One of my frequent customers called me about this welding machine. It was producing a hissing sound while welding. I was not in the shop when he called so I promised to drop by his shop and pick it up on my way to the shop.

hissing sound in welder inverter repair

It is a Chinese made welding machine and it was a very tiny one.




Usually this customer deals with big sizes welding machine.

how to repair welder inverter

I took some screws off and I was able to see inside the machine. The moment I took the cover off, I saw this.

welder inverter repair

This is one of the welding terminals found on the side of the machine. That explained the hissing sound the customer was talking about. The screw that holds the metal soldered piece to the printed circuit was failing and therefore, it needed a new plate to be replaced.




I took the screw off and cleaned the area then add a copper metal piece to that locating soldered it back on that board.

how to fix welder inverter

Sorry it is a little pit out of focus but it is clear enough to see the copper metal piece attached to that board. Once that is done, I screwed the screw back through that hole attaching the copper metal piece to the board. Once I did that and turn it on, the hiss sound was gone.

welder inverter fix

Green light is not and ready for use. Mission accomplished.

waleed

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:

https://www.electronicsrepairfaq.com/a-hi-hat-controller-repaired-model-roland-fd-8

About

Jestine Yong works as an Electronics Repair Lecturer in Kuala Lumpur Malaysia and his training website is http://www.NoahtechElectronicsTraining.com. You can check out his repair blog at http://www.JestineYong.com

5 comments on “How To Get Rid Of Hissing Sound In Welding Inverter

  1. Parasuraman says:

    A very good fix! Thanks for sharing!

  2. Justice says:

    Thanks Walleed, one learns forever.

  3. Albert van Bemmelen says:

    You’ve got a lot of Welder repairs to deal with. Good job!

  4. James says:

    Good ole Chinese metal :) anyways, good job.

  5. harris dela pena says:

    thanks for info and sharing with us.. job well done…god bless you justine….more blessing to come

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