Feeding Faults; Double Feeding; Wrinkles - Canon NP6251 Service Manual

CHAPTER 11 TROUBLESHOOTING
B. Feeding Faults

1. Double Feeding

Cause Step
Separation 1
roller
Spring

2. Wrinkles

Cause Step
Pick-up 1
assembly
Copy paper 2
3
Paper guide 4
5
Lower roller 6
Upper/lower
roller
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COPYRIGHT © 1997 CANON INC.
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Checks
Is the separation roller deformed
or worn?
Checks
Turn off the machine while copy
paper is moving through the
feeding assembly. At this time, is
the copy paper wrinkled or is it
moving askew?
Try fresh copy paper. Is the
problem corrected?
Try Canon-recommended paper.
Is the problem corrected?
Is the paper guide soiled with
toner?
Is the height of the paper guide
correct?
Is the lower roller pressure (nip)
as specified?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO Action
YES Replace the separation
roller.
NO Replace the spring used
to pull the separation
roller.
YES/NO Action
YES Check the pick-up
assembly. Check the
registration roller.
YES The paper may be moist.
Advise the user on the
correct method of storage.
NO Advise the user to use
Canon-recommended
paper.
YES Clean the guide with
solvent.
NO Adjust the height of the
paper guide.
NO Adjust it.
NO Try replacing the upper
and lower rollers one
after the other.