This was an excellent video - very well explained. I had a shorted capacitor that was heating up the thermistor rapidly - pretty much exactly as described. When I took a suspect IGBT off the board it tested faulty and the machine turned on. Superb, thank you!!
I’ve had to repair so many of these for clients. I normally only do industrial repair and metrology related stuff for big factories and research labs…… but a lot of Friends/acquaintances/customers have bought one of the smaller cheap machines to weld at home or to start learning. I’ve been impressed with the quality of even some of the cheapest machines. I think they are perfect for most people, it’s just important to remember a few A few things. If the machine does not have a proper System to monitor temperature and cut out… A lot of new people who are learning don’t understand about proper “duty cycle.” So the most important thing….. is that if you have a smaller cheap welder and it does not have MULTIPLE points of thermal monitoring and cut out, you can still do something about it and make it a lot safer. Just buy one of the cheap $5-$10 thermal cut out power/outlet adapters on eBay….. and plug it into that first so that if it does overheat, it will cut out before it starts to explode. Just place the thermistor/temperature sensor in the welder at the hottest place inside the welder which is usually somewhere around the heat sinks and bulk capacitors. Some of the ones available on eBay and Alibaba have two or three different temperature monitoring sensors that come with them. Giving you the ability to monitor the temperature at multiple places inside the machine. And then it will cut out automatically so that you don’t have to worry about constantly watching your duty cycle/welding time. Because if it doesn’t have a way to monitor the temperature and cut power, and you don’t watch the proper duty cycle and thermal management REALLY CLOSELY, it will make a very loud bang and smoke for a little bit. Hopefully it won’t take out half of the circuitry inside and it will be repairable but it’s just easier to monitor the temperature from the beginning
really great and valuable points for equipment safety actually, many manufacturers who don't care abut their brand name's reputation OR some cheaters produce low quality items with some known brand name, which causes the loss for the end user. it is a huge loss for equipment and it oversees the human safety otherwise, at production level, if all safeties and protections are incorporated, that will make it long life and safe
Very informative video, I learned a lot of logical troubleshooting approach on SMPS from you thru your videos. Keep it up and you just earn another subscriber from me.
Great teacher, I have been watching your tutorials for long and I have learnt from you. Please sir what makes igbt to burnt when replaced in welding machine
Excellent explanation. So if low voltage supply is not working then capacitor will not reach full charge, or if NTC or PTC blows open nothing will work, if ntc or ptc go short then other parts will be damaged.
If low voltage power supply stops functioning The bypass relay will not turn on and all the current will pass through ntc / ptc Which will cause to blast ptc (if there is ptc then its resistance will increase while the resistance of ntc will decrease with rise in temperature) In both cases the ptc / ntc may damage In upcoming sereis of welding machine repair i will try to cover all possibilities in full details
Good tutorial thanks for sharing but I have a challenge on how to calculate the value of the capacitor usually placed between the heat sink of every full bridge inverter and what is their function and some times you see four of them kindly explain in detail
@@HaseebElectronics sir I have another challenge on how to select the value of NTC thermistor and also when do we use either PT. or NTC thermistor. Thanks
Assalamualaikum sir. I have an inverter welding machine when turning on after a while the ptc heats up and the machine turns off then keeps turning on and off. I checked most parts of the circuit I didnt find any short circuit niether the mosfet nor IGBTs. I dont know what is the reason for this heat up ptc( 115 ohm ). I replaced the relay but same. The bypass circuit is before the bridge rectifire it works properly. The machine output is ok when turning on. I tried to replace this ptc with ntc it worked properly but after several time turning in and off the ntc blown up Sir if you can help
Hi Mr , I have a question ، i placed an ntc thermistor in a wheatstone bridge , and it gave me a totally non linear curve including a negative voltage ,it goes like 0°=4V , 10°= 3.5V , 20°= 1.5V , 40°=0.5V , 60°= -0.5V , 80°= -1V , 100°= -1.2V So how can I make it linear to complete the process of display it and so on .
Salam alykom haseeb thanks for the videos, i have a problem once i start welding i see the first spark and yellow light turn on ( over heat protection) the machine had a faulty igbt i changed them and fan is working again. Can you point out how to test the overheat circuit or do you have a video for it? When i restart the yellow lights goes off bit again first spark then it turns on.
