Some things are completely obvious unless you are unfamiliar, and just hearing you work through this and say "if it reads higher than it should, then it suggests there is a problem with the resistor" really worked for me, and I thank you. Some may laugh at that statement, but I really appreciate the way you just talk your way through these videos (with added text comments wherever needed!) and let us hear your thought processes as you explain how you expect a circuit to work vs what you find as you probe with the meter. I'm not sure you can appreciate how helpful your videos are in enabling people to understand and repair all kinds of electronic equipment, but I certainly appreciate your work and wish you the best for 2023.
Thanks to the circuit that you have drawn in this video, I was able to fix a 700 watt Thermaltake PSU. It is like you have created a library or an encyclopedia with this channel. Richard, you should publish a book with those circuits that you are drawing in your videos. I would absolutely buy it :D Great work as always, thank you for your help.
The only cost to save this PSU from becoming e-waste was a € 0,01 resistor and one hour of work. Imagine how many poor electronic devices could've been spared from eternal doom if someone cared to have a look at their internals. I enjoyed the clear explanation of how these kind of PSU's work. They don't come with a schematic in the box, unfortunately.
thank you very much Richard this is the content we love, your explanation was excellent and I learnt a lot. I hope to see more ATX power supplies, graphics cards, motherboards, laptops repairs. Etc in the future. Have you considered doing some game console repairs as they do seem to draw a large audience.. Even if you are not familiar or experienced in repairing these you could do trying to fix consoles repairs which I think would be very interesting and entertaining. All the best for the future with your TH-cam channel.it's my number one channel.
@@LearnElectronicsRepair Yeah it is, you do spot a few car booty ones so it's something I'd like to see too, PS1 PSU, XBOX everything, N64 PSU, I bet there's some interesting things you can bring home, fix and flip on fleabay using the same methods you value your PC bits.
Love how your drew out that typical circuit on paper and then used the knowledge go back to the circuit and explain what to look for and how it all works. almost like SMPS in a nutshell. Really got a lot out of this, thanks. Two thumbs up.
Yeah, if subscribers keep watching videos I get some income from the advertising they watch so I figured it's a good idea to keep them alive 🤑 That was a joke by the way, before anyone starts chewing my ear 🤐
Another great fix and a great instructional video. I think these are the best electronic tutorials on TH-cam. Thank you for the time you put into making them. Cheers
Just discovered your channel last night while searching for content to test and repair a digital ballast for a failed flourescent light in the garage. I understand very little of this but I love watching your diagnostic technique and find this type of stuff fascinating. I'm struggling with a printer power supply at the moment and also a car battery charger (digital type) out of lidl. 😄 Thanks for making the video and for taking the time to upload and I wish you a happy, healthy and prosperous new year.
Richard, here's another thought: if you have spillages on any of the motherboards use a bottle with 80% filled with isopropyl alchol and 20% water, why because most spillages appear to be water soluable. Then use a toothbrush to clean it off, better still use a motorized one. Also you could use what is called a flux & boil routine, where you use flux and your heatgun! (I pick my ideas from elsewhere, to help you out.)
Thank you very much, I wish I had discovered your channel earlier, it has been a big blessing to me. Once again thank you very much and continue sharing your Wonderful knowledge on electronics
Glad you enjoyed it. The amount of advertising you see is nothing to do with me, this video has exactly the same monetization settings as all the other ones.
@@LearnElectronicsRepair I wasn't referring to TH-cam advertising. These are filtered out by the casting plugin. The sponsors like "PCway" etc tend to detract from the true subject of "Electronics Repair". This is not a complaint. Just an observation.
Thanks Richard, I have a computer with a non standard PSU and this might help me with the fix. I haven't expected a resistor being a culprit. That was a surprice for me. Please find another one to fix so we can see a different kind of PSU not working problem. 😍😍😍 THANKS! And a happy new year!
Hi Marcel, I've made a lot of PSU repair videos on the channel - check out the playlist th-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html I also have another new PSU repair video to publish tomorrow 😉
@@LearnElectronicsRepair Thanks Richard, I still have a lot of videos from your collection in the queue. This one was very interesting mainly because it explains the basics of the PSU's inner workings. Till now I avoided the 320V stuff coz safety, but now I am warming up to it. ⚡⚡⚡
I'm actually learning so much from you. I love this video, you are a Wonderful teacher. PSUs are low value devices, but a high carbon footprint. Would you recommend a repaired power supply over a new power supply? Would you recommend a repaired power supply to a hospital? I likely would given the chance to choose higher quality components. What are your thoughts if you have a second.
