{1002B} SMPS output voltage fluctuating, unregulated output
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- Опубликовано: 3 авг 2024
- in this video number {1002B} SMPS output voltage fluctuating, unregulated output, i demonstrated how to test / troubleshoot and repair 12 volt 5 ampere 60 watt, KA3842, KA2842, KA1842, UC1842, UC2842, UC3842 UCC1842, UCC2842 or UCC3842 based flyback converter switch mode power supply, its output voltage were unregulated and fluctuating. i explained the possible reasons related to this fault condition.
SMPS Output Voltage Low and Fluctuating, SMPS Output Fluctuation. How To Repair Switch Mode Power Supply when the output voltage are less than the rated voltage and it is giving unregulated voltage, after replacing the faulty potentiometer in feedback network, the power supply started working normally.
After watching this video you can capable to:-
how to repair smps
if SMPS have fluctuating output or output voltage unregulated
#smps #output #fluctuation
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00:00 smps output voltage not regulated, fluctuating
01:06 how to test repair smps step by step
01:35 smps output fluctuating 
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Nice sir 👍👋👋
best regards and special thanks dear friend
Beautiful sharing
thanks a lot
@@HaseebElectronics well come bhai
I am trying to learn electronics from youtube and your channel is very helpful
Resp Sir! Very Nice Sir. Thank U Very Much for Nice Cooperation Sir. -- -- ChinnaRao PADERU Andhrapradesh
The king haseeb electronic.👍❤️
I was surprised to see Nichicon capacitors go bad, but might be fakes even though they have a good name on them. There is a "Mr. Carlson's Lab" video where he disassembled two capacitors, both have a good brand name, I think it was Nichicon, and you can see a big difference in size between the counterfeit capacitor and the good one. I'd like to build his leakage detector, but in the mean time I use a micro amp meter in series as I slowly increase the voltage with a variable transformer. Electrolytic capacitors always have SOME leakage, but it's in the range of about 10 micro amps after they are fully charged. Pretty cool watching how the needle jumps around quite a bit, even on a good capacitor. Thanks for sharing these SMPS'S with us! Always job security with as many of these that are out there.
Beautifully done! Thanks
best regards and special thanks
Excellent thanks for sharing
best regards
As salam u Alaikum bhai
Khariyat bhai
wa alaikum salaam
yes i am fine and hope that you are also good
@@HaseebElectronics yes i am also fine
Super explain Sr ❤❤❤
Thanks and welcome
Emeğinize sağlık hocam
değerli sözleriniz için çok teşekkür ederim
I would like to share something i learned about capacitors, if you have 1 UF 35v and you want to replace it with the same rating you need to pay attention to all the details such as esr and low impedance and its more expensive, its the same rating 1UF 35V but you will see some marking on it, and by checking the datasheet you will know if its completely the same or there or its different. If you are repairing some expensive industrial power supply or any other expensive things make sure you put the same cap. This is what i wanted to add. Thank you
Sir first of all, thanks for all your informative videos, Sir what is the cause of blowing the capacitor here?
Very nice. Thank you sir.
Thanks for another great video
Nice information video 📹 👌
Beautiful share thanks 🙏
Nice sir👍
BRATE bio sam na odmoru u bolnici.Moram da kazem da mi sesviđaju praktična izlaganja
Hello Mr Haseeb. Is it not better to use more capacitors in parallel to have a lower ESR?
yes, you are right.
thank you
You're welcome
the only thing. which you certainly know, the overall ESR will be slightly higher now due to parallel resistance of the 4 caps ESR vs 2 caps ESR. but it wil probably be fine especially if the new caps are a quality brand name
Dear Sir, many of your videos feature such power supplies (rectangular, adjustable voltage, 12V, 5A, 60W). May I ask what application they are used in (battery charging perhaps)?
👍
Knowledgeable vedeo. But why use manufacturers 04 capacitor in parallel when single or double capacitor same Microfrade can solve the purpose. Pls clear this.
Good work! Do you test under load?
I have a power supply that makes the correct voltages until it is loaded.
Selamün aleyküm haseeb hocam. Yayınlar için teşekkürler. İki kondansatör kullanmak uzun dönemde fazla yüklenmeden dolayı kolay hasar görür mü? Kapasitörleri bozan belli başlı faktörler nelerdir? Allah'a emanet olun.
hoş geldin sevgili kardeşim. kapasitans değeri aynı olduğunda aşırı yüklenmeyecektir. sadece dahili ESR değeri biraz yüksek olabilir. 4 kondansatör, her biri paralel 1000uf ve ben 2200uf paralel kullandım, sonuçta kapasitans 4400uf civarında olacak ama ESR'de ufak bir artış olabilir ama herhangi bir sorun yaratmayacağını düşünüyorum
I have the same problem here... I leave things lying around piled up and they start multiplying then there are more appearing from nowhere hehe!
I think its gonna be better to have 4 capacitors, because all the stress goes to those 2, but if u have 4 its divied equally among them and they can store power more effeciently
Pl.sir request leser printer power suply dagram explain.
Surprised that the output was fluctuating so much whilst not supplying any current - had the circuit been under load I wouldn't have been surprised - the capacitors weren't anywhere near as bad as I expected them to be maybe they fail more under the higher voltage when in circuit?
Great tutorial, already like comment subscribe.
I'm from Indonesia, I have a problem with the SMPS on the "ANJING" brand battery charger made in China using IC UC3842B on leg 7 (imput) with a voltage of 12 - 14 VDC, on leg 6 (output) there is a pulsating voltage of 0,5 - 1.5 VDC which goes to the MOSFET gate 7N65, on the drain leg the voltage is 210 vdc connected to the transformer leg, primary Elko voltage 320vdc, output 0 vdc, where do you think the problem is sir? I removed and checked several important components in the primary and secondary which had normal values...
In this conditions, is the UC3842B still normal or is there a problem? Thank You
Can you help me with Circuit schematics for capacitor scr and zener cap dump
I almost always prefer to have more capacitors in parallel . You have 2 good capacitors 1000uF/16V. So you can achieve 6400uF/16V
When two caps are found out of tolerance/failed it is good practice to replace all of them because the other two will fail soon. They are your typical badly made cheap chinese caps from early 2000's that have known issues with bulging.
@@g4z-kb7ct "...it is good practice to replace all of them ......" agree
4000mf
pcb smoke
Hiiii sir how are you
thanks brother. i am good and hope that you are also good
Hii big fan..0H=Q0F IC SOT 23-6 (6PIN) WHAT IS THIS IC BROTHER I can't find it
i tried to find but i cannot find any relevant data for SOT-23-6 package
www.smdmark.com/zh-CN/search/code?id=OH
www.smdmark.com/zh-CN/search/code?id=0H
My Name is Warsito, from Indonesia, if the part no of IC ,was erase, what part no we can use.. ex : out put 24 Volt 3 A.
Hocam Türkçe alt yazı, yapmamışsın izleyemiyorum
Türkçe altyazıyı zaten ekledim
Haseeb sir apka Whatsapp number milega
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