194OPTIONAL UNIT INSTALLATION4 Scrambler unit installationThe following PC board modification is required when installing theoptional UT-109 or UT-110.q Rotate [VOL] to turn the power OFF, and remove the batterypack. (p. 3)w Remove the unit cover as shown at left (Optional unit installation.)e Cut the pattern on the PCB at the TX mic circuit (MIC) and RXAF circuit (DISC) as shown below.r Install the scrambler unit as shown at left (Optional unit installa-tion.)t Replace the unit cover and the battery pack, then rotate [VOL] toturn the power ON.NOTE: When uninstalling thescrambler unitBe sure to re-solder the discon-nected points at left, otherwise noTX modulation or AF output isavailable.