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.
>
>
>
>
>
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