User`s guide

Identifying and Isolating Problems
5-6
Troubleshooting
5
Black spots appear on the front and back of the printed pages
Cause The fixing roller inside the fixing unit may be dirty.
Remedy Clean the fixing roller. (See Chapter 5, “Routine Maintenance,” in the Reference
Guide.)
Black stripes appear on multiple sheets in sequence.
Cause The toner cartridge is old or damaged.
Remedy Contact your local authorized Canon dealer.