Icom IC-M422 Service Manual page 32

11-2 LOGIC BOARD
CP4
TDEC
C8
0.001
CH/WX 73
P14/KI4
SCAN 74
P13/KI3
CH16 75
P12/KI2
DOWN 76
P11/KI1
UP 77
P10/KI0
78
SEG47/P07
79
SEG46/P06
80
SEG45/P05
81
SEG44/P04
82
SEG43/P03
83
SEG42/P02
84
SEG41/P01
C7
85
SEG40/P00
0.1
86
SEG39/P127
87
SEG38/P126
IC1
88
SEG37/P125
89
SEG36/P124 M30220MA-137RP
90
SEG35/P123
L5V
91 (FX-2852A-1)
VCC
SEG34 92
SEG34/P122
93
VSS
SEG33 94
SEG33/P121
SEG32 95
SEG32/P120
SEG31 96
SEG31/P117
SEG30 97
SEG30/P116
SEG29 98
SEG29/P115
SEG28 99
SEG28/P114
SEG27 100
SEG27/P113
SEG26 101
SEG26/P112
SEG25 102
SEG25/P111
SEG24 103
SEG24/P110
SEG23 104
SEG23/P107
SEG22 105
SEG22/P106
SEG21 106
SEG21/P105
SEG20 107
SEG20/P104
SEG19 108
SEG19/P103
SEG0–18
C18
0.01
R76
DS13 DS12
390
FY1101F-TR FY1101F-TR
R75 DS11 DS10
390
FY1101F-TR FY1101F-TR
R74
DS9 DS8
390
FY1101F-TR FY1101F-TR
CP11 CP13 CP17
CP15
S1 S3 S5 S7
R73
820
DS6
DS7
SML-311YT
SML-311YT
DS4
R72
DS5
SML-311YT
820 SML-311YT
CP12 CP14 CP16
CP18
S2 S4 S6 S8
LOGIC BOARD
CP1
L5V
C1 C2
R1 R2
47k 47k 10 0.01
36
P63/TXD0
35 EDATA
P64/CTS1/RTS1/C
34
P65/CLK1
33
P66/RXD1
32
P67/TXD1
31
P70/TXD2/SDA
30
P71/RXD2/SCL
29
P72/CLK2
28
P73/CTS2/RTS2
27
P74/INT0
26 R5 R6
P75/INT1
25 47k 10k
P76/INT2
24
P77/NMI
23 L5V
VCC
22
XIN
21
VSS
20
XOUT
19
RESET
18
XCOUT
17
XCIN
16 CNVSS
CNVSS
15
P80/TA4OUT/INT5
DSDEC
14
P81/TA4IN/INT5
13
P82/TA5OUT
12
P83/TA5IN
11
P84/TA6OUT
10
P85/TA6IN
9
P86/TA7OUT
8
P87/TA7IN
7 WXDEC
P90/AN0
6 SQLV
P91/AN1
5
P92/AN2
4 LBAT
P93/AN3
TXDET
3
P94/AN4
2 KEYM
P95/AN5
1
P96/AN6
C12
0.047
C11
C15 C13
0.047 0.047
0.047
LBAT
R11
R13 R12
C16 C14
10k 150k
0.047 0.047 47k
C17
0.1
L5V
DS/BPF
R17 BEEP BEEP
10k
R14
1.5k
S5V
R18
10k
R15
12k
CONT0
R19
10k
R16
5.6k
CONT1
DIM
VCC
B Max:10.78V
Min: 3.60V
DS1
SDT-DT161-HP-O
OFF: 0.00V
R51
27
Q1 R52
27
KTA1664 Y
LEDV
R53
27
VCC
C51
10
R63
C52
10k 0.001
Q2
KTC4075 BL
CP19
DIM
R60
Q3
39k
R64 R62 R61 C54
KTC4075 BL
S9
1.5k 47k
1k 0.1
DS3
SML-311YT
DS2
SML-311YT
R71
820
Explanatory notes
VOLTAGE LINE
TX LINE C121 C122
0.01 47p
RX LINE
VOL1
COMMON LINE
VOL2
VOLG
L5V
ECK XIN R31
COMRXD 47k
COMTXD
R3
CLOTXD IC4
1M
CLORXD XOUT C31 R32
HN58X2464TI
0.1 10k
R4
100
1 8
A0 VCC
2 7
A1 WP
C4 C3 3 6
X1 ECK
A2 SCL
24p CR-739 24p 4 5
EDATA
