Icom IC-2GA Service Manual page 15

47 P21
48
P22
49 P23
50 P30
51
P31
52 P32
53
P33
54
55-59
60
P60
61 P61
62 P62
63 P63
64 P70
65 P71
66 P72
67
P73
68
69-80 S0-S12
A
l/OSTB
A
PLSTB
A
CTSTB
H
DET
H
SRFI
H
SRFO
H
LAMPO
5V VDD
XTAL
L
UNLK
L
HI/LOW
L
ENC/DEC
L
ENC
H DAO
H DAI
H DA2
H
DA3
L
RESET
Strobe
signal
output
for I/O
expansion
serial data.
PLL
serial
data, strobe signal output.
CTCSS
serial data,
strobe signal output.
Data equalizer signal input
from
the
CTCSS
decoder.
S/RF meter comparison
input.
S/RF meter comparison
output.
LCD
backlight
LAMP
output.
PLL unlock
input.
Used
for
HLC
output
HI/LOW and
KEYLOCK ON/OFF
switching.
Determines whether or not
a
CTCSS
encoder/decoder
(MN6520)
is
online.
Determines whether
or not a
CTCSS
encoder
(S7116A)
is
online.
Turns
off
standby.
When
resetting,
becomes
"LOW"
for
Initialization.
LCD
driver output
[100 kHz]
DN
[10
kHz]
DN