This could have easily been just a "dead power supply with a dead capacitor" video. But like many other commenters I really appreciate the extra level of details. Both the setup to monitor the circuit and the detailed look at the datasheet were very interesting.
Are all battery powered scopes isolated? Are your scope probe and probe ground across the capacitor? I believe I watched a video where you repaired that Scopemeter. I love your videos. They are super informative without being overly technical. Thank you.
Very nice. I appreciate your effort to demonstrate how these power bricks work. UA-cam has enough "cheap shitty" videos which always contain the same conclusions. This video is unique in showing not only a failed quality unit but how it can be characterized and repaired. Thank you.
Another great example of why having a electronic DC load is so valuable at the bench...had a cable TV box PSU do exactly the same thing when I was troubleshooting the failure. Luckily had a spare and didn't go thru the repair process but knew exactly what the situation was from having the load t the bench. Thanks for sharing, great description as usual.
Excellent description of the psu. Thanks... still not brave enough to do anything other than check and replace capacitors on switched mode psu’s but the more knowledge I get the more comfortable I will be...
Thanks for the video and for taking the extra time to explore the circuit details and take measurements. With your knowledge you probably didn't have to do all of that to figure out the problem. Look forward to next video.
I thought it was that "bootstrap" capacitor from the start, it so often is when switchers work but have weak output. Really cheapass caps though, not even low-ESR by the looks of things.
isolation transformer for the power supply? At least I have a good excuse for not being able to solve one 36V PS. To be fair, that one is much more complicated, with a lot of SMD transistors on the secondary side
This could have easily been just a "dead power supply with a dead capacitor" video. But like many other commenters I really appreciate the extra level of details. Both the setup to monitor the circuit and the detailed look at the datasheet were very interesting.
Are all battery powered scopes isolated? Are your scope probe and probe ground across the capacitor? I believe I watched a video where you repaired that Scopemeter. I love your videos. They are super informative without being overly technical. Thank you.
Very nice. I appreciate your effort to demonstrate how these power bricks work. UA-cam has enough "cheap shitty" videos which always contain the same conclusions. This video is unique in showing not only a failed quality unit but how it can be characterized and repaired. Thank you.
Another great example of why having a electronic DC load is so valuable at the bench...had a cable TV box PSU do exactly the same thing when I was troubleshooting the failure. Luckily had a spare and didn't go thru the repair process but knew exactly what the situation was from having the load t the bench. Thanks for sharing, great description as usual.
You're a very good narrator, as always! Very intelligent analysis & repair. A real pleasure to watch.
Excellent description of the psu. Thanks... still not brave enough to do anything other than check and replace capacitors on switched mode psu’s but the more knowledge I get the more comfortable I will be...
Thanks for the video and for taking the extra time to explore the circuit details and take measurements. With your knowledge you probably didn't have to do all of that to figure out the problem. Look forward to next video.
I have been looking for someone who would walkthrough schematics on UA-cam and explain things like this.
Thank you so much!
Awesome repair. I have had several of these go bad in the past. I will open the next one up and see if it’s a bad cap.
very methodical and neat troubleshooting as always.
Very informative with nice measurements!
Nice explanation, thanks.
nice fix love that fluke scopemeter
Excellent tutorial...cheers.
Shure cheaped out on the capacitors, not really what I expected from such reputable brand.
I thought it was that "bootstrap" capacitor from the start, it so often is when switchers work but have weak output.
Really cheapass caps though, not even low-ESR by the looks of things.
isolation transformer for the power supply?
At least I have a good excuse for not being able to solve one 36V PS. To be fair, that one is much more complicated, with a lot of SMD transistors on the secondary side