Lexmark 4021 User Manual page 230

Troubleshooting
Action
Step 2
From the control panel, set the paper texture, type, and weight in
the Paper menu to match the paper loaded in the tray.
Do the paper texture, type, and weight match the paper in the tray?
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
Resend the print job.
Do streaked vertical lines appear on prints?
Step 4
a
Remove, and then reinstall the photoconductor unit.
1
Remove the photoconductor unit.
Warning—Potential Damage: Do not expose the
photoconductor unit to direct light for more than 10
minutes. Extended exposure to light may cause print
quality problems.
2
Install the photoconductor unit.
b
Resend the print job.
Do streaked vertical lines appear on prints?
Step 5
a
Clean the charger and the printhead lens.
b
Resend the print job.
Do streaked vertical lines appear on prints?
Step 6
Replace the photoconductor unit, and then resend the print job.
Do streaked vertical lines appear on prints?
Yes No
Go to step 3. Do one or more of
the following:
Go to step 4. The problem is
solved.
Go to step 5. The problem is
solved.
Go to step 6. The problem is
solved.
Contact customer The problem is
support. solved.
230
•
Specify the paper
texture, type, and
weight from the
tray settings to
match the paper
loaded in the tray.
•
Change the
paper loaded in
the tray to match
the paper
texture, type, and
weight specified
in the tray
settings.