COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-2715 The print has dots.CauseSecondarytransfer beltassemblySeparation sta-tic eliminatorSeparation sta-tic eliminatorbias PCBDC controllerPCBStep1234Yes/NoYESYESNOYESNOActionReplace the secondarytransfer charging roller.Replace the separationstatic eliminator.Connect them securely.End.Replace the DC con-troller CPB.ChecksIs the charging roller of the sec-ondary transfer belt deformed orworn?Is the charging wire of the separa-tion static eliminator broken?Are the connectors J5600, J5601,and J5602 on the separation staticeliminating bias PCB connectedsecurely?Replace the separation static elimi-nating bias PCB. Is the problem cor-rected?CauseConnector,WiringPre-exposureLED assemblyDC controllerPCBStep12Yes/NoNOYESNOActionConnect them securely.Replace the pre-expo-sure LED assembly.Replace the DC con-troller PCB.ChecksAre the connector J681 of the pre-exposure LED assembly, relay con-nectors J74 and J18, connectorsJ645 and J647 on the main relayPCB, and connector J227 on the DCcontroller PCB connected securely?Replace the pre-exposure LEDassembly. Is the problem corrected?16 The print has a ghost image.CauseDuplexing unitStep123Yes/NoYESYESYESNOActionClean the roller.Clean the guide.Clean the roller.Replace the duplexingunit.ChecksIs the duplexing feeding roller 1soiled?Is the feeding guide soiled?Is the reversing roller or the duplex-ing feeding roller 2 soiled?17 The print is soiled (in double-sided copying mode).Download free service manual at http://printer1.blogspot.com
