Lexmark 4039 - B/W Laser Printer, Service Manual

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Diagnostic Aids
41
4039-1XX
LCD Test
To test the operator panel display:
1. Enter Diagnostics mode
2. Select [LCD Test].
3. Select [Single] or [Continuous].
4. The display goes through a continuous sequence of turning pels
on and off.
5. Press Return to stop continuous LCD test.
6. Press Return to return to the Diagnostics mode main menu.
Page Count
To view or set the page count:
1. Enter Diagnostics mode.
2. Select [Page Count].
3. Choose any number between 0000000 and 9999999 by
Selecting [NEXT] to move the cursor under each digit. Then
select [+] OR [-] to select the number you want in each digit.
4. Select [SAVE] to save the page count displayed.
Paper Feed Test
This test allows you to observe the drive gear train and feed paper
through the printer to check for broken gear teeth, watch the paper
path, or check the erase lamps.
Note: You may want to remove the gear cover before starting this
test so you can observe the motor gears.
1. Enter Diagnostics mode.
2. Select [Paper Feed].
3. Select [Tray 1], [Tray 2], or [Manual].
4. Select [Single] or [Continuous].
5. Select [CANCEL] to stop continuous mode.
6. Press Return to return to Diagnostics mode main menu.