[V8] v8q Bose Speaker repair

[dsaad at icehouse.net]

Electrolytic caps are cylindrical with a metal case and usually a plastic cover.
They are usually polarized - meaning there is a + and - terminal.

Tantalum caps look like a blob of epoxy and are usually yellow or orange but
probably green and other colors too. They are polarized and usually have the
minus terminal marked. Mine was yellow and located next to one of the round
coils of wire.

Both of these cap styles usually have a value of more than 1 micro farad.

Other caps styles are ceramic disk, which come in lots of shapes and sizes and
are often epoxy coated but they will have a regular shape like a disk or
rectangle. They look quite different from the tantalum blob.

Then there is the mylar wrapped. I think there were lots of these in the amp.
They often look like foil wrapped around a core and can be round or sort of like
a squished cylinder. There will not be a metal case on this type.


The electrolytics and tantalums are most likely to fail. The other types almost
never fail. If you plan to just shotgun replace parts, I would not bother with
the mylar caps.

Dave


Quoting Tony and Lillie <tonyandlillie1 at earthlink.net>:

> Subject: Re: [V8] v8q Bose Speaker repair
>
>
> > If you are handy with a soldering iron, and these directions make sense to
> > you then:
> >
> > There is one small tantalum capacitor in the amp. Replace it. If that
> > cures the problem then you are probably good to go. If the two biggest
> > electrolytic caps show signs of leaking, replace them too. You have to be
> > careful to get the correct physical size as well as correct electrical
> > ratings. In my case - which sounds just like yours, the problem was the
> > tantalum cap only.
> >
> > If you just want to buy a factory rebuild, I believe someone just got them
> > for around $70 each - and they came with a lifetime warranty.
> >
> > ... only 70K miles on a '91? has the timing belt been replaced?
> >
>
>
> Dave,
>
> I tried to send this direct, but it didn't work.
> I'm looking on one in front of me. Where is the tantalum cap, and what is it
> (what is it made of-what is different about it? ).
>
> Tony Hoffman
>
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