Notes:
• Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages.
• Use tray 1 to print the sample pages and make sure that paper is loaded in the portrait orientation.
• If horizontal white lines keep appearing on the prints, then see “Repeating defects” on page 467.
Try one or more of the following:
• Depending on your operating system, specify the paper type from the Printing Preferences or Print
dialog. Make sure that the setting matches the paper loaded in the tray.
Note: You can also change the setting on the printer control panel. Navigate to Settings > Paper >
Tray Configuration > Paper Size/Type.
• Load the specified paper source with the recommended paper type.
• Make sure that the imaging kit and black imaging unit are properly installed.
1 Remove the imaging kit, and then remove the black imaging unit.
Warning—Potential Damage: Do not expose the photoconductor drum to direct light.
Extended exposure to light may cause print quality problems.
Warning—Potential Damage: Do not touch the photoconductor drums. Doing so may aect
the quality of future print jobs.
2 Insert the black imaging unit, and then insert the imaging kit.
If the problem persists, then contact
customer support.
Vertical white lines
Notes:
• Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings > Troubleshooting > Print Quality Test Pages.
• Use tray 1 to print the sample pages and make sure that paper is loaded in the portrait orientation.
Try one or more of the following:
• Depending on your operating system, specify the paper type from the Printing Preferences or Print
dialog. Make sure that the setting matches the paper loaded in the tray.
Note: You can also change the setting on the printer control panel. Navigate to Settings > Paper >
Tray
Configuration
> Paper Size/Type.
• Check if you are using the recommended paper type.
Be sure to load the specified paper source with the recommended paper type.
Troubleshoot a problem 466