Hi,
I have a RCA TV model 27V412T, chassis M134C (mfg 01/06) in my shop that seems to have a mind of it's own. My customer said this problem got worse over time (a few weeks). I have Sams Photofact 5234.
The TV will play for a short time, then turn off, a short time later, it turns back on, then again it goes off, etc. I checked all solder joints (AOK).
HV is 28KV, reg B+ is 130V "run", and 10V in standby.. While the TV played, flexing the circuit board (removed from it's holder), tapping the circuit board, using a hot air gun on parts, had no effect.
I checked electroylitics in primary side of SMPS and reg. B+ (AOK). I checked voltages on secondary side of SMPS and found a schematic error for 24V source. I found 24V present at emitter of Q205 used as a "switch" (one of several) which indicates the 24V source is normal.
Did anyone encounter a similar problem?
Thanks in advance, Brad
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