The Back Of The Copy Is Soiled - Canon NP6218 Service Manual

13. The back of the copy is soiled.

Cause Step
Transfer
charging roller
Durm cartridge
Drum cleaning
assembly
(drum
cartridge)
Fixing
assembly
COPYRIGHT © 1997 CANON INC.
Checks
1 Turn off the power switch while
paper is moving through the
feeding assembly. Is the back of
the copy soiled?
2 Execute 'No. 403' in service mode
(transfer roller cleaning). Is the
problem corrected?
3 Make several solid white copies. Is
the problem corrected?
4 Is the transfer charging roller
soiled excessively?
5 Is the problem noted norizontally
at intervals of about 4.2 cm?
6 Is the problem noted vertically at
intervals of about 1.6 cm?
7 Is the fixing pressure roller or the
fixing film soiled with toner?
CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Results Action
NO Go to step 7.
YES End.
YES End.
YES Replace the transfer
charging roller.
YES 1. Clean the registration
roller and transfer
guide.
2. Check the drum
cartridge for leakage
of toner.
YES 1. Clean the manual
feed roller.
2. Check the drum
cartridge for leakage
of toner.
NO 1. Clean the cleaning
assembly.
2. Check the drum
cartridge for leakage
of toner.
YES Clean the fixing pressure
roller and the fixing film.
NO Clean the delivery roller
and the fixing assembly
paper guide plate.
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