Lexmark CS921 User Manual page 103

Troubleshooting
Action
Step 4
a
Inspect the test pages to determine which color is affected.
b
Remove, and then reinstall the photoconductor unit and the
toner cartridge.
Warning—Potential Damage: Do not expose the
photoconductor unit to direct light for more than one minute.
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.
c
Print the document.
Does gray or colored background still appear on prints?
Horizontal dark lines
ABCDE
ABCDE
ABCDE
Notes:
•
Before solving the problem, print the print quality test pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
•
If horizontal dark lines keep appearing on your prints, then see the "Repeating defects" topic.
Action
Step 1
a
Depending on your operating system, specify the tray or feeder
from the Printing Preferences or Print dialog.
b
Print the document.
Do horizontal dark lines still appear on prints?
Yes No
Contact customer The problem is
support. solved.
Yes No
Go to step 2. The problem is
solved.
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