Vintage Synth Repair

> 
> So does anyone know which of the 8 traces on the switch PCB can be
> bridged to bypass the switch?

This is relatively easy to figure out with an multimeter. With the
instrument unplugged (no power), just test the resistance between
points on the switch while it's in the ON position. Wherever you get 0
Ohm means those two points are connected when the unit is ON. Just
solder a wire between those and you'll bypass the switch. You can also
do the same probing with the unit OFF, which will help you understand
what's changing between ON and OFF states, and thus figure our the
switch's inner logic.

J.F.