{522} How to Test SMPS IC Switching/ SMPS Switch Mode Power Supply IC Switching Test with Multimeter
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- Опубліковано 22 сер 2024
- in this video {522} How to Test SMPS IC Switching/ SMPS Switch Mode Power Supply IC Switching Test with Multimeter.
DOWNLOAD UC3843 SMPS Power Supply circuit Diagram / Schematic bit.ly/3jpm06C
during repairing a switch mode power supply, how we can verify that the smps controller / pwm controller is switching, we can test the switching of the pwm IC using digital multimeter.
smps #electronics
in this laptop charger repairing / troubleshooting i demonstrated the test process to verify the pwm ic switching. when pwm controller IC starts switching it drives the mosfet and provides switching pulse to drive transformer primary winding
we can test dc voltage across mosfet drain to source
we can verify voltage from vcc winding rectifier
we can check voltage from optocoupler
in last video number 521 • {521} How to Repair La... i demonstrated Laptop Charger repairing (DEAD) No Power Solution | How to Repair Switch Mode Power Supply SMPS, this laptop Dell laptop charger using UC3842 current mode smps controller ic, it had no power, when power was connected or plugged in, it was not powering ON.
when i checked the voltage on DC rail on bulk dc capacitor, these were 330VDC but there was no output. then i checked voltage on vcc capacitor there were no voltage. vcc voltage are the most important for function of any ic. so that was the reason that pwm controller ic us3842 was not taking start. (uc3842, uc3843, uc3844, us3845, ka3842,ka3843, ka3844, ka3845 ics have the same pinout in their datasheet). pin number 7 is vcc pin, it must have vcc voltage for 3842 ic, it must have 12 working vcc voltage. these vcc voltage were missing due to the reason that the startup resistor was burnt. it was not providing initial vdd or vcc voltage to the ic. i checked that the original resistor was 180K ohm. for test purpose i connected 310K Ohm. (we can use a higher value resistor, it will cause a slower start)
explained practical How to repair switch mode power supply SMPS very easy. 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:-
how to repair smps
fuse keeps blowing
how to repair switch mode power supply when short circuit at input
if SMPS is dead or no output
if SMPS have fluctuating output or output voltage unregulated
if smps have short circuit in output
how to eliminate short circuit
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
How to Test SMPS IC Switching
SMPS IC Switching Test with Multimeter
SMPS Switch Mode Power Supply IC Switching Test with Multimeter,
laptop charger repairing
laptop charger no power
How to Repair Switch Mode Power Supply
How to Repair SMPS
uc3842 ic circuit diagram
Uc3842an,
haseeb electronics,
how to repair laptop adapter
how to repair laptop charger
how to repair laptop adapter
no power solution
smps ic testing
pwm ic tester
pwm ic testing
![АЛАУДИНОВ у Скабеевой: эти их ВСУ нас НЕ ДОГОНЯТ 😁 [Пародия]](http://i.ytimg.com/vi/an0anqU4WGQ/mqdefault.jpg)
Hi sir, you made my day. wonderful explanation and i repaired an SMPS, the switching IC number scraped by the SMPS producer, their intention was not to repair it., so that i could not find the IC number and there is no IC switching , and found that the IC fault not switching and found IC number by your diagrammatic explanation. thanks a lot. almighty may bless you.
I wanna thank you speaking in English for this informative video which is hard to come by these days that alone sir has earned you a like and subscribe button.
best regards
my video are also available in urdu language for my pakistani brother on my urdu channel at (haseeb electronics urdu)
my all these videos are shared in urdu language for pakistani and indian viewers
Nice explaination with detail now I easily find out IC switching.shukria jazakAllah.
Asslamualekum Haseeb, l did my electronics in mid 70,s when smp,s were just introduced, all the theory and no practice. I enjoy your programmes and have come back into electronics as a hobbyist and thoroughly enjoy your programmes, thank you for sharing, and please keep the good work up, this is truly sadqai jaareah.
wa alaikum slaam sir
it is my pleasure that you liked my efforts
Allah bless you sir
stay blessed
Sar Maine ab tak bahut youtubers dekhe Hain but aapki tarah youtubers nahin dekha kyunki samjha ke batane wala yah bahut kam aadami mein hota hai great hai sir aap great hai main ummid Karta Hun STR madule ke bare mein kuchh discuss kare
Mr. Haseeb, all of your videos are excellent. I really like how you take the time to cover all bases of the component you're testing. I have learned so much from your teaching style and I would encourage you not to change anything the way you explain things. Is possible in the near future you can do a video on to read a circuit board, so I can better understand what and how to test components on a circuit board!
