Doepfer

Hello. I've noticed that my A-110 VCO can't get octave jumps when I change Range positions. 

Before that I was using a keyboard connected to a A-190-2 and noticed that it was not making a regular tonal scale. So I tried to adjust the A-110 to make an exact octave jump when I turned range knob. I read the A-110 service manual and tried adjusting the potentiometer P5 and P7 to get the Range positions make octave jumps. 

I tuned the sound coming from the A110 to a C1 from the keyboard turning potentiometer P6. With Range set at 0 I got C1. But turning Range to +1 I got a B flat, and at Range +2 I got A, and at Range -1 I got C sharp. I keep trying tried to adjust P7 and P5 potentiometers but could still not get octave jumps. Does it have relation to temperature adjust? Any help? 

Thanks,

Sidney