Lexmark MX931 MFP User Manual page 342

Troubleshoot a problem
Action
Step 4
a
Remove, and then insert the imaging unit.
Warning—Potential Damage: Do not expose the imaging unit
to direct light. Extended exposure to light may cause print
quality problems.
Warning—Potential Damage: Do not touch the
photoconductor drum. Doing so may affect the quality of
future print jobs.
b
Print the document.
Does gray background appear on prints?
Step 5
a
Update the printer firmware. For more information, see the
"Updating firmware" section.
b
Print the document.
Does gray background appear on prints?
Step 6
a
Replace the imaging unit.
b
Print the document.
Does gray background appear on prints?
Incorrect margins
Action
Step 1
a
Adjust the paper guides in the tray to the correct position for
the paper loaded.
b
Print the document.
Are the margins correct?
Yes No
Go to step 5. The problem is
solved.
Go to step 6. The problem is
solved.
Contact customer The problem is
support. solved.
Yes No
The problem is Go to step 2.
solved.
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