Forum: Troubleshooting Power Supplies and Power Supply Design
02-14-2021, 07:37 AM
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Replies: 1,725
Views: 467,171
Another Supernight
Another day, another Supernight!
This one is also popped - blown fuse, shorted primary FET, and blown caps (see below). The case was slightly melted, but I didn't bother photographing it as it's...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-05-2021, 09:18 PM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-17-2021, 09:44 PM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-16-2021, 08:26 PM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-16-2021, 04:10 PM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-16-2021, 03:23 PM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-16-2021, 02:16 PM
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Replies: 1,725
Views: 467,171
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Forum: General Capacitor Questions & Issues
07-03-2019, 07:51 PM
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Replies: 1,015
Views: 523,463
Re: The Hall of Shame - Badcaps Photo Montage
Take a look at how wide open the vent is. I'd say it suffered a sudden, violent failure.
That's not the first time I've heard of big filter caps going in a NAD amp..
Look closely at the big...
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-10-2018, 07:32 AM
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Replies: 1,725
Views: 467,171
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Forum: Troubleshooting Audio Equipment
01-05-2018, 08:14 PM
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Replies: 48
Views: 5,210
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Forum: Troubleshooting Audio Equipment
01-05-2018, 07:40 PM
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Replies: 13
Views: 2,628
Re: Onkyo tx sr 607 -New DSP chip installed
SRT1, are there any other BGA chips on your board?
To me, seeing that it works after a few hours of idle time makes me think that there is a thermal issue, like a bad solder connection which...
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Forum: General Electronics Technical Discussion
01-05-2018, 07:28 PM
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Replies: 1
Views: 1,215
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Forum: Troubleshooting Power Supplies and Power Supply Design
01-05-2018, 06:37 PM
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Replies: 6
Views: 3,055
Re: ANTMINER S9 power circuit
Might very difficult if not impossible to fix due to the PIC chip. It might be read protected, or completely fried, etc..
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Forum: General Electronics Technical Discussion
01-05-2018, 06:08 PM
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Replies: 25
Views: 2,507
Re: Overvoltage protection design ideas
The simplest thing I can see doing is to connect a suitably sized power transformer across the AC input before the UPS transformer, and connect the output of the power transformer in series,...
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Forum: General Electronics Technical Discussion
01-05-2018, 05:38 PM
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Replies: 17
Views: 2,680
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Forum: General Capacitor Questions & Issues
12-15-2017, 06:21 PM
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Replies: 6
Views: 1,948
Re: Good motor capacitors for an MOT?
Just get a 10kVA or similar size distribution transformer (or two!). Much easier, plus those can handle a larger amount of power. MOTs will overheat easily if you don't ballast them.
Also keep in...
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Forum: General Capacitor Questions & Issues
12-15-2017, 06:04 PM
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Replies: 8
Views: 1,855
Re: Bad NCC SMQ 220/400 in 2006 Seasonic S12II
It's possible that the capacitor failure caused the diode to fail due to excessive ripple current or something like that.
I haven't seen it myself yet, but I've heard of rare occasions where the...
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Forum: Troubleshooting Power Supplies and Power Supply Design
09-03-2017, 11:40 PM
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Replies: 1,725
Views: 467,171
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Forum: General Capacitor Questions & Issues
09-27-2016, 10:56 AM
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Replies: 15
Views: 3,082
Re: ESR Mania
^^^ I second this, even though I don't have a proper ESR meter yet. I've gone looking around and found good/decent ones for a decent price.
Heck, if you repair lots of stuff, even spending $100 on...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-24-2016, 09:03 AM
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Replies: 48
Views: 20,927
Re: DELL OEM H240AS-00 (HIPRO) ~ major blow up!
Well the more modern CapXon capacitors have been fine in devices like PSUs and such ... it was just those from the bad cap plague era that were a problem.
Then again, yes, I still don't fully...
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-24-2016, 08:32 AM
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Replies: 3,195
Views: 1,055,736
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Forum: Troubleshooting Power Supplies and Power Supply Design
02-24-2016, 08:24 AM
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Replies: 48
Views: 20,927
Re: DELL OEM H240AS-00 (HIPRO) ~ major blow up!
Ahh, okay, thanks for the info! :D
I've since fixed the computer. Sorry for not giving an update until now...
I bought a replacement PSU. I actually opened that up (I know, tsk tsk tsk).
It is...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-14-2016, 08:34 AM
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Replies: 1,114
Views: 183,829
Re: ESR meter upgrades
Ohhhhhhhhh...... :owned:
LOL XD
I see ... hmm ...
Welp, I could do without the fet and triac testing feature for the moment I guess.
I'll have to take a look at just how it measures those, to...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-13-2016, 10:37 PM
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Replies: 1,114
Views: 183,829
Re: ESR meter upgrades
1. You can drive certain fets with 3.3V ... the FDV304P, a P-channel device, has a typical gate threshold voltage of 0.86V! Granted, it's not a power fet, but it can be used to switch other things on...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-13-2016, 07:49 PM
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Replies: 1,114
Views: 183,829
Re: ESR meter upgrades
I'm thinking ... I have two different STM32 "nucleo" dev boards, I wonder if I can translate/port this code to one of those ... I'm becoming more and more interested in building one of these :p:...
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