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> Strange Fluid (broken) Pcb, Faulty PCB on Harman Kardon Sb15 Soundba
poldapaq
Posted: February 01, 2016 11:53 pm
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Hi there.
I got no sound from my HK Sb15 Soundbar.
Took out the small pcb to look for errors:
At first I found a brown fluid on the board, on different places but most around the Capacitors.
Some of them are bulbed on the top and broken I guess but the brown fluid are also around those who looks okay, flat top.

Added pics to my homepage: My Webpage

First time here so thanks for your patience and understanding and thanks for your help.

Best Regards Espen wink.gif
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kellys_eye
Posted: February 02, 2016 12:29 am
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Poor quality capacitors that have 'blown' under duress.

They will all require replacement.


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gremlinsa
Posted: February 02, 2016 07:26 am
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Some of that 'Brown stuff' on the board is the glue used to prevent the caps from vibrating..however any caps that are even slightly bulged need replacement...

Most times it's also better to put same value caps from the next up voltage range.. IE. replace 220uf 16V with a 220uF 25V..

This generally reduces the heating of the caps, and reduces the chance of catastrophic release of the magic smoke...


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poldapaq
Posted: February 02, 2016 10:48 am
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Okay thanks for the help guys ☺
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GPG
Posted: February 03, 2016 05:43 am
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I have seen that brown stuff become slightly conductive Also use 105 deg caps
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