Action Yes No
Step 4
Replace the imaging unit, and then print the document.
Do vertical dark lines appear on prints?
Contact
customer
support.
The problem is
solved.
Horizontal white lines
Notes:
• Before solving the problem, print the Print Quality Test Pages. From the home screen, touch Settings >
Troubleshooting > Print Quality Test Pages.
• If horizontal white lines keep appearing on the prints, then see the “Repeating defects” topic.
Action Yes No
Step 1
a Depending on your operating system, specify the paper type
from the Printing Preferences or Print dialog.
Notes:
• Make sure that the setting matches the paper loaded in
the tray.
• You can also change the setting on the printer control
panel. From the home screen, touch Settings > Paper >
Tray
Configuration
> Paper Size/Type.
b Print the document.
Do horizontal white lines appear on prints?
Go to step 2. The problem is
solved.
Step 2
a Load the specified paper source with the recommended paper
type.
b Print the document.
Do horizontal white lines appear on prints?
Go to step 3. The problem is
solved.
Troubleshooting 248
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