Icom IC-7800 Service Manual Addendum page 363

3-7-7 RELAY CONTROLLER (ANT-SW UNIT; IC11)
Pin Port
number name
Outputs the antenna ([ANT 1]) select
6 ANT1A
signal for main band.
Outputs the antenna ([ANT 1]) select
7 ANT1B
signal for sub band.
Outputs the control signal to connect
8 ANT1G
the antenna ([ANT 1]) to [GND].
Outputs the antenna ([ANT 2]) select
9 ANT2A
signal for main band.
Outputs the antenna ([ANT 2]) select
10 ANT2B
signal for sub band.
Outputs the control signal to connect
11 ANT2G
the antenna ([ANT 2]) to [GND].
Outputs the antenna ([ANT 3]) select
12 ANT3A
signal for main band.
Outputs the antenna ([ANT 3]) select
13 ANT3B
signal for sub band.
Outputs the control signal to connect
14 ANT3G
the antenna ([ANT 3]) to [GND].
Outputs the antenna ([ANT 4]) select
15 ANT4A
signal for main band.
Outputs the antenna ([ANT 4]) select
16 ANT4B
signal for sub band.
Outputs the control signal to connect
17 ANT4G
the antenna ([ANT 4]) to [GND].
Description
3-7-8 RELAY CONTROLLER (BPF UNIT; IC101)
Pin Port
number name
6 B0A
7 B1A
8 B2A
9 B3A
10 B4A
11 B5A
12 B6A
13 B7A
14 B8A
15 B9A
16 B10A
17 B10WA
3 - 19
Description
Outputs the RX-A circuit bandpass fil-
ter (0.03–1.6 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (1.6–2 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (2–3 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (3–4 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (4–6 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (6–8 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (8–11 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (11–15 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (15–22 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (22–30 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (50–54 MHz) select signal.
Outputs the RX-A circuit bandpass fil-
ter (30–50 MHz and 54–60 MHz)
select signal.