Icom IC-R20 User Manual download pdf (Page 25)

OPTIONAL UNIT INSTALLATION

■ Scrambler unit installation

The following PC board modiﬁcation is required when installing the

optional UT-109 or UT-110.

q Rotate [VOL] to turn the power OFF, and remove the battery

pack. (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 RX

AF 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] to

turn the power ON.

NOTE: When uninstalling the

scrambler unit

Be sure to re-solder the discon-

nected points at left, otherwise no

TX modulation or AF output is

available.

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Icom IC-R20 User Manual Page 25