I have to welder, Miller Maxstar 200 LX and Miller Maxstar 200 SD. LX has a problem with discrete elements, I will share photos of my board and what I fixed, SD has a broken IGBT ( Q4 is shorted , I have cut the wires connected to it, haven't check ...
lanuser This is module wiring, exept added resistors and two zener diodes. Also in wiring missing 3 ph bridgerectifier. In welder is a lot of space to mount serparate bridge on radiator like this Need more wiring modifications or add/remove components? Any suggestion...