YES/NOYESNONONONOYESNO44. The scanning lamp fails to turn on.CHAPTER 11 TROUBLESHOOTING11-108 COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CauseConnectorLamp (LA1)Thermal fuse(FU1)Lamp (LA1)DC controllerPCBLamp regulator(LR1)WiringChecksSelect ‘SCAN LAMP’ in servicemode ( ). Does the scannerlamp remain on for 3 sec whenthe user mode key is pressed?Is the scanning lamp (LA1)installed correctly?Disconnect the power plug fromthe power outlet, and remove thethermal fuse. Is there electricalcontinuity between both terminalsof the thermal fuse?Set the meter to the Ω×1 range,and disconnect the connector J4.Does the index of the meter swingwhen the probes of the meter areconnected to both terminals of thelamp?Set the meter to the 12VDCrange, and measure the voltagebetween J111-B8 (+) and J111-B5(–) on the DC controller PCB.Does it change from about 5 to 0V when the Copy Start key ispressed?Replace the lamp regulator. Is theproblem corrected?]4]Step123456ActionThe connector may havepoor contact. Check theconnector.Disconnect the powerplug, and install the lampcorrectly.Replace the thermalfuse.Caution:The lamp may haveturned on wrongly, thefuse may be installedwrongly, or the coolingfan may be malfunc-tioning. Make checks.Replace the lamp.Replace the DCcontroller PCB.End.1. Check the AC har-ness from the powersupply switch to thelamp regulator.2. Check the DC har-ness from the DCcontroller PCB to thelamp regulator.
