The four tuning knobs on the back of the MG-1

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1

My MG-1’s osciallators are somewhat out of tune (the main tuning knob is way off center, and the poly tuning knob is nowhere near it). I understand that the four holes in the back contain pots that can be used to tune the osciallators and keyboard. Does anyone know which is which?

Dave

2

i have the service manual, i’ll check when i get home