Tools - my TIG200 died a couple weeks back - when I was planning on welding the shift lever. Called Eastwood, and whilst all the components can be purchased (quite reasonably too), there are no schematics or fault tracing guides available (WTF???) - so, the only way to diagnose is to look for obvious signs of circuit damage, and/or replace boards willy-nilly. They do allow you to return any board that doesn't fix it for full credit within 90 days though.
The symptom was that the unit would turn on, but neither the pedal trigger nor the switch would initiate gas flow & trigger an arc.
Started with boards related to the controls
This one, for the pedal trigger feed, they don't sell - I just reflowed the joints & confirmed continuity I/O, but it didn't fix it
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Tried this board next under $30
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couldn't see anything wrong with the upper invertor board.
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tried the front panel board under $20 - nope.
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Turned out it was this drive board (under $90), which was my 3rd attempt. Can't see anything wrong with the circuitry that would be an obvious issue, but it worked (triggered an arc) as soon as I got the new board in.
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