Icom IC-M304 - Page 24

9 - 2
C1 C2
3C
4
C
5
C
C6
7
C
1
1
C
C12
31C
C14
C16
71C
C18
C21
2
2C
32C
C25
62
C
C31
C32
14C
24C
34C
44C
D1
2D
D3
1CI
2C
I
IC3
4CI
IC5
IC6
1J
2J
Q2
Q3
4Q
6Q
3
R1
R
4
R
5
R
41
R
51
R
61R
12R
22R
32R
42R
52R
62R
R27
R28
R29
R30
1
3
R
53R
R36
73R
83R
R40 R41 R42
R43
R51 R52
R53 R54
R55
65
R
R61 R62
R63
R64
R65
7
6R
X1
A8566B
EB
1J
2J
+PS
-PS
0
H
5
H
0
1
H
5
1H
02
H
5
2H
03
H
5
3
H
04
H
5
4
H
0
5
H
5
5
H
0
6
H
56
H
0
7
H
5
7
H
0
8
H
V0
V5
V10
V15
V20
V25
V30
V35
V40
V45
V50
LQS
B-6660
H0
H5
H10
0V
5V
01V
H0
H5
H10
0
V
5V
0
1
V
51
V
-PS
+PS
DNG
0
H
5H
01
H
5
1H
0
2H
52
H
03
H
5
3H
04H
5
4
H
0
5
H
5
5
H
06
H
56H
0
7H
5
7H
0
8
H
58H
09H
59
H
001H
501H
0
1
1H
V0
V5
V10
V15
V20
V25
V30
V35
V40
V45
V50
V55
V60
V65
V70
V75
V80
• MAIN UNIT (BOTTOM VIEW)
• LOGIC UNIT (BOTTOM VIEW)
• SQL UNIT (BOTTOM VIEW)
• VR UNIT (BOTTOM VIEW)
IC4 (MAIN UNIT)
HV
GND
J1
GND 1
2 GND
UNLK
PDATA
PCK
PSTB
BPF
H/L
SQLC
TXDET
SQL
TMUTE
KEYM
SEND
PTT
RCV
PTTC
DSCDEC
RMUTE
WXDEC
DSCENC
5V
5V
NC
HVS
SQLV
BPLVL
BEEP
SP− 29
30 SP+
J2
NMEA+ 1
NMWA−
ICF3
GND 4
SP1 (FRONT UNIT)
W1
(FRONT UNIT)
MP13 (FRONT UNIT)
R1
(FRONT UNIT)
SP−
SP+
To J1 (MAIN UNIT)
M304A3.indd8-9 12/27/200612:28:23PM