{593} SMPS Have Low Output Voltage, How To Repair Switch Mode Power Supply SMPS When Low OutPut

SMPS Have Low Output Voltage, How To Repair Switch Mode Power Supply SMPS When Low OutPut Voltage. in this video i uc3842 based flyback Switch Mode Power Supply SMPS. its rated output voltage were 12 Volt and 5 volt but after failure, its 12 volt section dropped to 3 volt and 5 volt output dropped to 0.7 volt. i checked input voltage, dc rail bulk capacitor, RCD snubber and finally i found 4x output dc capacitors were internally open. after replacing the capacitors the supply started to provide its nominal output voltage. after watching this video you can capable to:-
how to #repair #smps
if SMPS have fluctuating output or output voltage unregulated
if smps have short circuit in output
how to repair laptop charger
Why SMPS Have Low Output Voltage - SMPS Output Less Than Rated Output Explained. there are many reasons for low output.
1. rcd snubber
2. mosfet
3. mosfet gate drive components
#smps #output #low
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How To Repair SMPS Switch Mode Power Supply and explained Step by Step Practical Troubleshooting. in this tutorial i explained the possible troubleshooting and fault finding techniques to find the faults in any switching mode power supply.
i shared my easiest and perfect troubleshooting techniques practical troubleshooting. smps concept and troubleshooting repairing or understanding repair switching mode power supply basics and working principle. also i discussed smps basics. after watching this video you can capable to:-
1 basic working concept of smps switch mode power supply
2. how PWM pulse width modulator work
3. block diagram of smps switch mode power supply
4. practical circuit tracing of smps
5 how to repair mobile charger
6 how to repair power supply of digital satellite receiver
7. how to repair led lcd tv power supplies
8. different faults in stages of smps
9. what is filter and protection circuit in SMPS
10 what is bridge rectifier circuit and how bridge rectifier circuit work
11 what is PWM pulse width modulator circuit and how to check it
12 function of FET, MOSFET, BJT, IGBT or switching modules
13 what is optocoupler or opto-isolator and what is its function in feedback circuit
14 what is voltage regulation and how it workks in SMPS
15 how to find problem if switch mode power supply have no output
16 what is problem when power supply have fluctuation and output is not regulated
17 current sense in smps
18 short circuit protection
19 how to test troubleshoot and repair smps switch mode power supply and easy test points in fault finding
and much more
how to #repair #smps
fuse keeps blowing
how to repair switch mode power supply when short circuit at input, fuse keeps blowing.
if SMPS is dead or no ouput. smps ic have no switching frequency,
if SMPS have fluctuating output or output voltage unregulated
if smps have short circuit in output
how to troubleshoot PWM SMPS controller when there is no switching from MOSFET
if SMPS have a whistle sound or excessive noise or excessive heat
how to repair mobile charger
how to repair computer power supply
how to repair laptop charger
how to repair inverter of solar system
how to repair UPS uninterruptible power supply
smps, repair, troubleshooting,
SMPS practical tutorial • SMPS Switching switch ...
SMPS tutorial and practical troubleshooting and fault finding • SMPS / PWM basics circ...
SAMSUNG BN44-0029a-00438 circuit diagram
drive.google.com/file/d/1mysf...
how to repair smps,
how to repair switching mode power supply,
smps practical troubleshooting tutorial,
smps switching frequency,
very easy repair of SMPS,
switching mode power supply tutorial,
basics of switching mode power supply,
smps tutorial,basic working of switching mode power supply,
how to repair switch mode power supplies,
how smps work,
how switching mode power supply works,
smps voltage fluctuation,smps output voltage fluctuation,
smps repair step by step

[@demontagemontage]

اشكرك

[@gopalraovellanki9826]

Haseeb sir thank you for sharing this video.
Your de soldering instrument is very nice.
Good night 🙏

[@HaseebElectronics]

thanks a lot
yes this de-soldering bench is Weller is WR3M

[@fuzzs8970]

I would like to to thank you again for your very nice explanation.

[@HaseebElectronics]

You are welcome!

