#213 Detailed step by step SMPS Power Supply repair. Loaded with tons of repair tips.

where is the ground from these smps

Thanks a bunch for this! Such a broad view and lots of information condensed in this video!

Super detailed and very educational. I was trained as an EE many years ago but have not practiced as one for over 20 years but I’m jumping back in now as a hobby and it’s great to get a refresher on basic principles like you offer here. Keep up the except work!

Amazing video. Videos like these are helping me to learn how electronics work and slowly build up my knowledge. Very enjoyable 👌

Great explanation

Could you do the same for my SMPS? It's from a Crate guitar amp. I fried something when a surge accured at my house. I can send you schematic if you could tell me where to probe at points to find faulty component.

Brilliant diagnostic work! I have a SMPS that operates my disabled wifes reclining chair that she sits and sleeps in. The original PSU failed recently failed so I bought her a cheap Chinese replacement replacement but I would like to repair the original unit. You have given me many avenues to try and fix it.
Many thanks
Lynton
G4XCQ

Seems interesting, but really really really to slow and too long. Really. Thanks

No output from voltage regulator. With power off, did you check that test point for a short to ground?

I ran a Motorola Communications Business for 26 years, and watching you work with all the high tech equipment, makes me think of the thousands of dollars I could have made if I had excess to such at the time.

I still have my old isolation transformer. I sometimes have some line noise and was wondering if the isolation transformer would remove the line noise. I think it may be coming from the refrigerator, just not sure. It could be some vortex over my QTH messing up my VHF frequencies. I've only noticed it on VHF and never HF. What you suggest? W Rusty Lane K9POW in eastern Tennessee

Linear power supplies are my specialty when I was a tech. I'm 72 now and just cannot see as well as when I was younger. I understand linear supplies better than switching supplies. I have found that failing diodes are the most common failure in linear supplies. Of course I only have 120 volts AC to deal with here in the US. Very seldom do you have to replace a failed capacitor. I've also seen burnt resistors in the circuits. You can make most repairs with a good multi-meter. W Rusty Lane K9POW in eastern Tennessee

hai sir that solder gun is it possible to tell me how i can get one for my self and what the name of it

So super sir thank you.

Thanks!

Excellent video, a simple question for you. Is there a way to calculate the minimum input current required for the smps to start up properly please?

Hindi English

Jay shree ram

I know this IC a operation amplied but what’s kind

explant whats kind of and IC a 3 pints

how do you workout let’s say a 25k ohms in the inside an amplie when I test them it shows 18k ohms when I remove it from the ampli

a 240 volts AC power it will killed any person if they don’t understan it run through the body and out of the body

good job dear.

Too slow, repeat and repeat.
Introduced the clip on the error amp how many times, same with many other parts of demo.
Too many circular conversations that immediately go back on what has just been said.
No wonder its so long.....zzzzzzz.......

Hello Peter great job please tell me, if I use the diff head. Test probe can really don't need what's called an Auto transformer, to get the flooting point and safety working with scope??

Hi Peter how much do you charge to repair amps I have 2 heavy hitters

Thank I Ike it

Sir do you have abb powersupply cp24/20 driver ic number it is blown off pls help me to have that number it is 8 pin ic

Great video. You have all the fancy toys.

Thanks for sharing

Sir can u highlight me on how to connect universal power module

Awesome class, thank you.

Hi Peter, just watched and enjoyed this video again.
Thanks for the warning not to use a valuable and precious scope for circuit measurements!
To prevent scope damage, I use a 500VA isolation transformer, that works fine and prevent main voltage hazardous situations.
Thanks a lot for all your great videos!
73’s, Nanko, PA0NVY

Sir can pulse be sent to igbt gate by only transistor (8550 and bc 548b) in smps ( without microcontroller or pwm ic) if yes then how?

Man !!!!you speak and troubleshoot very very slow .and why you do not take away the PCB board and do comfortable testing points .most of what goes bad with these power supplies are the caps ...is that a discovery ?

Nice Multimeter it would look good on my bench ☺

Thank you TRX!

Hi awesome. could you refer a smps book ? I would like to learn more from power supply’s . Thanks.

Thank you sir .
informative video about S.M.P.S repairing.

999 likes is now 1k !

What Make and Model is the ESR Meter that you're using?

I do not know how I missed this tutorial. Out in January for me to only come across it in September. This tutorial is fucken too good, hammering the points home practically as well as theoratically. I wish you can do one on VFD's.
Thank you very much.

26 Y ears is a long time. But made 1 or2 years before that.

Very nice video. Professional work. For me missing the scope signal from both mosfet gate keys bcos I wonder over this trick:
How it work and what for is implemented driving upper key mosfet gate via other transformer - so my question is:
1. Both mosfet are switching in this same time or this floating source gate doing any delay between up and down key?
2. What here is domination wind - from gate side or high side of transformer? Simply culd you explain how it work an why its implemented?

btw. first time I saw forward 2t with two main cappacitors in series.
Even for me I can put 2 caps on 400V for less stress this units. Also less current leaks when use 50% nominal voltage of cappacitors.

Man you have got some test equipment in there👍👍👍

I connected my oscilloscope directly to the mains. Even though it was a battery one it made a right old mess of the innards. The thing made a noise like 1000 components crying out in pain.