Please make video on power supply why my DVDsony DAV DZ 151kb power supply is given over voltage on one pin in place of 6 i have found 8 .2 volt and when I connect connector with mother board my 3.3 volt is missing and voltage of 6 volt which is 9 volt in my MOSFET is drop half
@@HaseebElectronics سلام استاد عزیز. نتوانستم یافت کنم لینک دانلود را. آیا من اشتباه میکنم؟ لطفا مشخص کنید کدام لینک هست. منظور من شماتیکی هست که در ویدیو دیده شده است. بسیار ممنون از اینکه به ببیندگان خود پاسخ گذار هستین
Assalamo alaykum warahmatullah alaykum,sir once have send me ackt diagram of Acer monitor to me i lost it pls make me study about fault finding procedure as well with ckt daigram.
![Shenseea - Dating Szn (Options) [Official Music Video]](http://i.ytimg.com/vi/eUePmZFIXUg/mqdefault.jpg)
الله يعطيك الف عافية
الله يسلمك و یسعدک و یبارک فی عمرک
باسلام
ازتماشای ویدیوهای بسیار مفیدشما گاها استفاده کرده لذت میبرم .باتسکرهمکارشما
Absolutely impressed by your simple way explaining this PTC function and fail . I will definitely check the other components. Thanks a million.
it is my pleasure
please accept my best regards ans special thanks for your beautiful encouraging comment
This was an excellent video - very well explained. I had a shorted capacitor that was heating up the thermistor rapidly - pretty much exactly as described. When I took a suspect IGBT off the board it tested faulty and the machine turned on. Superb, thank you!!
Perfektne vysvetlené ďakujem.
Pozdravujem zo Slovenska
I’ve had to repair so many of these for clients. I normally only do industrial repair and metrology related stuff for big factories and research labs…… but a lot of Friends/acquaintances/customers have bought one of the smaller cheap machines to weld at home or to start learning. I’ve been impressed with the quality of even some of the cheapest machines. I think they are perfect for most people, it’s just important to remember a few A few things.
If the machine does not have a proper System to monitor temperature and cut out…
A lot of new people who are learning don’t understand about proper “duty cycle.”
So the most important thing….. is that if you have a smaller cheap welder and it does not have MULTIPLE points of thermal monitoring and cut out, you can still do something about it and make it a lot safer.
Just buy one of the cheap $5-$10 thermal cut out power/outlet adapters on eBay….. and plug it into that first so that if it does overheat, it will cut out before it starts to explode.
Just place the thermistor/temperature sensor in the welder at the hottest place inside the welder which is usually somewhere around the heat sinks and bulk capacitors.
Some of the ones available on eBay and Alibaba have two or three different temperature monitoring sensors that come with them. Giving you the ability to monitor the temperature at multiple places inside the machine. And then it will cut out automatically so that you don’t have to worry about constantly watching your duty cycle/welding time. Because if it doesn’t have a way to monitor the temperature and cut power, and you don’t watch the proper duty cycle and thermal management REALLY CLOSELY, it will make a very loud bang and smoke for a little bit. Hopefully it won’t take out half of the circuitry inside and it will be repairable but it’s just easier to monitor the temperature from the beginning
really great and valuable points for equipment safety
actually, many manufacturers who don't care abut their brand name's reputation OR some cheaters produce low quality items with some known brand name,
which causes the loss for the end user. it is a huge loss for equipment and it oversees the human safety
otherwise, at production level, if all safeties and protections are incorporated, that will make it long life and safe
👍
@@HaseebElectronics 👍
Exelente video, retire los IGBT y la máquina encendió 💯
Wow that's awesome excellent uploading great job best wishes super Like your great skills work good morning 🌅🌻🌹
thanks a lot
Excellent as always. Thank you for all you do.
My pleasure!
Very well explained and easy to follow thank-you 😁
You’re welcome 😊
Sir, Namaste So kind of You for Adding a Knowledgeable Video .. with Regards,,.. Sreekanth, Hyderabad- India
thanks a lot dear brother 💗
Very informative vedeo. All videos are very informative and nicely explained. God bless you. Thank u so much.
