Lexmark X940e Owners Manual

Diagnostic aids3-1
7510
Go Back Previous
Next
3.  Diagnostic aids
This chapter explains the tests and procedures to identify printer failures and to verify that repairs have 
corrected the problem.
Accessing service menus
Access the following menus to identify problems with the printer and run diagnostic tests.
Diagnostics Menu 1. Turn off the printer.
2. Press and hold the 3 and 6 
buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 
seconds.The Diagnostics Menu group...

3-2Service Manual 7510
Go Back Previous
Next
Diagnostics Menus
Entering Diagnostics Menus
1. Turn off the printer.
2. Press and hold the 3 and 6 buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 seconds.
Available tests
Tests appear on the LCD in the order shown:
MOTOR TESTSSee “MOTOR TESTS” on page 3-6.
Finisher Motor Tests
Motor (entrance/paddle) 
Motor (buffer/transport) 
Motor (exit) 
Fin diverter solenoid
Sub paddle solenoid 
Media eject clutch 
Media eject clamp motor...

Diagnostic aids3-3
7510
Go Back Previous
Next
Bridge unit bin media exit solenoid
Printer Motor Tests
Transfer belt steering motor
CMY PC cartridge drive motor 
K PC cartridge drive motor
Printhead polygon mirror motor
Registration clutch 
Tray 1 media feed/lift motor
Tray 2 media feed/lift motor
Tray 3 media feed/lift motor
Tray 4 media feed/lift motor
2nd transfer roll retract motor 
K developer/transport motor
MPF pick solenoid 
MFP/transport drive motor 
Duplex drive motor 
Inverter clutch 
Duplex...

3-4Service Manual 7510
Go Back Previous
Next
PRINT TESTSSee “PRINT TESTS” on page 3-7.
Tray 1
Tray 2
Tray 3
Tray 4
MP Feeder
Printing Quality Test Pages
See “Print Quality Test Pages” on page 3-7.
HARDWARE TESTS
Panel Test
See “Panel Test” on page 3-8.
Button TestSee “Button Test” on page 3-8.
DRAM TestSee “DRAM Test” on page 3-9.
CACHE TestSee “CACHE Test” on page 3-9.
DUPLEX TESTS
Quick Test See “Quick Test” on page 3-9.
Sensor Test See “Sensor Test (duplex)” on page 3-10.
INPUT TRAY TESTS
Feed Tests...

Diagnostic aids3-5
7510
Go Back Previous
Next
Model Name See “Model Name” on page 3-19.
Configuration ID See “Configuration ID” on page 3-19.
EVENT LOG
Display Log  See “Display the Event Log” on page 3-21.
Print Log See “Print the Event Log” on page 3-22.
Clear Log See “Clear the Event Log” on page 3-22.
SCANNER TESTS
ASIC Test See “ASIC Test” on page 3-23.
Feed Test See “Feed Test” on page 3-23.
Scanner Manual Registration See “Scanner Manual Registration” on page 3-24.
Sensor Tests See “Sensor Test...

3-6Service Manual 7510
Go Back Previous
Next
MOTOR TESTS
The tests in this group allow you to test specific motors, and on some motors run them forward or reverse.
To run the MOTOR TESTS:
1. Touch MOTOR TESTS from the Diagnostics Menu.
2. Touch the test to run. 
3. During the test, Motor Running... appears on the LCD.
Note:  If available, Forward and Reverse options appear on the LCD for selected tests.
Press Stop  to stop the test.
The following Finisher Motor Tests are available:
• Motor...

Diagnostic aids3-7
7510
Go Back Previous
Next
PRINT TESTS
To run the Print Tests:
1. Touch PRINT TESTS from the Diagnostics Menu.
2. Touch [Input Source] to verify that the printer can generate output from that source’s media.
3. Touch Printing Quality Test Pages to view information about the printer’s current settings and to test the 
printer’s ability to generate quality output.
4. Touch Single or Continuous. 
•If Single is selected, a single page is printed.
•If Continuous is selected, printing...

3-8Service Manual 7510
Go Back Previous
Next
HARDWARE TESTS
Touch the following Hardware Tests from this menu:
•Panel Test
•Button Test
•DRAM Test
•CACHE Test
Panel Test
This test automatically toggles all pixels on the LCD through every contrast level beginning with the darkest to 
the brightest. This test shows non-functioning pixels as blank spaces during the darkest contrast. 
This test continues until you press Stop  , then the LCD returns to HARDWARE TESTS.
Button Test
The Button Test is used to...

Diagnostic aids3-9
7510
Go Back Previous
Next
DRAM Test
The DRAM Test is used to check the validity of both the printer’s standard and optional DRAM. The test involves 
writing patterns of data to DRAM to verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
1. Touch HARDWARE TESTS from the Diagnostics Menu.
2. Touch DRAM Test. DRAM Test Testing... appears on the LCD, and then Resetting the Printer 
appears. The printer automatically performs a POR. 
The following type of...

3-10Service Manual 7510
Go Back Previous
Next
Make sure either letter or A4 size paper is loaded in the default paper source. If the default source only supports 
envelopes, then the Quick Test will be printed from Tray 1.
To run the Quick Test:
1. Touch DUPLEX TESTS from the Diagnostics Menu.
2. Touch Quick Test.
3. Touch Single or Continuous. Quick Test Printing... appears on the LCD.
•The single Duplex Quick test cannot be canceled.
•The printer attempts to print the Quick Test Page from the default...