1. Unplug the DC power cable from the radio
2. Remove the top cover (see instruction manual page 23)
3. Remove or cut the BROWN jumper wire on the display unit. See Drawing
4. Reconnect the power cable and turn the radio on
5. Set the VFO dial to 12.3456 MHz
6. Turn power off and then back on again.
7. Turn power off and reassemble radio, (don't pinch any wires)