Icom IC-M422 Service Manual - Logic Board
11 - 3
Internal
Speaker
–
+
PCK
PDATA
SEND
UNLK
PSTB
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
GND
EXTRXD
DS1
SDT-DT161-HP-O
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 31 32 33 34 35 36 37 38 39
IC5
NJM2904M
1
2
3
4
5
6
7
8
IC1
M30220MA-137RP
(FX-2852A-1)
1
P96/AN6
2
P95/AN5
3
P94/AN4
4
P93/AN3
5
P92/AN2
6
P91/AN1
7
P90/AN0
8
P87/TA7IN
9
P86/TA7OUT
10
P85/TA6IN
11
P84/TA6OUT
12
P83/TA5IN
13
P82/TA5OUT
14
P81/TA4IN/INT5
15
P80/TA4OUT/INT5
16
CNVSS
17
XCIN
18
XCOUT
19
RESET
20
XOUT
21
VSS
22
XIN
23
VCC
24
P77/NMI
25
P76/INT2
26
P75/INT1
27
P74/INT0
28
P73/CTS2/RTS2
29
P72/CLK2
30
P71/RXD2/SCL
31
P70/TXD2/SDA
32
P67/TXD1
33
P66/RXD1
34
P65/CLK1
35
P64/CTS1/RTS1/C
36
P63/TXD0
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
P15/KI 5 P16/KI 6 P17/KI 7 P18/KI 8 P19/KI 9 P22/K10 P23/K11 P24/K12 P25/K13 P26/K14 P27/K15 P30/K16 P31/K17 P32/K18 P33/K19
SEG18/P102 SEG17/P101 SEG16/P100 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0 COM3 COM2 COM1 COM0 C2 C1 VL3 VL2 VL1 VSS P132/D
A2
P131/D
A1
A
VSS
P130/ADTRG/D
A
O
VREF A
V
OC
P97/AN
P34 P35
P40/T
A0OUT
P41/T
A0IN
P42/T
A1OUT
P43/T
A1IN
P44/T
A2OUT
P45/T
A2IN
P46/T
A3OUT/INT4
P47/T
A3IN/INT4 P50/TB0IN P51/TB1IN P52/TB2IN P53/TB3IN P54/TB4IN P55/TB5IN
P56/INT3
P57/CK
OUT
P60/CTS0/R
TS0
P61/CLK0 P62/RXD0
73
P14/KI4
74
P13/KI3
75
P12/KI2
76
P11/KI1
77
P10/KI0
78
SEG47/P07
79
SEG46/P06
80
SEG45/P05
81
SEG44/P04
82
SEG43/P03
83
SEG42/P02
84
SEG41/P01
85
SEG40/P00
86
SEG39/P127
87
SEG38/P126
88
SEG37/P125
89
SEG36/P124
90
SEG35/P123
91
VCC
92
SEG34/P122
93
VSS
94
SEG33/P121
95
SEG32/P120
96
SEG31/P117
97
SEG30/P116
98
SEG29/P115
99
SEG28/P114
100
SEG27/P113
101
SEG26/P112
102
SEG25/P111
103
SEG24/P110
104
SEG23/P107
105
SEG22/P106
106
SEG21/P105
107
SEG20/P104
108
SEG19/P103
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
109 110 111 112 113 114 115 116
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
CP15
Q5
2SC4081 S
R42
100k
R41
3.3k
R25
47
DS10
FY1101F-TR
R74
390
R53
27
DS3
SML-311YT
DS2
SML-311YT
EP101
CP18
R37
1k
DS4
SML-311YT
S4
R95
1k
R96
47k
R97
1k
C7
0.1
CP14
R31
47k
Q8
2SA1576 R
S5
R83
1k
X1
CR-739
S7
IC3
AN78L05M
I
O
G
S2
CP17
Q9
2SK1069-4-TL-E
CP13
S1
DS7
SML-311YT
IC7
TC7W14FU F
1
2
3
4
5
6
7
8
R48
JPW
C41
0.1
C42
220p
C43
10p
C26
0.01
C25
10
C28
0.01
C27
10
CP12
S6
S9
R103
JPW
R52
27
DS13
FY1101F-TR
D6
1SS355
R73
820
R86
12
R32
10k
IC4
HN58X2464TI
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
R60
39k
J1
1
2
3
4
5
6
7
8
9
10
11
12
DS9
FY1101F-TR
R72
820
R21
10k
Q7
2SC4081 S
D5
1SS355
DS11
FY1101F-TR
CP19
J3
1
2
3
4
5
6
7
DS8
FY1101F-TR
CP3
DS5
SML-311YT
R7
47k
S3
IC6
PC357NJ0000F
R101
100
R92
47
R75
390
DS12
FY1101F-TR
R76
390
S8
R51
27
DS6
SML-311YT
IC2
S-80942CNMC-G9C G
1
OUT
2
VDD
3 VSS
4
NC
5
CD