It's my pleasure
Excellent explain well done, good luck 👍👍💕
thanks a lot
Wonderful video dear friend!!!
Many thanks
Excellent and very useful sir
Thanks and welcome
I hope you will translate all the videos. For everyone to understand
I will try to add translation
ان شاءالله
Check haseeb electronic urdu
Very informative video, I learned a lot of logical troubleshooting approach on SMPS from you thru your videos. Keep it up and you just earn another subscriber from me.
Subha Bakher Ho Janab Bhai Saab
thanks a lot bhai
جزاك الله وبارك فيك على شرح وشكراللك
Great teacher, I have been watching your tutorials for long and I have learnt from you. Please sir what makes igbt to burnt when replaced in welding machine
thanks for the video, very interesting.. greetings from Croatia!!
Excellent explanation. So if low voltage supply is not working then capacitor will not reach full charge, or if NTC or PTC blows open nothing will work, if ntc or ptc go short then other parts will be damaged.
If low voltage power supply stops functioning
The bypass relay will not turn on and all the current will pass through ntc / ptc
Which will cause to blast ptc (if there is ptc then its resistance will increase while the resistance of ntc will decrease with rise in temperature)
In both cases the ptc / ntc may damage
In upcoming sereis of welding machine repair i will try to cover all possibilities in full details
I love this channel
Very good video!!
Thank you very much!
Barak allahw fika brother
כל הכבוד יש תרגום לעיברית
Very good and useful information sir thanks for sharing this knowledge to us
So nice of you
Very useful video sir
most welcome
thanks! ..please do more videos about welding machines repairs
sure i will try to do more videos
Good topic 👍👍👋👋
best regards and lovely thanks dear friend
Excellent
Thankyou
Are you engineer?
Yes I am
Wow amazing beautiful shirng dear friend 🌹👍
Excellent explain thanks for sharing this informative video bahi
Always welcome
GOOD TICHING KARTE HO AP THANKS 👌🌹👌🌹😆😂😆
Thank you a lot of amazing and wonderful 💐 please please
Thanks and welcome
Thank sir , i learn a lot from your video
Thank you very much sir 🙏🙏🙏
Most welcome dear ❣️
Good video
Sir please I have a question what will be the fault of if you want to plug inverter welding in electric it will bridge immediately
وعليكم الف سلام -- شكرا جزيلا--
informative video, many thanks sir :)
best regards
ماشاءاللّٰه sir
Sir 3 phase make video over inverter
okay brother i will see it
Good video, thanks mate
it is my pleasure
Great jobs,
best regards
Have a nice day best job
بہت شکریہ
Hello sir, pls can I get this circuit diagram?
Sir well job keep it up ❤
Thanks a lot
stay blessed
Great video! But where can I find those schematics?
Good tutorial thanks for sharing but I have a challenge on how to calculate the value of the capacitor usually placed between the heat sink of every full bridge inverter and what is their function and some times you see four of them kindly explain in detail
@@HaseebElectronics okay sir please check I really need and that of half bridge inverter calculation
@@HaseebElectronics sir I have another challenge on how to select the value of NTC thermistor and also when do we use either PT. or NTC thermistor. Thanks
I have mechanic icharge 8 max not working, i find NTC burn, i dont know the model number i can replace! How i can find correct NTC?
Led lcd power supply 12v output line giving 24v insteady why? Zambia
Please what to trouble shoot if voltage is not getting through from bridge rectifier
beauatiful sharing
Thank you so much 🙂
Assalamualaikum sir.
I have an inverter welding machine when turning on after a while the ptc heats up and the machine turns off then keeps turning on and off. I checked most parts of the circuit I didnt find any short circuit niether the mosfet nor IGBTs. I dont know what is the reason for this heat up ptc( 115 ohm ). I replaced the relay but same. The bypass circuit is before the bridge rectifire it works properly. The machine output is ok when turning on. I tried to replace this ptc with ntc it worked properly but after several time turning in and off the ntc blown up
Sir if you can help
thank you a lot wonderful
Most welcome
Good topic
it is my pleasure
Good sharing bai
Many many thanks dear sister
جزاك الله خيرا شرح جميل جدا.
