Flow D: Low-Voltage Power Supply (3.3V) System Flow - Canon imageRUNNER ADVANCE C2030 Service Manual

Flow D: Low-voltage Power Supply (3.3V) System Flow

■ Status Check
If 3.3V is not supplied to J22 of the Main Controller 2, identify the location of failure
according to the flow.
● Flow for narrowing down troubles
The following diagram shows the 3.3V power supply route.
AC power
AC driver PCB
(e.g.115 V - 230 V)
J102
J101
J110
J113
6
Troubleshooting > Startup System Failure Diagnosis > Flow D: Low-voltage Power Supply (3.3V) System Flow > Status Check
Low-voltage
AC power
Power Supply Unit
(e.g.115 V - 230 V)
J1
J11
DC
3.3V
DC
Main Controller 2
3.3V
J22
F-6-133
6 Troubleshooting > Startup System Failure Diagnosis > Flow D: Low-voltage Power Supply (3.3V) System Flow > Status Check
Identify the cause in the following flow:
The Low-voltage Power Supply(3.3V) is
not supplied to the Main Controllers.
(1)
Yes
Is there output of 3.3V
to the PCB side of J113 (pin 1) of
the AC driver PCB?
No
(2)
Yes
Is there input of 3.3V
to the PCB side of J110 (pin 1) of
the AC driver PCB?
No
(3)
Yes
Is there output of 3.3V
to the PCB side of J11 (pin 1) of the Low-voltage
Power Supply PCB?
No
(4)
Is there input of AC Yes
power(e.g.115 V - 230 V) to the PCB side of J1
(pins 1 and 3) of the Low-voltage
Power Supply PCB?
No
(5)
Yes
Is there output of AC
power(e.g.115 V - 230 V) to the PCB side of J102
(pins 4 and 5) of the
AC driver PCB?
No
Yes
(6)
Is there input of AC
power(e.g.115 V - 230 V) to the PCB
side of J101 (pin 1) of the
AC driver PCB?
(FU101, FU201) of theAC driver PCB
No
between J102 of the AC driver
PCB and J1 of the Low-voltage Power
- Replace
6-95
- Failure of harness (disconnection)
between J113 of the AC driver PCB
and J22 of the Main Controller 2
- Failure of the Main Controller 2
- Failure of the AC driver PCB
- Failure of harness (disconnection) between
J110 of the AC driver PCB and J11 of the
Low-voltage Power Supply PCB
- Failure of the AC driver PCB
- Failure of the Low-voltage Power Supply
- Failure of harness (disconnection) between
J102 of the AC driver PCB and J1 of the
Low-voltage Power Supply PCB
- Failure of the Low-voltage Power Supply
(7)
No
Is the fuses
disconnected?
Yes
- Failure of the
AC driver PCB
(8)
Is the harness
No
Supply PCB disconnected
/shorted?
- Failure of the
Yes AC driver PCB
the host machine
F-6-134
6-95