Canon GP215 Service Handbook page 45

5 The copy has vertical fogging.
6 The copy has black lines. (vertical, thick, fuzzy)
Cause Step
Primary charg- 1
ing roller
Scanner (dirty) 2
Developing 3
assembly
Photosensitive 4
drum
Light (from out-
side)
Checks
Clean the charging roller in
user mode. Is the problem cor-
rected?
Clean the mirror, lens, and
dust-proofing glass. Is the
problem corrected?
Is the toner coating on the
developing cylinder even?
Are there scratches on the pho-
tosensitive drum in peripheral
direction?
TROUBLESHOOTING IMAGE PROBLEMS
Yes/No
YES End.
YES End.
NO 1. Check the edge of the
developing assembly blade.
2. Dry wipe the surface of the
developing cylinder.
YES Replace the drum unit.
NO Check the photosensitive drum
to see if it should be exposed
to light from outside.
Action
3–9