TH-50PX50
TH-50PX500
PCB Designation: SC Board
PCB Part #: TNPA3567
Symptom: After pressing power button, unit shutdown then power LED blinks 7X.
Cause: SOS protection circuitry detects problem in scan output waveform Vf due to shorted scan output
transistor Q6604 & Q6654.
Remedy: Replace Q6604 and Q6654 on SC board
