Vintage Synth Repair

Thanks for the advice,

However, it appears that this EG behavior is a feature -
Rise up the Initial Level pot of each oscillator and they will play
without using the keyboard...




--- In vintagesynthrepair@yahoogroups.com, "Erik Forsling"
<erik.forsling@...> wrote:
>
> I meant shorting the tip and the ring. The ring should be ground, and 
> the tip should be something like the base of a pnp-transistor. I 
> don't have the schematics at hand, so I can't check.
> 
> But it seems I was wrong. Sorry. I just tried on my CS-15, and it 
> doesn't work. That's strange, because I know I've used a double pedal 
> from a diathermy machine (sic!) to trigger the envelopes. But that 
> was a long time ago...
> 
> /Erik
> 
> --- In vintagesynthrepair@yahoogroups.com, "gil_we" <gil_we@> 
> wrote:
> >
> > Thanks,
> > 
> > but what do you mean by "short the input" ? and what should I hear
> > once I do that ?
> > 
> > Do you mean like shorting the input with ground ?....
> > 
> > 
> > 
> > 
> > --- In vintagesynthrepair@yahoogroups.com, "Erik Forsling"
> > <erik.forsling@> wrote:
> > >
> > > Actually, zero volts shoud be ok, so you just need to short the 
> > > input. Use a switching pedal (like a sustain pedal), or just hook 
> up 
> > > a cable and short the poles.
> > > 
> > > /Erik Forsling
> > > 
> > > --- In vintagesynthrepair@yahoogroups.com, "Miguel Mendoza" 
> > > <miguel@> wrote:
> > > >
> > > > You'll need a midi-CV converter or any other synth or module 
> that 
> > > could send a voltage. At this moment I don't remember exactly but 
> I 
> > > think that the pulse has to be negative.
> > > > 
> > > > 
> > > > 
> > > >   ----- Original Message ----- 
> > > >   From: gil_we 
> > > >   To: vintagesynthrepair@yahoogroups.com 
> > > >   Sent: Monday, August 04, 2008 10:36 AM
> > > >   Subject: [vintagesynthrepair] Re: Yamaha CS-15: no 
> envelopes....
> > > > 
> > > > 
> > > >   Thanks guy,
> > > > 
> > > >   no I haven't tried to fire with external gate - how will you 
> do 
> > > that ?
> > > > 
> > > >   I'll certainly check voltages asap and report !
> > > > 
> > > >
> > >
> >
>