Hi all , i have an NBC250 inverter mig welder which has no spark , the fan works ok , the wire feed seems ok when i press the torch trigger just no arc ,
i have checked all the mosfets and diodes on the large heatsink (labeled on photo) ,all these check out ok ..
The only place i don’t seem to get any voltage is on this one cable which goes from the bottom board with all the mosfet / diodes , circled in red , im not sure which board should feed which and when ..
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