7-113COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS21 E07322 E074CauseTransfer beltlifter sensor 1(PS12), 2 (PS13)Operation(faulty)Sensor (position)Pick-up motorTransfer beltlifter clutch(CL17)DC controllerPCBCauseTransfer framedrawer connec-tor, DC controllerPCBStep1ChecksIs the transfer frame drawer connec-tor soiled with toner or damaged?Yes/NoYESNOActionClean and replace thedrawer connector.Check the wiring fromJ2218 on the DC control-ler PCB to the transferframe drawer connectorJ6122; if normal, replacethe DC controller PCB.Step12345ChecksIs the sensor normal? (See theinstructions on how to checkphotointerrupters.)Turn the transfer belt lifter drive shaftby a finger. Does it turn smoothly?Turn OFF and ON the power switchto clear ‘E074’.Press the Start key, and check theoperation of the lifter of the transferbelt by the eye. Does the transferbelt move up and down?Turn OFF and ON the power switchonce again, and press the Start key.Does the pick-up motor rotate?Turn OFF and ON the power switchonce again, and press the Start key.Does the voltage between J2226A-5and J2226A-4 on the DC controllerPCB change from 0 V to 24 V?Yes/NoNONOYESNOYESNOActionReplace the sensor.Remove the cause of thefaulty rotation.Check the position of thesensor; if normal, replacethe DC controller PCB.Check the wiring; ifnormal, replace the pick-up motor.Check the wiring from theclutch to the DC controllerPCB; if normal, replacethe clutch.Replace the DC controllerPCB.
