Pioneer WYC009AMFI20 Service Manual page 44

9.3.9 Over voltage or too low voltage protection diagnosis and solution(P1)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
P1
An abnormal voltage rise or drop is detected by checking the
specified voltage detection circuit.
Power supply problems.
●
System leakage or block
●
PCB faulty
●
P
N
42
Remark:
Measure the DC voltage
between P and N port. The
normal value should be
around 310V.