Excellent video Sorin! We need more from switching power supply repairing.

@bighairynuts4u

4 жыл бұрын

Agreed

Welcome to your workshop, teacher, very good class and we miss you so much. Greetings from South America, Argentina

I had this exact same problem on three monitors, Just fixed two monitors after watching this video. Thank you so much!

@rayofcreation3996

4 жыл бұрын

STYLO great job. Good luck to you. 👍😊

Well done ! You have given a proper way to diagnose and examine the power supplier, In this case of Voltage instability at the output. Thank you

You make the best repair video's. It's almost like a meditation. Sipping some smoke an calm down to get deeper in touch with the fault. Then you Find it and Fix it like a guru. I'm loving it!

@rayofcreation3996

4 жыл бұрын

Taltech chip you said it right. Yes its like meditation. You feel so calm, introspective, alert and I'm the end you feel exuberant with joy and feel so positive. I've even told Sorin and my friends that you watch one of his videos first thing in the morning and you feel great to take on the day right? That's why I suggested Sorin not to edit his videos and I'm sure he won't do that. Good luck to you and yours, from India. 👍😊

Nice to see you back Sorin. Hope you and yours enjoyed your Holidays and you are refreshed enough for a HARD job many thanks

Thank you Sorin for the huge amounts of information about the switching power supply and a photocoupler Which previously don’t know about it how its works Big thumbs up

Just wanted to say how much I’m enjoying these, and am now inspired to dig into my collection of “someday” repair projects. Thanks!

Thank you Sorin. I learned a lot how to diagnose the problem. On a basic switching power supply. Thank you for the time.

This makes me a bit more confident to fix the power supply of my B&W Zeppelin Air. Thank You, learned a lot.

@sergeaudenaert

5 жыл бұрын

As we speak, I am repairing a zeppelin air - all the electrolytes were dead... and 4 diodes - unfortunately I cannot put hands on a schematic, so it will still be a challenge...

I had this oscilating problem once and it was exactly the opto coupler thing too! Good job! Thanks for the video.

I'm new here and I need to sign up right away. You're a great teacher! Your skills are amazing.

Hope you and your family had a great holiday. Good to have you back.

Thank you for the great lesson and for the valuable time you spend to teach us!

Inca un video reusit si apreciez faptul ca este facut cap coada fara editari asa cum se intampla de obicei in diagnosticarea si reparatia unui device. Poate faci un video strict cu modul de functionare al surselor tv pe partea de invertoare backlight. Felicitari pentru munca depusa.

You are back! And with another great video 🤓

Sorin, thanks for this video. Have been doing repairs on PSU for many years, most of them easy, some hard to find the real problem as things interact. Your way of thinking and explaining on the secondary feed-back to the primary was great ! I have never been thinking about testing the cut-off voltage level, like you have tested the 12 volt on the opto directly, fantastic. Please keep up the great work and try to enjoy yourself whilst making the videos, like we do watching them :-)

@rayofcreation3996

4 жыл бұрын

Paulo da Graca well said. Thank you. Good luck.

Hope you a great holiday! Really great video, I like these shop workflows scenes, nice to watch and learned a lot. Good job!

Wow. I wish I had your problem solving skills. You're so methodical in your approach. Excellent skillset!

A very instructive vidéo, many thanks Sorin !

Good knowledge! Always interesting to watch the troubleshooting part.

Thanks for the detail explanation along with the capacitors discharge or shorted to ground. Your oscilloscope detailing is really impressive. Thanks for the teaching and sharing. Gain a lot

Excellent job Sorin! All the best to you.

The first time i see someone ho knows whta he is doing , the great explanation , thank you Man

Perfect explanations! Thx Sorin!

great video this is the kind of video that you really can learn from, please more like this thanks a lot

Loved it ,great tutorial.

Thanks Sorin I'm Watching your videos from Guatemala Great Videos!!

Good job Sorin. Good to know that this part can cause that type of issue. Kciuk w górę :)

Thank you, this cleared up a lot of questions that I had.

Sorin, once again you come thru. I was troubled with a stereo I was repairing for myself. Then the magic came from your mouth, Its usually the 431 that goes bad. I found it as a small smd on the underside of the board. Replaced it and problem solved. It had not broken down completely , it was cutting the voltage down, which was confusing. Thanks again :)

multumesc , am inteles in sfarsit cum lucreaza un octocuplor, respecte pentru munca depusa

sorin siir i really missed you we're celebratin eid in Algeria so i wish you all the good stuff and happiness thank you so much

@rayofcreation3996

4 жыл бұрын

TheEthical H that's so nice of you indeed. Love.

Esti genial Sorin cat de bine explici. Multumim din suflet!!!!

