Very good information as always. I have a car battery charger with the same IC so this is even more valuable information for me. It failed once and it was a shorted MOSFET blowing the fuse.
Salam, interesting video, i was waiting to see a shorted component, but surprisingly, an open resistor created that shorted-like situation with the mosfet. Thank you for the explanations ! Excellent, as usual. Salam aleikum.
wa alaikum salaam dear brother yes brother when a resistor is open circuit, it creates floating gate, and the floating gate causes to switch the mosfet channel
As always I learn much from you. The use of the cigarette lighter to help break the plastic bond is nice. My experience is applying force via a chisel to the corners to fracture the plastic bond. Thank you, again.
❤ to your technical videos and extreme knowledge of Electronics step by step. You are a good 👍 Instructor. Please I request you to tell us about your Multi meter you now using in your lectures and from where I can get ! Thanks.
best regards i think it is material failure, and it is the biggest issue in this SMD material. sometimes, its resistance is increased and in rare cases it becomes open circuit
best regards you can compromise with capacitance. if that circuit have PFC circuit, that the DC rail voltage will around 400 - 410 VDC. which can cause to damage the capacitor at any time if your circuit don't have PFC, and it is working on simple bridge rectifier, in that case you can use 400VDC capacitor
selamun aleykum brother. I have an smps circuit, pwm IC KA5M0380R. The zener diode connected to the FB pin of this pwm IC is burned. How can I find the voltage value of this diode. The voltage of the FB pin is 24 volts, I think, should I use a diode that will transmit after 24 volts. Thanks...
most of time this problem when MOSFET is short cirucited or SMPS controller IC is damaged. (in this situation, every component looks good in cod testing but when the power is applied, the SMPS controller saturates the power mosfet )
Hi sir....namaskaar. How can I reduce an SMPS maximum output current without any change in output voltage. Thank you for sharing this video. Good night 🙏
The faulty resistor was in series with the gate of the MOSFET . The resistor went open circuit . The MOSFET gate was then also open circuit - it was floating . This resulted in the MOSFET being on all the time .
It is pull down resistor. It's job is to discharge tiny capacitor in the gate of the mosfet. Since mosfet works with field effect, no current is flowing through gate when mosfet is turning on, so it needs a pull down resistor or the mosfet won't switch off.
Very good information as always. I have a car battery charger with the same IC so this is even more valuable information for me. It failed once and it was a shorted MOSFET blowing the fuse.
Salam, interesting video, i was waiting to see a shorted component, but surprisingly, an open resistor created that shorted-like situation with the mosfet. Thank you for the explanations ! Excellent, as usual. Salam aleikum.
wa alaikum salaam dear brother
yes brother
when a resistor is open circuit, it creates floating gate, and the floating gate causes to switch the mosfet channel
Wonderful video dear friend, have a happy Thursday ☺️
nice fault finders
Excellent thanks for sharing this informative video keep sharing
As always I learn much from you. The use of the cigarette lighter to help break the plastic bond is nice.
My experience is applying force via a chisel to the corners to fracture the plastic bond. Thank you, again.
best regards and special thanks
assalamualaikum..thanks..
haseeb, brilliant repairs. Love them. Keep them coming brother. Than😊 best repair Chanel on UA-cam
Big thanks excellent superb skills job best wishes good 👍 sharing
Very nice video. Logical, methodical strategies bring good results.
thanks a lot
Excellent Work Sir Liked it
Very good video . I liked your explanation for the reason for the fault at the end of the video .
Great video. plz look after ur video quality which was too much bright. May b lighting issue
Thanks for the detailed troubleshooting 👍👍👍👍👍
You're welcome!
Thank you so much for watching
Beautiful information. Thank you sir.
Thank you so much sharing information video good job 🌻🥀🍁🌷
Good brother
Informative vedeo. Thank you .
Good repair video!
Awesome as usual... Thank you brother...
❤ to your technical videos and extreme knowledge of Electronics step by step. You are a good 👍 Instructor. Please I request you to tell us about your Multi meter you now using in your lectures and from where I can get ! Thanks.
best regards
you can check video number 470
ua-cam.com/video/HoOR26t45Zs/v-deo.html
جزاک اللہ خیرا
اسلام علیکم ورحمتہ اللہ سر جی
مائکرو فیرڈ کیپسٹر چیک کر نے کے لئے کونسا میٹر استمعال کریں
Excellent
Thanks for sharing
Lk 42 brother 👍👍
Amazing information dear brother
Great video. Very interesting.
