Icom IC-756PROII - Adjustment Procedures; Preparation; Required Test Equipment; Connections

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4
5
6
7
11
12
13
14
Outputs a low-pass filter select signal.
High : When 0.03–1.999999 MHz
band is selected.
Outputs a low-pass filter select signal.
High : When 2.0–4.999999 MHz band
is selected.
Outputs a low-pass filter select signal.
High : When 5.0–7.999999 MHz band
is selected.
Outputs a low-pass filter select signal.
High : When 8.0–11.999999 MHz
band is selected.
Outputs a low-pass filter select signal.
High : When 30.0–60.0 MHz band is
selected.
Outputs a low-pass filter select signal.
High : When 22.0–29.999999 MHz
band is selected.
Outputs a low-pass filter select signal.
High : When 15.0–21.999999 MHz
band is selected.
Outputs a low-pass filter select signal.
High : When 12.0–14.999999 MHz
band is selected.
L1S
L2S
L3S
L4S
L8S
L7S
L6S
L5S
Pin Port
Description
number name
(5) RF-B unit; IC401
Pin
number
Port
name
Description
4 B0S
Outputs a bandpass filter select signal.
High : When 0.03–1.599999 MHz is
selected.
5 B1S
Outputs a bandpass filter select signal.
High : When 1.6–1.999999 MHz is
selected.
6 B2S
Outputs a bandpass filter select signal.
High : When 2.0–2.999999 MHz is
selected.
7 B3S
Outputs a bandpass filter select signal.
High : When 3.0–3.999999 MHz is
selected.
11 B6S
Outputs a bandpass filter select signal.
High : When 8.0–10.999999 MHz is
selected.
12 B5S
Outputs a bandpass filter select signal.
High : When 7.0–7.299999 MHz is
selected.
13 B5WS
Outputs a bandpass filter select signal.
High : When 6.0–6.999999 MHz or
7.3–7.999999 MHz band is
selected.
14 B4S
Outputs a bandpass filter select signal.
High : When 4.0–5.999999 MHz is
selected.
(4) CTRL-A board; IC11
(7) RF-B unit; IC403
Pin
number
Port
name
Description
4 AT1S
Outputs control signal for the
attenuator circuit (RL102, R102,
R106, R111).
Low : When 6 dB attenuator is ON.
5 AT2S
Outputs control signal for the
attenuator circuit (RL103, R112,
R113, R114).
Low : When 12 dB attenuator is ON.
6 PR1S
Outputs control signal for the pre-
amplifier (PRE-AMP board; Q4201,
Q4202).
High : When P.AMP 1 is ON.
7 PR2S
Outputs control signal for the pre-
amplifier (PRE-AMP board; Q4302).
High : When P.AMP 2 is ON.
14 RANS
Output the RX antenna select
signal.
High : When RX antenna is selected.
(6) RF-B unit; IC402
Pin
number
Port
name
Description
4 B7WS
Outputs a bandpass filter select signal.
High : When 11–13.999999 MHz or
14.5–14.999999 MHz band is
selected.
5 B7S
Outputs a bandpass filter select signal.
High : When 14.0–14.499999 MHz is
selected.
6 B8WS
Outputs a bandpass filter select signal.
High : When 15.0–20.999999 MHz or
21.5–21.999999 MHz band is
selected.
7 B8W
Outputs a bandpass filter select signal.
High : When 21.0–21.499999 MHz is
selected.
12 B10S
Outputs a bandpass filter select signal.
High : When 50.0–54.0 MHz is select-
ed.
13 B10WS
Outputs a bandpass filter select signal.
High : When 30.0–49.999999 MHz or
54.000001 MHz band is select-
ed.
14 B9S
Outputs a bandpass filter select signal.
High : When 22–29.999999 MHz is
selected.