Lexmark CS921 User Manual page 116

Troubleshooting
Vertical dark lines or streaks
Leading edge
ABCDE
ABCDE
ABCDE
Trailing edge
Note: Before solving the problem, print the print quality test pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
Action
Step 1
a
Depending on your operating system, specify the paper type,
texture, and weight from the Printing Preferences or Print
dialog.
Notes:
•
Make sure that the settings match the paper loaded in
the tray.
•
You can also change the settings on the printer control
panel.
b
Print the document.
Do vertical dark lines or streaks still appear on prints?
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 or streaks still appear on prints?
Step 3
a
Inspect the test pages to determine which color is affected.
b
Remove, and then reinstall the photoconductor unit.
Warning—Potential Damage: Do not expose the
photoconductor unit to direct light for more than one minute.
Extended exposure to light can cause print quality problems.
Warning—Potential Damage: Do not touch the
photoconductor drum. Doing so may affect the quality of
future print jobs.
c
Print the document.
Do vertical dark lines or streaks still appear on prints?
Yes No
Go to step 2. The problem is
solved.
Go to step 3. The problem is
solved.
Go to step 4. The problem is
solved.
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