I have taken a couple more photos to get a better overview.
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As it looks to me, this is the source of the actual voltage to be outputted. There is a smaller transformer right behind the net connector, and it goes to the usual 7805 and 7812, so that must be for the control print. I suppose this part have not been damaged.
So it must be some kind of switchmode mosfet located at the heatsink, and the resistor that is blown, could be the shunt resistor used to meassure ampere usage i guess. It was raised a lot above the print, and must have been a 5 or 10 w. So maybe the resistor is not so hard to figure again, properly a low value like 0.1ohm. That means i could try low values until the ampera display show correct. ( if its the right guess of its use ofcause... )
But why it should be located at highvoltage side seems a little odd maybe...
Well brings me back to the mosfet looking guy at the heatsink, but there i need a datasheet before making a replace.
Thanks again for trying to help me out here.
//Dennis