Yamaha CS80

So I checked voltages at the KAS board, the 3rd voice board seems to be getting the same voltage/drop as all the others...so I should be able to rule that out, right? 


I've swapped a few of the VCAs around, and still have the same issue.



--- In yamahacs80@yahoogroups.com, "leefordwatford@..." <leefordwatford@...> wrote:
>
> Sorry for all of the posts...
> 
> I traced signal all the way to CP3, right before the VCA (IC4). I get only sine at CP4. I checked the trimmer for that VCA, it's had an odd reading, so I'm going to attempt swapping it out. 
> 
> --- In yamahacs80@yahoogroups.com, "leefordwatford@" <leefordwatford@> wrote:
> >
> > Hi, thanks for the group, lots of good info!
> > 
> > I recently acquired a CS60, that mostly works pretty well. 
> > 
> > The first, and easiest issue is to find out a modern replacement for the Touch Response light bulb. I'm having some trouble finding a 24v5w equivalent. The #1864 seems close, but is 28v, and I'm not even sure it is the correct base size. 
> > 
> > 
> > The only other issue I've found (other than the need for a good tuning touch-up) is that the 3rd voice does not pass Square, Saw, or Noise. The Sine wave works great, and all other cards work fully. 
> > 
> > Where can I start? I've read a few posts here about it possibly being the Wave Shaper or maybe the VCF or VCF master level?
> > 
> > Thanks!
> > lee.
> >
>