The best way to learn from this video is to get just pen, print out data sheet and take all notes and go along, pause rewind until you get it on the paper, take all notes, pause rewind again! And conforme that you know what every resistor or diode does in circuit and then you move to live PCB! When i start electronics i didn't quite understand what is "start up circuit for IC" and that cause me a lot of trouble. But Haseeb makes this grate videos explaining every step, so consider yourself lucky to have this kind of knowledge just served out! Thanks Haseeb.

@HaseebElectronics

Жыл бұрын

best regards and special thanks for your valuable comment

@transparentlab8318

7 ай бұрын

1741G,is it opamp?

@transparentlab8318

7 ай бұрын

​@@HaseebElectronics1741G ic, is it op amp

You are the Guru when it comes to SMPS repair. I don’t think anyone comes close to your knowledge on YT

@HaseebElectronics

Жыл бұрын

no brother i am still learning thanks a lot for your valuable comment

Great video! So there's now NO need to ask you 10 times how to fix my tv! You've covered this subject better than anybody. If I can't figure SMPS's by now, I probably shouldn't be taking anything apart. Thank you for taking the time to take what once was a completely foreign circuit to me and making it understandable! Best regards!

@HaseebElectronics

Жыл бұрын

it is my pleasure. i am thankful for your valuable words please accept my best regards

@W1RMD

Жыл бұрын

@@HaseebElectronics I've been recovering from an eye injury. I had to take a little break in watching videos, but I'm on the mend. I'm greatfull for God's healing. I appreciate your kind words!

@HaseebElectronics

Жыл бұрын

you will recover soon take special care for yourself and stay away from blue screens specially mobile screen is a biggest enemy for our eyes wish you happy l, healthy life 💖 and fastest recovery

@W1RMD

Жыл бұрын

@@HaseebElectronics Thank you! I am recovering at a fast rate. I was grinding metal under my truck and the goggles weren't tight against my face. Aluminum oxide cutting wheels can be VERY dangerous! I got a full face shield I will wear in addition to goggles. Thanks for your prayers!

Haseeb you are the best i have come across in circuitry explanation Keep up your excellent work

Wa aleikum salam varhmathulla...jazzk allaha kairan...good explanation bro

@HaseebElectronics

Жыл бұрын

best regards and special thanks

No university teach like this man .thanks

May Allah almighty bless you and and give you all the best in dunya as well as in ahirah for your helping people to understand these complex concepts of electronics, esselamu alaikum wa rahmetullahi wa berekatuhu.

Best video on smps troubleshooting i've ever seen

@HaseebElectronics

Жыл бұрын

best regards

Very interesting 👍 and your English are very good

@HaseebElectronics

8 ай бұрын

best regards

Perfect explanation. I have learned so much with you. thanks so much.

စိတ်ဝင်စားဖို့ကောင်ပါတယ် 👍👍👍

Masha Allah great video to learn may Allah protect you!

شكرا-- والف الف شكر لك --- وجازاك الله بالخير---دمت طيبا ومعطاء -بارك الله بك

We are also following yous foot steps. Many many thanks for your motivation information.

@HaseebElectronics

Жыл бұрын

So nice of you. it is my pleasure. i try to share the easiest ways to troubleshoot the circuits, might be it may useful for someone

Very good and very informative Thank you very much for sharing Best regards from Philippines 🇵🇭

@HaseebElectronics

Жыл бұрын

best regards and special thanks dear brother

Very good explanation in depth of each components and complete operation. How we get output and why we do not get output if any problem in parts! Thank you for giving scientific level of knowledge.🙏🙏 Loves from IND.

Thank you sir for an excellent video. Every time I watch your lessons I learn something new.

@HaseebElectronics

Жыл бұрын

You are very welcome

I will never leave this channel , thx

Thank you sir for your video lessons on SMPS your video series taught me everything I know about SMPS. Jazhakhum llah khairan.

@HaseebElectronics

Жыл бұрын

it is my pleasure

Excellent Weldon keep sharing

@HaseebElectronics

Жыл бұрын

best regards

Emeğine sağlık kardeşim.Hayırlı günler dilerim.

