My Poly-61M has some serious battery corrosion issues on the main board (KLM-509A) and is currently out of commission until I repair that, but since I've already got it town apart, I can look at the analog board and tell you it's got several trim pots for each voice labeled: VCA ADJ, EG ADJ, FC ADJ, and RES ADJ. Unfortunately these are not responsible for adjusting the pitch.
It also is a good time to point out that the Poly-61 has DCOs, which implies that the tuning is digitally controlled, and probably compensated as well. This was a "feature" after a decade of completely analog synths that wouldn't stay intoned. So overall, I don't think they really intended for the oscillators to be trimmed.
I expect that your tuning problems might originate from some bad components -- resistors and/or capacitors which may have been faulty. It may be possible to inspect them closer to see if they are leaking, and you can use a multimeter to check the resistors while the power is off.
Check out my Poly-61 photos in the Photos section if anyone else wants a closer look! -pc
--- In DW8000@yahoogroups.com, "crustypaul" <crustypaul@...> wrote:
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> I don't suppose anyone here knows how to retune the individual voices on a Poly61 do they?
>
> Each of the 6 voices on my poly61 are slightly out of tune with each other which makes playing anything useful impossible as every note is tuned differently to the previous one. There are trimmers on the board for each voice but they are only for VCA, EG, FC (cutoff) and Resonance.
>
> I can't believe there wouldn't be some method of retuning the voices to each other, unless of course its just so old that components have started to fail at different rates.