Bose Speakers Again

Derek Pulvino dbpulvino at
Mon Dec 16 15:36:40 EST 2002

Thanks all for the response.  I was inclined not to believe what the shop
person had told me, very unhelpful and didn't listen to what I had to say at

>At 12:56 PM -0800 12/16/02, Derek Pulvino wrote:
>>-If a capacitor is bad, will it always leak fluid?
>Not always, but usually.
>The fluid dries and is rather hard to see; you have to look for an area of
>the PCB that appears to have a different sheen or appears to have a coating
>of some sort.

Looked for that, but didn't really notice anything that caught my eye

>   Damage may be hidden underneath a capacitor- look carefully for black
>areas and for solder pads to appear corroded.

Same on that, as in didn't notice anything weird.  But, as you said could
only really check one side of the board because of the components in the

>>Also, went down to a local electronic repair store, and while the
>>communication was, hmm "laborious," the technician down there thought the
>>cap's were fine.  He also checked the caps with a meter (didn't figure out
>>what it did), and said they all looked good?
>I'd love to know how he tested them in-circuit.

He put a positive and negative testing lead (similar to a multimeter, but
like I said, never figured out what he was measuring) on each side (poles)
of the capacitor on the back soldered side of the board.  Question gets me
to thinking though, can you check a component of a circuit without isolating
it from the board, ie while it's still attached.   The board was out of the
speaker and in hand when I brought it into him.

Thanks for the input.  Also, does anybody know if the circuit boards are set
up/eq'd for the right and left side of the car?

Derek P

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