Vintage Synth Repair

Hello,
I bought a second hand poly800II and some time after playing it I noticed 
that its frequency values are out of defaults.
I believe that the guy i bought has changed the values on the board inside 
(VR2, VR3, VR4 VR5)
First it was detuned and i had to make some changes inside, in the green 
board to make it get on tune, but cutoff, resonance seem to be
Is there any way i can calibrate it again???

thanks
italo
italo@...

Do you mean that the parameter values might say "3" when there should 
only be 0-2? If that's what you mean, the values stay in the proper 
realm after you edit them back. At least they did on mine.

BTW, does anyone have any extra black keys for a Poly 800? Or an 
octopus strip in good condition?

-Mike Walters
www.mysterycircuits.com