Replacing capacitors in old TIG welder, and adding cooling unit.

[chy_farm]

I also made a check to the secondary power board of this welder, found some minor deterioration to the capacitors and resistors located near IGBT(Insulated Gate Bipolar Transistor) s.

Resistors:

reverse side looks like this, had some burn under these resistors.


This part seemed to be the worst, some sticky stuff had accumulated a lot of dust.




Capacitors:
Four bigger capacitors were removed and checked the holes;




(to be continued...)
Chy