Hello from france. Happy new year to all. Thank you for the vidéo, your explanations are excellent, my english isn't very well but i undestood everything ;-) Could you explain more psu basics?
richard you do great job there , please make more videos about power supply, so we can learn more about faulty types , if there no short anyware could be resistor , good i didn't expect that , my power supply is FSP 850w gold Hydro G its very complicated it have 6 board inside and have 1450 ohm on green and black what you think its the problem thank you .
It would be helpful if instead of waving around in the general area with the probe leads, you placed the probes on a given lead or pin and clearly stated what it is you are pointing at, particularly after flipping boards over.
Great technique for handling switch mode power supplies Richard. Complacency will kill you! Have you ever tried connecting the input of a SMPS to a low voltage DC supply for testing? Thank you for another interesting video. Regards, David
I've sometimes used my bench supply to power the smps controller chip to see if it oscillates (with no AC input) and also sometimes used a transformer from an old amplifier, I think it was about 90V, to power a SMPS. I actually have an isolation transformer on my bench power socket - the one I use for the the device under test - and this also helps make things safer. Isolation transformers can be a bit hard/expensive to find, but most SMPS will work in the range 85V-240V I would recommend anyone living in a 240V region to get a used 110V site transformer - those yellow things that builders and similar tradesmen use - and power the SMPS from that while working on it. This makes it considerably safer. You can pick a high powered one up for about £25-£35 in the UK - these are actually sold prices on ebay www.ebay.co.uk/sch/i.html?_from=R40&_nkw=110v+transformer&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=ST3+4RP&_sargn=-1%26saslc%3D1&_salic=3&_sop=12&_dmd=1&_ipg=60&LH_Complete=1
@@LearnElectronicsRepair I was referring to actually connecting a DC bench supply to the AC input terminals and running the SMPS as a DC to DC converter. The main advantages are lower voltage on the high side and the "hot" ground can be grounded and then a grounded piece of gear such as an oscilloscope can be used for troubleshooting. Of course the SMPS must not have a load on it. I have used this technique when repairing bench type SMPS with regulation, intermittent operation and noise issues - probably not necessary for short circuits.
Have an amplifier that went down during a brownout a few years back. It was powered on but not in use. I’ve checked all the obvious (fuses, caps, connections) but have no idea where to begin. Any vids of repairs to circuits taken out during a brownout?
44:06 - I wanna ask something about power of resistors or diameter, since you found the fault, would it be better to use higher wattage resistors but the same resistance? Since that wattage obviously failed? I think its good to good to use higher wattage resistors.
There is so little current flowing through 40 Mega ohms that even if the IC or capacitor was short it would cause almost no wattage. I think there is something about high value resistors in high voltage circuits that causes them to gradually go high resistance, because this is quite common in valve (vacuum tube) circuits which are also high voltage low current. I honestly don't know the physics of this problem, just how to diagnose it.
@@LearnElectronicsRepair I agree, but if we multiply working hours? How many years then months then working hours we get from PSU? Its natural that all components go crazy over some period.
hi can you elaborate or give schmatics on light bulb idea ? ive seen this on electronics repair for finding shorts but not knowing the schematics on how to create one thanks.
Hi, could you answer a question that is puzzling me? Normal calculation for circuit protection by fuse in plugs 3 pin as per UK standard. Would see a 3 amp fuse in an electrical appliance of 450 Watt.Ref 450 watts divided by 240 volts = 1.875 So why do l find my ATX PSU of 450 watt fitted with a 6 amp 20 mm quick acting glass fuse?
Great video , I have a question my pc starts there is the powerled and restarts after 1 second , i checked for shorts on the motherboard atx connector but all is good. What could be the problem? Sometimes 1 in 10 times it starts completely and keeps working.
Hi This is Star Gate Electronics in Uitenhage, Try using a microwave Light Bulb with 2 leads with prods from a multi meter to discharge any high voltage on any power supply 's caps🥺
![ILLSLICK X YOUNGOHM - We're The same [Official Video]](http://i.ytimg.com/vi/yUJNkobYR0E/mqdefault.jpg)
Some things are completely obvious unless you are unfamiliar, and just hearing you work through this and say "if it reads higher than it should, then it suggests there is a problem with the resistor" really worked for me, and I thank you. Some may laugh at that statement, but I really appreciate the way you just talk your way through these videos (with added text comments wherever needed!) and let us hear your thought processes as you explain how you expect a circuit to work vs what you find as you probe with the meter. I'm not sure you can appreciate how helpful your videos are in enabling people to understand and repair all kinds of electronic equipment, but I certainly appreciate your work and wish you the best for 2023.
Thanks to the circuit that you have drawn in this video, I was able to fix a 700 watt Thermaltake PSU. It is like you have created a library or an encyclopedia with this channel. Richard, you should publish a book with those circuits that you are drawing in your videos. I would absolutely buy it :D Great work as always, thank you for your help.
The only cost to save this PSU from becoming e-waste was a € 0,01 resistor and one hour of work.
Imagine how many poor electronic devices could've been spared from eternal doom if someone cared to have a look at their internals.
I enjoyed the clear explanation of how these kind of PSU's work. They don't come with a schematic in the box, unfortunately.
This requires knowledge as this could cause death if you will be careless.
thank you very much Richard this is the content we love, your explanation was excellent and I learnt a lot. I hope to see more ATX power supplies, graphics cards, motherboards, laptops repairs. Etc in the future. Have you considered doing some game console repairs as they do seem to draw a large audience.. Even if you are not familiar or experienced in repairing these you could do trying to fix consoles repairs which I think would be very interesting and entertaining. All the best for the future with your TH-cam channel.it's my number one channel.
OK I will keep that in mind, after all it's all just electronics... yeah?
@@LearnElectronicsRepair Yeah it is, you do spot a few car booty ones so it's something I'd like to see too, PS1 PSU, XBOX everything, N64 PSU, I bet there's some interesting things you can bring home, fix and flip on fleabay using the same methods you value your PC bits.
Love how your drew out that typical circuit on paper and then used the knowledge go back to the circuit and explain what to look for and how it all works. almost like SMPS in a nutshell. Really got a lot out of this, thanks. Two thumbs up.
You are the best teacher of all of the electronics repair technicians who make videos.
Frank
Frank Reiser Video/Audio Service
What a great way to start the New Year! With more knowledge.
Happy New Year, best of luck for 2023 from the 🇬🇧
Another master class. Outstanding
Hi. I am so pleased about the protection bulb that you used :) I am using it too, it saved me so many times, I could not count...
Learnt something and very nicely explained along with systematic trouble shooting. Excellent.
glad to see you talk about the safety concerns. very good.
Yeah, if subscribers keep watching videos I get some income from the advertising they watch so I figured it's a good idea to keep them alive 🤑
That was a joke by the way, before anyone starts chewing my ear 🤐
@@LearnElectronicsRepair lol.
Thank you, professor, and "Happy New Year" for 2023
Another great fix and a great instructional video. I think these are the best electronic tutorials on TH-cam. Thank you for the time you put into making them. Cheers
Just discovered your channel last night while searching for content to test and repair a digital ballast for a failed flourescent light in the garage. I understand very little of this but I love watching your diagnostic technique and find this type of stuff fascinating. I'm struggling with a printer power supply at the moment and also a car battery charger (digital type) out of lidl. 😄
Thanks for making the video and for taking the time to upload and I wish you a happy, healthy and prosperous new year.
fantastic explanation Richard :) happy new year to you :)
That's very satisfying. I wish I could say I'm now ready to fix a few of these but maybe someday!
Great video Richard, I always learn something new - happy new year to you and your wife, all the best from Bradford UK.
Nicely done and explained, you also covered the fact that a circuit is not always true to how you would expect it to be.
Great video. It was very informative. I only wish you had included video on the replacement of the resistor.
Richard, here's another thought: if you have spillages on any of the motherboards use a bottle with 80% filled with isopropyl alchol and 20% water, why because most spillages appear to be water soluable. Then use a toothbrush to clean it off, better still use a motorized one. Also you could use what is called a flux & boil routine, where you use flux and your heatgun! (I pick my ideas from elsewhere, to help you out.)
Thank you very much, I wish I had discovered your channel earlier, it has been a big blessing to me. Once again thank you very much and continue sharing your Wonderful knowledge on electronics
Happy New Year Richard. Another super video and brilliantly explained.
You are blessed with so much knowledge and experience. You are fantastic teacher!
Good job. I love to see electronics saved from e waste.
Happy new year to you too, Richard!
