Little update:
My sub was made in Dec.2002 (yeah, and this expensive beast is already
dead), so service manual is old compared to the sub. JBL dropped IC-based
power amp idea and moved onto FET-based power amp... Hopefully, I will be
able to locate newer service manual now




"Leonard Caillouet" wrote in message
news:LVZlb.100128$AH4.79172@lakeread06...
Actually, checking I find that the c6 failures are not in this model.
There
are, however, several service bulletins on this unit. The site you went
to
does not have service parts, only accessories and manuals and consumer
replaceable parts. The service site has all parts listed and most should
be
available, but you have to be a servicer to have access.

Contact Harman Consumer Group at 516-496-3400. They may sell you a
service
manual. They might refer you to a service center.

Leonard Caillouet

"Eugen T" wrote in message
.. .
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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