Options Installation - Icom IC-730 Maintenance Manual

•
SECTION 6 OPTIONS INSTALLATION
6 - 1 DESCRIPTION
6 - 1 • 1 IC·EX195 (MARKER UNIT)
This unit generates marker signals to calibrate IC·730's
operation frequency. The marker generator puts out ac-
curate 100KHz or 25KHz signals on the entire band, and
gives easy and accurate frequency calibration.
6·1·2 IC·EX203 (CW AUDIO FILTER UNIT)
This unit is an audio filter which gives 150Hz/6 dB pass-
band in the CW operation. This is very effective in reducing
interference from near·by signals and increasing SN ratio.
6 • 1 ·3 IC·EX202 (LOA UNIT)
This unit puts out the band control voltage to change ope·
rating band automatically for external equipment such as
a linear amplifier and an antenna tuner.
6 • 1 ·4 IC·EX205 (TRV UNIT)
This unit provides terminals to put out a low level RF
6 • 2 PREPARATION
6·2·1 TOOLS FOR INSTALLATION
The following tools are needed for the installation of the
options.
Tools IC-EX195 IC-EX203 IC-EX202
Philips
0 0 0
Screwdriver
Screwdriver
for 2mm
X
0 0
Hex-hole Screw
Soldering
Iron X X X
(20W-40W)
Solder
X X X
(rosin core)
De-soldering
X X X
Braid
Diagonal
X X
X
Cutter
Long-nose
X X X
Pliers
signals, and for receiver input and T/R control on the rear
panel of IC-730 for a VHF/UHF transverter.
6·1·5 FL-44(A) (455KHz
ssa
CRYSTAL FILTER)
This filter is for replacement of the 455KHz mechanical
filter installed in the 2nd IF circuit, and has a higher shape
factor and provides more selectivity.
6·1 ·6 FL·30 (SSB PASS BAND TUNING CRYSTAL
FILTER)
This filter provides the Pass Band Tuning system which
narrows the I F Pass Band continuously up to 1 KHz either
from upper side or lower side. This is very effective in
reducing interference from nearby signals.
6·1·7 FL-45 (CW NARROW CRYSTAL FILTER)
This filter provides a 500Hz/6 dB pass band in the CW ope-
ration. When the MODE Switch of IC-730 is set in the
"CW·N" position, this filter is selected automatically.
IC-EX205 FL-44(A)
FL-30
FL-45
0 0
0 0
X
X X X
X
0 0
0
X
0 0
0
X
0 X X
X
0 0 0
X
0 0 0
NOTE:
0
means NEEDED, X means NOT NEEDED
6 - 2 - 2 PREPARATION
Before performing any work on the set, make sure that
power cord is unplugged from the transceiver.
6-1
Remove the top cover by unscrewing the four screws on the
top and the
two
screws at each side, while taking care not
to damage the internal speaker and unplug its connector.
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