Q5 and Q6 are fine. I swapped out IC35 but the voice still doesn't sound when the VCA is set to EG mode. When set to gate mode, it sounds slightly lower in volume than the other voices and is a little flat. I'm stumped. I've also looked for a cracked solder joints to no avail.
--- In PolySix@yahoogroups.com, Andrew Jury <andy@...> wrote:
>
> Check the none of the transistor have leaky junctions, but failing that swap
> IC35!
>
>
> On 07/02/2010 21:02, "Alexis V. Rogers" <alexis.v.rogers@...> wrote:
>
> >
> >
> >
> >
> >
> > The LED does light on that voice. I checked voltages on IC35 and Q5 as you
> > suggested and found two discrepencies with the other working voices. I'm
> > measuring -1.495V on pin 1 of IC35 on the problematic voice, where I get
> > -0.02ish on pin 1 on the working voices. Also, I'm getting -1.2V on the base
> > of Q5 where I'm getting around -0.02V on the bases of Q5 on every other voice.
> >
> > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , Andrew
> > Jury <andy@> wrote:
> >> >
> >> > Hi,
> >> >
> >> > When you switch to EG mode does this non-sounding voice still light the
> >> LED?
> >> > As a generic answer, you might want to perform some comparative
> >> measurements
> >> > around bi-lateral switch IC35 and around emitter follower stage Q5 with the
> >> > other working voices. My guess is that there is a problem somewhere in this
> >> > vicinity.
> >> >
> >> > Good luck and don¹t forget to tell us how you get on.
> >> >
> >> > Cheers,
> >> > Andy
> >> >
> >> >
> >
> >
> >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>