Discussion about the Korg PolySix synthesizer

Actually these two things are not working:

1. The Filter controls: Cutoff, Resonance, etc...
2. The LFO section

Yash

--- In PolySix@yahoogroups.com, "7yash" <josh.nursing@...> wrote:
>
> AFter some parts came from Newark, I did the following:
> 
> 1. Mounted a socket and replaced two 74LS08N chips
> 2. Installed two LM13700N chips in place of the LM13600 chips
> 
> Results:
> 
> FIXED: - All Bank LEDs as well as 1, 2, 3, 4 remain ON.
> FIXED: - Found stays ON
> FIXED: - Sub-osc does not seem to work
> FIXED: - Octave button does not seem to work
> 
> That's very encouraging!
> 
> VAC Mode works!
> VCA Attenuator works!
> Effects work!
> VCO Waveform works!
> 
> What is not working:
> LFO: LED stays on and cannot change the frequency.
> 
> Let me know what you think.
> 
> Thanks a lot, and have a great week-end.
> 
> Yash
> 
> 
> --- In PolySix@yahoogroups.com, Malte Rogacki <gacki@> wrote:
> >
> > At 13:43 Uhr +0000 08.10.2012, 7yash wrote:
> > 
> > > What does not work:
> > >
> > > - All Bank LEDs as well as 1, 2, 3, 4 remain ON.
> > > - Found stays ON
> > > - LFO appears to always act upon the pitch
> > > - Voice 5 seems dead. A swap of both SSM chips on that segment did not
> > >change a thing
> > > - Sub-osc does not seem to work
> > > - Octave button does not seem to work
> > 
> > This has probably something to do with data lines D01 to D03 which in turn
> > points at IC31 as the most likely culprit.
> > 
> > Please check if the the following also are affected:
> > 
> > - VCA Mode
> > - VCA Attenuator
> > - VCO Waveform
> > 
> > The dead voice 5 is unrelated; we can debug this at a later point.
> >
>