[@qaiserqureshi100]

Masha Allah, amazingly useful content. Big like from London 🇬🇧💌

[@HaseebElectronics]

Thank you so much bhai
Eid Mubarak

[@HarlavanisPanagiotis]

Wonderful video dear friend, have a happy new week!

[@HaseebElectronics]

thanks a lot dear friend
Have a nice day

[@temyraverdana6421]

Thanks, a very useful and great lesson! see you next lesson

[@HaseebElectronics]

You are welcome!

[@asifmehmood8486]

very useful & informative video.
Thanks Haseeb electronics.

[@HaseebElectronics]

most welcome

[@susantaatha6468]

Very good informative. Thank you sir.

[@HaseebElectronics]

You are welcome

[@reed-xd8zx]

Thank you for sharing, you are a good teacher!

[@HaseebElectronics]

You are welcome!

[@vijayakumarkumar9190]

Very good and useful information sir thanks for sharing this knowledge to us

[@HaseebElectronics]

Most welcome

[@charlesmawale9114]

Missed your videos sir... Thanks for your hard work

[@HaseebElectronics]

most welcome and wish you happiness in your life
stay blessed

[@cyberghot6902]

I like all Videos😄

[@HaseebElectronics]

it is my pleasure

[@Crasy24Hours]

🙏💓pranam sirji valubal lesson continue sir 💓🙏

[@HaseebElectronics]

thanks a lot bhai

[@AaoSikhen]

Very knowledgeable information thanks for sharing। happy id bhai

[@HaseebElectronics]

special thanks dear sister
Best Eid wishes to you and your family

[@ahmedmadkour]

Nice work my brother 😍 great job 👌 give you bigger 👍 keep safe

[@HaseebElectronics]

عيد مبارك
تقبل الله صيامكم وقيامكم وصالح أعمالكم 🤲

[@techsartamil4529]

Superb,Good explanation.

[@HaseebElectronics]

i am thankful for your valuable comment
best regards

[@mtrltoolman]

Jazak Allah Khair.
Eid Mubarak.

[@HaseebElectronics]

عید مبارک
کل عام و انتم بخیر
تقبل اللہ طاعتکم

[@Kurt1968]

I have a similar SMPS where the 5V output is good but the 12V is low. I swapped out all the output capacitors with new ones. I also checked the output rectifier diodes and they are good as well. Any idea what could be causing this? All the resistors are within tolerance. Also as a side note there are two trim pots. One adjusts both output voltages and the other appears to do nothing. Do you know what a second trim pot on an SMPS is for? Perhaps to adjust overload protection limits? I can't find the schematic for it anywhere.

[@RafiqulIslam-bd4wh]

Really awesome video for learners. You shoud use english writing in your video.

[@rahulpatelgujratahmedabad3497]

Good tiching karte hai 👌👍👌👌👍👍👌

[@HaseebElectronics]

thanks a lot bhai

[@anmolnishadnishad720]

Good

[@gokerbg]

Ve Aleykum es-Selam ve berekatuhu. Thank you for your effort and Happy Ramadan holiday.

[@HaseebElectronics]

Eid Muarak & Ramadan Mubarak to you and your family
Stay blessed dear brother

[@gokerbg]

@@HaseebElectronics Thank you. ❤️💐

[@noormir1175]

Very good information

[@HaseebElectronics]

most welcome

[@rahultist]

Helpful video ❤️

[@HaseebElectronics]

thanks a lot

[@anaaielectric8691]

Good video sir 😊

[@HaseebElectronics]

Thanks and welcome

[@ARA-HOUSE]

Lk 204 brother 👍👍👍👍

[@HaseebElectronics]

Many many thanks
Eid Mubarak to You and your family
Specially to Alizeh

[@chumatez]

Nice one

[@HaseebElectronics]

thanks a lot

[@mukeshjohri2379]

Good job thanks sir ji

[@HaseebElectronics]

thanks a lot

[@diyprojects5767]

Thanks for sharing you valuable information. I have a question sir, i have a treadmill motor control board which i am repairing, the input voltage is 234v, and AC voltage on bridge rectifier is 234v but the output of the bridge rectifier is showing 210v. Where could be the problem? I replaced the rectifier but still shows the same.

