Ac Power Is Absent - Canon iR105 Service Manual

4.1.71 AC power is absent

Power plug
1) Is the work plug connected to the power outlet?
NO:
Source power
2) Is the rated AC voltage present at the power outlet?
NO:
Leakage breaker
3) Remove the rear cover, and check to find out if the leakage breaker
YES: Remove the cause of activation, and shift the switch of the leakage
Power cord, AC driver PCB
4) Try replacing the power cord and the AC driver PCB. Is AC power
YES: End.
NO:
Connector
5) Turn on the control panel power switch. Is the power supplied to
NO:
All-night power supply PCB
6) Turn on the control panel power switch. Is 3.3 V supplied to the
NO:
Power switch (SW1), Wiring
7) Connect the meter probes across both terminals of the power
NO:
YES: Check the wiring for AC power, and check the connector for con-
COPYRIGHT© 2001 CANON INC.
Connect the power plug.
The problem is not of the copier's. Advise the user.
mounted to the power cord base has gone ON (at
breaker to the '|' marking.
supplied?
Check the wiring for AC power, and check the connectors for poor
contact.
the connector (J28) on the DC power supply PCB?
Check the connection between the main controller PCB (J1021)
and the all-night power supply PCB (J785).
connectors (J1021-1 and -2) on the main controller PCB?
Replace the all-night power supply PCB.
switch (SW1). Is the resistance 0Ω Ω Ω Ω Ω when the switch is ON, and ∞Ω
when the switch is OFF?
Replace the power switch.
tact.
2000 2000 2000 2000
CHAPTER 6 TROUBLESHOOTING
CANON iR105 REV.0 JULY 2001
).
∞Ω ∞Ω ∞Ω ∞Ω
6-123