Yeah, "strange" is my middle name. Re-checked the traces several
times & found nothing out of order; might try severing all suspect
traces at both ends & hardwiring (as a last resort).
Also want to look at the 4066 switch again (IC 1) -- will spend a few
hours on it this weekend & let you know how it comes out
(so many synths to repair, and so little time!)
Thanks for your suggestions.
~G
--- In PolySix@yahoogroups.com, The Old Crow <oldcrow@o...> wrote:
>
> That is certianly strange. The only thing I can note is the
trace for
> the pitch modulation to CN06-2 does run right through the splash
damage
> area of the original battery, so perhaps the trace got shorted or
opened
> and is picking up noise from another part of the circuit. Another
guess:
> replace C43, which decouples noise on the pitch mod line from CN06-
2.
>
> Crow
> /∗∗/
>
> On Wed, 3 Sep 2003, cavernosum6 wrote:
>
> > Hi -
> > thanks; had a few minutes last night -- disconnected the wheels
from
> > the front panel (no help); disconnected CN06 - 2 (no help);
> > disconnected R9 that feeds the CV mixer IC 8 : problem vanished.
> >
> > Didn't have any more time (dealing with a dead Prophet 5 power
> > supply), but it's aroused my curiosity: why would pulling R9 do
the
> > job, when pulling CN06-2 had no effect? -- according to the
> > schematic, it would be basically the same thing.
> >
> > Hope to have more time tonight; meanwhile, any further thoughts
> > would be appreciated.