[@HaseebElectronics]

please check main DC capacitor, it is surely open from inside or may be its track is open or may be some NTC or PTC is open
clear the circuit from Bridge rectifier to the main dc capacitor

[@drameriemmanuel1187]

Thanks for sharing your knowledge.how do you test ceramic capacitor in diode mode of multimeter

[@HaseebElectronics]

Good Day
i will request to watch video number 594, to get your answer. and please let me know your opinion

[@efijemuehphilip542]

Thanks for this video.It is very educative.please what is the name of the soldering iron used and can it be gotten.thanks

[@HaseebElectronics]

i am thankful dear
i have Weller WR3M Rework Station (Made in Germany)
it is around 3000USD + costly in routine maintenance & accessories
(my suggestion is get HAKKO 701 or any HAKKO brand, that is Japan Made, cheap, very low maintenance)
you can check video number 511.

[@VenkatesanS]

Like this in one of my power supply I changed the capacitor to get back 12V but when I connect a 12v fan (0.12A) voltage dropped 3.7V and the fan spins very slow. Which component would be responsible for this? Hopefully get some answer in one of your future videos.

[@rajeshkumar-tv8qk]

Nice.

[@HaseebElectronics]

special thanks

[@powerbord6002]

عالی بود استاد لذت بردیم لطفا در خصوص نحوه ولتاژ گیری با اسلیسکوپ یه توضیح بفرمایید میدونیم که در ولتاژ گیری با اسکوپ اول باید ضریب ولتاژ مناسبی را تعیین کنیم تا شکل موجملن از صفحه اسکوپ بیرون نره و بعد برای انتخاب تایم دیو یا همان زمان تناوب باید رو چه زمانی تنظیم کنیم مثلا ۲ میکرو ثانیه یا اینکه چطوری باید زمان ولتاژ پنج ولت یه کیلو هرتز را را روی اسکوپ تنظیم کنیم

[@batistafrose6009]

Nice video

[@HaseebElectronics]

i am thankful

[@apachecomm]

Thanks

[@HaseebElectronics]

most welcome

[@muruganuoorkavalan9687]

Thank you

[@HaseebElectronics]

You're welcome

[@Murshad366]

MASHALLAH
THANKS FOR SHARING

[@HaseebElectronics]

JAZAAK ALLAH KHAIR
EID MUBARAK

[@Murshad366]

@@HaseebElectronics KHAIR MUBARAK

[@electroniquepassion]

👍👍👋

[@HaseebElectronics]

thanks a lot dear friend

[@nayanjagirdar8408]

👌👌👌👍

[@HaseebElectronics]

it is my pleasure

[@user-zd3ru7dd5k]

Great video sir.
Haseeb please i have HKTS 200 SUB/230 + 210 SUB/230, the +7v and -7v are ok but the 47v output is not working, please help me out. Thank you and God bless you.

[@wenztvtech7452]

👍👍👍

[@HaseebElectronics]

special thanks

[@kameshg6034]

Hi, my 120W (12v 10A) smps output voltage good but output current very low, i am unable to use 12v 5A load even in smps no voltage fluctuation or down very stable voltage, i checked all components are good in pcb, but low output current, so what component to be replace in smps ? waiting your reply

[@electronicslover1120]

Sir g, uc3843 se max kitna power ka smps design kr sakte hai? aap ek video me bole the ki 15-18 watt, par koi koi 120watt ka bhi banye hai to vo jada din nhi chalega kya?

[@HaseebElectronics]

as this IC is used to drive single mosfet
single mosfet is used to drive flyback and boost converters. so flyback designs safe range is less than 100 watt. above 100 watt it becomes difficulty in regulation
best design with excellent control is between 10 watt to 100 watt
above 100 watt, then we need bipolar meganet designs like half bridge, push pull etc

[@electronicslover1120]

@@HaseebElectronics Thankyou very much Sir

[@jeffmanalo5752]

Hi Sir Hasseb, where did you buy your soldering iron?

