In the schematic I have (OD-2R), the Turbo switch is connected to a 10K resistor (R80 in the schematic), and the resistor is connected to a 0,1uF cap (C40 in the schematic). The remote jack is connected exactly like the switch: ring to ground, tip to a 10K resistor, and the resistor is connected to the same 0,1uF cap. I don't know if the schematic is correct. If anybody wants it, let me know. By the way, I don't have the schematic for OD-2 to see if they're the same units.