Thanks very much for sharing the same..........................
اللہ تعالیٰ آ پ کو عزت اور صحت والی لمبی زندگی عطا فرمائے آمین
Ottimo grazie ❤️👍
Hello Haseeb, can a ka7500 be replaced without modifying anything by a tl494 in a smps source?
yes dear
it can be replaced without any alteration
Very detailed troubleshooting process, thank you.
Do you know what causes a SMD resistor to go open? Can it be prevented ?
best regards
i think it is material failure, and it is the biggest issue in this SMD material. sometimes, its resistance is increased and in rare cases it becomes open circuit
Great job..thanks 👍
Nice repair!
Amazing video sir.. sir can i replace utc7608d with thx203h?? Some pins location are different..
Nice repair.
Thanks for an interesting video, i have a question The main DC capacitor is blown up. It is a 120uf 450v, can i replace with a 150uf 400v capacitor?
best regards
you can compromise with capacitance. if that circuit have PFC circuit, that the DC rail voltage will around 400 - 410 VDC. which can cause to damage the capacitor at any time
if your circuit don't have PFC, and it is working on simple bridge rectifier, in that case you can use 400VDC capacitor
@@HaseebElectronics thank you for the quick response, the circuit does not PFC, so im sure it will work
yes. if it dont have PFC then 220*1.41= 310VDC on dc rail
400v capacitor have a safe headroom for these voltage. so 400V is safe to use
sir, what is voltage per turn for ee55 transformer if the frequency is 100khz while b max is around 900 and input voltage is 12v?
thank you
Very interesting, as always. Sir, could you please explain how do we use separated ground in proteus? Thanks.
Good job 👍🏻 ❤❤❤
Thanks a lot ...
👌👌👌👍
selamun aleykum brother. I have an smps circuit, pwm IC KA5M0380R. The zener diode connected to the FB pin of this pwm IC is burned. How can I find the voltage value of this diode. The voltage of the FB pin is 24 volts, I think, should I use a diode that will transmit after 24 volts. Thanks...
Sir please make videos about automatic voltage stabilizers.
Repair video also
Yes it seems that we need a resistor shutdown on the gate line, no !
Sir the mosfet stays open becuase the gate drive pin is the only discharge path?
Aoa sir where did you learn it I want to start my career and become like you plz guide me
What is the reason to glow the lamp on full brightness when is there is no short circuit?
most of time this problem when MOSFET is short cirucited
or
SMPS controller IC is damaged. (in this situation, every component looks good in cod testing but when the power is applied, the SMPS controller saturates the power mosfet )
Good one....
Thanks
thanks a lot for your valuable support
@@HaseebElectronics This was great information. Thank you.
Mr Haseeb.. how can I purchase a chopper transformer for my power supply?
Nyimak malam bosku 👍🌷🌷 bosku mantap sukses selalu bosku saya ucapkan salam dahsyat!!✊🙏
Hi sir....namaskaar.
How can I reduce an SMPS maximum output current without any change in output voltage.
Thank you for sharing this video.
Good night 🙏
Sir ANENG AN113D auto option wala. Is ko repair krna b btayn. Meray pas jo multimeter hay wo AC or DC Volt ziada deta hay jb k baqi sb theek hay.
Good video
Nice.
Plese prepared induction stove
👍
what is the mosfet serial number bro?
Good information video pin 🥀🍁🌷🌹
🙏👍
👍🇹🇷👍
hi friend 👌👌👌🎄🎄🎄💖💖💖🔔🔔🎁🎁🎄🎄🎄
thanks a lot
sir, why without resistor on ic output pin caused short circuit, plz explain this phenomena in Urdu, :Ash
The faulty resistor was in series with the gate of the MOSFET . The resistor went open circuit . The MOSFET gate was then also open circuit - it was floating . This resulted in the MOSFET being on all the time .
It is pull down resistor. It's job is to discharge tiny capacitor in the gate of the mosfet. Since mosfet works with field effect, no current is flowing through gate when mosfet is turning on, so it needs a pull down resistor or the mosfet won't switch off.
Asslamalekom bhai jan aap se baate karna posibal h kiya i m indiya
salaam
Please give me a maltimetar
मुझे एक माल्टिमिटार चाहिए जो आप का आसिंबाद होगा
please send your postal address to my whatsapp 00962-79-1161084
कृपया अपना डाक पता मेरे व्हाट्सएप 00962-79-1161084 पर भेजें