[@HaseebElectronics]

I purchased locally from Jordan
it is WELLER WR3M REWORK STATION it is available online shopping sites
compare price and you an purchase it

[@jeffmanalo5752]

@@HaseebElectronics ah ok sir thanks for the info.👍👍👍

[@riyanesmail6876]

شكرا اخي عمل رائع ..ممكن تبين لي من اين اخذ تلك اداة التلحيم اللتي استخدمتها للتو في نزع قطعة الكباسيتور ..انها تبدو رائعة

[@HaseebElectronics]

جزاك الله خير
إنها WELLER WR3M rework station
صنع في المانيا.
اشتريت من الأردن من المدھون عمارۃ الصائغ العبدلی عمان
کل عام و انتم بخیر

[@riyanesmail6876]

@@HaseebElectronics شكرا اخي يعطيك العافية وعيدكم مبارك وكل عام وانتم بخير وفقك الله

[@HaseebElectronics]

@@riyanesmail6876 الله يسلمك و يسعدك
تقبل الله طاعتكم

[@abdul-q-khan]

👍

[@HaseebElectronics]

thanks a lot

[@fuzzs8970]

Asm. How are you my friend? Would it be possible to have your help to fix a power supply of mine. I kept them but even after trying a few times i couldn't find what was wrong with it. It's for an automatic door.

[@batistafrose6009]

Hello.sir EID MUBARAK

[@HaseebElectronics]

Happy Eid Mubarak to you and your family ❤️
special thanks for your Eid wishes
💕

[@adilzahidan5580]

Hello..i was trying to repair a dead small selfoscilating smps(there Is no switching IC.only 2 transistors)..i found a shorted zener diod e in secondary side i removed It and without replacing It..i plug the Power..then One transistor in primary side exploded!!! What am i wrong??!

[@BricoolinoSenyor]

عيد مبارك
تقبل الله صيامكم وقيامكم وصالح أعمالكم 🤲

[@HaseebElectronics]

كل عام و أنتم بخير بالصحة و السلامة
الله يقبل منا و منكم
تقبل الله طاعتكم و جميع الصالح الاعمال
عيد مبارك يا اخي الكريم

[@Nomanfamilyvlog]

ماشاءاللّٰه‎ وعلیکم السلام

[@HaseebElectronics]

Jazaak Allah khair
Eid Mubarak to you and your family

[@godstimechason8984]

Pls sir I need your help
I have a power pack which the AC volts is 230,while the output is 12v DC, but the DC is low to 4dc, what could be the issue?

[@prashantsuryawanshi2139]

Sir mere pass Jo smps hai vo 24 volt ka hai Jo 28 volt Tak regulate hota hai lekin proper job nahi nikal Raha flex printer ka SMPS hai voltage brabr hai kya current kam pohch rha hai...Aisa ho skta hai kya

[@davidkumar3382]

Hi sir, I have one smps, it has output voltage dc24v/20A and 27v/2A. Output is coming correct, while giving the load the smps getting vibration sound. So what is the problem in that sir

[@CorneredCat0]

السلام عليكم ورحمة الله وبركاته،
I am struggling here with the Sony DZ350 secondary portion not providing any power, can you help me out?

[@rossmoodley9407]

What is the rule when you have to use a different value capacitor for test purposes. eg i don't have on hand 1000uf what can i use for test purpose tks

[@muruganuoorkavalan9687]

Can you please share IGBT INVERTER PULSING CIRCUIT REPAIR
FREQUENT BURN OF DIODE

[@muhsen61]

Assamu aalekoum . A question. Why som of power supply 12 volt 2 amps has the tl 431 with 1 resistor in the gate going to the positive . Without resistor to negative i try to change the voltage it cannot go more than 15 volts but . There is no zener diode. Shukran شكرأ

[@HaseebElectronics]

وعليكم السلام ورحمة الله وبركاته
تقبل الله منا و منكم الصيام و القيام و صالح الاعمال
عيدكم مبارك
كل عام و أنتم بخير
you must locate the Pin 1 of TL431 there must a voltage divider network (2 resistors in series connected between +ve out and ground. center node will connected to pin of TL431
or there may be zener diode connected between pin 1 and ground

[@UdayKumar-xl5gp]

Dear Sir , Your soldering station is very nice from where we can get pls share the model no also

[@HaseebElectronics]

it is Weller WR3M made in germany
bit.ly/37oZfxm

[@UdayKumar-xl5gp]

Thankyou for the Reply

[@faizalkattoo7283]

Sir ji plase make vedeo high maslight repairing i dont know proper name of that light her we tell highmax light 🙏🏻🙏🏻🙏🏻

[@1977hmon]

sir. what ic no. can i substitute with 34063al? please..

