Discussion about the Korg PolySix synthesizer

"dinked" around with D/A adjustment (page 19 of service manual).
when I switched the switch (SW1) from normal to test and did as the
service manual states, lights 1 and 5 where lit and some times lights
5 and 8 would flicker.  moved pots vr 6 and vr7 a bit and it started
to work again... hope this fixed my problem.

--- In PolySix@yahoogroups.com, "synthmdl76" <synthmdl76@...> wrote:
>
> 
> 
> Sorry I meant board 367 not 376
> 
> Im checking the TP voltages righ now, then im testing the RESET.  If I
> move VR1 when the cutoff is jumping that seems to effect the jumping
> 
> 
> --- In PolySix@yahoogroups.com, "synthmdl76" <synthmdl76@> wrote:
> >
> > Update, 
> > Ive narrowed it down to the VCF section of parameters.  
> > 
> > I disconnected connector 1 (on board 376)
> > This disabled the VCF and EG params. (As i can still mod. all other
> > params.)
> > Now when I change the prog with the bank selector I can play the
> > selected sound and it remains ok.  then when I plug connector 1 back
> > in, thats when I get the random jumps in the VCF
> > 
> > I just plugged connector 1 back into the 376 board and the cutoff was
> > jumping again.  
> > 
> > if I mess with the cutoff I can get it back working.  so Im thinking
> > something on the board that the cutoff knob is on is acting up. 
> > unless the 376 is sending the cutoff jumpy signals.
> > 
> > there's a Ghost in the Machine Roxanne!
> >
>