Icom IC-M304

11 - 1
SECTION 11 VOLTAGE DIAGRAM
3.31V
R:6.85V
DIM MAX:12.27V
0V
0.46V
7.9872MHz
DS 7
RY-SP110UHY24
27
R23
S-80942CNMC
IC5
1
OUT
2
VDD
3
VSS
4
NC
5
CD
J2
B4B-ZR-SM4-TF
1
2
3
4
56
12K
R27
39K
R24
470P
C44
10K
R3
DTRS
S7
UP
S5
1M
R65
10K
R42
10K
R62
47K
R15
KDS122
D3
5.6K
R1
NJM2904M
IC6
1
2
3
4
5
6
7
8
150K
R14
24P
C31
KTA1664
Q2
0
R67
390
R31
0.01
C11
100K
R51
3.3K
R28
M37560EFGP
IC1
1
P67/AN7
2
P66/AN6
3
P65/AN5
4
P64/AN4
5
P63/SCLK22/AN3
6
P62/SCLK21/AN2
7
P61/SOUT2/AN1
8
P60/SIN2/AN0
9
P57/ADT/DA2
10
P56/DA1
11
P55/CNTR1
12
P54/CNTR0
13
P53/RTP1
14
P52/RTP0
15
P51/PWM1
16
P50/PWM0
17
P47/SRDY1
18
P46/SCLK 1
19
P45/TXD
20
P44/RXD
21
P43/TOUR
22
P42/INT2
23
P41/INT1
24
P40
25
P77
26
P76
27
P75
28
P74
29
P73
30
P72
31
P71
32
P70/INT0
33
RESET
34
XCIN
35
XCOUT
36
XIN
37
XOUT
38
VSS
39
P27
40
P26
41
P25
42
P24
43
P23
44
P22
45
P21
46
P20
47
P17
48
P16
49
P15/SEG39
50
P14/SEG38
51
P13/SEG37
52
P12/SEG36
53
P11/SEG35
54
P10/SEG34
55
P07/SEG33
56
P06/SEG32
57
P05/SEG31
58
P04/SEG30
59
P03/SEG29
60
P02/SEG28
61
P01/SEG27
62
P00/SEG26
63
P37/SEG25
64
P36/SEG24
65
P35/SEG23
66
P34/SEG22
67
P33/SEG21
68
P32/SEG20
69
P31/SEG19
70
P30/SEG18
71
SEG17
72
SEG16
73
SEG15
74
SEG14
75
SEG13
76
SEG12
77
SEG11
78
SEG10
79
SEG9
80
SEG8
81
SEG7
82
SEG6
83
SEG5
84
SEG4
85
SEG3
86
SEG2
87
SEG1
88
SEG0
89
VCC
90
VREF
91
AVSS
92
COM3
93
COM2
94
COM1
95
COM0
96
VL3
97
VL2
98
C2
99
C1
100
VL1
0.47
C21
30FLT-SM2-TB
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
470P
C4
470P
C2
KTC4075
Q3
0.001
C26
10K
R16
0.1
C6
DN
S4
470P
C41
DS 4
SML-311YT
0.01
C25
0.001
C14
DS 6
RY-SP110UHY24
0.001
C12
47K
R25
CP1
CP10S
CP10S
CP7
10K
R4
150
R40
10K
R56
6.8K
R54
22
C22
CP4
CP10S
1SS355
D2
0.0047
C16
DTC114TU
Q6
10K
R64
27
R21
1K
R29
15K
R37
100K
R61
0.01
C3
KTC4075
Q4
CH1 6
S3
10K
R5
TC7S14FU
IC3
1
2
3
4
5
27
R22
CP10S
CP6
HN58X2464TI
IC4
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
CH/WX
S2
220
R35
0.01
C5
1SS355
D1
0.001
C43
CR-834
X1
SML-311YT
DS 3
0.01
C17
470P
C42
1K
R38
6.8K
R36
0.01
C1
DSC
S6
1M
R52
SCAN
S1
0.027
C23
DS 5
SML-311YT
0.01
C7
BE
CP3
10K
R43
10K
R63
22P
C32
1K
R30
10K
R41
0.01
C18
SDT-DM2360
DS1
1
S27
2
S28
3
S13
4
S14
5
S15
6
S16
7
S17
8
S18
9
S19
10
S20
11
S21
12
S22
13
S23
14
S24
15
S25
16
S26
17
C0
18
C1
19
C2
20
C3
21
S1
22
S2
23
S3
24
S4
25
S5
26
S6
27
S7
28
S10
29
S11
30
S8
31
S9
32
S12
CP10S
CP5
SML-311YT
DS 2
CP2
CP10S
PC357N6J000F
IC2
0.01
C13
1K
R26
10K
R55
10K
R53
TXDET
SQLV
PCK
PDATA
WXDEC
BEEP
PSTB
DSCDEC
UNLK
SEG6
SEG18
SEG19
SEG20
SEG3
SEG21
SEG22
SEG23
SEG2
SEG24
SEG25
SEG26
SEG1
SEG12
TMUTE
SEND
RCV
BPLV L
RMUTE
H/ L
SQLC
PTTC
KEYM
PTT SQ L BPF
SEG27 SEG28 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26
SEG12
SEG9 SEG8
SEG11 SEG10
SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1
COM3 COM2 COM1 COM0
SEG27
BEE P
TMUTE
TXDET
H/ L
PSTB
PDATA
WXDEC
DSCDEC
RCV
SEND
BPLVL
DSCENC
RMUTE
PTTC
PTT
KEYM
SQL
SQLC
BPF
PCK
UNLK
GND
COM0 COM1 COM2 COM3
SEG4 SEG5 SEG8 SEG9
SEG10 SEG11 SEG28 SEG13 SEG14
SEG7
SEG15 SEG16 SEG17
SQLV
DSCENC
5V
5V
5V
HVS
NMEA+
NMEA-
ICF3
SP-SP+
HVS
5V
ICF3
R1
10k
J1
To W1 (MAIN UNIT)
To W1 (MAIN UNIT)
1
2
3
4
5
VOL1
VOL2
GND
HV
HVS
R1
10k
J1
1
2
3
GND
SQLV
SQLI
• LOGIC UNIT
• VR UNIT
• SQL UNIT