Action Yes No
Step 2
a Load paper from a fresh package.
Note: Paper absorbs moisture due to high humidity. Store
paper in its original wrapper until you use it.
b Print the document.
Do vertical dark lines appear on prints?
Go to step 3. The problem is
solved.
Step 3
a Remove the color imaging kit, and then remove the black
imaging unit.
Warning—Potential Damage: Do not expose the color
imaging kit and black 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 color imaging kit and black
imaging unit. Doing so may aect the quality of future print
jobs.
b Insert the black imaging unit, and then insert the color imaging
kit.
c Print the document.
Do vertical dark lines appear on prints?
Contact
customer
support.
The problem is
solved.
Horizontal white lines
Notes:
• Before solving the problem, print the Print Quality Test Pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
• If horizontal white lines keep appearing on the prints, then see the “Repeating defects” topic.
Troubleshoot a problem 199
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