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Old 17th June 2007, 09:07 AM   #1
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Default Anyone know this KEF part?

I borrowed a friends KEF PSW2000 subwoofer to find out why it powered on (green light) but produced no sound.

I'm not sure what the U8 chip is, as it seems to have been obliterated after the green cap vomited all over it!

Can anyone tell me what 224K means on the capacitor?
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File Type: jpg cap.jpg (87.0 KB, 140 views)
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Old 17th June 2007, 09:10 AM   #2
big jim is offline big jim  England
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220n

jim
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Old 17th June 2007, 09:13 AM   #3
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Cool, because that's the right size for the cap. Any idea where the K comes from, or is that one of those "lost in time" things like mF for microfarad (and MF for Milifarad) in the US?
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Old 17th June 2007, 09:43 AM   #4
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K=10% tolerance
J=5% tolerance
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Old 17th June 2007, 10:00 AM   #5
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This site has a usefull Calculator
Electronics 2000

Though this site I find more usefull, cause I can never remember the scientific notation. Fortunately my GF is a sciency type. She can do the conversions in her head

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Old 17th June 2007, 10:19 AM   #6
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These subs had a problem with the speaker relay failing.

IIRC it is blue with a silly name like "Lucky Sky".
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Old 17th June 2007, 10:18 PM   #7
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Quote:
Originally posted by stoolpigeon
These subs had a problem with the speaker relay failing.

IIRC it is blue with a silly name like "Lucky Sky".
Well, from the picture (in post #1), it looks like the cap may be to blame. I won't be fixing it, I was just looking for the problem. Now that I've found it I'll let him decide what to do with it...
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