{1071} SMPS low output, fluctuating, Tik tik sound
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- Опубліковано 4 жов 2024
- In this video number {1071} SMPS low output, fluctuating, Tik tik sound. I explained how to repair 12 volt, 10 ampere 120 watt switch mode power supply. it was not turning on, and it was providing click sounds. after troubleshooting i detected 1N4744 zener diode, PC817 optocoupler. asfter replacing faulty parts, the power supply started working
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#smps #fluctuating #notworking - Наука та технологія
Nice to see that bad cap explode. Very entertaining. It didn't deserve to remain in one piece. Not only did it rest in peace (RIP) but also rest in pieces haha! In the past I've fixed many 80's computer monitors (especially by Commodore) and one common problem was bad capacitors causing a ticking sound. Do you know which part was making the ticking sound? I suspect it was that cap.
Hahahhaha 😅😅
It becomes frightening condition when it produces a blast sound with smoke
More horrible situation is that when we poke test lead on PCB and there is this type of disaster and we aren't mentally prepared for this unforeseen event
In first moment it makes us crazy 🤣🤣
Tik tik sond i think from high frequency transformer because there was short circuit due to parallel zener diode
So voltage weren't passing to the capacitor
@@HaseebElectronicsdo you know why the capacitor blew up?
@@g4z-kb7ct because there was huge fluctuation after removing short ciruited zener 1n4741 and feedback loop was inactive due to optocoupler failure
Then all spikes reached to this weak capacitor, this capacitor was also near to its last life stage
When it is old its ESR increases, causes to increase itnernal temperature
It was unable to handle those large pumping spikes
It is my opinion
May be right or may wrong....
@HaseebElectronics
Dear brother Haseeb
I need your help, I have solar transformer where I by accident reversed polarity of the incoming lines from the solar panels, smoke and bang sound,
I opened it and found two resistors blown, my problem is I can't tell the rating of the big resistors!
well this is why its a good idea to wear protective glasses,because if something pops,it wont take out your eye...I remember the first time i was taking measures on a tv psu,and the mosfet expoded,i was scared to death...lol@@HaseebElectronics
May Allah reward you for your generosity, you teaching us for free.
From Somalia, Ramadan kareem ❤❤
Allah bless you and your family
Ramadan Mubaarak
Selamalaikum from Bosnia. May Allah almighy reward you for your effort. You are of great help.
wa alaikum salaam
thanks a lot dear
please accept my best regards
I am the one your subscriber, i almost followed eletronics, specially airconboard. Alway watching from philippines
Keep reparing these SMPS'ses, this is so nice to see all possible different problems. Output diode was also my first reaction, but then I should have know it without oscilloscope. Here you see experience speaks ...
Many Thanks Brother
Very good information sir ❤❤❤❤original diode....great teacher in the world 🎉🎉🎉🎉
Thanks and welcome
Saludos desde PERÚ 🇵🇪sudamerica, excelente video gracias. 👍
Pěkná práce 👍🏻 dnes dokonce i kouřové efekty 😂 děkuji
Ano. zvuk kouře a výbuchu nám říká, že "obvod funguje" hahahahaha
thank you very much sir...
As always very useful repair video. Thank you very much for sharing your experience.
From Bangladesh love you Sir ❤
thanks a lot dear brother
Always on alert for a new video.
From Uganda.
Thanks for sharing
thanks a lot
it is my pleasure
God bless you you just help me solved my problem
it is my pleasure
God Bless You
Thanks for that effort brother.. i followed you from 1
best regards and special thanks
Excellent thanks for sharing this informative video keep sharing
nice tutorial sir
Many many thanks
Wish you happy ramzan month for your good future and healthy thanks
Morgan Herr Haseeb..supper
Without zener diode working its not any issue good help full video thanks for share
please check my newest video number 1071A
i explained it in detail
Very nice information. Thank you sir.
Most welcome
شكرا
Cordiali ringraziamenti per il tuo video. 🙏👍
piacere mio. grazie per le tue preziose parole
رمضان مبارك
جزاك الله خير
Waah ustad
most welcome
Thanks
Thank u so much God bless you.
best regards
Nice work and share!!! Thank you. 👌
it is my pleasure
i am fan for you work sir
Me too
👍😊great work
thanks a lot
I like that thick brush you use to clean dust from the board. It’s not a paint brush. Must be a special type of brush.
it is parts cleaning tool brush with soft bristle
it is available at online seller websites and tool stores
اشكرك tools name please?
Thank you for another good video. But how did you know , you should check the zener diode? Which were symptoms? Or only your experience?
Sir Mera request hai ki ek BMS. Battery management system per ek video banaen. With theory base per. Please sir
Very nice video sir 1n4148 zinar pe Ek video sir please🙏🏻🙏🏻
Perfect 👍
Thank you sir 🙏
Most welcome
Interesting.
