Moinmoin, have the following problem, my As 500 has dissolved into steam. I just took them apart and caught them, that all 75333P Mosfet ́s have smoked. Did someone ever have such a thing??? I wonder now, if it brings the 8 Moseft ́s exchange or if that comes somewhere else, problem is that I don ́t have a schematic. Can someone tell me now if all of them hang in row or how that is built up??? The Elkos and coils all still look quite in Or dnung out, as I see it (only with the eyes, unfortunately can not measure here) There are 16 33N10 Mosfets installed, each in groups of 4, I assume that the 2 groups are for a channel, but these still look healthy, (sSchtkontrolle) Do you mean that the 75333P can just use ALL at once and then only those are broken or do I still have a problem in the power supply?? the 75333P cost per st. 83 cent, so it would only work to exchange the ones. Thanks for your help