Health issues abound, bad weather, a wake & funeral and other stuff,
have delayed digging into this Sanyo mess again. Thanks for taking the time to refresh yourself. You got me reading about re-healing fuses etc today..
I did not have that 2010V4 pdf.. It looks interesting.
Yeah, I just checked TH02 again, and it's 43 ohms. (both directions). Under power, there is 240 vac across it.
I guess these modern PTC devices can conduct current up to a certain value, before their resistance shoots up..
I have no way to tell if this one is allowing 200 mA to pass or 200 uA to surge pass..
It seems like after the on-surge, there isn't any current passing. Not noticeable.
Not sure what could cause a failure mode these things. Maybe a big spike?
I don't have any neon lamps that wouldn't need a very large series resistor at 240vac..
So, a 24k resistor should pass 10mA.. And if I still see no DC on the board, step up to 20 mA, and then 30 mA (last resort).
That should tell us if TH02 is a failed Bootstrap device or not..
It could also tell me if I need to get serious about buying a 1-ton Gree for the den..