Flow A: Identifying The Cause Between The Power Supply Or The Main Controller - Canon imageRUNNER ADVANCE C3330 Series Service Manual

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Flow A: Identifying the Cause Between
the Power Supply or the Main Controller
Flow A: Identifying the Cause Between the Power Supply or the Main
Controller
■ Status Check
If the Control Panel is black when the power of the host machine is turned ON, identify the location of the failure according to the
flow.
■ Flow for narrowing down troubles
If the Control Panel LED is ON, the All-night Power Supply (3.3V) is being supplied.
If the Control Panel LED is not ON, it can be suspected that a failure has occurred in the signal path of the Main Power Supply
Switch or to the Low-voltage Power Supply PCB itself.
If the Control Panel LED is ON, it is likely that an error has occurred to 12V power supply.
3.3 V power supply route
12 V power supply route
Power-On
Not lit
Lit
Only the bar is displayed
Yes
"NG" is displayed
as a result in the startup system
failure diagnosis
No
Countermeasures related to system software
- Reinstall the system.
- Replace the
Low-Voltage
Power Supply PCB
AC
J301
J321
DC 3.3V
Power ON signal
J321
Low-Voltage
12V Power Supply line
Power Supply
J313
PCB
J314
12V Power Supply line
418
Flow A: Identifying the Cause Between
the Power Supply or the Main Controller
The logo is displayed Display of E-code
Flow C:
Execution Flow of
Refer to the error code
Startup System
correspondence table
Failure Diagnosis
for countermeasures
.
Control Panel
J1003
J4
DC 3.3V
Main Controller PCB
J25
Main Power
Supply SW
Main Controller PCB
J25
J20
Control Panel
control signal
Control
Panel
J1118
6. Troubleshooting
EXXX-XXXX