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User’s Manual 6-9
SOLVING
PROBLEMS
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.
Due to dirty corona wire
Too light White vertical line Ghost printing
Due to dirty precharger wire
Black vertical line Toner stains (back)
Due to both
Smudging
Blurred black vertical line
Due to expired fuser unit
Print Quality Problems
Print Quality
Problems
Blurred black vertical line
Due to expired fuser unit