That’s what the coarse tune (center note) does already, though, so you could debug things the other way around – measure the voltage at pin 15 at the potentiometer output, on the potentiometer side of the 100k, and tweak the center frequency trimmer to see if it changes.
If you cannot get a tone out of the chip with the available knobs/trimmers (there’s three of them on board that feeds directly into the CV input, before you even plug anything in), something’s broken. See here for suggested trimming order.
EDIT: Pin 15 is a summing node that’s held at 0 V by the input stage, so the input voltages are on the opposite side of the 100k resistors.