Canon CP660 Service Manual page 350

CHAPTER 10 TROUBLESHOOTING
4 Wrinkles (duplexing mode)
Cause Step
Feeding roller 1
assembly,
Horizontal reg-
istration guide
Roller (inside 2
the duplexing
unit)
Paper guide 3
10-68
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Checks
Is the feeding roller assembly or the
horizontal registration guide coated
with paper lint or dust?
Is any of the rollers inside the
duplexing unit worn or deformed?
Check the paper feeding path. Is the
paper guide scratched or deformed?
Yes/No
YES
YES
YES
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Clean the problem part.
Replace any worn or
deformed roller.
Replace the scratched
or deformed guide.