Vintage Synth Repair

Hi secretcircuit,

thanks for your reply, i will do so next weekend and then get back to you.

best regards moe




--- In vintagesynthrepair@yahoogroups.com, Dennis Matana <connect2techno@...> wrote:
>
> check your bridge rectifiers in the power supply...if these get to hot the
> synth can freeze. Had a similar problem with a dx7 and a dj set. Swapped
> the BR for ones with higher values and the problem disappearred.
> 
> 
> 2013/6/10 Royce <rpcfender@...>
> 
> > **
> >
> >
> > Hi Moe
> > have you tried the diagnostics?
> >
> > Press and hold VOICE
> > Press and hold BANK D
> > Press 8
> >
> > All the best
> > Royce
> >
> > --- In vintagesynthrepair@yahoogroups.com, "m.sislack" <m.sislack@>
> > wrote:
> > >
> > > Hi Paul,
> > >
> > > thanks for your quick reply. The CR2032 has already been changed, all
> > parts, boards, ics and cables i have dis- and then reassembled and
> > reseated, I also replaced all of the electrolytc capacitors on the
> > mainboard, but the problem still persists...
> > >
> > > regards moe
> > >
> > > --- In vintagesynthrepair@yahoogroups.com, Paul Krull <paul.krull@>
> > wrote:
> > > >
> > > > Â You may need to replace the CR2032 batteries and reinitialize the
> > SY77. A cable or chip could be unseated too.
> > > > Â  Â Thanks
> > > >
> > > >
> > > > ________________________________
> > > > From: m.sislack <m.sislack@>
> > > > To: vintagesynthrepair@yahoogroups.com
> > > > Sent: Sunday, June 9, 2013 8:27 AM
> > > > Subject: [vintagesynthrepair] YAMAHA SY77 freezes
> > > >
> > > >
> > > >
> > > > Â
> > > > Hello everybody,
> > > >
> > > > I´m trying to repair an SY77, that when I got it was stuck in
> > untility-mode. It freezes when one of the "mode"-buttons is pressed, so I
> > cannot even enter the test-mode. Furthermore the wheels dont´t have any
> > effect on the sound, but send midi-data. Anyone who experienced an similar
> > problem or could provide any suggestions?
> > > >
> > > > best regards
> > > >
> > > > moe
> > > >
> > >
> >
> >  
> >
>