Canon CP660 Service Manual page 305

8 The print has horizontal bands/lines (main scanning direction).
Cause Step
Photosensitive 1
unit
Upper fixing 2
roller
9 The print has white bands/lines (horizontal; main scanning direction).
Cause Step
Photosensitive 1
unit
Intermediate 2
transfer drum
unit
10 The print has a missing color (specific).
Cause Step
Toner cartridge 1
Toner level 2
detection
COPYRIGHT © 1999 CANON INC.
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Checks
Are there scratches in the horizontal
direction (main scanning direction)
of the photosensitive drum?
Are there scratches in the horizontal
direction (main scanning direction)
of the upper fixing roller?
Checks
Are there scratches in the horizontal
direction (main scanning direction)
of the photosensitive drum?
Are there scratches in the horizontal
direction (main scanning direction)
of the intermediate transfer drum?
Checks
Remove the toner cartridge, and
turn on the power. If the printer unit
starts up normally, check each of
the toner cartridges in question. Is it
faulty?
Is the missing color black?
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
YES Replace the photosen-
sitive drum cartridge.
YES Replace the upper fix-
ing roller.
Yes/No Action
YES Replace the photosen-
sitive drum.
YES Replace the intermedi-
ate transfer drum unit.
Yes/No Action
YES Replace the problem
cartridge.
YES See IV.B.19."The black
toner cartridge is
empty."
NO See IV.B.17."The color
toner cartridge is
empty."
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