Vintage Synth Repair

Sounds like the same issue that Kurzweil K2000's have
where the J109 FET's (to stop turn-on thump) fail if a
lead with stray earth voltages is plugged in.


--- narfman96 <narfman96@...> wrote:

> Look for J111 FET's (or similar) near the output
> jacks. They are used 
> for output muting and are a common failure item.
> 
> I would like to see a schematic for the MR Rack too
> since I have one. 
> I'm looking for the V1.53 eprom images too. 
> 
> --- In vintagesynthrepair@yahoogroups.com, "Merlin
> Zener" 
> <merlin.zener@...> wrote:
> >
> > G'day Steve,
> > 
> > I'm in Darwin.
> > Would you have, or happen to know where to get, a
> circuit diagram 
> for
> > an Ensoniq MR rack?
> > Even if it was just the analog bit around the
> output sockets,
> > headphone socket etc. I've got one
> > that only puts sound out the headphone skt, not
> the main or aux 
> outs.
> > 
> > Cheers,
> > --
> > Merlin.
> > 
> > 
> > 
> > 
> > 
> > On Tue, Apr 15, 2008 at 9:54 PM, thirteentech
> <thirteentech@...> 
> wrote:
> > > Just wanted to introduce myself... I am a
> synthesizer service 
> tech from Sydney, Australia. I
> > >  have been fixing synths since 1982, as well as
> a lot of touring 
> as a keyboard tech. Currently I
> > >  have around 22 vintage machines that I play and
> use for 
> recording, and have been a warranty
> > >  tech in Australia over the years for PPG,
> Kurzweil E-mu and 
> Sequential. Hope I can help out a
> > >  little on the forum, and learn some new things
> too :-)
> > >
> > >  Steve Jones.
> > >
> > >
> > >  ------------------------------------
> > >
> > >  Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > 
> > 
> > 
> > -- 
> > Merlin Zener
> > piano, synthesizer.
> >
> 
> 
> 



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