Re: Sony Wireless Headphones MDR-RF820
Well, it's wasn't for nothing. Without having the proper test equipment, there was simply no way to know if they were the problem or not.
On that note, just because your multimeter shows they have good capacitance doesn't mean their ESR is good. And when the ESR is too high, the cap is as good as dead. So keep that in mind when testing caps, as I have a glass full of small caps that read "good" capacitance but terrible ESR. Most of them were startup caps that came from "dead" power supplies . Needless to say, these caps were the problem for with those power supplies. So don't rely on the capacitance reading alone.
That said, your caps were probably good. But gain, there was just no way to know without eliminating them first.
I'll have to have a look again at what I wrote, as I've forgotten most of my ideas. Might take me a few days or more as I have some things to do tomorrow and next week.
Originally posted by UserXP
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While playing with the multimeter, I checked the removed caps from the PCB board, the Lelons and Sam Youngs... And according to the multimeter, their capacitance was almost identical to the rated values. So maybe nothing was wrong with them to begin with and I replaced those for nothing. 
On that note, just because your multimeter shows they have good capacitance doesn't mean their ESR is good. And when the ESR is too high, the cap is as good as dead. So keep that in mind when testing caps, as I have a glass full of small caps that read "good" capacitance but terrible ESR. Most of them were startup caps that came from "dead" power supplies . Needless to say, these caps were the problem for with those power supplies. So don't rely on the capacitance reading alone.
That said, your caps were probably good. But gain, there was just no way to know without eliminating them first.
Originally posted by UserXP
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I haven't been in for a while, a bunch of stuff came out to be concluded.
Anyway, I recently got an AN8008 multimeter, it has the required measurement capability with auto mode. So now we can test that signal, you'll just have to direct me on what to do exactly.
Anyway, I recently got an AN8008 multimeter, it has the required measurement capability with auto mode. So now we can test that signal, you'll just have to direct me on what to do exactly.
. These series had problems between year 2001 through 2004 (and early 2005, too). The high capacitance you see is a result of high internal (current) leakage in the cap (i.e. a lot of charge is jumping between the positive and negative cap foil layers).
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