It is a Transmig 190 that is less than 10 years old and has only done about 5 hours of welding. I tried to use it a couple of weeks ago for the first time in about 2 years (it worked fine when I last used it 2 years ago), and the fan came on, but nothing else worked so I took it in for repair. CP131-40 Rev D Weldmatic 190 internal wirefeeder Operators Manual Weldmatic 190 MIG welder Model No. CP131-1, Iss A 02/12.
Previous owner said it simply 'stopped' and needed a new 'card.'
This is the burned component that fell off the card.
Cig Transmig 195 Manual Free
I googled about and found the AUD90 (!!!!!) replacement card. when i stood back up i had a re-google and saw that the burned component was the only part that ever failed. It was very consistently asked about on welding forums.It is a wire-wound resister, they fail quite commonly in a lot of DC-DC power supplies I used a Jewellers eyepiece to read the rating (3.3ohms and 7watts)and was ecstatic to find that the component was locally available for AUD1.80. A nice little saving.
I actually got a 10watt as it takes more heat. The repaired card (below) was whacked into the mig and now sweeps through its range and at all power settings.
A little note, even the higher wattage resister is getting too hot to touch while welding, it obviously is heavily loaded so I can see why the original would burn with prolonged welding. Allowing it to cool between short welds would be prudent.
Cig Transmig 195 Manual Transmission
Cig Transmig 195 Manual Download
Most of the smaller 'hobby' migs are very similar inside. The resister is a different rating from make to make but the principals are the same.Hope this helps somebody, in all I've got about an hours repair time in it and a couple of hours search time. Thanks to Lilly, my assistant