| E712 Error code details Communication error (with ADF)
The connect has poor connection. The main power supply PCB is faulty.
The ADF controller PCB is faulty. The reader controller PCB is faulty.
1. Connector
Is the interface able between the ADF controller PCB and the reader controller PCB normal?
NO: Correct the cable.
2. Main power supply PCB
While the ADF is in operation, does the voltage between J203-2 (+) and J203-1 (-) on the main power supply PCB change from 0 to about 24 V?
NO: Replace the main power supply PCB.
3. ADF controller PCB, Reader controller PCB
Try replacing the ADF controller PCB. Is the problem corrected?
YES: End.
NO: Replace the rear controller PCB.
E803 Error code details MPWS power supply voltage error (low voltage error)
The wiring is faulty (short circuit, open circuit). The composite power supply PCB is faulty. The DC controller PCB is faulty.
1. Connectors
Are the connectors J204 on the main power supply PCB and the connector J300 on the DC controller PCB connected securely?
NO: Connect the connectors securely.
2. Main power supply PCB
Is 24 V supplied by the main power supply PCB (J204) to the DC controller PCB (J300)?
(J204-5 <-> J300-5: OVU3, J204-6 <-> J300-6: OVU3,
J204-7 <-> J300-7: 24VU3, J204-8 <-> J300-8: 24VU3)
NO: Replace the main power supply PCB.
YES: Replace the DC controller PCB.
Hope this helps out. |