TH-42PD50
PCB Designation: SC Board
PCB Part #: TNPA3543
Symptom: Picture appears distorted (doubled) or full of randomly lit pixels as shown below.
Cause: Initialization pulse (T2) - level settings is misadjusted.
Remedy: Starting point of scanning pulse can be adjusted by VR6557 on SC PCB.
Procedure:
• Connect oscilloscope to TPSC1 test point on SC PCB (Fig.2)
• Adjust VR6557 on SC PCB so T2 time is 184μs (+ 5μs/ -10μs) (Fig.1)