VSS SDA
XIN
GND
XOUT R7
RESET 47k
EVCK
EVDATA
PSTB
PCK
PDATA
C5 C6
SQL
0.001 470p
5.09V
R21
IC2
10k
L5V
S-80942CNMC-G9C G
R22 RESET
1 5
47k OUT CD
HV
2
VDD
4
3 VSS
NC
C22
R23 C21
0.027
47k 0.47
13.80V
HV
IC3
R25
5.09V
AN78L05M
47
L5V HVI
O I
G
C27 C28 C25 C26
0.01 0.01
10 10
VCC
IC5
NJM2904M
C41
0.1
DSCENC 1 8
2 7
DS/BPF 3 R48
6
R41
4 JPW
BPFV
3.3k 5
R46
6.8k
R42
100k
R45
R43
1M 10k
DSCENC
C42
C43
220p
10p
1
2
3
S5V
J6
PWR S5V
S5V
1
1
SQLV SQLV
2
2
C123 C124 C125 C126 GND GND
3
3
0.001 47p 0.001 47p PWR PWR
4 1
4
VOL1 VOL1
5 2
5
VOL2 VOL2
6
6 3
VOLG VOLG
7 4
7
GND GND
8 8 5
W3 OPC-1442
S5V
C91
0.1
R92
47
EXTTXD
Q8
2SA1576 R
COMTXD
COMRXD
Q9
2SK1069-4-TL-E
EXTRXD
R95
1k
NMRXD
R98
L5V
47k
Q4 R35
15k S5V
KRC414
C83
0.1
ICF3
D1
R36
S5V
KDS122
1k
C87 C86
0.001 0.1
CLORXD
R37
NMTXD
1k
CLOTXD
D5
1SS355
PTT
R106
47k
S5V
CH01A:3.63V
CH16: 4.05V
WX10: 7.76V
S5V
PWR
EXTTXD
EXTRXD
SQL
R1
BOARD
10k-B
J1
S5V
1
SQLV
2
GND
3
J1 R1 10k-A
PWR
1
VOL1
2
3
VOL2
4
VOLG
5
GND
VR BOARD
11 - 3
Q7
2SC4081 S
S5V
R91
4.7k
S5V
IC7
TC7W14FU F
COMTXD 1 8 S5V
COMRXD 2 7
C95
/NMEAI 3 6
0.1
4 5
NMEAI
R96
R97
47k
1k
NMEAI
IC6
D6
1SS355 PC357NJ0000F
EP81
R81
R83 / NMEAI
C81 C88
820 J2
1k 0.001
0.068
D2 NMEAI+
1
1SS355
C82 R82 NMEAI–
2 to REAR CABLE
0.01 4.7k NMEAO
W1
3
Q5
C89 GND OPC-1405
4
0.001
2SC4081 S R86
12
C90
0.001
R88 R87
100k 4.7k
R85
100k
D4
MA8062 M
Q6 D3
KDS122
KRC404
J1
L5V
1
CNVSS
2
RESET
3
NMTXD
4
NMRXD
5
SCLK
6
BUSY
7
GND
SCLK
8
HV
9
GND
10
R101
100
PTT
C101 C102
0.001 0.001 J3
PTT
1
MICG
2
MIC to
R103 3
HM-150B/SW
GND
JPW
MIC1 EP101
4
KEYM
5
R104
C103
JPW C104
470p
0.001
Internal
Speaker
KEYM
CP2 SP+
+
C111
0.001
CP3 SP–
–
C112
0.001 J4
SP+
29
30
SP+
28 27
SP–
SP–
26 25
BEEP BEEP
PWRON
24 23
22 21
HV
20 19
VCC
18 17
VOL1 VOL1
to MAIN unit
GND
16 15 J4
VOL2 VOL2
W4
GND
13 OPC-1439
14
VOLG VOLG
DSCENC DSCENC
12 11
GND
WXDEC WXDEC
10 9
GND
DSDEC DSDEC
8 7
GND
ICF3
6 5
S5V
GND
4 3
MIC1
GND
2 1
MIC2
CP5
CP6
C113 C114
0.001 470p
CP7
J5
EVCK
30 29
EVDATA
GND
27
28
GND
SEND
26 25
RCV
MMUTEM
24 23
RMUTEM
MMUTES
22 21
RMUTES
MMUTEP
20 19
RMUTEP
to MAIN unit
TMUTE
18 17 J5
PAMUTE
W5
H/L
OPC-1439
16 15
ATT
PTTM
14 13
BPFV
PTTS
11
12
GND
TXDET
10 9
SQL
GND
8 7
GND
EXTTXD
6 5
EXTRXD
UNLK
4 3
PDATA
PSTB
2 1
PCK