13. The back of the copy is soiled.COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-57CHAPTER 10 TROUBLESHOOTINGChecksTurn off the power switch whilepaper is moving through thefeeding assembly. Is the back ofthe copy soiled?Execute ‘No. 403’ in service mode(transfer roller cleaning). Is theproblem corrected?Make several solid white copies. Isthe problem corrected?Is the transfer charging rollersoiled excessively?Is the problem noted norizontallyat intervals of about 4.2 cm?Is the problem noted vertically atintervals of about 1.6 cm?Is the fixing pressure roller or thefixing film soiled with toner?CauseTransfercharging rollerDurm cartridgeDrum cleaningassembly(drumcartridge)FixingassemblyStep1234567ResultsNOYESYESYESYESYESNOYESNOActionGo to step 7.End.End.Replace the transfercharging roller.1. Clean the registrationroller and transferguide.2. Check the drumcartridge for leakageof toner.1. Clean the manualfeed roller.2. Check the drumcartridge for leakageof toner.1. Clean the cleaningassembly.2. Check the drumcartridge for leakageof toner.Clean the fixing pressureroller and the fixing film.Clean the delivery rollerand the fixing assemblypaper guide plate.
