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Action Yes No
Step 1
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
aect 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?
Go to step 2. The problem is
solved.
Step 2
a Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note: If the toner cartridge is not supported, then install a
supported one.
b Print the document.
Do vertical dark streaks with missing images appear on prints?
Contact
customer
support.
The problem is
solved.
Troubleshooting 243
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