CHAPTER 6 SELF DIAGNOSIS
6-27
E712
0001
The communication is not resumed 3 sec or more after data has been writ-
ten to the error register of the communication IC (IPC) on the ADF control-
ler PCB.
0002
The transmission bit is not enabled 10 sec or more in the sync register of the
communication IC (IPC) on e reader controller PCB.
Main cause
The connect has poor connection. The main power supply PCB is faulty.
The ADF controller PCB is faulty. The reader controller PCB is faulty.
Action
1. Connector
Is the interface able between the ADF controller PCB and the reader con-
troller 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.
