Welding Machine With Strange But Simple Issue Repaired.
A welding technician and his older son brought this welding machine for repair. They mentioned something about the machine welding for one minute or less and then it goes into shut down. They disconnect it for about five minutes, starting the machine again it goes through the process of showing the red light which basically shutting down to protect the system from further damage.
This Turkish made welding machine went to another repair technician and he advised them to bring it to me for repair which I gladly accepted.
As I recalled the information that the customer provided me with that it shuts down after one minute or two; that led me to think it was cold soldering joints issue. So the first thing that I checked were the Mosfets and there my suspicions were confirmed.
This is one of the areas where the Mosfets are and there are another four on the other side of this board. I did not add solder to the joints, instead, I de soldered all the joints then added fresh solder to all the Mosfets pins.
I scanned the entire board to see if there are more cold soldering joints but all checked fine.
In many articles I mentioned my brother who is a welding technician but this time I am actually showing him working on this welding machine I just repaired. The machine preformed amazingly well and to this easy fix I say…
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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Note: You can check his previous repair articles in the link below: