Learn Electronics Repair - 2022-04-25
LER #232 How to Repair ATX PSU, Theory, Circuit Designs and Practical Fault Diagnosis 0:00:00 Chapter 1. INTRO 0:03:00 Chapter 2. SAFETY FIRST 0:10:55 Chapter 3. HOW TO SAFELY DISCHARGE HIGH VOLTAGE CAPACITORS 0:16:31 Chapter 4. COMMON ATX DESIGNS – TYPE 1 0:31:50 Chapter 5. HOT GROUND AND SAFETY GROUND 0:40:57 Chapter 6. COMMON FAULTS 0:45:09 Chapter 7. COMMON ATX DESIGNS – TYPE 2 1:08:23 Chapter 8. UNDERSTANDING AND DIAGNOSING 5V STANDBY 1:12:58 Chapter 9. COMMON ATX DESIGNS – TYPE 3 1:29:17 Chapter 10. COMMON ATX DESIGNS – TYPE 4 1:33:07 Chapter 11. PRACTICAL REPAIR EXAMPLE 2:12:19 Chapter 12.EPILOGUE The ALL YOU NEED TO KNOW Series *Resistors* https://www.youtube.com/watch?v=ae-1qPx9Tww *Capacitors* https://www.youtube.com/watch?v=R9slJUqT6Ls *Inductors* https://www.youtube.com/watch?v=iOFmrR1E2s8 *Diodes* https://www.youtube.com/watch?v=YW3jpiQ4xpA *Zener Diodes* https://www.youtube.com/watch?v=trjbHhLERic *Transistors* https://www.youtube.com/watch?v=GDDwTbM9DLw *ATX PSU* https://www.youtube.com/watch?v=GjZtZNssroE *Amplifiers* https://www.youtube.com/watch?v=0oWBcTTeMNQ *MOSFETs* https://www.youtube.com/watch?v=LNu00nMBaaQ *Thermal Cameras* https://www.youtube.com/watch?v=v6Ll2v1brT0 *Power Adapters* Part 1: https://www.youtube.com/watch?v=IoSaaK71tGY Part 2: https://www.youtube.com/watch?v=MlDqQpM-VFE I work in collaboration with: The Electronics Channel (with Carlos and Detlef) https://www.youtube.com/@Theelectronicschannel Gran Canaria Uncovered https://www.youtube.com/@GranCanariaUncovered (with Detlef and Julie. Not electronics related) Det Builds Stuff - https://www.youtube.com/@detbuildsstuff8128 (Detlef) Retro Upgrade - https://www.youtube.com/@RetroUpgrade (Carlos) For All Your PCB needs: free $5 discount coupon https://www.pcbway.com/setinvite.aspx?inviteid=561767 Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission. TEST METERS Aneng AN8009 https://s.click.aliexpress.com/e/_DdWIynN https://amzn.to/469ZgOS https://www.banggood.com/custlink/mD3HS7d3eA KM601 https://s.click.aliexpress.com/e/_DBwTp1H https://www.banggood.com/custlink/KD3FIwEK67 VC480C+ https://s.click.aliexpress.com/e/_DEYs6ix https://amzn.to/3Q3LEz7 https://amzn.to/46tmNdo MESR-100 ESR METER https://amzn.to/3tiy8hK https://amzn.to/3RwvejK https://s.click.aliexpress.com/e/_DmirIEj XC6013L CAPACITOR METER https://s.click.aliexpress.com/e/_DmXD5zN https://amzn.to/3t71Nul https://amzn.to/3LDdcbO TM-902C TEMPERATURE METER https://s.click.aliexpress.com/e/_Dm9GAtZ https://amzn.to/3LFzERv https://amzn.to/3PTwuvW FNB58 USB ANALYZER https://s.click.aliexpress.com/e/_Dmd8TR1 https://amzn.to/3tb1QW8 https://amzn.to/46oMn30 https://www.banggood.com/custlink/mKm5ZwYvbh PCI POST ANALYZER https://s.click.aliexpress.com/e/_DBssfzN https://amzn.to/46m9Gep TL460S Plus PCI_E ANALYZER https://s.click.aliexpress.com/e/_DnBVP1z https://amzn.to/3ZERvOs MULTIMETER PROBE KIT KET05 https://s.click.aliexpress.com/e/_DE7nAyB OSCILLOSCOPES FNIRSI 1014D https://s.click.aliexpress.com/e/_DEzZMVh https://amzn.to/3RxMFk1 https://www.banggood.com/custlink/KKGVIfyvQP FNIRSI DSO-TC3 https://s.click.aliexpress.com/e/_DC8Djz5 https://amzn.to/3RBsgdS https://www.banggood.com/custlink/Gm3FZThmNi FNIRSI DPOX180H https://s.click.aliexpress.com/e/_DBX7auf https://amzn.to/468oooT https://www.banggood.com/custlink/GGGtS1Yvso BENCH PSU NPS3010W https://s.click.aliexpress.com/e/_DDPJtbD https://amzn.to/3rxsuIf https://www.banggood.com/custlink/3DDV8whE3j SOLDERING T12 Station with M8 9501 Handle https://s.click.aliexpress.com/e/_DFVdrD9 https://amzn.to/3FdG8Ul SUGON T26D https://s.click.aliexpress.com/e/_DFxpWw3 QUICK 861DW https://s.click.aliexpress.com/e/_DDo9wKj https://amzn.to/3PBOKZH https://amzn.to/3RCSqNh PROS'KIT SS-331H https://s.click.aliexpress.com/e/_DDo9wKj THERMAL CAMERA Infiray P2 Pro https://s.click.aliexpress.com/e/_Dmuj4a7 https://amzn.to/457PgEb https://www.banggood.com/custlink/DDGPI7hRvU MICROSCOPES Amscope Optical Microscope (copy) https://s.click.aliexpress.com/e/_DlhF4BV https://uk.banggood.com/custlink/mKGy7e0yww https://amzn.to/4675Qp0 https://amzn.to/459uvrY ANDONSTAR AD407 https://s.click.aliexpress.com/e/_Dl4xXrD https://amzn.to/3PSQKxJ https://amzn.to/48sxej4 EEPROM Programming TL866 II+ https://s.click.aliexpress.com/e/_DlsAR1H https://amzn.to/3RTCRB9 https://amzn.to/3LDu3Lu CH341A https://s.click.aliexpress.com/e/_Dk0W2Qb https://amzn.to/48IZiir If you would like to support this channel You can send donations https://www.paypal.com/paypalme/youtubeLER You can subscribe to Patreon https://www.patreon.com/learnelectronicsrepair You can click Join to become a channel member Thank you Richard
I really appreciate all your videos. I have been doing this professionally over a decade and 2 decades as a hobby. I still learn every day and I would like to thank you for filling in many gaps in my knowledge. Thankyou brother keep it coming please. Peace
Hi Sam, you are not the only one still learning, I am too. In a strange way actually producing these videos is also teaching me more. I guess none of us ever completely master electronics repair, there is always something else to learn.
@Learn Electronics Repair Yes brother I totally agree. In fact my work is moving much more in the direction of educating my clients also , sometimes we all learn new things. I have found the best way to approach all things a mystery is with honesty, a good heart and a hell of a lot of trial and error. Some say "failure" I say - well we learnt something so it is never a failure. Certainly learning is my love I just really enjoy the practical side of electronics , soldering and fault finding. As it gets more and more complex - we simply have to stay ahead of the curve but understanding really well fundamental basics go a long long way. Thanks again man, sorry to waffle ! Peace
By far the best channel on this topic. Down to earth real life. A lot better than some
I just started practicing my soldering and repairing pcbs but i have the utmost respect for components with high voltage like power supplies or anything that is connected to the "mains".
Thanks for the helpful information. I really want to try and repair some power supplies too and understanding how they work better definitely helps.
This is the 2nd video from your channel i have came across, and im loving the content =) Im a master technician in a car dealership, Your videos will help me save (in time!) a lot of people a lot of money =) Nobody will touch automotive circuitry where im from! keep them coming =) All the best from sunny Scotland
Thank you, and welcome from sunny Gran Canaria 😁
The PSU is the best introduction to into the repair Sektor
Your content is really awesome!!!
I can watch your videos for hours on end.
Most of my professional working life has been high end (medical, aerospace, etc.... none of this consumer electronics made in China junk) electronics so I had a "high opinion" of myself until I cam across your videos, then I realized I was not as good as I thought I was. You're the kind of bloke who teaches "grand masters" and not "beginners".
When you get hours of my attention span you must be good.
Imagine that I repaired switch-mode power supplies for a living and I was considered highly competent by my employer, but man I never came close to being the expert you are. Your knowledge is really impressive.
1:27:56 Hi Richard. We ARE interested! Looking forward for the video of that PSU's repair.
this is a super add on to this series :) very in depth on the ATX power supply's :)
Cool video, with probably enough material for a mini series. I like diodegonewild for power supply youtube videos too.
Powerful tutorial that was too short. Thank you.
Haha I'll try to make longer in future 😆
First one of your videos that I have watched. Also the first one that I actually come away from understanding what's going on! Great video. Thanks
You're welcome. Maybe you will try a few more. 😉
What a great video. You are a great Teacher on your knowledge you share . Don’t stop Thanks for taking your time on getting these videos out .
Cheers, mate!! I've always wanted to learn electronics and to repair my own stuff. YT and your channel make it possible for me to make my dream come true. Thanks and keep up the good work!!
Thank you, Rich! I ALWAYS learn from you no matter how short or long your videos are. You are very thorough! Cheers!!!
😂❤ that accent - yeah? 😂 lol Rather relaxing too. I tend to watch most videos at a faster pace and I’m genetically inclined to repair and build but not good at it. 😂 women ya know? Scrambled. Cheerio!
very detailed analysis, love your videos. I used to do electronic repairs, IT now, but makes me want to go back. Thanks indeed!
Best smps repair videos I have seen yet! Thanks
Very comprehensive. I definitely learned a lot! Thank you
And that was the intention. It's nice to see it succeed 😄
@Learn Electronics Repair the real test for me will be in diagnosing and fixing the 4 or 5 PSUs I have been holding on to in the garage!
I simply love this guy..watfched the vid without blink of an eye .will watch it again so I can understand from 2nd time :) though explanation is more then simple enough to understand.
King Richard, I find that all of your videos are awesome but this one in particular is your best IMHO
your work is so great i am sure many technicians will agree that it is really golden in the hearts of everyone, a lot of insight.!!! thank you..keep up the great work.
ص، شو اي شو شو شو عم عم
excellent video. It was very helpful to see a schematic and an explanation of how the circuit worked and current flowed through it. Really helped me to understand how the smps circuit worked and when you know how something works it really helps you to see what's wrong with the circuit.I purchased a couple of ATX nonworking power supplies of eBay to try and diagnose the faults. and thanks to your previous videos I fully understand the dangers involved with capacitors. I also have current limiter which I built from your design and an isolation transformer. thank you so much for the excellent videos, I will let you know if I repaired the two SMPS.
Please do - it helps everyone here to learn from others who are 'having a go' at fixing stuff.
Did you manage to fix them?
Excellent Tutorials! Keep Like this!
Thank You
Thank you so much for your wonderful lectures.
Super helpful video. I have started watching your vids from the start, and have picked up soo much. You have tied a few puzzled together for me, so thanks.
Thanks for sharing you knowledge... Greatings from Portugal 🇵🇹 🌟
Excellent 👌 very well explained!!
ty today i fixed my old psu :D , 12 volt schottky diode shorted 1 side
Therese videos are incredible pedagogic, even for a mathless beginner, with 4 thumbs, and actually also serves well as an ambient ongoing anti-bore surround therapy. Hot air!
Tobe honest, I got some tasting of a high voltage from a TV repair many years ago. For a "normal" high voltage of 220V I'm only getting pissed off a little and I might say a few swear words but that's it.
The high voltage I got from that TV years ago, I heard some discharge just like a spark sounds, I felt dizzy for a few seconds, gently pulled my hands out of the TV, had to sit down for a while and understood that I am very lucky to still be alive.
Never, ever since then I did work on anything recklessly.
Every time I took precautionary measures, every time I was working in electronics repair I took extra care, double checked precautionary measures every single time.
Never started to work on anything in a rush. It's "safety first" then it comes the working.
If I'm tired, I'd rather not work on anything.
This routine saved me a lot of trouble for many years.
I'm 54 years old now but I might've been already dead at 24.
Yes, I remember when it happened for that was the day when I was very close to dying.
Don't do what I did.
Take safety as the most serious and important thing in your life because it is the most serious and important thing in your life.
Thank for sharing your knowledge
My pleasure
Thank you very much for taking the time to make these videos and for choosing to use some life span to do so. I've got many of these to fix on old computers (just because I want to). I also have some similar supplies in some sub-woofer bass units with internal supplies that have quit and I look forward to using this info to help with those as well. Peace and be well.
Good evening and very grateful thanks from a recent UK subscriber. Took me a few days a bit at a time to watch the lot but I got there in the end. An amazing tutorial, the ATX PSU thoroughly demystified. Great safety first warnings, I would certainly tackle a duff ATX in the future (can"t make it any worse, right?) but would almost certainly refer back a few times to this vid. I am sure I will become very acquainted with this channel in the future. Once again thanks a lot. I enjoyed this one very much.
Hi Robert, thanks for your comments and it's great to hear you enjoyed the video.
Yeah this one got rather long (even by my standards LOL) but like you say, I tried to cover the whole subject and that is not easy and definitely time consuming. If it's any consolation it took me a lot longer to make it than it took you to watch it. 😉
Other than that I would just like to say welcome to the channel, and don't forget to check out the LER discord server
Learn Electronics Repair is now on Discord! Come and join the fun, it's free.
https://discord.gg/vam6YC8vwU
Very excellent video.
Fantastic video!
Thank you for the educational infomation your actually managing to teach me lol old dog new tricks kinda thing thanks
31:53 This the most important part about hot, not safety ground, which you cannot mix with normal ground during measurements. You have to see it.
P.s. Thank you again for that. Last time you've explained it to me in comment section, and it flip my repairs knowledge/experience upside down -because I finally understand how measure things on that hot area without making a short or killing my measurement devices.
Definitely that was one of the most important parts of this video. It's great to hear you 'get it' now. It is a big step forward, and it was the same for me back in the day when I finally understood this.
@Learn Electronics Repair nm.iip.m n, ko.
Good stuph. Well explained and useful. Somewhere along the line you must have went on a major redux of "uh" and "so" be because I watch an earlier vid of yours that I swear was composed of about 30% of those gap fillers. Well done! So much easier to stay attentive this way.
Well done.
Thank you.
Excellent, thanks for the video!
Excellent video. Thanks.
You are welcome!
Good evening. Very long video but...very informative as well! I have really appreciated the theoretically dissertation. Thank you so much Richard. I hope in a part 2 when you will receive the components to finish the excellent job. Regards from Italy. Ah!! Please, if I make any mistake in my English feel free to suggest the correction. This would be perfect to improve my language skills...along with repairing knowledge. Thanks in advance.
Don't worry your English is fine. I wouldn't suggest you perfect your English skills on my attempts to speak it. Apparently I don't speak English very well, despite being born and spending most of my life there LOL 😁
You crack me up with your intro, and have taught me a bunch! I can't help wondering where you're from or where you live. My Australian friend called himself a POME. Maybe you are too! LOL
Yeah I would be a Pommy in Oz, I'm from Stoke-on-Trent in England, where I would be a Potter - but I live and work in Maspalomas, Gran Canaria. I've been living on the island Gran Canaria since November 2016, where I would be an Immigrant (though some British call themselves expats, possibly because they think the Brits are too good to be Immigrants) Actually I consider myself neither Expat or Immigrant, but Nuevo Canarian instead.
Great vid mate thanks 👍
Light bulb (25W is ideal) is also good way to discharge high voltage capacitors. Additional benefit is you can observe bulb to see if caps are discharged.
Yep, that is a good idea 🙂 The light bulb needs to an incandescent or halogen 240V/120V as appropriate and not and LED bulb of course....
I'm using some cheap "discharge pen" from Aliexpress, originally bought for camera flash caps
@@kruno7150 Do you have a link?
Excellent
Thanks 🙂 This one took quite a lot of work to make.
Heya I love these vlogs for me they may have more detailed info ( I mean wen you drow the main componments I like to see alle the components drown and explanted what they do and how the work ect ect more to learn
This was a super awesome video overall. I especially liked the explanation of hot fround vs safety ground which is critical to understand in order to not blow expensive test equipment! Thank you very much!!
All good - as usual 🙂
Cheers!
This will be fun. 👍🇮🇪💚
@LearnElectronicsRepair - 2022-04-25
How to modify an ATX Analyzer to make it actually useful.
https://www.youtube.com/watch?v=yw747J-9F1s
@mattstroker3742 - 2022-04-25
Oh man, I love your videos. Great content!
@martymcfly7107 - 2022-11-26
Alors