Icom IC-PW1, Service Manual Addendum

Page: 108 / 201

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