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BRO Q1,Q2,Q3,Q4 TRANSISTER VALUE?

Здравствуйте. Этот канал для англоязычных)

In case you are wondering what is VRD, let me help you. VRD simply means Voltage Reduction Device. This is a safety mechanism that is put in place in a welding machine to prevent accidental electrocution when the machine is not actively welding. When the welding machine is turned on but not actively welding, the VRD automatically lowers the Open Circuit Voltage also simply referred to as OCV, to a safe level, typically around 15V or less. As soon as the welder starts welding and forms a closed electrical circuit, the VRD deactivates, allowing the OCV to rise to its maximum level to establish a stable arc. VRD is especially important when welding in damp, humid, or confined spaces where the risk of electric shock is higher.

Very nice video

How many voltage out this plant

Киргуду? Их бин херр… извините за мой немецгий :)

Нехер его трогать. На скорость не влияет. И на ток. И на надежность too.

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

Sir hindi main batayen please

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

thanks

Ye transitor nihi ha yo kya karen

Am un bester 190c am eroare f01ce poate fi

i love that

I have mesin welding .no out put how to refair

I have a Lincoln Electric LE31MP that blew up, and I'm trying to repair it. The low power supply UC3842/MOSFET/resistor blown-shorted. Replaced all these, and relay turns on and fans work, but still nothing else works. IGBTs/diodes are OK. There is also a UC3843 and MOSFET next to the low power supply. That MOSFET seems OK. Any recommendation, what to check?

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

Hello Brother. I experienced a problem with my inverter welding machine, my machine uses a 2s forward system, after I analyzed the IGBT and soft start the resistor burned out, and after I checked the signal entering the GDT transformer, the square wave was only 17% and resulted in an over current/overheat indicator lights up when the welding wire is attached, for problems like this which part must be analyzed. Thank You.

I have a miller 161 sth machine that has no weld output, can it be fixed?

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

May God continue blessing you with your knowledge, sir what is the issue for inverter welding machine 300a, know output voltage, and the right is ok, and I have change the card, same issue know output voltage.

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?

there Nice equipment fast & quick repair........

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

Buenas noches desde Colombia, hasta ahora encuentro su canal y es muy interesante su trabajo, tambièn me dedico a las reparaciones de estas màquinas y todo el tiempo se aprende, estoy recopilando informaciòn valiosa como èsta, muchas gracias por compartir su experiencia.

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

I enjoy watching your great electrical skills.Did you ever see inverter a “Mustang 320A “?It is seeling in Serbia,Hungary,Croatia and surround countries.Think to buy it. My question is whats max current of that device ?This “320” is sa trick and stupidity cause none monophase welding maschine cant produce more than 200A.Спасиба, Милош

Great video ,like the others 😊This current metter,is it amper clamp ?

Bonjour

Great job, thanks for the example.

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 ?

Great work

sir VRD work what ??

superb teacher amazing

Thank you so much for sharing your knowledge

Your all video's amazing

👍

Sir with respect if you have diagram of any welding inverter pl send me thanks sir

Russian акцент. )))(

Can we weld or patch thin ms sheets with this machine

Subbed. Good welding machine repair videos are what I've been looking for quite a while. Please continue uploading more videos. I'll keep watching, liking and commenting. Cheers