Canon FY8-13EX-000, NP6218 service manual Back of the copy is soiled, 10-57

CHAPTER 10 TROUBLESHOOTING

13. The back of the copy is soiled.

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

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-57