When printing, there are visible dark or light vertical line(s), streak(s), or void(s) on the paper.
Only one color affected
Dark band of toner
Select Status/Supplies icon on the printer Control Panel. Replace any supplies that are low or empty.
Print the Print Quality Pages from the printer Control Panel.
Run the Clean Sensing and Laser Option function. This will run the wipers through the cleaning cycles to eliminate any contamination on the printhead.
Print another set of Print Quality pages.
LEGACY ID: SO7796
Correctly installing the imaging unit or imaging kit can help remove the vertical dark lines you see on your prints.
Are you seeing vertical white lines on your prints? Check if the imaging unit or imaging kit is properly installed.