Vintage Synth Repair

Hi all,

well, I have narrowed down my search and identified and ordered the offending
parts. It is a set of Junction FETS transistors fitted to each output (6 in
total). I have ordered a set of 10 from Farnell in the uk.
I was planning to fit these myself but since there rather small parts that need
to be soldered and apart from replacing the backlight i've never done that sort
of job, I was wondering if there was somenone technical enough in the uk that
could help me? I live in west London but could travel a bit.
If not, then any advice on how to replace these transistors would be welcome.

Thanks

Laurent

----- Forwarded message from laurent <lists@...> -----
    Date: Fri,  8 Oct 2004 09:41:22 -0700
    From: laurent <lists@...>
Reply-To: laurent <lists@...>
 Subject: [vintagesynthrepair] K2000 outputs blown
      To: vintagesynthrepair@yahoogroups.com

Hello all,

I just joined this board.
I recently bought a Kurzweil K2000 and am experiencing strange problems.
This Mix outputs are very low and the Headphone outs are very high, cliping at
medium volume.
A quick search on google revealed the following:
"This was a common problem on early K2000's. Later units had a
protection board installed (also available as a low cost upgrade for
older systems). Problem, as I recall, was that static electricity or
floating ground problems could blow the output transistors when
pluggin/unplugging cables to the unit.
There is a transistor on every output that mutes the output when you first
turn on the keyboard.  Static electricity can fry these.  If you plug in an
audio cable to the K2000, THEN plug that cable into an amp, chances are you
will short the tip of the plug to the chassis of the amp.  This will destroy
the transistor.
The remedy is to replace the transistor."

I was wondering if there was any K2K owners on this list who would be familiar
with this issue and how to fix it.

Thanks in advance

Laurent

----- End forwarded message -----