Canon PIXMA MP760 Service Manual page 92

No Function Phenomenon
*
8 C Print results Scratches on paper
*2 Location to clean in servicing when soiling on paper in automatic duplex printing persists:
BOTTOM CASE UNIT
* Occurrence level:
A: The symptom is likely to occur frequently. (Caution required)
B: The symptom may occur under certain conditions, but likeliness is assumed very low in practical usage.
C:The symptom is unlikely to be recognized by the user, and no practical issues are assumed.
Condition
-PP-101D, PP-101, PR-101, -Paper is scratched.
SG-101, etc. -Marks appear on printed
-Paper feeding from the cassette paper.
-Multiple number of sheets
loaded
2 - 11
Cause Corrective action
-Change the paper feeding method
from the cassette to the auto sheet
feeder.
-If automatic duplex printing is
performed, cancel it, and, by
setting only a single sheet of paper
in the auto sheet feeder, manually
print each side of paper.
SHEET FEED UNIT
Possible call or complaint
Scratches on the PF
return lever due to paper
feeding from the cassette,
and duplex printing path.