.
System Board Removal
1. Remove the print engine.
2. Remove the ASF module.
3. Disconnect the transport and paper feed motor cables from the
system board.
4. Remove the four screws.
5. Remove the system board.
WARNING: When removing the system board, use care not to
damage the EOF flag.
4-12 Service Manual
4402-001
Carrier Removal
1. Remove the rear cover.
2. Remove the top housing Assembly.
3. Remove the left and right covers.
4. Disconnect the carrier cable from the system board.
5. Loosen the set screw on the carrier belt tensioner.
6. Depress the belt tensioner and remove the belt from the
transport carrier motor gear.
7. Remove both retainer clips from the carrier shaft.
8. Remove the shaft and carrier.
Note:
– Keep dirt and grease off of the encoder strip.
– Obsesrve orientation of the encoder strip to the sensor,
located on the rear of the carrier.
– Be careful not to damage the encoder strip when reinstalling
the carrier.
Encoder Strip Removal
1. Remove the carrier assembly.
2. Depress the encoder strip clip.
3. Remove the encoder strip.
Repair Information 4-13
4402-001
Maintenance Station Removal
1. Remove the middle frame assembly.
2. Remove the print engine.
3. Depress the two clips [A].
4. Remove the maintenance station.
Belt/Idler Pulley Assembly (Print Engine) Removal
1. Remove the middle frame.
2. Slide the carrier to the left.
3. Loosen the belt tensioner adjuster screw.
4. Depress the belt tensioner and remove the belt from the pulley.
5. Depress the latch.
6. Slide the belt tensioner to the right and remove.
4-14 Service Manual
4402-001
5-2 Service Manual
4402-001
6. Preventive Maintenance
This chapter contains the lubrication specifications. Follow these
recommendations to prevent problems and maintain optimum
performance.
Lubrication Specifications
Lubricate only when parts are replaced or as needed, not on a
scheduled basis. Use grease P/N 99A0394 to lubricate the following:
• All gear mounting studs.
• The left and right ends of the large feed roller at the side frames.
• The carrier to carrier frame engagement.
• The carrier guide rod, and carrier guide rod bearings.
WARNING: Keep the grease from coming into contact with any
electrical components, may cause printer damage or failure. Do not
lubricate the scanner rod or bearing after replacing.
Preventive Maintenance 6-1
4402-001
6-2 Service Manual
4402-001
7. Parts Catalog
How to Use This Parts Catalog
• SIMILAR ASSEMBLIES: If two assemblies contain a majority of
identical parts, they are shown on the same list. Common parts
are shown by one index number. Parts peculiar to one or the
other of the assemblies are listed separately and identified by
description.
• NS: (Not Shown) in the Asm-Index column indicates that the
part is procurable but is not pictured in the illustration.
• PP: in the parts description column indicates the part is
available in the listed parts packet.
• NA: Not available as a FRU.
Parts Catalog 7-1
4402-001
Assembly 1: Covers
Asm- Part
Index Number
Units Description
1–1
–2
12G6141
12G6140
12G6138
12G6135
12G6133
12G6175
12G6134
12G6156
7366857
1
1
1
1
1
1
1
4
1
Cover Assembly, Rear
Felt Pad Assembly
Base Assembly
Cover, Right
–3
–4
–5
Cover, Access with Latch
Paper Exit Tray
Cover, Left
–6
–7
NS
NS
Screws (PP)
Plain package B/M includes: Carton, Cushion
Set, Sealing Tape
Parts Catalog 7-3
4402-001
Assembly 1 (cont.): Covers
7-4 Service Manual
4402-001
Assembly 2: Paper Feed, Frame and Carrier Transport
Asm- Part
Units Description
Index Number
2–1
–2
12G6121
12G6120
12G6151
12G6123
12G6149
12G6154
12G6153
1
1
1
1
1
1
1
ASF Module
Printing Engine
–3
Encoder Strip with Clip
Idler Pulley Assembly
Belt, Carrier
–4
–5
–6
Maintenance Station Assembly
EOF Flag with Spring
NS
Parts Catalog 7-7
4402-001
Assembly 3: Electronics
3–1
NS
NS
–2
12G6177
12G6124
12G6176
12G6125
12G6172
12G6173
12G6170
12G6137
12G6128
12G6157
12G6158
1
1
1
1
1
1
1
1
1
1
1
CCD Module Assembly with Cable
CCD Module Assembly
CCD Cable
Gear Train Assembly
–3
Operator Panel Assembly
Operator Panel Overlays
Board, System
NS
–4
–5
Sensor, Access Cover
Power Supply (LV) 100–127
Power Supply (HV) 220–240
Power Supply – Japan 100V
–6
NS
NS
Parts Catalog 7-9
4402-001
7-10 Service Manual
4402-001
Index
Problems
Operator Panel 2-3
Paper Feed 2-5
A
Abbreviations 1-4
Adjustments 4-2
B
Black Copy button 1-3
Button
Black Copy 1-3
Color Copy 1-3
Paper Feed 1-3
Power 1-3
Scan 1-3
Scan To 1-3
Scanner 2-4
Scan To E-mail 1-3
Scan To Fax 1-3
Setup 1-3
R
Removals
Access Cover 4-7
ASF Module 4-12
C
Color Copy button 1-3
Connector Locations 5-1
Belt/Idler Pulley Assembly 4-14
Carrier 4-13
Encoder Strip 4-13
Gear Train Assembly 4-6
E
ESD-Sensitive Parts 4-1
L
Maintenance Station 4-14
Middle Frame 4-9
Lubrication Specifications 6-1
M
Maintenance Approach 1-4
O
Operator Panel 1-3
Top Housing Assembly 4-4
P
Paper Feed button 1-3
Parts Catalog 7-1
Carrier Transport 7-6
Covers 7-2
Electronics 7-8
Frame 7-6
Paper Feed 7-6
I-1
4402-001
S
Safety Information 1-v
Scan button 1-3
Scan To button 1-3
Scan To E-mail button 1-3
Scan To Fax button 1-3
Service Checks
Carrier Transport 2-6
CCD Module Assembly 2-8
Gear Train Assembly 2-9
Paper Feed 2-11
Paper Path 2-13
12G6120 7-7
12G6126 7-5
12G6134 7-3
12G6137 7-9
12G6138 7-3
12G6141 7-3
12G6149 7-7
12G6150 7-5
12G6151 7-7
12G6153 7-7
12G6154 7-7
12G6156 7-3
12G6157 7-9
12G6158 7-9
12G6170 7-9
12G6171 7-5
12G6172 7-9
12G6173 7-9
12G6174 7-5
12G6175 7-3
12G6176 7-9
12G6177 7-9
7366857 7-3
Power 2-14
Print Quality 2-15
Setup Button 1-3
Specifications
Scanner 1-2
Start 2-1
Symptom Table (POST) 2-2
Symptom Tables 2-3
T
Test Page 3-1
I-2 Service Manual
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