CP16
R91
4.7k
R104
JPW
CP11
CP4
R15
12k
R14
1.5k
R16
5.6k
R11
150k
R12
47k
R13
10k
R46
6.8k
R43
1M
R45
10k
Q4
KRC414
Q6
KRC404
Q1
KTA1664 Y
Q2
KTC4075 BL
Q3
KTC4075 BL
D1
KDS122
R22
47k
C21
0.47
C22
0.027
R23
47k
R81
820
EP81
J2
1
2
3
4
5
6
EXTTXD
SCLK
SCLK
COMRXD
COMRXD
COMTXD
COMTXD
MIC
GND
VOL1
VOL2
EVCK
J5
J4
EVDATA
WXDEC
SQLV
SQL
LEDV
DIM
PWR
PWR
UP
CH/WX
CH16
SCAN
DOWN
BE
TXDET
LBAT
LBAT
BEEP
PDATA
PCK
PSTB
EVDATA
EVCK
CNVSS
TDEC
COMRXD
COMTXD
DSCENC
DSCENC
DSCENC
CLOTXD
CONT0
CONT1
CLORXD
GND
GND
KEYM
KEYM
NMTXD
NMTXD
EXTRXD
DSDEC
RESET
RESET
RESET
XOUT
XOUT
GND
GND
VCC
VCC
VCC
NMRXD
NMRXD
BPFV
BPFV
DS/BPF
XIN
XIN
GND
ECK
ECK
EDATA
EDATA
KEYM
NMEAI
NMEAI
/NMEAI
/ NMEAI
HVI
HV
HV
HV
CLOTXD
CLORXD
GND
GND
ICF3
MIC1
VOLG
S5V
S5V
S5V
S5V
S5V
S5V
S5V
S5V
S5V
S5V
PTT
PTT
H/L
MMUTEP
PTTS
MMUTES
PTTM
MMUTEM
TMUTE
RCV
RMUTEM
RMUTES
RMUTEP
PAMUTE
ATT
BPFV
SQL
TXDET
EXTTXD
EXTRXD
EXTTXD
MIC2
MIC1
GND
GND
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
GND
S5V
SP+
SP+
SP+
SP–
SP–
SP–
GND
DSDEC
GND
DSCENC
GND
PWRON
BEEP
BEEP
HV
VCC
VOL1
VOL2
VOLG
VOL1
VOL2
VOLG
GND
WXDEC
DSDEC
DSCENC
WXDEC
ICF3
SEG19–34
SEG0–18
L5V
L5V
L5V
L5V
L5V
L5V
L5V
L5V
L5V
GND
NMEAO
NMEAI–
NMEAI+
CP2
MICG
to
HM-150B/SW
to MAIN unit
J4
W4
OPC-1439
to MAIN unit
J5
W5
OPC-1439
PTT
J6
1
2
3
4
5
6
7
8
9
0
1
VOL1
VOL2
SQLV
PWR
VOLG
S5V
GND
GND
CNVSS
BUSY
to REAR CABLE
W1
OPC-1405
SQL
V
C111
0.001
C112
0.001
R98
47k
C83
0.1
C82
0.01
R82
4.7k
C87
0.001
C86
0.1
R88
100k
R106
47k
C101
0.001
R87
4.7k
C102
0.001
C103
470p
D4
MA8062 M
D2
1SS355
C88
0.001
C89
0.001
C90
0.001
R85
100k
D3
KDS122
C104
0.001
C113
0.001
C114
470p
C5
0.001
C6
470p
C91
0.1
C95
0.1
CP7
CP6
CP5
LOGIC BOARD
R2
47k
C1
10
C2
0.01
R5
47k
R6
10k
R3
1M
R4
100
C4
24p
C3
24p
C31
0.1
R35
15k
R36
1k
R63
10k
R64
1.5k
R62
1k
R61
47k
C51
10
C52
0.001
C54
0.1
C18
0.01
R17
10k
R18
10k
R19
10k
C17
0.1
C15
0.047
C11
0.047
C12
0.047
C13
0.047
C14
0.047
C16
0.047
C121
0.01
C122
47p
C123
0.001
C124
47p
C125
0.001
C126
47p
DXTMN
DXRMN
B
USY
SCLK
CNVSS
R1
47k
C8
0.001
C81
0.068
R71
820
R1
10k-B
J1
SQLV
GND
R1 10k-A
J1
VOLG
VOL2
VOL1
1
2
3
1
2
3
5
4
3
2
1
5
4
3
2
1
GND
PWR
PWR
GND
GND
S5V
SQLV
S5V
VOL2
VOLG
VOL1
W3 OPC-1442
1
2
3
4
5
6
7
8
SQL
BOARD
VR BOARD
CP1
P
A
DSC
LO/DX
DTRS
UP
DO
WN
CH16
SCAN
CH/WX
DSC
LO/DX
DTRS
PTTM PTTS MMUTEM MMUTES MMUTEP RMUTEM RMUTES RMUTEP
UNLK
TDEC
PWR
P
AMUTE
PWR
ON
TMUTE
SEND
RCV
H/L
A
TT
PTT
PWR
COM0 COM1 COM2 COM3 SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
COM0 COM1 COM2 COM3
SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
DIM
BEEP
DS/BPF
SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
COM3 COM2 COM1 COM0
VOLTAGE LINE
TX LINE
RX LINE
Explanatory notes
COMMON LINE
5.09V
13.80V
5.09V
B Max:10.78V
Min: 3.60V
OFF: 0.00V
CH01A:3.63V
CH16: 4.05V
WX10: 7.76V
11-2 LOGIC BOARD