31. AC power is absent.CHAPTER 11 TROUBLESHOOTING11-97COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CausePower plugPower sourceLeakagecurrent breaker(BK)Power supplycord, Line filter(LF1)Front doorFront doorswitch (SW2)Front doorswitch (SW2)WiringPower supplyswitch (SW1)WiringChecksIs the power plug connected to thepower outlet?Is the rated AC voltage present atthe power source?Is the rated voltage presentbetween J301-1 and J301-5,between J301-3 and J301-5, andbetween J302-1 and J302-3?(J301 and J302 are in the powersupply unit.)Remove the rear cover, and checkthe leakage current breakerinstalled on the power supply cordmount.Is it normal (switch is at ‘1’)?Replace the power cord and theline filter (LF1). Is AC power sup-plied?Is the front door closed securely?Is the front door switch (SW2)firmly pressed when the front dooris closed?Remove the door switch, and con-nect the probe of the meter todoor switches 1 and 2 or 3 and 4;is the resistance 0Ω when theactuator is pressed and ∞ Ω whenreleased?Is the wiring connected to thedoor switch normal?Connect the probes of the meterto both terminals of the powerswitch (SW1). Is the resistance0Ω when the switch is turned onand ∞ Ω when turned off?Step12345678910YES/NONONOYESNOYESNONONONONONOYESActionConnect the power plug.The problem is not themachine’s. Advise theuser.End.Remove the cause of theactivation, and shift theswitch to ‘1’.End.Check the wiring of theAC power line, andcheck the connectors forpoor contact.Close the front door.Adjust the position of theswitch (SW2).Replace the door switch.Connect it correctly.Replace the powerswitch.Check the wiring of theAC power supply line.Check the connectors forpoor contact.