[@HaseebElectronics]

use LT3470 .
CS51031/CS51033 is more comparable to the MC34063 but it requires an external power transistor.

[@bantidasAB9475]

respected sir if it will be convenient for you so make video on buck converter using ic 3843 and and make the buck converter in video and explain about it as well that because there are no... Of youtubers who made video about buck converter and boost converter but they don't explain. Only you who make and explain about anything so it's my dribs and drabs to make video and make buck converter or boost converter and explain please

[@HaseebElectronics]

Yes Brother
i noted your last comment and i will do it surely.
it will take some time and i will do it

[@HaseebElectronics]

your TEA1617 ic also on waiting (which you asked in video number 559)

[@bantidasAB9475]

@@HaseebElectronics great sir

[@bantidasAB9475]

Sir but try to make video on buck converter and boost converters with talking about efficiency of them because there are large amount of beginners in this field who wants to understand this so try to make as soon as possible

[@HaseebElectronics]

sure I will try my best

[@sanjaygurung7692]

सर Dsoldering iron कहाँ मिलता है 🙏🙏

[@HaseebElectronics]

you can check online suppliers
it is available indiamart
bit.ly/37e3HPf

[@boybravo689]

Sir the voltage at main filter is present and no voltage at the secondary output what happen to the voltage at the input pin of the optocoupler sir tnx

[@HaseebElectronics]

check startup resistor and vcc voltage
check switching frequency of the PWM IC, if it is not switching then may be you need to replace IC
i will suggest to check video number 528, that covers almost all common faults .

[@vishakhasabe7481]

Sir soldering iron kha milta hai please send me address

[@johnlee3511]

Sir, I have a some question. SMPS connecting negative output to earth/ground. Why?

[@ABCD-hf2ju]

Blue capacitor (connected between hot and coldsite ground) is short . Remove it

[@mr.m2952]

Assalam O Alaikum Sir here my vcc capacitor is fluctuating why ....? Help me

[@HaseebElectronics]

might be its output side have something wrong. any component have short circuit.
check vcc capacitor

[@dilkhushtechno2045]

Sir namste 🙏🙏🙏🙏🙏 sir ek request h aap se ek telegram chainal create kijiye. Please sir jis se ham log aap se dairect jur sake please sir.

[@HaseebElectronics]

telegram account 00962-79-1161084 id per bana hua he bhai

[@garn6223]

Thank you very much sir 🙏🙏🙏

[@HaseebElectronics]

Most welcome

[@prangki]

Happy Eid-ul-Fitr 2022
i hope your life is as spicy as biryani and sweet as kheer. Savour the joys of Eid...🙏🙏🙏🙏🙏

[@HaseebElectronics]

جزاک اللہ خیرا
Eid Mubarak to you and your family
my best wishes on Happiest day of Eid Ul Fitr

[@boybravo689]

Wathing sir on replay mode

[@user-zz3oh5uk1c]

Teach

[@dilkhushtechno2045]

Sir aasha karte hain ki aap meri baato ko ignore Nahin Karenge

[@HaseebElectronics]

most welcome brother

[@dilkhushtechno2045]

Thanks a lot of you sir

[@allaal8139]

السلام عليكم وعيدكم مبارك
Pls Ihave problem
I need to change my smps 220 Ac input 24vDc 500w
To 110v Dc input from battery
The question is what i do to change the input from 220ac to 110 DC
Note, I can pay you if you help me
Thanks 🙏 from 🇮🇶

[@AliRaza-md1lt]

Makes a video in Urdu

[@andrewmagri685]

LG stove oven not heating up main board EBR52349502 HOW TO TESTED
Thank you

[@msbbadsha1456]

Nice video

[@HaseebElectronics]

special thanks