The Copy Has A Soiled Back - Canon NP6251 Service Manual

13. The copy has a soiled back.

Cause Step
1
Developing 2
assembly
Cleaner
assembly
Fixing assembly 3
Delivery
assembly
COPYRIGHT © 1997 CANON INC.
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Checks
Turn off the power switch while
copy paper is moving through the
feeding assembly. At this time, is
the back of the paper soiled?
Does the problem occur at
intervals of about 52 mm?
Is the take-up mechanism of the
fixing cleaning belt and the
cleaning mechanism of the upper
roller normal?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO Action
NO Go to step 3.
YES 1. Clean the registration
roller.
2. Clean the transfer
guide.
3. Check the developing
assembly for leakage
of toner.
NO 1. Clean the feeding
assembly.
2. Check the cleaner
assembly for leakage
of toner.
NO 1. Check the take-up
mechanism of the
cleaning belt.
2. Clean the upper roller
and the lower roller.
3. Clean the fixing
assembly inlet guide.
YES Clean the delivery roller
and the separation
claws.
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