Canon imageRUNNER ADVANCE C5255, Руководство по обслуживанию, Страница: 649 / 1443

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Troubleshooting > Startup System Failure Diagnosis > Flow B: Control Panel 12V Check Flow
Troubleshooting > Startup System Failure Diagnosis > Flow B: Control Panel 12V Check Flow
Flow B: Control Panel 12V Check Flow
● Control Panel 12V Check Flow
Is the FU4 of the
Relay PCB disconnected?
Disconnect the following connectors:
- J427 of the Relay PCB
- J1002 of the Control Panel CPU PCB
Is any one of them 0 ohm?
[Assumed failure location]
1. Short circuit of the cables
Replace the Relay PCB after fixing
the short circuit of the cables
[Assumed failure location]
1. Control Panel Unit
Replace the Control Panel Unit and
the Relay PCB
Has only
the backlight gone off?
(Can you hear the operation sound
of the Hard Key?)
Is 12V supplied to C1005
of the Control Panel CPU PCB?
Start
[Assumed failure location]
1. Control Panel CPU PCB
2. Main Controller PCB1
3. 12V Connector of the Control Panel
4. Control Panel Unit
Yes
No
(1)
Yes
No
No
No
Yes
Yes
Check the following resistances of the
cables connected to J1002 of the
Control Panel CPU PCB:
- Between pins 2 (orange) and pins 3 (blue)
- Between pins 2 and the chassis
[Assumed failure location]
1. Control Panel Unit
2. 12V Connector of the Control Panel
3. Main Controller PCB1
Turn OFF the Main Power Supply Switch
[Assumed failure location]
1. Disconnect the following connectors:
- J427 of the Relay PCB
- J1002 of the Control Panel CPU PCB
2.Check the conduction of the cables
between J427 and J1002
3. Relay PCB
(2)
(3)
(4)
(5)
(6)
(2)
(2)
(2)
F-6-143
● Check item
Item Check item Location
(1) Control Panel
CPU PCB
C1005 (12V)
Check the 12V
input to the Control
Panel CPU PCB
(C1005)
Tester