Discussion about the Korg PolySix synthesizer

When I want to make a photo off the waveform, I found out that some parts aren't working correct anymore.

So indeed the "clean" waveforms are not as they used to be.
PW/PWM doesn't work correct and the SUB-OSC isn't doing anyhing.
TRI isn't stable to.

Because it worked before I didn't payed attention to it, and was focused on the filters.

Have to dive in this first before I can continue.
Hope I have time for it this week.

Thanks for helping so far :-)

--- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@...> wrote:
>
> 1. Is it the same wioth all six voices that you cannot adjust for the
>     requested value?
> 2. Can you post a picture of the oscilloscope screen?
> 3. I would not worry too much about minor, very well audible,
>     differences. This is the filter and not on oscillator...
> 
> Johannes
> 
> 
> sigma.draconis wrote:
> > Hi,
> >
> > Im having problems to calibrate the filter section on the KLM366 board.
> > I followed the procedure from the servicemanual, and everything went well until:
> > Page 19
> > (3) VCF RESONANCE adjustment.
> >
> > I followed instructions,
> > CN05-7 is at 0,02V
> > CN05-11 is at 8,00V.
> >
> > Next the manual says:
> > 1) Connect the oscilloscope and freqcounter with TP1
> > 2) Play any single key and try to adjust VR6 so that the VCF waveform amplitude is 300mVp-p +/- 20mV
> >
> > And here is the point I don't get it.
> > When I measure with my scope on TP1, the signal differs from every voice and key.
> > I can turn VR6, but I found out that when changing VR8, they interact with eachother.
> > So what is the starting situation?
> >
> > Maybe I missing something completely, but I hope someone can put me in the right direction.
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>