Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old January 18th 09, 06:33 PM posted to sci.electronics.repair
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Default paradigm subwoofer buzzing looking for advice.


Hi all! I have a paradigm subwoofer 10 inch can give you the model if
you need it that has a hum/buzz emanating from the controller board
that I am about to open and attempt to repair.No I won't do anything
crazy with it.
I was wondering if anyone had any advice or things to look for that
might be the problem for when I finally do rip it apart.
The buzz is definitely coming from the board, and not the speaker, and
is fairly minor in nature, as I didn't notice it until I was
manhandling it into a new location.
It is a similar buzz as to what you get with a badly grounded turn
table.
If you need any more info or have any questions please ask, and I will
do my best to answer.
thanks for your time.
kallita
If you really want to talk to me - just eat the spam

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Old January 19th 09, 01:59 AM posted to sci.electronics.repair
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First recorded activity by DIYBanter: Jul 2006
Posts: 6,753
Default paradigm subwoofer buzzing looking for advice.


"james moffat" wrote in message
...

Hi all! I have a paradigm subwoofer 10 inch can give you the model if
you need it that has a hum/buzz emanating from the controller board
that I am about to open and attempt to repair.No I won't do anything
crazy with it.
I was wondering if anyone had any advice or things to look for that
might be the problem for when I finally do rip it apart.
The buzz is definitely coming from the board, and not the speaker, and
is fairly minor in nature, as I didn't notice it until I was
manhandling it into a new location.
It is a similar buzz as to what you get with a badly grounded turn
table.
If you need any more info or have any questions please ask, and I will
do my best to answer.
thanks for your time.
kallita
If you really want to talk to me - just eat the spam


Are you saying that it is a sound coming from a component physically
vibrating, rather than an electronic buzz being reproduced from the speaker
? And that otherwise it all works ok ? I think that's what you're trying to
get across. If so, and it's a pretty constant sound, chances are it's a
wound component. Assuming that it uses a conventional linear supply, then it
will most likely be the line power (mains) transformer itself. Can often be
cured simply by tightening the mounting screws. Otherwise, it's a case of
stopping the laminations being able to vibrate. Various methods can be used
for that, including superglue, varnish, hot melt glue, silicone rubber etc.

Arfa




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