[sdiy] ARP omni-2 repair

[Gonzos Doom]

good evening to everybody from the list,
i got an ARP OMNI-2 string synthesizer today, witch has big keyboard
tracking problems. Only one key is working properly, but pushing
further ones they will work somehow but with a wrong frequency.
is there somebody with some experience in working on such an instrument,
since i only have worked on monophones.
Is there any scematics available???

would be nice if i could ge this "tinbox" working,

greetings
daniel