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Action Yes No
Step 3
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 control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages. For non‑touch‑screen printer models, press
to
navigate through the settings.
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.
Troubleshooting 121
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