Re: LG 42LG50FD-AD Intermittent NoGo
Pin 9 PWMCNTL is an open Drain, that MOSFET is normally low (on) but goes high if the Output is higher than the set limit and that is sensed by pin 8 HVSEN which it works in conjunction with VSENSE..
I would check Voltage at pin 7 VINAC since those high Ohm resistors in that sensing network tend to drift in values.
Look at page 10 for 'TYPICAL CHARACTERISTICS'
I did not read the whole spec sheet yet.
Pin 9 PWMCNTL is an open Drain, that MOSFET is normally low (on) but goes high if the Output is higher than the set limit and that is sensed by pin 8 HVSEN which it works in conjunction with VSENSE..
I would check Voltage at pin 7 VINAC since those high Ohm resistors in that sensing network tend to drift in values.
Look at page 10 for 'TYPICAL CHARACTERISTICS'
I did not read the whole spec sheet yet.
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