CHAPTER 6 TROUBLESHOOTING6-123COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 20014.1.71 AC power is absentPower plug1) Is the work plug connected to the power outlet?NO: Connect the power plug.Source power2) Is the rated AC voltage present at the power outlet?NO: The problem is not of the copier’s. Advise the user.Leakage breaker3) Remove the rear cover, and check to find out if the leakage breakermounted to the power cord base has gone ON (at ).YES: Remove the cause of activation, and shift the switch of the leakagebreaker to the ‘|’ marking.Power cord, AC driver PCB4) Try replacing the power cord and the AC driver PCB. Is AC powersupplied?YES: End.NO: Check the wiring for AC power, and check the connectors for poorcontact.Connector5) Turn on the control panel power switch. Is the power supplied tothe connector (J28) on the DC power supply PCB?NO: Check the connection between the main controller PCB (J1021)and the all-night power supply PCB (J785).All-night power supply PCB6) Turn on the control panel power switch. Is 3.3 V supplied to theconnectors (J1021-1 and -2) on the main controller PCB?NO: Replace the all-night power supply PCB.Power switch (SW1), Wiring7) Connect the meter probes across both terminals of the powerswitch (SW1). Is the resistance 0ΩΩΩΩΩ when the switch is ON, and ∞Ω∞Ω∞Ω∞Ω∞Ωwhen the switch is OFF?NO: Replace the power switch.YES: Check the wiring for AC power, and check the connector for con-tact.
