No output. Repair of a welding machine

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i love that

I have mesin welding .no out put how to refair

Hi RepairLab14, do you have the diagram for this welder? thanks in advance

Regarding the 4 places, I think it is for either 2 IGBT or using 4 mosfets selection choices.

Boss what is problem for inverter welding machine 200a,250a,300a, after I change the four igbt, and I check the output voltage is 90vdc, when I test the sparking, immediately the igbt will explode back, sir what is the cause sir?

عمل جيد. شكرا على الفيديو.

I recently got a Kzubr 400N MMA single phase stick welder which claims to (input 220v-36.6A stable, up to 47.6A max input)output 400A lol.
Anyway it seems to be built solid and after further inspection I found that the real output is actually 200A which is still awesome considering I paid 120€ for it. Anyhow I have taken it apart and examined it and the insides look pretty identical but instead of the ground and stinger bars that are made of aluminium in the one shown in the video mine has them made of copper which was nice to see.
Anyhow what do you think the life expectancy will be of my machine?

I have looked at data sheets and diqgrams and no info on correct voltage at shutdown/soft start pin. Thanks for sharing the info. 👍

What’s your address?

Hello I have the same problem on my mma 250 igbt welder. Pin 8 was reading low and I've removed j3y smd transistor and now it works. Should I wait for replacement transistor arrives or can I work with welder?
Thank you

I got the problem it sparks but too weak

Sg3525 ur ic?

I have the same welder and I have 67 volts at the output but it has no current. The output diodes and triacs are fine, the sg3525 works correctly. I don't know where to look anymore

Gracias, no tenìa voltaje de referencia del pin 8 del SG3525, para futuras reparaciones

Bonjour

I have a welder machine which there is not output voltage. I tested 2 IGBT = Ok, 4 Diodes = Ok, 3 Polyester caps ok, 2 with 4.7 uF and 0.02 Esr and other 400v with 4.7uF and 0.03 Esr. Bridge rectifier is Ok. But, i haven't square waves in gate of 2 igbts. Thre wave it's similar to a part of senoid. Is the module the problem ?

Good

Superb work bro. Please upload more videos on welding machine repiring.

excelente video... tengo un problema parecido en el pin 8 tengo 7.8v y no arranca el integrado... ya cambie los dos trasistores y revise todas las resistencias... no puedo encontrar el programa

Hii can you share 400amp welding machine control card circuit diagram ???

ThankyouSir🙏🇮🇳

सर आवाज केसाथ वीडीयो बनाईये लीखने का तरीका भी चालु रखे आप जेसे लोग दुनीया मे कम मीलते है जो दुसरो को काम आते हैं

Nice!