Thanks
Bennie G
You are most welcome
great suggestion. i will discuss it in detail in near future
Hi .Mr Haseeb can you do a video on repairing a 1.5kw servo drive,,,voltages test and also a stepper drive,,,pliz explain how to test their igbts it will be informative and educative no one in UA-cam has done it well like you do ..we love your work
I will greatful your work is perfect
Every video you make is a great video and I learned a lot from you.
Thanks.
it is blessings of Allah
Very good video! Greatings from Bulgaria!
Wa aleikum salam varhmathulla ......good explanation jazzakallaha kairan
best regards and special thanks
Engr. Haseeb good afternoon from here am a subscriber of your channel, your videos on SMPS power supply had been of great information and I was able to fix my Laptop and phone chargers thanks amilliin.
it is informative, keep your lecture through schematic diagram and practical
Sure
It is my pleasure
Very good video, this information will help you identify the problem in your circuit
It is my pleasure
Buenas noches , que videos también Buenos y bien explicados , apesar de la barrera del idioma las explicaciones se entienden perfecta mente los felicito , sigan asi
i will share ur videos to my friends too
Best regards
I raised a question in one of his video but I slowly inching towards to find it on my own. Thanks
All this creativity and all this tremendous amount of perseverance and achievement with the content of your channel, and yet they have not given you the UA-cam shield yet..!?
You are very wronged, my dear friend Muhammad Ashraf..
Continue, may God bless you, and God willing, you will receive the fruits of your good deeds before God and the people, and your efforts will never be wasted.
Whoever works hard finds...and whoever sows will reap.
A big greeting to you from Baghdad, Iraq.
i am thankful for your beautiful comment and love
yes brother, i received a shield from UA-cam in last December. that is just a metallic piece.
my actually shield is the comment and feedback of my viewers
Excellent thanks for sharing this informative video keep sharing
Sir G aapke har eak videos perfect knowledgeable rahate hai , aisehi videos banate rahiye hamareliye 🙏 1 request hai aap se ki smps me hot section k parts nahi mil rahe to module lagake kaise Kam chala sakte hai ? Aur uskeliye primary k kun se parts aur kyu nikalna jaruri hai wo points samza dijiye please 🙏
primary section ke parts available nahi hote to external smps lagake kaise Kam chala sakte hai 🙏🙏🙏
59 lk dear💕💕💕💕 beautiful share Bhai
Thank you so much
amazing video.excellent analysis.thenks
best regards and lovely thanks
Smps Supply power Good tutorial technical work sharing
حفظك آلله و رعاك اخ حسيب
الله يسلمك و يسعدك يا اخي
Great Sharing 🌹🌹🌺👌
Thanks for visiting
Superb explain.. love from srilanka.. 🙏
Thankue dear for providing smps diagram with detailed description, Jzak ALLAH.
You are welcome
each an every video u make even if u just say salam aleikum its always a like from me ..respet to you sir
ماشاءاللہ ماشاءاللہ بہت خوب جناب
thanks a lot bhai Ji
Thanks for great explanation 🌹🌹🌹🌹
best regards and special thanks
Good repair ideas.
Beautiful knowledge sharing.
special thanks
Spirit is always a friend
Nice one buddy! Really wicked video! Big like
best regards and special thanks
جزاک اللہ خیراً کثیرا۔ 28-1-23
VERY NICE EXPLAIN......... SUPER SIR JI .......THANKS ......
thanks a lot dear
Thanks for a detailed explaination very informative video💯💯
Jazaak Allah khair
Walekum salam respected sir how are you always deeply information
Many many thanks dear sister
most valuable information, Sir. Please, single phase preventer (auto switch) ka circuit detail me explain karenge to bahut meherbani hogi. Sir🙏🙏 with transformer and without transformer ka circuit ke sath hua to bahut khub rahega 🙏🙏
Hi sir good evening 🙏
This is very informative video and a great explanation.
So many thanks for sharing 👍
Most welcome
thank you very much sir... very informative video.
Thanks for beautiful description. One of my question is can we give 12 v DC from outside to ic vcc pin without connecting to ac 220 v for checking ic. If ic is working it will give reference voltage and out put of gate otherwise not.