@HaseebElectronics

Жыл бұрын

best regards and special thanks

A wonderful Video, excellent explanation! Thanks a lot

@HaseebElectronics

Жыл бұрын

it is my pleasure

Thank u so much. Your all vedeos are informative and knowledgeable. Thank you so much.

@HaseebElectronics

Жыл бұрын

You are most welcome

Very good and very useful in-depth explanation - thank you.

@HaseebElectronics

Жыл бұрын

You are welcome!

One quick observation, which you should probably advise in this video: ALWAYS use an isolation transformer when you're using an oscilloscope for troubleshooting the PRIMARY of any SMPS!!! In fact, I guess you are already using one (not shown in this video), or maybe your oscilloscope is not "grounded", otherwise we should have seen some big sparks when you are connecting the GND of the oscilloscope to the negative HV on the PSU primary. 😲

@kaveag

10 ай бұрын

All correct, I had exactly the same question... He has to have some galvanic isolation, otherwise, it's a guaranteed short.

That was a very good video for quick troubleshooting ideas.

@HaseebElectronics

Жыл бұрын

it is my pleasure

As-Salamu Alaikum Sir. Really great explanation. I watched every moment of the presentation and listened to it over and over. Thanks to the information which you shared, I believe that I have the knowledge to easily repair and redesign an SMPS. Thank you very much for sharing your valuable knowledge with us. May Allah be with you...

@HaseebElectronics

Жыл бұрын

You are most welcome

terima kasih banyak, saya banyak belajar dari anda, assalamu alaikum

@HaseebElectronics

Жыл бұрын

it is my pleasure

Excellent video dear friend, have a happy Thursday ☺️

@HaseebElectronics

Жыл бұрын

many many thanks have a happy weekend

Very good video.Thank u Mr Hasssan

@HaseebElectronics

Жыл бұрын

You are most welcome

you are a great master😊🙏🙏🌹👍i am proud. of u

@HaseebElectronics

Жыл бұрын

Many many thanks

Your explanation is good i improve myself in your guidelines thanks

@HaseebElectronics

Жыл бұрын

it is my pleasure

السلام عليكم ورحمة الله وبركاته واضح جدا بان حضرتك تمتلك خبرة عالية في الالكترونيات وانا اضع اعجابي بهذا الفديو المفيد جدا حدثت لي حالة لشاحن لابتوب ASUS وهي بمجرد ان اربط الشاحن على اللابتوب يشحن اللابتوب ل3 ثوان ثم تتوقف عملية الشحن استبدلت الشاحن باخر مستعمل غمل الشحن وعمل اللابتوب جيدا اكون شاكرا للمساعدة دمت بخير

Hmaisha ki trha shandaar

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Very good and very nice explained thanks for sharing this knowledge to us

@HaseebElectronics

Жыл бұрын

it is my pleasure

Wonderful channel , very informative , Well Done Bro.

@HaseebElectronics

Жыл бұрын

most welcome dear

Can you briefly explain the differences between those ICs that are in the thumbnail (3844,3845..) and UC3846? Thank you, I really appreciate your informative videos. Cheers from Croatia.

Thank you so much to share your knowledge.

@HaseebElectronics

Жыл бұрын

it is my pleasure

Excelente dominio del tema

Thank you very much sir. Appreciate.

@HaseebElectronics

Жыл бұрын

it is my pleasure

Good evening guruji i love you sar

@HaseebElectronics

Жыл бұрын

thanks a lot bhai

Good job.really clear explanation.can you pls make a video on troubleshooting 3s bms circuit.

Walikum Salaam Jee Have Aa Blessed Day

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Thanks a lot sir for another informative video I am Ihsanwazir from north waziristan .I have requested u to make a video on account dc fan circuit but u did not made. now I am requesting to make a video on how to remove battery full command from ghotky battery charger plz make a video or reply about.Thanks

@ihsanwazir4611

Жыл бұрын

sir we do not have internet connection all the time but when we visit the city we got online from PTCL network so plz plz and plz reply.

