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No output. Repair of a welding machine 

RepairLab14
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Repair of an extremely low cost inverter. No output voltage.

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22 авг 2024

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Комментарии : 45   
@repairlab14
@repairlab14 2 года назад
If you enjoyed this video please like and leave your comments! Share this video with your friends! Thank you!
@user-uc4jd7yo9q
@user-uc4jd7yo9q Месяц назад
Здравствуйте. Этот канал для англоязычных)
@khizarali89
@khizarali89 Месяц назад
Very nice video
@shannosilva8134
@shannosilva8134 7 месяцев назад
Buenas tardes “ Señores muy buenos sus videos; solo le falta es grabarlos con audio ; ya q es fundamental el audio para interpretar mejor el video; muchas gracias
@ajithp2714
@ajithp2714 2 года назад
Superb work bro. Please upload more videos on welding machine repiring.
@ttkoh123
@ttkoh123 Год назад
Regarding the 4 places, I think it is for either 2 IGBT or using 4 mosfets selection choices.
@flacoanemico5199
@flacoanemico5199 Год назад
I have looked at data sheets and diqgrams and no info on correct voltage at shutdown/soft start pin. Thanks for sharing the info. 👍
@repairlab14
@repairlab14 Год назад
Vref 5V
@abdellahzaidi1257
@abdellahzaidi1257 Год назад
عمل جيد. شكرا على الفيديو.
@bernardobustos1554
@bernardobustos1554 2 года назад
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
@repairlab14
@repairlab14 2 года назад
On pin-8 must be 5 volts, same as vref. Replace 3525.
@bernardobustos1554
@bernardobustos1554 2 года назад
@@repairlab14 ya lo cambie pero persiste el problema....... gracias por responder
@alexanderdevia417
@alexanderdevia417 Год назад
Gracias, no tenìa voltaje de referencia del pin 8 del SG3525, para futuras reparaciones
@user-ld7qj7ho7z
@user-ld7qj7ho7z 2 месяца назад
How many voltage out this plant
@ghosttowncrawler3613
@ghosttowncrawler3613 2 года назад
Nice!
@manjunath7775
@manjunath7775 6 месяцев назад
Hello bro,i changed all 8050 ,zener,6.2k ,22k resistor but i am getting 0.8v at 8pin of 3525 what could be yhe Resason,should I remove IC because that only left to change now
@UlisesElMagnanimo
@UlisesElMagnanimo Год назад
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
@repairlab14
@repairlab14 Год назад
Maybe operational amplifier LM358
@madank.r1346
@madank.r1346 Месяц назад
BRO Q1,Q2,Q3,Q4 TRANSISTER VALUE?
@albertogasca2515
@albertogasca2515 7 месяцев назад
thanks
@MohammedLamini-ob9go
@MohammedLamini-ob9go 8 месяцев назад
i love that
@jennybrown5726
@jennybrown5726 Год назад
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?
@AutodidactEngineer
@AutodidactEngineer Год назад
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?
@repairlab14
@repairlab14 Год назад
Depends on your luck. )))
@akamasseganhoutode9694
@akamasseganhoutode9694 Год назад
Bonjour
@daliborjukic7039
@daliborjukic7039 Год назад
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
@repairlab14
@repairlab14 Год назад
Yes, you can
@pv.chalapathirao4581
@pv.chalapathirao4581 2 года назад
ThankyouSir🙏🇮🇳
@mohamadraja5549
@mohamadraja5549 2 года назад
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
@repairlab14
@repairlab14 2 года назад
Thank you. I am in the process of learning the language, in the future the videos will be with voice.
@lucasrocha4329
@lucasrocha4329 Год назад
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 ?
@repairlab14
@repairlab14 Год назад
Sometimes the IC on the control board fails on its own.
@lucasrocha4329
@lucasrocha4329 Год назад
@@repairlab14 The fan try to rotate . However, it moves too much small and i don't have 24v in this line.
@repairlab14
@repairlab14 Год назад
@@lucasrocha4329 A short circuit on the 24V line and the power supply does not start due to overload, or the IC is powered off from the secondary circuit
@wallization
@wallization 10 месяцев назад
Hi RepairLab14, do you have the diagram for this welder? thanks in advance
@imagination2141
@imagination2141 9 месяцев назад
I have mesin welding .no out put how to refair
@patelrajeshbhai9909
@patelrajeshbhai9909 2 года назад
Good
@smoke_stackz3168
@smoke_stackz3168 Год назад
I got the problem it sparks but too weak
@balaramvishwakarma3253
@balaramvishwakarma3253 2 года назад
Hii can you share 400amp welding machine control card circuit diagram ???
@dharamveersharma573
@dharamveersharma573 7 месяцев назад
Ye transitor nihi ha yo kya karen
@mohd.shahid4968
@mohd.shahid4968 7 месяцев назад
Sir hindi main batayen please
@smoke_stackz3168
@smoke_stackz3168 Год назад
Sg3525 ur ic?
@repairlab14
@repairlab14 Год назад
Maybe operational amplifier LM358
@zenamaghchouch2956
@zenamaghchouch2956 Год назад
What’s your address?
@repairlab14
@repairlab14 Год назад
61°15'07.9"N 73°20'41.1"E ;)
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