I Optional Ut-105/Ut-108 Installation; I Optional Ut-109/Ut-110 Installation - Icom IC-F521 Instruction Manual

4
CONNECTION AND MAINTENANCE
I Optional UT-105 and UT-108
installation
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.
17
I Optional UT-109 /UT-110
installation
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.
A
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.
Front panel
B