Yes you can
please check video number 449, in that i demonstrated using TL494
very soon i will make SG3525 circuit
Magnificently explained sir , 👏, kindly share link of smps transformer data calculation of round core 🙏, extremely thankful sir..
Great detail discussion. Thanks
Very welcome
Great video thank you, I didn't know for this check mosfet between drain and source, but how to know is IC swiching if mosfet is integrated into IC
Salam alykum sir thanks very informative video
thanks a lot
Amazing video dear friend!
Thank sir for detailed explanation👏👏👏
it is my pleasure
Lk walaikum asslaam 👌good vido dost stay connected 👈😊
thanks a lot
🌹🌹🌹🌹🌹MashaAllah MashaAllah Allah ap ko zindagi da 🌹🌹🌹🌹🌹🌹
thanks a lot dear sister
Good reasoning thank you
best regards 💗
Salam beautiful sharing
Good content 👌 amazing skills
New friend from uk 🇬🇧
Stay connected ❤
You have a great experience and superb knowledge which both are free of charge here
best regards and lovely thanks dear brother
Realy Haseeb bhai in this world where every person see thier interest Even in a small efforts he does, you are doing a great charity for those who are realy wants to learn things but unable to do any course.
You are a gentelman
special thanks for your valuable comment ❣️
Thank you dear. Very good information. Happy New Year.
best regards and special thanks
Happy new year
MashaAllah 4 k sbs keep going
special thanks dear sister
Amazing big like
best regards
Beautiful job 👌 give you big 👍 my friend
Thank you so much 😀
Good information sir.. Sir my FnD speaker smps is voltage flactuate and primary section zener diode showing full shot but when i open diode was good condition
big thumbs up 👍
masha Allah sach a great explanation thanks for sharing 🇬🇧
Jazaak Allah khair
Would like to see video showing how to Safely probe the smps with a scope.
Thanks Bhai maine aapki smps ki bahut sari video dekhi hain aur bahut kuch seekha aapse, ek question hai please answer karna
Ek smps mein ek reference voltage toh octocupler ke pas jo transistor hota hai use di jaati hai jisse octocupler work karta hai lekin ic mein jo reference voltage hoti hai wo kya kaam karti hai.
i noted it and i will explain it
Hi friend thanks for another informative video, the more I watch this type of videos the more I learn thank you. What is the model number of your multimeter
best regards and special thanks
i have Aneng Q1, Fluke 179, Fluke 15B
Uni-T 202A
@@HaseebElectronics thank you
Good points sir. Zabardast
best regards and special thanks
Sir It's a great video
When smps is working, Difference of voltage on main /bulk capacitor and in mosfet drain and source is it same? (approx 25volts in this video) for all smps circuits?
it depends on the rcd snubber's efficiency. this difference may be 5V to double value of the capacitor's voltage
i mean if DC capacitor 300VDC, then the mosfet drain to source may be 305 to 600VDC
Excellent 👌👌👌😊
thanks a lot
Thanks for the wonderful video, very exhaustive. I have a question: there is a rule, a formula, between main capacitor voltage and D-S modfet voltage? Thank you
best regards and special thanks
yes there are may calculations for dc capacitor. witching at different duty cycles, and in result the voltage applied to primary and in off period the stress
in this video i compared the voltage stress in dc voltage range
we can check it with dc range much safely than the ac range
@@HaseebElectronics Thanks a lot!
If possible please teach the formula of main filters capacitor value used in SMPS Circuit, waiting for your great explanations, thanks a lot 🙏
Very informative! Thanks for sharing!
best regards and special thanks
Very well explained where are u from iam prasanth from kerala india
Good Morning & Good Luck My Brother Good Work Liked It # 271
thanks a lot bhai
Thank you, Professor Haseeb. Great video. I have a question. What is the reason or the defect in hearing the sound of tick tick tick in the transformer? Although all the parts in the high-voltage phase are intact. thank you
best regards and lovely thanks
1. if any winding have bad soldering joint with mounting pins of bobbin (remove the transformer and re-solder the winding ends with the bobbin pins)
2. if switching frequency jumps (check the frequency )
3. sometime the ferrite core bonding becomes loos and produces the gap between outer leg.(in this case disassemble transformer and apply glue to the legs & sims if it is gaped core)
4. if winding becomes loos (pour varnish)
5. in some situations it may be unexpected sudden spikes from load (in case of capacitor internal sparking)
@@HaseebElectronics i have the same problem too, will check that and reply. Many thanks.
