Sir pharaon . . . . .
Ahhhhhhh . . . yes their design must have the two N-FETS arranged in series and the higher voltage rated unit is connected closer to the 330 VDC source, with the other one being below it to ground.
You certainly did a good job in getting the white silicone rubber from the foil side of the board.
In post 17 you have 3 board pictures , the top one looks good with all parts on it
The botom picture looks good with one R100 pulled
BUT the middle one looks dismal in its center area, I hope that is not the PRESENT state of the board.
There is no chance that you are just plugging this board in to test it . . .is there ?
It should always be tested with a 60 watt incandescant lamp wired in place of the fuse OR be wired in series with one of the ac power wires coming into the board.
Just want to confirm that .
73’s De Edd
Ahhhhhhh . . . yes their design must have the two N-FETS arranged in series and the higher voltage rated unit is connected closer to the 330 VDC source, with the other one being below it to ground.
You certainly did a good job in getting the white silicone rubber from the foil side of the board.
In post 17 you have 3 board pictures , the top one looks good with all parts on it
The botom picture looks good with one R100 pulled
BUT the middle one looks dismal in its center area, I hope that is not the PRESENT state of the board.
There is no chance that you are just plugging this board in to test it . . .is there ?
It should always be tested with a 60 watt incandescant lamp wired in place of the fuse OR be wired in series with one of the ac power wires coming into the board.
Just want to confirm that .
73’s De Edd