Very nice & informative video

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Woooow more then wonderful thank you

@HaseebElectronics

Жыл бұрын

IT IS MY PLEASURE

Thank's for the block spike voltage circuit diagram.

Nice and very clear and educative video ! Not need to use a isolating transformer for use the oscilloscope to diagnose a SMPS?

Thank You very much Sir 🙏

@HaseebElectronics

Жыл бұрын

best regards

wow very well explained

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Good informative video

@HaseebElectronics

Жыл бұрын

best regards

I have another safetytip for you. Many SMPS chips like the one you have in this video, can work at much lower voltages than the 220V/110V line voltage. Often - but not always unfortunately - 35V is already enough. You can find the necessary minimum input voltage in the datasheet for your chip. So buy yoursef a basic AC/AC transformer that can output 25V AC (or more) or an AC/DC adapter that can produce 35V DC (or more). Use that output as input for the SMPS under test. It can save you a lot of premature gray hairs.

Keep up the good work

@HaseebElectronics

Жыл бұрын

best regards

Sir Aoa.great learning video.I requested before for fault asolation of ac DC cieling fan circuit.plz emphasize

love you sir nice video

@HaseebElectronics

Жыл бұрын

best regards and special thanks

thank you in kurdistan

@HaseebElectronics

Жыл бұрын

Best regards 💝

Great job

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Good job

Most excellant tutorial !

Excellent video sir please make video on led tv driver voltage and current control by changing resistance and make compatible to our need.secondly which multimeter is suitable for 75 to 100 mhz measuring frequency. Thanks

Good work

@HaseebElectronics

Жыл бұрын

Thank you so much 😀

More information for expert person

@HaseebElectronics

Жыл бұрын

best regards

Big fan of all your PS vids and O scope vids. What would cause a PS to have 168v stable on main cap (should be 320ish) and no voltages on the full bridge rectifier? 🤔NTC is good. What did I miss? Board is for a ccfl TV.

Thanks for a great understanding for working of pwm ic can you plz make a video for pwm ic with getting vcc voltage fluctuating and not able to turn on the driver mosfet..... thanks in advance

Excellent

@HaseebElectronics

Жыл бұрын

Thank you so much 😀

Thank you Sir😘

@HaseebElectronics

Жыл бұрын

Most welcome

Nice video sir

@HaseebElectronics

Жыл бұрын

best regards

Sir plz chopper transformer k bary main video bnao k wo kesy kam krta hy jo china tv main 17inch screen k sath lgta hy... Horizontal yoke ka load km krny . Is k alava hm kesy yoke load km kr sakty hain

Thank you sir

@HaseebElectronics

Жыл бұрын

it is my pleasure

PWM815YBN equivalent ic kaun sa lagega yah ic welding machine ke power supply mein istemal kiya

I know that I post this on all your videos, but you are a legend. Just wondering have you ever read the Switch Mode Power Supply Repair book that was released by Jestine Yong. Or what are your opinions on it?

Amazing

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Good morning sir

@HaseebElectronics

Жыл бұрын

good morning dear brother 💕

Good morning sir please please do you have any vidéo on carbon fiber heater. Especially the one with temperature control circuit. Thank you so much for your work

Teşekkürler...

Salaam bhai

As-salamu alaykum dear haseeb sir can you make some video series about EV chargers for 2 wheeler and 4 wheeler if possible. InshAllah.

perfect :)

@HaseebElectronics

4 ай бұрын

best regards

👌👌👌👍

@HaseebElectronics

Жыл бұрын

best regards

👍

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Hi sir, thanks for the video .since last time I was asking U to , how to find PWM ic part numbers, it is in SMD sot23-6L pakage. I did Google also using the print letters on components but still not get and perfect datasheet ... Nandri Vanakkam 🙏

@HaseebElectronics

Жыл бұрын

welcome dear. you didn't mentioned the SMD code. if you can share it, i can also try

Confusing, the resistance of the NTC increases when heat is applied ? This is actually the characteristic of PTC !