Hasseb भाई हिन्दी मे भी वीडियो डाला करे जो आपकी इंग्लिश chennal मे है वो सारे
हां भाई हर वीडियो शेयर कर रहा हूं, कोशिश करूंगा कि रोज दोपहर 1:00 बजे शेयर करूं
Hello friend, what value of NTC thermistor for welding inverter is used?
Hi Mr ,
I have a question ، i placed an ntc thermistor in a wheatstone bridge , and it gave me a totally non linear curve including a negative voltage ,it goes like
0°=4V , 10°= 3.5V , 20°= 1.5V , 40°=0.5V , 60°= -0.5V , 80°= -1V ,
100°= -1.2V
So how can I make it linear to complete the process of display it and so on .
Salam alykom haseeb thanks for the videos, i have a problem once i start welding i see the first spark and yellow light turn on ( over heat protection) the machine had a faulty igbt i changed them and fan is working again. Can you point out how to test the overheat circuit or do you have a video for it? When i restart the yellow lights goes off bit again first spark then it turns on.
Please make video on power supply why my DVDsony DAV DZ 151kb power supply is given over voltage on one pin in place of 6 i have found 8 .2 volt and when I connect connector with mother board my 3.3 volt is missing and voltage of 6 volt which is 9 volt in my MOSFET is drop half
Asslam o Alikum Sir
Any video available (5000W inverter detail Circuit) or any docx file.
Plz Kindly I need 5000W inverter circuit video or docx file
i wait for your video
yes brother
i will arrange it very soon.
إن شــاء الله
May Allah Pak bless you جزاک اللّٰه
Hi man i need your paper ..i mean your welding diagram . Can you converted to the pdf file . And share it
Pls
thankful🙏🙏🙏🙏🙏
best regards
سلام استاد. آیا میشود که این مدار را قرار بزارین تا بشود ما هم داشته باشیم. همان شماتیک ماشین جوش را میگویم
ممنونم استاد بزرگ
السلام عليكم ورحمة ٱلله وبركاته
بله برادر من نمودار را اضافه کردم، لینک در توضیحات ویدیو است. لطفا توضیحات ویدیو را بررسی کنید و آن را دانلود کنید
@@HaseebElectronics سلام استاد عزیز. نتوانستم یافت کنم لینک دانلود را. آیا من اشتباه میکنم؟ لطفا مشخص کنید کدام لینک هست. منظور من شماتیکی هست که در ویدیو دیده شده است. بسیار ممنون از اینکه به ببیندگان خود پاسخ گذار هستین
bit.ly/3xASWkA
لطفا اگر دانلود کردید جواب بدید
@@HaseebElectronics سلام استاد. بله توانستم دریافت بگیرم . خیلی توجه دارین . ممنونم
Sub. 👍. My ntc green is 3 ohm and on caps only 160v .what issue ntc?
220v system
it depends on ambient temerature, current rating, chip size, capacitor size
Assalamo alaykum warahmatullah alaykum,sir once have send me ackt diagram of Acer monitor to me i lost it pls make me study about fault finding procedure as well with ckt daigram.
🇹🇷Es Selamun aleykum ve rahmetullahu ve beberakatuhu. brother.🇵🇰🇵🇰🇵🇰
وعليكم السلام ورحمة الله وبركاته
Sir sine wave inverter kistarase Kam karte he details video chahiye
👍
❤
Lk 56 brother 👍👍
thanks a lot dear sister
Plz Sir Kindly share the Circuit file
How do order the smd transistor A4GG ?
Mashallah
الحمدللہ
السلام عليكم هل يمككنني التواصل معك؟
و عليكم سلام و رحمة الله و بركاته. كل عام و أنتم بخير.
نعم ، رقم واتساب 00962791161084
و gmail هو ashraf4ta4
@@HaseebElectronics وانتم بالف خير عيد سعيد علينا و عليكم
👌👌👌👍
best regards
ما شاء الله
thanks a lot
Ok❤❤❤❤❤iran
😊👍🙏
it is my pleasure
Hello Sir I'm your follower of welding machine reaper can you send of schematic diagram of yamato MMA 300 and the others machine in my email
pagol khana
Hello sir, pls can I get this circuit diagram?