I wish Haseeb lived in the US :/
special thanks for your Love, stay blessed
ua-cam.com/video/7l0eHOA_DVU/v-deo.html
Vale la pena ese multímetro?? Otro me dijo murió en menos de un año ,gracias
Great work 👏! Without zener diode smps would working properly?
thanks a lot
please check this detailed video ua-cam.com/video/7l0eHOA_DVU/v-deo.html
Salam M Haseeb, very nice and scary video, very useful to see how to check opto coupler. How come the circuit is apprently working nice and smooth without zener ?
Ramada Moubarak Said from Morocco Dear Brother.
wa alaikum salaam brother
happy ramadan
please check this detailed video ua-cam.com/video/7l0eHOA_DVU/v-deo.html
Thanks good video. i have one question. What does a 1n4741 zener diode do? Why does it work even without it?
please check a detailed answer in following video
ua-cam.com/video/7l0eHOA_DVU/v-deo.html
@@HaseebElectronics Thanks!
5:07 what did you say in Urdu ?
و كل عام وانت بالف خير بمناسبة حلول شهر رمضان المبارك
i said یہ ٹھیک نہیں ہے۔
it is not good
@@HaseebElectronics شكرا للتوضيح
In a similar situation, I changed the optocoupler, Schottky rectifier diodes and even TL431 - no result. And the cause of the malfunction was a faulty variable resistor (never failed) near LED, which turned 2.2 Kohm into 1 Kohm. How is that? - I don't know. I replaced it with a 470 ohm permanent resistor, selected the nominal value. The output voltage has become 12.1 volts and the SMPS is still working fine.
Can something happen that is impossible? - it can happen.
Sir, I hope you are doing well. I have been facing problem with my pc power supply. The problem is mainly a buzzing sound when the power is introduced to the power supply and the buzzing sound increases when a load is given to it. How can I ge rid off this problem?
Sir, I am from India, kindly tell my about your de soldering pump.
most welcome dear
it is WELLER WR3M rework station
www.indiamart.com/proddetail/weller-wr3000m-3-channel-rework-station-set-t0053368699n-21423948012.html?pos=4&kwd=weller%20wr3m&tags=BA||||7774.041|Price|product|||TS|type=attr=1|attrS|br
Salaam brother i have 12 volt 10 ampere smps, i want to replace the filter out put capacitor to higher voltage, but upon checking it seems to have only one filter output capacitor, the value is 16 volt 680 micro farad, though there are are other four identical capacitors but are not connected directly, they only have common connection on negative output. Thanks
Sir, Why you didn't put the zener diode back?🤔.
please check this detailed video ua-cam.com/video/7l0eHOA_DVU/v-deo.html
@@HaseebElectronics i watched the video❤️
How to check ic without data sheet but only multimeter can you explain sir.how can we measure in voltage mode .
it is really difficult question,
Ok sir.but sir i want to know which common ground in secondary or output.to measure voltage.does polarise capacitor is common ground for input and output to measure any components voltage please help sir
Dear Haseeb, السلام عليكم you did not replace the diode (1N4148).
و علیکم السلام و رحمۃ اللہ و برکاتہ
It is 1N5744 zener diode
I forgot to explain
In today's video it is explained in details
I will suggest to watch upcoming video number 1071A on 10:00 AM Pakistan time
@@HaseebElectronicsThank you for prompt reply, great work.
How to buy this resolder machine
it is WELLER WR3M rework station
you can purchase online from
www.indiamart.com/proddetail/weller-wr3000m-3-channel-rework-station-set-t0053368699n-21423948012.html?pos=4&kwd=weller%20wr3m&tags=BA||||7774.041|Price|product|||TS|type=attr=1|attrS|br
@@HaseebElectronics 350000 price 🙄
Schematic diagram where can get
you can download datasheet
and in the datasheet you can find sample circuit. the sample circuit is almost very closer to the circuits. and it gives a clear concept of working of that ic
👍
After coupler connection feedback
No TL431 ?
TL431 found good. it was a really amazing.
i think it was material failure of optocoupler resulting open circuit.
if it was due to overcurrent, then TL431 must damage with optocoupler
Sir can you repair my desktop power supply for me
I am in Jordan
If you can send it to me i will repair for you. No problem for me
Just check shipping cost
and send me model number of the power aupply
I will check from courier here in jordan. Will they despatch it back to your location or not?
If it will ok to send then you can send as parcel to me
Why sound
it is due to short circuit in secondary side. it is transformer saturation
too many mistakes in the video
what are that mistakes, it was much better to indicate.
stay blessed dear brother
please check this video
ua-cam.com/video/7l0eHOA_DVU/v-deo.html
I will send you screen shots. Thanks for areply@@HaseebElectronics
please send to my whatsapp 00962795608616 or
gmail ashraf4ta4
Sure. @@HaseebElectronics
Thanks
thanks a lot for your valuable support