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Troubleshooting > Startup System Failure Diagnosis > Flow D: All-night Power Supply (3.3V) System Flow > Status Check
Troubleshooting > Startup System Failure Diagnosis > Flow D: All-night Power Supply (3.3V) System Flow > Status Check
Flow D: All-night Power Supply (3.3V) System Flow
■ Status Check
Disconnect J413 of the Relay PCB and, if 3.3V is not supplied to the yellow and blue Lead
Wires, identify the location of the failure according to the flow.
● Flow for narrowing down troubles
The following diagram shows the 3.3V power supply route.
AC driver PCB
J1014
All-night power
supply PCB(3.3V)
J691
Relay PCB
J413
DC
3.3V
AC power
(e.g.115 V - 230V)
F-6-145
Identify the cause in the following flow:
- Check if the Leakage Breaker is
turned OFF
- Failure of the AC Driver
Failure of the All-night Power Supply
The All-night Power Supply (3.3V) is not
supplied to the Main Controllers.
1.Turn OFF the Main Power Supply Switch
2.Disconnect J413 of the Relay PCB
3.Turn ON the Main Power Supply Switch
Do the yellow and blue
Lead Wires on the Connector Terminal
side have 3.3V output?
Disconnect J1014 of the AC Driver
Is the AC voltage
AC power(e.g.115 V - 230V)
or more between pins 1 and pins 4
on the PCB side
of J1014?
- Failure of the Main Controller
- Failure of the Relay PCB
- Harnesses between the All-night Power
Supply and Relay PCB are trapped
- The harness of the Relay PCB/Riser
PCB is trapped
No
No
Yes
Yes
(1)
(2)
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