Great explanation thanks for taking the time to explain why the different components are used and what to expect when testing. Happy New year
Very nice walk through, explanation and repair of this PSU. HNY to you and your family too
Thanks for a very informative video on an interesting subject. With no advertising. Hint. Keep up the good work and all the best for 2023 to you too.
Glad you enjoyed it. The amount of advertising you see is nothing to do with me, this video has exactly the same monetization settings as all the other ones.
@@LearnElectronicsRepair I wasn't referring to TH-cam advertising. These are filtered out by the casting plugin. The sponsors like "PCway" etc tend to detract from the true subject of "Electronics Repair". This is not a complaint. Just an observation.
Thanks once again Richard. Best wishes for the New Year.
Great video Richard! Directly knew where to search for and found the problem!
I learned quiete something in this video!
Thank you for the video and Happy New Year! Keep up the good work on these very informative videos.
Nice one Richard! I was expecting the usual power device failure.
Happy New Year Richard, watched the full recording. Learned allot from this video, I hope I can put this into practice one day !
Well explained, Richard , and a Happy New Year.
Nice analysis and repair . Happy New Year !
Many thanks for an excellent video. I thoroughly enjoyed your explanation throughout and I've now subscribed to your channel.
Great watch. Still non the wiser (my fault) great to see you fixing it. Well-done.
Just stick around here and one day you will have a 'light bulb' moment in your head and everything will all come together and make sense
Thank you for sharing your knowledge! And happy New Year to everyone!
This should be required reading......cheers and Happy New Year !
Thanks for the awesome video Richard! Happy new year from 🇺🇸
Happy New year great teacher. Step by step explanation.
Great lesson, thanks!
Thank you my friend! Very informative. Happy New Year mate!
Thanks Richard, I have a computer with a non standard PSU and this might help me with the fix. I haven't expected a resistor being a culprit. That was a surprice for me. Please find another one to fix so we can see a different kind of PSU not working problem. 😍😍😍 THANKS! And a happy new year!
Hi Marcel, I've made a lot of PSU repair videos on the channel - check out the playlist
th-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html
I also have another new PSU repair video to publish tomorrow 😉
@@LearnElectronicsRepair Thanks Richard, I still have a lot of videos from your collection in the queue. This one was very interesting mainly because it explains the basics of the PSU's inner workings. Till now I avoided the 320V stuff coz safety, but now I am warming up to it. ⚡⚡⚡
Wonderful theory of operation is very helpful for troubleshooting. Thank you.
Exellent tutorial ,I have the same problem with ATX power .sply and this is an idea to start the repair thank's mASTER
thank you. That was nice peace of knowledge.
Very nice fault finding. I have a few faulty PSU-s as well...maybe I'll check them again with your methods. Thanks for the videos.
I really like how you explain things. Keep it up
Hi This is Stargate Electronics herein Uitenhage in the Eastern Cape in South Africa. Sorry for adding this info only now
Happy New Year! Great Video again. Thanks
This was amazing, Thank you so much for taking the time to make these video's.
Many thanks for all your video’s and explanations Richard and a very happy new year to you and your family 👍👍
Great video and explanation. Thanks!
Very good! Happy New year to you also!
Happy New Year to you Rich.
Heya, yes 1 more good explained repair video learning every vlog
Great video, Richard.
Happy New Years to you also.
Happy New year, great video.
Absolutely brilliant
Wow, great content, nice to learn form a very experienced guy, thank you very much
Thank you!
I'm actually learning so much from you. I love this video, you are a Wonderful teacher.
PSUs are low value devices, but a high carbon footprint. Would you recommend a repaired power supply over a new power supply? Would you recommend a repaired power supply to a hospital? I likely would given the chance to choose higher quality components. What are your thoughts if you have a second.
Wow! Very nicely explained. Thanks!
Happy New Year to you also.
what a good repair thanks for the video happy new year
Happy New Year 🎆
I could watch you repair SMPS all day :)
Hi Richard nice fix
Thank you HNY👍
Thanks for your post.
Happy new year richard love the videos! By the way did you ever fix that powered mixing desk? Waiting for a part...... I dunno 10? Lol
Happy New Year!
Very interesting. Thank you.
Hello from france. Happy new year to all. Thank you for the vidéo, your explanations are excellent, my english isn't very well but i undestood everything ;-) Could you explain more psu basics?
