Does anyone know if their are any service manuals/schematics available for the 200amp multifunction welders, so that their is a way of testing the boards to self diagnose the problems.I used to service electronics and don't want to send the unit back and forth, packing unpacking etc.I blew a SCR in the board on the left side of the machine as you face it; it is the first heat sinked scr at the front and perpendicular to the board with other heat sinked scr's, and in fact i take responsobility for the problem, so it is not a mfging problem.I got this machine for parts but realize maybe it is fixable.