Icom IC-PW1 Service Manual page 84

3-5-3 EXPANDER IC (SWITCH BOARD; IC3)
Pin Port
number name
Outputs "50" LED control signal.
4 50ML
High: While "50" LED is ON.
Outputs "24" LED control signal.
6 24ML
High: While "24" LED is ON.
Outputs "7" LED control signal.
11 7ML
High: While "7" LED is ON.
Outputs "10" LED control signal.
12 10ML
High: While "10" LED is ON.
Outputs "14" LED control signal.
13 14ML
High: While "14" LED is ON.
14 18ML Outputs "18" LED control signal.
3-5-4 EXPANDER IC (SWITCH BOARD; IC4)
Pin Port
number name
Outputs "3.5" LED control signal.
4 3_5M
High: While "3.5" LED is ON.
Outputs "1.8" LED control signal.
5 1_9M
High: While "1.8" LED is ON.
Outputs "AUTO" LED control signal.
7 AUTOL
High: While "AUTO" LED is ON.
Outputs "AMP/PROTECT" LED con-
trol signal.
11 PROL
High: While "AMP/PROTECT" LED is
Outputs "AMP/PROTECT" LED con-
trol signal.
12 PAL
High: While "AMP/PROTECT" LED is
Outputs "TUNER" LED control signal.
13 TUNL
High: While "TUNER" LED is ON.
Outputs "TRANSMIT" LED control sig-
14 TRANS nal.
High: While "TRANSMIT" LED is ON.
Description
Description
ON.
ON.
3-5-5 SHIFT REGISTER IC (SWITCH BOARD; IC7)
Pin Port
number name
1 ANT
4 TUNER
5 PA
6 MET2
7 MET1
13 BUP
14 BDOWN
15 I1/2
3 - 5
Description
Input port for the antenna switching
signal.
Low: When "ANT" switch is pushed.
Input port for the tuner power ON/OFF
switching signal.
Low: When "TUNER"
pushed.
Input port for the PA power ON/OFF
switching signal.
Low: When "AMP/PROTECT" switch
is pushed.
Input port for the meter mode select
signal for meter-2.
Low: When "METER-2" switch is
pushed.
Input port for the meter mode select
signal for meter-1.
Low: When "METER-1" switch is
pushed.
Input port for the band up signal.
Low: When "UP" switch is pushed.
Input port for the band down signal.
Low: When "DOWN"
pushed.
Input port for the port select signal.
Low: When "INPUT" switch is select-
ed.
switch is
switch is