Nice fix!
Make sure you have a copy of that EEPROM data in case you need to reprogram it again!
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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If you want a really basic and cheap ESR meter, there are analogue designs such as [url]https://ve7it.cowlug.org/esrmeter.html[/url] or [url]https://danyk.cz/esr_en.html[/url] (and many more examples online).
However, I suspect the AVR based Transistor Tester devices wouldn't cost much more, and they give you a lot more functionality.
I also like that a lot of them are based on the open source design and can be repaired easily, since you have schematics and source code.
I have a "Blue ESR" meter designed by Bob Parker (actually I have two - I inherited...
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Congratulations!
You will get better solder joints on that IC if you wick the old solder off the pads after removing the old chip. If the pads are all flat, the IC will sit flat on the board as it's supposed to, and you can solder the new one much easier. Some good liquid flux helps a lot, too....
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SMD ceramics are rather delicate, they can be damaged if you solder them wrong and thermally or physically shock them, it's possible to disturb the short internally or crack the capacitor by desoldering it, especially if done with a soldering iron rather than hot air. Then the short would appear to vanish.
I've also had disappearing short circuits on tactile buttons, once the part is desoldered. My guess would be tin whiskers internally on the switch contacts that melted, or similar....
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Re: psu ac240as-01 dell Optiplex 7010 pc tower
Were those blown capacitors, C6 and C10, part of the snubber network for the FET? Did you get correct values for replacement? Are there any other components in the snubber network? If any parts are open circuit in that area you would get problems.
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Re: Denon AVR-X2000 no audio
Depends what the fuses protect. Are they in the power supply? Or do they protect the speaker outputs? Or what? Hard to tell from the photo.
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Re: SONOS Play 1 no power burnt out component
Check your main filter capacitor too. If it's bad, that could be why the MOSFET blew to begin with. The MOSFET snubber network is also suspect.
I would also check diodes etc around the FAN6751, some may be shorted from the same voltage spike that blew it.
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Re: Allen & Heath Xone:92 (DJ mixer) no output on main out & magic smoke
It does look like only those op-amps are powered through those resistors, so aside from C58/C60 (which would both have to go shorted at the same time, and is unlikely) it is most likely one of the opamps that shorted.
It's possible you can't find a short because the opamp that shorted blew open circuit due to the fault current.
You could try one of two things - replace the resistors and power up. If the opamp is now open circuit, then trace the audio through all of the ones...
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Re: Trying to renew my old computer
That's why you have to strip it down to bare minimum parts before looking at BIOS etc.
Other bad devices always have the chance to cause problems.
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Re: Sacon FZ revival experiment
Sacon FZ are so crap, they probably use fake cat piss....
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Re: never trust samsung
I never wanted a smart TV and now I want one even less.
It's fine, you can get regular TVs for free when other people "upgrade" haha
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Re: recap help AcBel PSU
Nothing so wrong with using recycled capacitors IF you remember you don't know how much longer they're going to last. You might have to replace them again in 6 months- if you're okay with that.
Brand new is the best.
Don't use old components for repairs on someone else's devices unless you have no choice.
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