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©
2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 6 TROUBLESHOOTING
6-132
4.1.79 DC power is absent
Control pane power switch
1) Is the main power lamp ON?
NO: Go to step 6.
Connector
2) Is the connection of the connectors of the following PCBs normal?
• Relay PCB J1718
• DC controller PCB J501, J525
AC power supply
3) Is the rated voltage present between the connectors J28-1 and -5
and between J28-2 and -7 on the DC power supply PCB?
NO: See “4.1.78 AC power is absent.”
Wiring
4) Is the connection of the cable of the connector J1701-4 (overcurrent
detection signal 1) of the relay PCB normal?
NO: Correct the connection.
Fuse (FU101)
5) Is the fuse (FU101) on the DC power supply blown?
YES: Remove the cause of the fuse, and replace the fuse.
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