Lexmark C540N Service Manual

2-56 Service Manual
5025-2xx, 4xx
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Trays 2 and 3 (optional) service check
5
1. Turn off the printer
2. Remove the rear shield. See “Top cover
assembly removal” on page 4-13.
3. Disconnect the cable at JTRAY1 connector
for tray1 or JOPT1 for tray 2 and 3 on the
controller board.
4. Turn the printer on, and measure the
voltages below:
Are the voltage values approximately correct?
Problem resolved. Replace the controller
board. See “Controller
board removal” on
page 4-20.
Step Questions / actions Yes No
1 Are two option trays being used? Go to step 2. Go to step 4.
2
If two option trays are being used, is the 550
sheet tray on the bottom?
Go to step 4. Go to step 3.
3
Switch the order of the trays so the 500 sheet
tray is on the bottom, and print a page from
both trays.
Did the pages print from both trays?
Problem resolved. Go to step 4.
4
Inspect the paperfeed pick tires on the tray that
fails to pick.
Do they appear worn or damaged.
Go to step 5. Go to step 6.
5
Replace the pick tires on the faulty tray, and
print a page with media from the affected tray.
See “Pick tires removal” on page 4-68.
Did the page print?
Problem resolved. Go to step 6.
6
Check the option cable connected to JOPT1
for continuity.
Is there continuity?
Go to step 8. Go to step 7.
7
Replace the cable, and print from both option
trays.
Did the pages print from both trays?
Problem resolved. Go to step 8.
Step Questions / actions Yes No
JOPT1 for tray 2
or 3
Pin Voltage
2 Ground
3 Ground
5 +24V
6 Ground
7 +5V
9 Ground
10 Ground
JTRAY1 for tray 1
Pin Voltage
1 +5 V dc
2 +5 V dc
3 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.