Icom IC-F7000 Service Manual page 20

4-6-4 OUTPUT EXPANDER IC FOR BANDPASS FIL-
TERS (MAIN UNIT; IC3604)
Pin Port
number name
Outputs 0.5–1.999999 MHz bandpass
4 B0S
filter control signal.
Outputs 2–2.999999 MHz bandpass
5 B1S
filter control signal.
Outputs 3–4.999999 MHz bandpass
6 B2S
filter control singnal.
Outputs 5–6.999999 MHz bandpass
7 B3S
filter control signal.
Outputs 18–23.999999 MHz band-
11 B7S
pass filter control signal.
Outputs 14–17.999999 MHz band-
12 B6S
pass filter control signal.
Outputs 10–13.999999 MHz band-
13 B5S
pass filter control signal.
Outputs 7–9.999999 MHz bandpass
14 B4S
filter control signal.
4-6-5 OUTPUT EXPANDER IC (MAIN UNIT; IC3603)
Pin Port
number name
Outputs NBDP MOD control signal for
4 NMS
the gate mod IC (IC2001, pin 10).
5 EMS Outputs external MOD control signal
for the gate mode IC (IC2001, pin 11).
Outputs microphone MOD control sig-
6 MMS nal for the gate mode IC (IC2001, pin
9).
Outputs NMEA/RS-232C switching
11 NMR
signal.
13 AFMS Outputs AF mute control signal.
Outputs SEND control signal for the
14 CSEN
buffer amplifier (IC1303, pin 6).
Description
Description
4-6-6 D/A CONVERTER IC (MAIN UNIT; IC3606)
Pin Port
number name
5 POCV
11 FANS
13 TRXS
4 - 9
Description
Outputs transmit power control signal.
The signal is applied to the ALC ampli-
fier (IC1201, pin 3) and RF amplifier
(Q701).
Outputs the cooling fan control signal.
The signal is applied to the fan con-
troller (PA unit; IC6501, Q6501).
Outputs the transmitter/receiver
switching signal. The signal is applied
to the switching relay circuit (PLL unit;
RL7301).