Icom iF25 S instruction manual Optional unit installation, Scrambler unit installation

4 OPTIONAL UNIT INSTALLATION

■Optional unit installation

Install the optional unit as follows:

qRotate [VOL] to turn the power OFF, and remove the battery pack. (p. 3)

wRemove the unit cover.

NOTE: Use a flat head screw driver or a similar flat instru- ment, and insert into the hollow of the chassis, then lift and take away the unit cover. (The removed cover cannot be used again.)

eInstall the unit as shown below.

*This illustration is described with the UT-110.

rReplace the unit cover and the battery pack, then rotate [VOL] to turn the power ON.

NOTE: The optional UT-109/UT-110 SCRAMBLER UNITS requires some PC board modifications. Please refer to the additional in- stallation as at right.

OPTIONAL UNIT INSTALLATION 4

■Scrambler unit installation

The following PC board modification is required when installing the optional UT-109 or UT-110.

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

pack. (p. 3) 4

wRemove 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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