Icom IC-PW1 Service Manual page 85

3-5-6 CPU (MAIN UNIT; IC26)
Pin Port
number name
Input port for the forward power volt-
7 FOR
age from IC2 (pin 1).
Input port for the reflected voltage
8 REF
from IC2 (pin 7).
Input port for the voltage from power
9 Vc supply "VO" signal. The voltage is
controlled by R197.
Input port for the current from power
10 Ic supply "IO" signal. The current is con-
trolled by R22.
Input port for the ALC signal which is
11 ALCM
used for the METER-2.
Input port for the signal about temper-
12 TEMP
ature of the heatsink.
Input port for the version set signal.
16 USA
Low: USA version is set.
Input port for the transmit switching
32 SEND signal.
Low: While transmitting
Outputs a input port select signal.
33 I1/2 Low: When INPUT1 is selected.
High: When INPUT2 is selected.
Outputs a bandpass filter select signal.
35 1.9MF High: When 1.8–1.999 MHz band is
Outputs a bandpass filter select signal.
36 3.5MF High: When 3.5–3.999 MHz band is
Outputs a bandpass filter select signal.
37 7MF High: When 7.0–7.300 MHz band is
Outputs a bandpass filter select signal.
38 10MF High: When 10.10–10.150 MHz band
Outputs a bandpass filter select signal.
39 14MF High: When 14.10–14.350 MHz band
Outputs a bandpass filter select signal.
40 18MF High: When
Outputs a bandpass filter select signal.
41 24MF High: When
Outputs a bandpass filter select signal.
42 50MF High: When
Description
selected.
selected.
selected.
is selected.
is selected.
18.068–18.168
band is selected.
24.980–24.990
band is selected.
50.000–54.000
band is selected.
Pin Port
number name
43 ANT1
44 ANT2
45 ANT3
46 ANT4
47 PAF
48 TUF
49 REGF
56 STA
62 ACC81
73 REGT
74 BALA
79 KEY
80 MAXI
MHz
MHz
MHz
3 - 6
Description
Outputs ANT1 select signal to RL4 on
the ANT-SW unit.
Low : When ANT1 is selected.
Outputs ANT2 select signal to RL3 on
the ANT-SW unit.
Low : When ANT2 is selected.
Outputs ANT3 select signal to RL2 on
the ANT-SW unit.
Low : When ANT3 is selected.
Outputs ANT4 select signal to RL1 on
the ANT-SW unit.
Low : When ANT4 is selected.
Outputs cooling fan control signal for
the PA unit.
High: The PA fan is working.
Outputs cooling fan control signal for
the CHASSIS unit.
High: The tuner fan is working.
Outputs cooling fan control signal for
the power supply unit.
High: The power supply fan is working.
Data output port to the tuner CPU in
the MAIN unit.
Input port for the informed signal
about the power switch of the exciter
on JACK1 unit.
High: When power of the exciter is
ON.
Input port for the protect signal about
tempareture of the power supply.
High: While protecting.
Input port for the signal to obtain sta-
ble power from the PA unit.
Data input port from the tuner CPU in
the MAIN unit.
Input port for the protect signal about
the the power supply
High: While protecting.
current.