Hi, finally got a little time to try swapping filter chips around, same issue.
I checked the trimmers, they seem okay, do I move on to wave shaper or oscillator? Is there a good way to work on these things? The socketed ICs were bad enough!
--- In yamahacs80@yahoogroups.com, Bob Stewart <bob@...> wrote:
>
> Might also be a filter chip failure causing the loss of square, saw and
> noise. Try swapping the filter chips with another card to see if the fault
> moves with the chip/s.
>
>
> On Monday, November 25, 2013, Rikard Latvala wrote:
>
> >
> >
> > Hey,
> >
> > about the light bulb, check if a well stocked gas station has them,
> > I think I've seen these 24v5w bulbs used in cars.
> >
> > If i remember correctly the squarewave output can be probed at TP4
> > on the M-card, and VR12 adjusts its output level. The trimpots used in the
> > CS 50/60/80 are in need of replacement, or atleast some adjustment
> > from time to time.
> >
> >
> > Skickat från min iPad
> >
> > 25 nov 2013 kl. 02:22 skrev "leefordwatford@...<javascript:_e({}, 'cvml', 'leefordwatford@...');>"
> > <leefordwatford@... <javascript:_e({}, 'cvml',
> > 'leefordwatford@...');>>:
> >
> >
> >
> > 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.
> >
> >
> >
>