@HaseebElectronics

8 ай бұрын

In Negative temperature coefficient ntc resistance When temperature increases the resistance decreases As it responds in reverse

Thank you sir for this informative video.. sir i am new in repair. I am working on atx smps(Lps450) with Utc7608d (str-a6151) and Hs8108 ic. Not getting standby vtg. 330v available at stb xmer primary coil1, on drain and source of utc7608. No vtg on secondary side. Checked all components on standby rail. Help me sir

Wow

Hallo sir,if possible please explain in eny video how -voltage generates like as -5 or -12 volt DC which is used in optical transmitter of catv

What could be young👍👍👍

Hello, to share my experience with an 12v/220v inverter, the cold testing is good, when power is applied, it is short circuit. Drive signal at sg3525 is good, any idea where to look at ? thanks

👍 ✋

@HaseebElectronics

Жыл бұрын

best regards and special thanks

Is that ptc ? When u apply heat it increase resistance..

Thank you. Please enable subtitle.

@HaseebElectronics

Жыл бұрын

best regards subtitles will available tomorrow morning

Hello sir I have a question what pwm ic can I use to design buck converter that the current can be adjusted without turning the voltage down,I can’t find a ic that I can latch comparator to control the current output

Hasib sir please let me know what happens when smps transformer got shorted . I'm very curious about that sir

@HaseebElectronics

Жыл бұрын

if transformer short circuited of it is partially shorted, it will damage the mosfet

Assalaam alaykum. Can u eplain how does home theatre amplifier work please

Any chance you could do a video on a dual output power supply for both 12v & 24v, how they work? Currently troubleshooting one that has 24v but missing 12v, only has 1.2v, can't figure it out. Checked caps & regulator.

@HaseebElectronics

Жыл бұрын

it seems that the 12 volt section have short circuit check its rectifier and capacitors i hope you will detect the issue

@electronicrepairservice2020

Жыл бұрын

@@HaseebElectronics thank you. The first thing I did was to look at board under a thermal cam - no shorts detected. Then checked all 3 pin components & electro cap values. I came up empty. 😧 No schematics, this is turning into a rabbit hole.... but I will persevere. 🤯 I have a good board to compare it to luckily.

Hello friend can you explain how to work TOP255PN?

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

Thanks for your great tutorial. But is it possible t o use a thermal camera to find short in SMPS too? Both in Hot and Cold part of SMPS? Thank you for your reply

@HaseebElectronics

Жыл бұрын

best regards yes thermal camera is also a very useful tool but it is expensive. but it is a great tool ad well

@ladbla1752

Жыл бұрын

@@HaseebElectronics Thank you for your reply. What is an advantage( if any ) of light bulb you use in repairs? I use an isolation transformer and not sure if it is still needed/good for me (to start using the light bulb too) during repairs

@HaseebElectronics

Жыл бұрын

the series lamp is much better, when we are repairing some circuit card. it covers most of the time the mistakes while repairing. some component failure in the repair process. it will not allow to make more damages in the circuit. using isolation transformer, it is an excellent practice and it is much safe but use of series lamp saves the circuit from more destruction

@ladbla1752

Жыл бұрын

@@HaseebElectronics Thank you for reply. And is it possible to use bulb lamp (to cover most mistakes as you explaned ) and an isolation transformer ( for safety) together ?

@HaseebElectronics

Жыл бұрын

please check video number 683 for more detailed answer

Hello, What fault could cause that the voltage at the capacitor that feed the pin 7 in the ic 3843 doesn't get higher than 8.47 volts

Dear sir, request for Hindi video.

@HaseebElectronics

4 ай бұрын

Already uploaded on my Urdu channel Haseeb Electronics Urdu

IN NTC THERMISTOR , REISTANCE DECREASES WITH INCREASE IN TEMPERATURE . THERMISTOR USED IS PTC THERMISTOR IN CIRCUIT SHOWN IN UTUBE