I've been searching for a video like this, thanks

greeting from Malaysia...the best electronic teacher!

FANTASTIC VIDEO!!!! FANTASTIC REPAIR!!!

Thanks for that video. Learned a lot

Opto coupler feed back from secondary power which feeds back secondary output voltage to the switching drive IC in primary drive. Drive IC sends pulse width switching pulses to FET which in turn drives primary side transformer . Typical switch mode power supply feedback loop. Your correct. Primary needs to know what secondary voltage is.

Thank you Sorin . Great video as usual . :-}

thanks Sorin,great lesson

just amazing , thank you for that time , well done and much appreciated

Nice fix. Great lesson. Nice feeling to have a win. :)

Merci Sorin ! Vidéo très intéressante !

Multumesc! I previously fixed a cheap SMPS just for the sake of it, since the parts cost me more than the PS. However I did't know the trick to check the low side regulation. Salutari din Galati!

Hi from turkey. I like your works :)

Very nice troubleshooting.

Helpful video 👍

Thanks teacher for this lesson.

Excellent job

Mr Sorin you are unbelievable !

fantastic lesson thank you.

Perfect as always. 👍

more lesson from switching power supplies professor.thenks for that video.

I love this man!

Thanks Sorin? great video as usual.

Simply great!

Great video😊

This is good info. I probably trashed/destroyed some boards in the past because of this, or because of the tl431.

Superb fault finding!

you're great teacher

a lot of information thank you

Great one!!

great video

That was a hard one good job👍🏻👍🏻

thanks a lot i just same fault on smt580 repaired GOOD TIMING

@charlesdorval394

5 жыл бұрын

Good timing here as well, I have just dismantled an LCD monitor with power supply issues

Master of electronic. what a brain!

good analysis ...... thanks

Excellent!

Brilliant!

Good job man 😉

good work

Good job

thank you repair school

Thank you so much.

N1 very interesting all time.. Thx

Good Job

Welcome back !!! Next time say " I ll be back " ;)

thank you so much sir

Thanks Sorin. Please can you go into more detail on how the TL431 works. What actually sets the voltage reference?

Good job! Did you miss a screw on the PCB to chassis frame?

Would love to see a collab with Louis Rossman that would be quite interesting. Great video as always maestro

You are the best

Nice find of an uncommon fault, with explanation

I'm a pharmacist and could understand what was about. That's a professor!

Well good one .

Bine te-am regasit !

It would be nice if you would do some trouble shooting and repair of cheap video cards off something like ebay so that some of us can learn the correct process. I have tried removing items and checking them, injecting current and voltage without any luck. There are people doing this on expensive cards that look nothing like the cheap cards and they move so fast and with the camera back so far that you cannot see what or were they are checking things. Thanks for your time. Stay safe.

Wow very nice troubleshooting boss...but can we test the opto coupler using a multi tester???

Welcome back

thank you ,i have a problem with this ic tea 1716 in led tv power supply NO POWER, her problem is that it was exposed to high voltage, and I found the main capacitors swollen, I replaced them, but the IC heats up greatly, but it is fine because I removed it and tried it in another card and it worked fine. Where is the problem? Is it in the components surrounding the ic tea 1716? but which pins of ic responsable for overvoltge or which components must be change smd capacitors and resestors or all them.

Hello man we miss you As a muslim I wish for you Eid mubarak with respect and good health

welcome back

domnule Sorin, va rog o parere: am un tv BUSH dled 49 inch. functineaza normal timp de 10-15 minute apoi ramane fara backlight (dispare lumina la display ,tv-ul ramanand in functionare cu sunet si toate comenzile); Daca il reconectez are acelasi simpton (10-15 minute ..). Condesatorii arata bine, nimic ''puscat'' pe sursa. Am sculele necesare sa pot schimba piese (pistol de lipit, sacaz kalafonia, cositor zacro 0.6 mm,desordering wich,,,)si un pic de cunostinte ca si amator. Locuiesc in Dagenham si nu am masina proprie sa vin la dumneavoastra la shoop cu tv-ul. Multumesc !

I need some advice have got a laptop Asus S500C and video signal is gone both on hdmi and the screen. Any idea how to fix it?

You can't necessarily tell if the capacitors are fine just by looking at them. At least half of the bad capacitors I have found with an ESR meter, looked perfectly fine, but they were causing the units not to power on. I can't believe that you don't have an ESR meter. The "Blue ESR tester" is a great meter because it gives accurate and consistent readings instantly. The very cheap ESR meters can take a very long time to get a reading.

Awesome..

instead of melting, I had one that I used a Dremel tool to cut the piece out.

Nice

Traiasca cel mai mare electronist !!!