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

[chy_farm]

Good morning chy-farm, yes I am a Veteran, however I don't tend to advertise it, that happened to be the only resent photo I had at the time I joined. I don't repair a lot of electronics especially newer stuff, I do have an older welder (abt. 30 yr old) that I am hoping your article will help me to get operating once again. When I finally get the time to check it out.
Have a great day.
Jerry

Good afternoon Jerry, thank you for your replay. Hope you can give your old and cute welder a good care. Have a great day too!
Chy

[vaughn45]

Hello Jerry4Truth, and good afternoon Sir. I love to see your avatar image here! Is this telling that you are one of the veterans? If so, I always pay greatest respects to them.
Thank you for your comment on this capacitor issues, but I really do not hope you got troubled with that sort of capacitor things in any machines there, lol.
Chy

I am following your progress i have a MiG welder which was given to me and I welds (*&*^%$&(&*) like that. Was supposed to be a good welder. I am not a good welder but a mud dobber type. With this welder a mud dobber would be a work of art. I was wonder if if I could contact you with emails and maybe resolve my situation.
Thank you for your Time
Butch

[chy_farm]

Ugh. The Capacitor Plague plagues us all. Nice fix on that welder!

Hello Bruce.desertrat, yes they sometimes do bad on boards, let's keep watching them! Thank you for your comment.
Chy

[PJs]

Really nice write up with good pictures Chy! I like the way you were thorough in your inspections and found the burnt board and corrosion under the caps. The other thing I look for is cold solder joints, especially a board that has been hot. I tend to touch them up when replacing parts. Nice use of Ceramic R's and the heat sink will help draw the heat away especially with the new fan.

Terrific, Thanks for sharing this!

PJ

[chy_farm]

Really nice write up with good pictures Chy! I like the way you were thorough in your inspections and found the burnt board and corrosion under the caps. The other thing I look for is cold solder joints, especially a board that has been hot. I tend to touch them up when replacing parts. Nice use of Ceramic R's and the heat sink will help draw the heat away especially with the new fan.
Terrific, Thanks for sharing this! PJ

Good evening PJs, your nice words are too much for me, but thank you very much. I may be only a small student who keep learning electric things, will look forward to seeing and learning more from here and yours.
Chy

[blkadder]

Great job on getting the welder up and running. I have had some success getting old electronics working again by replacing old capacitors and resistors. I love how you have photo documented what you have done, since this will give someone a good idea on how to fix their welder.

[chy_farm]

Great job on getting the welder up and running. I have had some success getting old electronics working again by replacing old capacitors and resistors. I love how you have photo documented what you have done, since this will give someone a good idea on how to fix their welder.

Good evening Blkadder, thank you very much for nice words. Glad you like this post and hope this will be of some help to the members and guests here.
Chy

[VinnieL]

If you have access to one, an ESR Meter will better help diagnose faulty capacitors without having to remove them from the circuit.

[chy_farm]

If you have access to one, an ESR Meter will better help diagnose faulty capacitors without having to remove them from the circuit.

Thanks, this is informative.
I have learned some about this method while ago, and tried this device myself;


In case the capacitor got too bad this works good, but if it has very small symptom this does not work right.
A very small sign of gas-leakage under a capacitor may be too subtle for the meter to show something too bad.
This means if you do this sort of job on a preventive measure, you d better try remove one to know what. IMHO.
Thank you again.