QMS DeskLaser 1600 User Manual
5-11
The most common cause of poor print quality is the dirty corona
wire or precharger wire. A rare cause is the expired fuser unit. The
figures below show the typical appearances.
Too light
White vertical line
Ghost printing
Black vertical line
Toner stains (back)
Too light
White vertical line
Ghost printing
Clear black vertical line
Toner stains (back)
Smudging
Due to dirty corona wire
Due to dirty precharger wire
Due to both
Print Quality
Problems
Blurred black vertical line
Due to expired fuser unit
