Hi Leonard,

Actually, looks like I was wrong. I just saw a message in this newsgroup
describing the same symptoms as mine in the same subwoofer. Anyway, I opened
the sub and the schematic of actual amp is different from the one that I
have in the manual. Instead of S64 I have 3 FET transistors with thermister
sitting on large heatsink. All 3 transistors are dead (I don't know what
happened to this amp), plus one of the diodes is also dead. That's all what
I have found so far.
Is there any place where I can get repair manual for mine? On the PCB it
says "Revision C", but revisions of design in the manual have versions in
numbers, not letters.

Also, could you be more specific why that specific capacitor (C6) fails?

I went to Harmanaudio.com website today and it does not show that they have
any parts for PB12.

Eugen.



"Leonard Caillouet" wrote in message
news:31Zlb.100075$AH4.43016@lakeread06...
The only source that I know of is Harman(JBL). The S64 is currently out
of
stock, but they are expecting more. The S53 is in stock. We have many of
the Infinity subs in the field with the S53 modules and have replaced
exactly one, in a unit that was blown up by lightning. Most of the
problems
that we have seen have been C6 failures, not bad modules. What makes you
say that they die after a year of use?

If the module is bad, it is an expensive part. How have you determined
that
this is the problem?

Leonard Caillouet

"Eugen T" wrote in message
news
Hi all,

Could anyone point me in the right direction? I am looking for JBL
S64AMI
and/or S53AMI power amplifier for 12" JBL PB12 subwoofer. These amps die
after ~1 year of use and I'd be interested in finding a supplier for
them...
If not, then I'll just repair mine, but it would be nice to know if such
supplier exists. Thanks!

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