Lexmark MX320 Series User Manual page 83

Troubleshooting
Action
Step 3
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 horizontal dark lines still appear on prints?
Step 4
a
Remove, and then reinstall 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. Doing so may affect the quality of
future print jobs.
b
Print the document.
Do horizontal dark lines still appear on prints?
Step 5
a
Replace the imaging unit.
b
Print the document.
Do horizontal dark lines still appear on prints?
Horizontal white lines
Leading edge
Trailing edge
Note: Before solving the problem, print the print quality test pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages.
Action
Step 1
a
Make sure that your software program is using a correct fill
pattern.
b
Print the document.
Do horizontal white lines still appear on prints?
Yes No
Go to step 4. The problem is
solved.
Go to step 5. The problem is
solved.
Contact customer The problem is
support. solved.
Yes No
Go to step 2. The problem is
solved.
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