Lexmark MX-B468F User Manual page 231

Troubleshoot a problem
Action
Step 5
a
Replace the imaging unit.
b
Print the document.
Do vertical dark lines or streaks appear on prints?
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
Step 1
a
Check if the printer is using a genuine and supported toner
cartridge.
Note: If the cartridge is not supported, then install a
supported one.
b
Print the document.
Do vertical dark streaks with missing images appear on prints?
Step 2
a
Remove the imaging unit.
Warning—Potential Damage: Do not expose the imaging unit
to direct light for more than 10 minutes. Extended exposure
to light may cause print quality problems.
Warning—Potential Damage: Do not touch the
photoconductor drum under the imaging unit. Doing so may
affect the quality of future print jobs.
b
Remove any packing material that is stuck on the imaging unit.
Note: Make sure to remove any obstruction between the
charge roller and photoconductor drum.
c
Insert the imaging unit.
d
Print the document.
Do vertical dark streaks with missing images appear on prints?
Yes No
Contact your dealer. The problem is
solved.
Yes No
Go to step 2. The problem is
solved.
Contact your dealer. The problem is
solved.
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