I Optional Ut-109 Or Ut-110 Installation; I Optional Opc-617 Installation - Icom IC-F1821D Instruction Manual

I Optional UT-109 or UT-110
installation
q Turn the power OFF, then disconnect the DC power cable.
w Unscrew the 4 cover screws, then remove the bottom cover.
e Cut the pattern on the PCB at the TX mic circuit (MIC) and
RX AF circuit (AF OUT), then solder CP37 as shown below.
r Install the scrambler unit as described in the installation of
optional UT-111 installation on p. 28
t Replace the bottom cover and screws.
MIC and AF OUT
NOTE: When uninstalling
the unit
Be sure to re-solder the
disconnected points and
un-solder the connected
points as above when you
remove the unit. Otherwise
no TX modulation or AF
output is available.
FRONT FRONT
CP37
Re-solder
Un-solder
Remove
CONNECTION AND MAINTENANCE

I Optional OPC-617 installation

Install the OPC-617 as shown below.
OPC-617
OPTIONAL CABLE PIN ASSIGNMENT
q Dimmer cont. IN
t r e w q
w AF OUT
e Det. AF OUT
r Mod. IN
t PTT control IN or
FTSW control IN
o i u y
4
Cut off the bushing as in the
illustration, when you install
the optional OPC-617.
y Horn drive cont. OUT
u AF GND
i Det. AF GND
o Mod. GND
4
29