42. The blanking exposure lamp fails to turn on.43. The pre-exposure lamp fails to turn on.CHAPTER 11 TROUBLESHOOTING11-107COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CauseDC controllerPCBBlankingexposure lampDC controllerPCBChecksRemove the blanking exposurelamp, and connect the connector.Select ‘BLANK’ in service mode( ). Does the blankingexposure lamp turn on when theuser mode key is pressed?Replace the blanking exposurelamp. Does the new lamp turn oncorrectly?]4]Step12YES/NOYESYESNOActionCheck the wiring fromthe blanking exposurelamp to the DC controllerPCB; if normal, replacethe DC controller PCB.End.Check the wiring fromthe blanking exposurelamp to the DC controllerPCB; if normal, replacethe DC controller PCB.CauseDC controllerPCBPre-exposurelamp PCBChecksSet the meter to the 30VDCrange. Does the voltage betweenJ103-B2 (–) and GND changefrom 24 to 0 V when the CopyStart key is pressed?Step1YES/NONOYESActionReplace the DC con-troller PCB.Check the wiring fromthe DC controller PCB tothe pre-exposure lampPCB; if normal, replacethe pre-exposure lamp.
