> Hi Florian. I did try to adjust the VCO disconnected from the
> A-190-2, by trying to make octave jumps from Range 0 to +1, +2
> and -1. I've adjusted potentiometer P6 that the VCO Range 0 would
> sound the same note as a C1 from my keyboard. I've tried to make
> the octave jumps turning the P7 and P5 potentiometers. It's like
> I have a shorter scale, since I have a C note at Range 0 and a B
> note at Range +1.
>
> Altough I'm noting right now that a chart from the "VCO-Offset
> and Range adjustement procedures" at service manual tells that C2
> would give me a lower octave and so on. Wouldn't it give a higher octave
>
> Sidney

To adjust the A-110 you need a precise 1V/Oct control voltage , e.g. an
exactly to 1.00V/oct adjusted Midi-to-CV interface like A-190-1 or A-190-2.
Otherwise you will not be able to adjust the A-110 in the right way. Rather
you may destroy the possibly correct adjustment of the A-110 ! You have to
follow the instructions given in the service manual and pay attention to the
adjustment sequence as described in the service manual. If you do not keep
the order mentioned in the service manual you will not succeed !

Best wishes
Dieter Doepfer