5 ms·
FTA: > it was clear what the problem was with a swollen C812 capacitor. > So no need to check anything with a multimeter or an oscilloscope, a visual inspect
by wiz21c 5y ago
FTA:
> it was clear what the problem was with a swollen C812 capacitor.
> So no need to check anything with a multimeter or an oscilloscope, a visual inspection of the board could immediately detect the issue.
I'm looking at the picture. I'm not in electronics and I can assure you it's absolutely not clear to me that this is the capacitor I'm looking for. So what should it look like ? I understand these things sometimes burn or swell but is it always visible ? And if not, what should I do to detect it ?
- gbil 5y agoI'm an electronic engineer by education and have worked with boards many times as a hobby only though (outside of the university) and I can tell you I do see the capacitor being swollen just from the picture, you can see the ones below are in a normal state. Many times this is very very obvious but other times not in which case you need to remove each capacitor and measure its capacitance with the relevant (cheap) equipment
- opheliate 5y agoAs I understand it, as someone who is also not in electronics, the cross at the top of the other capacitors you can see is designed as a pressure release, it’s a deliberate weakness in the structure of the capacitor so that if it fails, that’s where it will burst. So it’s very likely that if a cap fails, that’s where any swelling will be visible. You can see the cross is distorted/swollen on the failed cap.
- tyingq 5y agoSounds like trolling (it's not), but some electrolytic capacitors have a fishy smell when they've leaked.