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Icom IC-F2821 D Manual

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4
CONNECTION AND MAINTENANCE
4
■ 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.
■ Optional OPC-617 installation
Install the OPC-617 as shown below.
q
Dimmer cont. IN
w AF OUT
e Det. AF OUT
r Mod. IN
t PTT control IN or
y Horn drive cont. OUT
u AF GND
i Det. AF GND
o Mod. GND
OPTIONAL CABLE PIN ASSIGNMENT
t r e w q
o i u y
FTSW control IN
OPC-617
Cut off the bushing as in the
illustration, when you install
the optional OPC-617.
FRONTFRONT
MIC and AF OUT
CP37
Un-solder
Re-solder
Remove
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.
… 33 …


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