Lexmark MX931 - Page 344

Action Yes No
Step 3
a Remove, and then insert the imaging unit.
Warning—Potential Damage: Do not expose the imaging unit
to direct light. Extended exposure to light can cause print
quality problems.
Warning—Potential Damage: Do not touch the
photoconductor drum. Doing so may aect the quality of
future print jobs.
b Print the document.
Do vertical dark lines or streaks appear on prints?
Go to step 4. The problem is
solved.
Step 4
a Replace the imaging unit.
b Print the document.
Do vertical dark lines or streaks appear on prints?
Contact
customer
support.
The problem is
solved.
Vertical dark streaks with print missing
Note: Before solving the problem, print the Print Quality Test Pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
Action Yes No
Step 1
a Remove the printhead wiper, and then clean the printhead lens.
b Print the document.
Do vertical dark streaks with missing images appear on prints?
Go to step 2. The problem is
solved.
Troubleshoot a problem 344