Finaly got time to dive in this problem again.
After concluding that the basic waveforms also are not correct, I found out that there was, shame on me, en loosy(?) connector.
After reconnecting it, everything works the way it has to be, and I could finalize the calibration process.
No strange things yet :-)
Thanks for all help!
--- In PolySix@yahoogroups.com, "sigma.draconis" <mreuvekamp@...> wrote:
>
> 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
> > >
> > >
> > >
> > >
> >
>