The Dc Power Supply Fails To Operate. 1 - Canon iR105 Service Manual

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CHAPTER 6 TROUBLESHOOTING

4.1.72 The DC power supply fails to operate. 1

Control pane power switch-related items

1) Is the main power lamp ON?

YES: See "The DC power supply fails to operate. 2"

AC power supply

2) Is the rated voltage present between J28-1 and J28-5 and between

3) Is the cable of the connector J1701-4 (overcurrent detection signal

Fuse (FU101)

4) Is the fuse (FU101) on the DC power supply PCB blown?

YES: Remove the cause, and replace the fuse.

Wiring, DC load, DC power supply PCB

5) Turn off the main power switch. When the main power switch is

YES: Turn off the power switch, and disconnect the following connectors

J28-2 and J28-7 on the DC power supply PCB?

See "AC power is absent."

1) on the relay PCB normal?

turned on in about 3 min, is the voltage between the following ter-

minals of the relay PCB normal?

However, the output voltages in the table are based on a tolerance

in AC input of ±10%.

of the relay PCB:

Connect one of the disconnected connectors, and turn on the power

switch. Repeat this for all connectors to find the connector for

which the protective circuit goes ON. Then, check the wiring and

DC loads connected to the connector.

Replace the DC power supply PCB.

Output voltage

2000 2000 2000 2000

CANON iR105 REV.0 JULY 2001

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