ICOM IC-F621-2 Manuale Utente

17

4

CONNECTION AND MAINTENANCE

■

The optional UT-105 and UT-108 units install as follows:

q

Turn power OFF, then disconnect the DC power cable.

w

Unscrew the 4 screws, then remove the bottom cover.

e

Install the unit as shown in the diagram below.

r

Replace the bottom cover and screws, then the DC power
cable.

■

q

Turn power OFF, then disconnect the DC power cable.

w

Unscrew the 4 screws, then remove the bottom cover.

e

Cut the print pattern on the PCB at the TX mic circuit (A)
and RX AF circuit (B) as shown in the following figure.

r

Install the scrambler unit as shown in the left.

t

Return the bottom cover and screws to the original posi-
tion.

NOTE: Be sure to re-solder
above disconnected points, oth-
erwise no TX modulation or AF
output is available when you
remove the scrambler units.

A

B

Front panel

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