Lexmark ST9820 User Manual page 102

Troubleshooting
Horizontal light bands
Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages. For non‑touch‑screen printer models, press
navigate through the settings.
Action
a
Check if the printer is using a genuine and supported toner
cartridge.
Note: If the cartridge is not supported, then install a
supported one.
b
Print the document.
Do horizontal light bands appear on prints?
Incorrect margins
Action
Step 1
a
Adjust the paper guides to the correct position for the paper
loaded.
b
Print the document.
Are the margins correct?
Yes No
Contact customer The problem is
support. solved.
Yes No
The problem is Go to step 2.
solved.
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