Nice sharing
best regards
Superb brother
best regards
Excellent sir…
very good thanks
Most welcome
Thanks lot of sir.very good. Your videos.l have Philips tv after one minute tv off again try to on but not on.why like this happening?
Asslamualikum haseeb Bhai 👍
wa alaikum salaam
aap beaf pulao wali video per merey comments deh lena. q k mein choti videos nahi dekhta hoon
saarey channels se aap ki full support rahey gi
In such Flay Power Supplies, there are 3 simple malfunctions (& the fuse is WORKING! )
-the failure of the starting resistor along the 7pin 384x circuit
and the loss of capacitance or the larger ESR of the capacitor on this 7pin (C5 C8 to your circuits),
well,or a leak breakdown in the zener D2 and the self-supply diode D1 after they are checked / replaced, everything will work.
IF THIS DID NOT HELP, then all HOT PART or maybe a transformer for replacement -
repairs can be UNPROFITABLE and more expensive than buying a new product.! But the owner ALWAYS decides to repair or buy a new one
Awesome thanks
best regards
Very good informative video sir, All aspects clearly mentioned.Thanks for sharing
Thanks and welcome
Magnificently explained sir
Thanks and welcome
Thank you! Excellent. One small request... Please do not place the link pop-ups on the screen, until after you are completely finished showing us the details. The pop-ups cover whatever you are displaying and we a hungry for every bit of information... Please and thank you!
welcome and special thanks
thanks for great suggestion
sure i will not add links on screen - noted it
@@HaseebElectronics Oh, thank you! Just to be clear, the links are helpful to finding more of your videos. You just need to add a little blank space to the end of the video, after you have finished teaching, and place the links there. I rather imagine that you already understood that to be what is needed. You are always so gracious to reply, but I understand that there are a great many demands upon you and your time, so there is no need to reply.
Great explanation.
best regards and special thanks
Ty. Great explanation.
You're welcome!
MashAllah very good explanation
Thanks and welcome
Mashallah good information video
Many many thanks
Great explanation bro👍👍❤️❤️❤️
best regards and special thanks
Good information thanks sir 💐💐
thanks a lot
best regards
وعليكم السلام ورحمة الله وبركاته
You speak Arabic well
actually I am from Pakistan and now in Jordan. I can speak street Arabic language very clearly but technical English is different and a global Arabic Arabic technical meaning may differ
I am arranging someone to translate these videos. if I am successful then it will my pleasure to serve my Arabic brothers
السلام عليكم ورحمة الله و بركاته
There is a big long diode in the circuit..how is it measured in a circuit to know whether bad or good diode..I tried and all ends were measuring and giving figures not like rectifier diodes..thanks for the answer in advance
Good information Sir i like video 👌👌👌
best regards and special thanks
Ustad zindabad
thanks a lot
Nice INFORMATION
Very very interesting ! i'm à new subscriber from France. Can you tell me please...i don't understand, on Mosfet Q1, what is the role of C9+R9+D3 ???? Best regards.
best regards
please check video number 510 ua-cam.com/video/SJFs0iLKzyI/v-deo.html
& 284 ua-cam.com/video/t1GWU63lxm8/v-deo.html
@@HaseebElectronics Thank you my dear friend ! now it's very clear on my mind.
Very good and useful information sir thanks for sharing this knowledge to us
stay blessed
Very nice video 👍👍👍👍🌹
Thank you very much!
Great job bro👍👍👍👍👍👍👍
Thank you so much 😀
Maa good work 👍
It means sir 88v across snabber diode + 116 volt across snabber resistor = 204 v dc. Left voltage storage in bulk capacitor to applied ac voltage.
Very nice video sir
Thanks and welcome
MashAllah so much informative video thanks for sharing 👍 Sir
best regards and lovely thanks
Great video (Tekrar seyret ve tam anla)
Hi Haseeb, another great video. I never saw anybody check the DC voltage across the pins of the MOSFET before. That's a high frequency AC signal with the MOSFET turning on and off at high frequency - is that safe to measure that voltage with a cheap multimeter (like the one that I have 🙂) ?
wow
thanks a lot for your valuable words
at very high frequency switching mosfet / igbt / transistor is considered as a dc source (similar to a dc generator)
it is completely safe to test source to drain at dc range
but it is much dangerous to test the same at ac range (specially when we have a low brand, low quality meter which dosen't have a good frequency response at high frequency, it may damage mosfet or smps controller ic)
but a cheap multimeter can safely measure this signal at dc range