Remove the back cover of the transmitter and disconnect the battery.
By an Allen (Hex) key, unscrew the potentiometer knob and then remove the entire potentiometer from the transmitter.
Disconnect the FCC cable from the potentiometer (ideally by a flat tweezer) and connect it to your new switch. Please check the orientation of the blue side on the FCC cable, it have to be in the correct position.
Put the new switch into the transmitter and fasten it by the nut. We recommend using the original key to tighten the nut. Then connect the Li-Ion battery and replace the back cover of the transmitter. Don't forget to check the date and time settings in the transmitter, they have been "reset" by disconnecting the battery (menu/system/configuration).
