My bro-in-law has a Mastercraft 117-047-902 Mig welder that has no output of any kind, the cooling fan just keeps on running.
It appeared first that a diode was gone (there are 8 in this unit, 2 sets of 4 paralleled). It was replaced and worked for a few minutes then the main breaker tripped in the panel box. Now, he's found another diode shorted and it was replaced but now only has a running cooling fan.
anyone has a schematic or owner's manual for this unit. Please email or post it!
Any repair tips on this fault would be greatly appreciated!