Lexmark C540N Service Manual

Diagnostic information 2-31
5025-2xx, 4xx
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Fuser service check
5
Turn the printer on, and check the values at
JBIN1:
Are the values correct?
Replace the fuser exit
sensor. See “Fuser exit
sensor removal” on
page 4-36.
Replace the controller
board. See “Controller
board removal” on
page 4-20.
Step Questions / actions Yes No
1 Some low-voltage power supply FRUs have a
voltage selector switch. If it does, the switch
needs to be set to the correct voltage for your
area.
Has the LVPS been changed?
Check the switch on the
side of the LVPS to verify
the correct voltage is set.
Go to step 2.
2
Turn the printer off, and remove the rear
shield. See “Top cover assembly removal”
on page 4-13. Check the cable at JFUSES1
for proper connection to the controller board,
the cable for pinch points, and the cable or
connector for any other damage.
Is the cable damaged?
Replace the fuser cable. Go to step 3.
3
Check the connector JLVPS1 for proper
connection to the controller board, the cable
for pinch points, and the cable or connector for
any other damage.
Is the cable damaged?
Repair or replace the LVPS
cable.
Go to step 4.
4
Check the power cable on the left side of the
fuser and the thermistor cables and
connections on the right side of the fuser.
Are the cables or connectors damaged?
Repair the cables. If the
cables cannot be repaired,
replaced the fuser. See
“Fuser assembly
removal” on page 4-32.
Go to step 5.
Step Questions / actions Yes No
JBIN1
Pin Value
4 0 V dc (+5 V dc during cycle)
5 +0 V dc (unblocked), +3.3 V dc
(blocked)
6 Ground

Lexmark C540N Specifications

General

Print Technology	Laser
Print Resolution	1200 x 1200 dpi
Standard Paper Capacity	250 sheets
Input Capacity	250 sheets
Output Trays Capacity	150 sheets
Connectivity	USB, Ethernet
Processor	400 MHz
Standard Memory	128 MB
Network Ready	Yes
Warranty	1 Year
Printer Type	Laser
Recommended Monthly Volume	1500 - 3000 pages
Operating System Compatibility	Windows, Mac, Linux
Media Type	Card Stock, Envelopes, Labels, Plain Paper, Transparencies
Network	10/100 Base-TX Ethernet

Summary

Lexmark C54x Printer General Information

Lexmark Printer Print Quality

Discusses component wear and checking print quality settings.

Lexmark Printer Power and Electrical Specifications

Details power requirements and typical electricity consumption.

Lexmark Printer Diagnostic Information

Lexmark Printer Diagnostic Start

Guide to locating error codes, symptoms, and service checks for troubleshooting.

Lexmark Printer POR (Power-On Reset) Sequence

Describes the sequence of events during printer startup self-test.

Lexmark Printer Symptom Tables

Lists printer symptoms and corresponding actions for diagnosis.

Lexmark Printer Error Codes and Messages

Details user status, customer attendance, and error messages with explanations.

Lexmark Printer Paper Jam Messages (2xx)

Lists paper jam error codes, descriptions, and instructions for clearing jams.

Lexmark Printer Service Error Messages

Provides a list of service error codes for printheads, fuser, and software issues.

Lexmark Printer Diagnostic Aids

Lexmark Printer Accessing Service Menus

Explains how to access diagnostic and configuration menus for testing.

Lexmark Printer Diagnostics Menu (Diag Menu)

Outlines the structure and available tests within the Diagnostics Menu.

Lexmark Printer Registration

Details how to adjust print registration for proper alignment.

Lexmark Printer Alignment Procedure

Guides on aligning color planes for optimal print quality.

Lexmark Printer Transfer Roll Service Check

Provides steps to check the transfer roll for proper function.

Lexmark Printer Tray (x) Sensor Service Check

Lexmark Printer USB Service Check

Lexmark Printer Configuration Menu

Lexmark Printer Hardware Tests

Lexmark Printer Repair Information

Lexmark ESD-Sensitive Parts Handling

Provides essential precautions for handling electronic components safely.

Lexmark Printer Removal Procedures

General guidelines for disassembling printer components and handling FRUs.

Lexmark Printer Front Cover Assembly Removal

Lexmark Printer Left Cover Assembly Removal

Lexmark Printer Operator Panel Bezel and Name Plate Removal

Lexmark Printer Operator Panel Removal

Lexmark Printer Right Cover Assembly Removal

Lexmark Printer Top Cover Assembly Removal

Lexmark Printer Bin-Full/Narrow Media Sensor Removal

Lexmark Printer Controller Board Removal

Steps for removing the main controller board, a critical component.

Lexmark Printer Developer Unit Removal

Lexmark Printer Duplex Reference Edge Removal

Lexmark Printer Fuser Assembly Removal

Detailed steps for removing the fuser assembly.

Lexmark Printer Fuser Drive Motor Assembly Removal

Lexmark Printer Fuser Exit Sensor Removal

Lexmark Printer High-Voltage Power Supply (HVPS) Assembly Removal

Steps for removing the HVPS assembly.

Lexmark Printer Image Transfer Unit (ITU) Removal

Detailed procedure for removing the image transfer unit.

Lexmark Printer Paper Pick Motor Drive Assembly Removal

Lexmark Printer Printhead Removal

Steps for removing and replacing the printhead.

Lexmark Printer Toner Cartridge Contacts

Lexmark Printer Toner Density Sensor (TDS) Removal

Lexmark Printer Toner Meter Cycle (TMC) Card Removal

Lexmark Printer Tray Present Sensor Removal

Lexmark Printer USB Port Connector Removal

Lexmark Printer Waste Toner Bottle Removal

Lexmark Printer Wireless Network Antenna Removal

Lexmark Printer Wireless Network Card Removal

Lexmark Printer Connector Locations

Lexmark Printer Controller Board Diagram

Diagram showing the layout of connectors on the controller board.

Lexmark Printer Controller Board Connectors

Detailed pinout and signal information for controller board connectors.