28
4
CONNECTION AND MAINTENANCE
■
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. 27
t
Replace the bottom cover and screws.
■
Optional OPC-617 installation
Install the OPC-617 as shown below.
q
Dimmer cont. IN or
IGSW 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.
FRONT
FRONT
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.
!IC-F1721D.qxd 04.9.15 9:43 AM Page 28 (1,1)
