Vintage Synth Explorer Forums

By opening my Moog Prodigy, I adjusted tuning of keyboard scale. The instrument has always been out of tune, but finally it's now in tune.
I did the tuning by ear, using no electronic equipment (I don't have any). I wasn't sure the whole time what I was doing.

It worked out fine - BUT now I found out that the pitch wheel suddenly only turns the notes 8 semitones up and down (it used to be 12 semitones before I did the scale tuning).
Did I touch something that I shouldn't have touched? In the image I show which pots I know has been turned to get the tuning right.

Where in the belly of the Moog do I find the right parts to turn, in order to get the pitch wheel back to normal?

Do you have a copy of the service manual?
I'm sure this stuff should be documented in there, somewhere...

Note: on my (late model) Prodigy, which was in tune, the pitch wheel never gave a full perfect octave - I don't think it was ever intended to, to be honest, and this is the same I believe on other Moog's like the Mini etc...

The strange thing is that the sudden decrease in pitch range is not affected by the pots that was used to tune the scale.

I have two manuals called Moog Prodigy Technical Service Manual (only the few pages that explains the alignment of scale/tuning) and Moog Prodigy - Owner's Manual. But I couldn't find the answers there.