I've made a lot of PSU repair tutorials - here is the playlist, and enjoy
th-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html
Happy new year from devon uk
Happy new year
Thanks, great video !
thank you very much, it was very informative
Brilliant, can you provide schematic for your lightbulb circuit, I know it's basic stuff, but wanna see different implementation
richard you do great job there , please make more videos about power supply, so we can learn more about faulty types , if there no short anyware could be resistor , good i didn't expect that , my power supply is FSP 850w gold Hydro G its very complicated it have 6 board inside and have 1450 ohm on green and black what you think its the problem thank you .
This is brilliant
Thanks for sharing🙏
It would be helpful if instead of waving around in the general area with the probe leads, you placed the probes on a given lead or pin and clearly stated what it is you are pointing at, particularly after flipping boards over.
Thanks a loto, great lesson
Thank you so much for sharing all this knowledge, I have so much since subscribing to your channel.
What usually causes a resistor to fail ?
Nice work. 🥂
Great technique for handling switch mode power supplies Richard. Complacency will kill you! Have you ever tried connecting the input of a SMPS to a low voltage DC supply for testing? Thank you for another interesting video. Regards, David
I've sometimes used my bench supply to power the smps controller chip to see if it oscillates (with no AC input) and also sometimes used a transformer from an old amplifier, I think it was about 90V, to power a SMPS. I actually have an isolation transformer on my bench power socket - the one I use for the the device under test - and this also helps make things safer. Isolation transformers can be a bit hard/expensive to find, but most SMPS will work in the range 85V-240V I would recommend anyone living in a 240V region to get a used 110V site transformer - those yellow things that builders and similar tradesmen use - and power the SMPS from that while working on it. This makes it considerably safer. You can pick a high powered one up for about £25-£35 in the UK - these are actually sold prices on ebay
www.ebay.co.uk/sch/i.html?_from=R40&_nkw=110v+transformer&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=ST3+4RP&_sargn=-1%26saslc%3D1&_salic=3&_sop=12&_dmd=1&_ipg=60&LH_Complete=1
@@LearnElectronicsRepair I was referring to actually connecting a DC bench supply to the AC input terminals and running the SMPS as a DC to DC converter. The main advantages are lower voltage on the high side and the "hot" ground can be grounded and then a grounded piece of gear such as an oscilloscope can be used for troubleshooting. Of course the SMPS must not have a load on it. I have used this technique when repairing bench type SMPS with regulation, intermittent operation and noise issues - probably not necessary for short circuits.
Thank you very much
Have an amplifier that went down during a brownout a few years back. It was powered on but not in use. I’ve checked all the obvious (fuses, caps, connections) but have no idea where to begin. Any vids of repairs to circuits taken out during a brownout?
44:06 - I wanna ask something about power of resistors or diameter, since you found the fault, would it be better to use higher wattage resistors but the same resistance?
Since that wattage obviously failed? I think its good to good to use higher wattage resistors.
There is so little current flowing through 40 Mega ohms that even if the IC or capacitor was short it would cause almost no wattage. I think there is something about high value resistors in high voltage circuits that causes them to gradually go high resistance, because this is quite common in valve (vacuum tube) circuits which are also high voltage low current. I honestly don't know the physics of this problem, just how to diagnose it.
@@LearnElectronicsRepair I agree, but if we multiply working hours? How many years then months then working hours we get from PSU? Its natural that all components go crazy over some period.
@Richard .. use cats61flir thermal camera .. 📷 it works much better and can connect to a pc via wifi or USB.. fixed on a desk it's amazing
Inbox me I would like to share the information
hi can you elaborate or give schmatics on light bulb idea ? ive seen this on electronics repair for finding shorts but not knowing the schematics on how to create one thanks.
Hi, could you answer a question that is puzzling me?
Normal calculation for circuit protection by fuse in plugs 3 pin as per UK standard.
Would see a 3 amp fuse in an electrical appliance of 450 Watt.Ref 450 watts divided by 240 volts = 1.875
So why do l find my ATX PSU of 450 watt fitted with a 6 amp 20 mm quick acting glass fuse?
Wow Rich give me link to that lovely voltage tester please 🤪
Great video , I have a question my pc starts there is the powerled and restarts after 1 second , i checked for shorts on the motherboard atx connector but all is good. What could be the problem? Sometimes 1 in 10 times it starts completely and keeps working.
Hi This is Star Gate Electronics in Uitenhage,
Try using a microwave Light Bulb with 2 leads with prods from a multi meter to discharge any high voltage on any power supply 's caps🥺
For some reason captions are unavailable for this video; will you look into it please... Thanks!