Vintage Synth Repair

Brilliant.
Thanks, I'll test those asap.

Great group.
Fin

----- Original Message ----- 
From: christopher_s_rider <oldcrow@...>
To: <vintagesynthrepair@yahoogroups.com>
Sent: Tuesday, February 19, 2002 8:32 PM
Subject: [vintagesynthrepair] Re: Yamaha CS-60 voice board,


>   Hm, never knew this group existed til now.  In any case:
> 
>   The CS-50/60/80 'M' (master) voice boards are nearly identical 
> among the 3 instruments.  If you look at:
> 
> http://www.cs80.com/docs/schem/cs80_circ5.jpg
> 
>   You can see the two FET switches that gate the saw and pulse 
> waveforms to the filters.  My bet is the saw switch-FET died, or its 
> control transistor died.
> 
> Crow
> http://www.cs80.com/
> /**/
> 
> --- In vintagesynthrepair@y..., "Fin" <fin@w...> wrote:
> 
> > I have one faulty voice card in a CS-60.
> > The sawtooth waveform is not present at the output, the pulse wave 
> >is. I know that the Yamaha chip producing both the waveforms is fine.
> > 
> > Does anybody have a scan for the schematics of the CS-60 voice 
> >cards?
> 
> 
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