Canon imageRUNNER ADVANCE C5255, Service Manual, Page: 652 / 1443

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Troubleshooting > Startup System Failure Diagnosis > Flow C: Main Controller Analysis Flow > Status Check
Troubleshooting > Startup System Failure Diagnosis > Flow C: Main Controller Analysis Flow > Status Check
Flow C: Main Controller Analysis Flow
■ Status Check
If the Main Controller 1 LED 9 and Main Controller 2 LED 4 cannot be turned ON, identify
the location of the failure according to the flow.
● Flow for narrowing down troubles
Pre-check items
• Check whether the Main Controller 1 and Main Controller 2 are connected properly to the
Riser PCB.
• Check whether the cables between the Main Controller 1 and the Control Panel are
connected properly.
If the Control Panel is not turned ON even after these checks, try identifying the location of
the failure through the following procedure.
Yes
No
(3)
Analysis complete
Has the machine
normally started up?
Is LED 4 ON?
Visually check the
Main Controller 1 LED 9
Is LED 9 ON?
Visually check the
Main Controller 1 LED 9
Replace the Main
Controller PCB2
Replace the Main
Controller PCB1
Restart the host machine
Is LED 9 ON?
E60Is E602 displayed?
(Wait about five minutes until it
is displayed)
Yes
No
No
No
Yes
Yes
No
Yes
(2)
After turning OFF the power
of the host machine, remove
the Main Controller 2 from
the host machine and turn OFF
the power of the host machine.
Replace the Main
Controller PCB1
(1)
Visually check the
Main Controller 2 LED 4
- Check whether the Main Controller 1 and Main Controller 2
are connected properly to the Riser PCB.
- Check whether the cables between the Main Controller 1
and the Control Panel are connected properly.
After turning OFF the power
of the host machine, remove
the Main Controller 2 from
the host machine and turn OFF
the power of the host machine.
(2)
(1)
(1)
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