COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.3 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON) 13-87CHAPTER 13 TROUBLESHOOTINGCauseADJUST>HV-SP>HV-SPToner (excessamount)ActionEnd.Settings: -6 to 0Unit: 50 μACorrect the fault.Decrease the copydensity using the CopyDensity key.Step23Yes/NoYESYESNOChecksIncrease the setting of HV-SP inADJUST>HV-SP>HV-SP inservice mode. Is the problemcorrected?Check the latent image formationsystem and the developing system.Is there a fault?14 The copy is blank.Cause-------------Potential controlfaultTransfer chargingassemblyDevelopingassembly (faultylocking)Developingcylinder clutchTransfer high-voltageActionCheck the wiring of thefollowing PCBs; ifnormal, try replacement:• analog processor PCB• IP-MAIN PCB• CCD unitEnd.Set the lever to thelocked position.Fit the chargingassembly.See IV. 47..Check the developingcylinder clutch.• Check the transferhigh-voltage system.• Check the high-voltage cable from theHVT PCB to thetransfer chargingassembly: if a fault isfound, replace thehigh-voltage cable; ifnormal, replace theHVT-DC PCB.• Check the developingbias system.• Try replacing thedeveloping bias PCB.Step1234567Yes/NoYESYESNONONONOYESNOChecksGenerate a horizontal stripe testprint (TYPE=10). Is the imagenormal?Execute FUNCTION>DPC>DPCin service mode. Is the copy imageafter execution normal?Is the transfer blade locking leverof the transfer charging assemblyin the locked position?Is the transfer charging assemblysecurely fitted?Is the developing assembly lockedto the photosensitive drum duringdevelopment?Is the developing cylinder rotatingduring development?Open the front right cover duringdevelopment, and remove thephotosensitive drum unit. Is theimage on the photosensitive drumnormal?
