Voltage Diagram; Logic Board - Icom IC-M402 Service Manual

SECTION 11

VOLTAGE DIAGRAM

11-1 LOGIC BOARD

DS1
TTR5341
1 SEG26
S27
2 SEG27
S28
3 SEG12
S13
4 SEG13
S14
5 SEG14
S15
6 SEG15
S16
S17 7 SEG16
S18 8 SEG17
S19 9 SEG18
S20 10 SEG19
S21 11 SEG20
12 SEG21
S22
13 SEG22
S23
14 SEG23
S24
15 SEG24
S25
16 SEG25
S26
17 COM0
C0
18 COM1
C1
19 COM2
C2
20 COM3
C3
21 SEG0
S1
22
S2 SEG1
S3 23 SEG2
S4 24 SEG3
S5 25 SEG4
S6 26 SEG5
S7 27 SEG6
28 SEG9
S10
29 SEG10
S11
30 SEG7
S8
31 SEG8
S9
32 SEG11
S12
IC3
BU4094BCFV
EXSTB 1 VDD 16
STRB
PDATA 2
DATA OENA
PCK 3 Q5 14
CLK
RMUTM 4 Q6 13
Q1
RMUTS 5 Q7 12
Q2
PTTM 6 Q8 11
Q3
PTTS 7 Q'S 10
Q4
8 QS 9
VSS
R34
IC7
470 PC357N6T
J2
3
from NMEA+ D1
1
external NMEA
ISS355
2
GPS
4
C9
0.0047
R35
6.8 k
C26 Q5
0.01
2SC4081 R
R77 R36
47 4.7 k
Q7
J1
5
2SA1576 R
LCDA
1
from/to
CLDA
2
Remoto MIC
ICF3
3
(HM-127) GND
4
6 Q10
2SK1069 4
R41
D2
1 k
ISS355
Q9
DTA114EU
R42
R43
47 k
1 k
Q6
DTC114EU
ICF3_ON 0 V
HM-127_ON 4.98 V
R20 18 k
DIM3
DS7
DIM2
FY1101 F-TR
DS8
FY1101 F-TR
DIM1
R26
330
NMEAI
5V
EXOE
15
RCV
SEND
SMUTE
MMUTE
C14
0.01
PTTS
PTTM
RMUTS
RMUTM
9.83 MHz
5V
3.8 Vp-p
C24
C13
27 P
NMEAI
0.01
IC6
R84
R45
CR-691
S-80942 ANMP-DD6 100 k
39 k
5 OUT 1
IC4 CD
VDD 2 C28 24 P
TC74HC14AF 4
3
NC VSS
C27
C10
0.01
0.027
R44
39 k
IC2
HN58X2432TI
1 VCC 8
A0
2 WP 7
A1
3 6
A2 SCL
4 5
VSS SDA
C12
0.01
IC5
TC74HC02AF
ICFC
1 14
C25
2 13
0.01
3 12 DIM3
4 11
R39
5 10
47 k
6 9
C11
7 8
0.01
RRXD
RTXD
R46
8.2 k
R47
10 k
Q3
R10
2SB1132 R
27
R17
HVS
10 k
R12
R11
R15
R21 12 k
27
39 k Q4
18 k Q2
BAND EXTENTION
2SC4116 BL 2SC4116 BL
R83
R18
27
10 k
R22
18 k
C20 C21
R19 R13 C32
0.01 0.001
18 k R16 R14 3.3 k 0.001
1 k
47 k
HVS
R76
R75
100 k
150 k
R74
47 k
5V
R78
100 k
1
CONT1
P10/TMOW
CONT2 2
P11/TMOFL
BEEPM 3
P12/TMOFH
EXOE 4
P13/TMIG
CH16 5
P14/IRQ4/ADTRG
CHWX 6
P15/IRQ1/TMIC
H/L 7
P16/IRQ2
DSDEC 8
P17/IRQ3/TMIF
9
X1
10
X2
X1 R7 11 IC1
VSS
1 M 12
HD6473847 RH
OSC2
13
OSC1
14
TEST
15
RES
RES
16
PCK
P20/SCK1
17
PSTB
P21/SI1
18
PDATA
P22/SO1
EXSTB 19
P23
ICFC 20
P24
BPLVL 21
P25
ECK 22
P26
EDA 23
P27
DIM1 24
P30/PWM
DIM2 25
P31/UD
R80 10 k
R81 10 k
R82 100 k
R79
100 k
DSENC
R85
3.3 k C30
0.01
Q11
DSENC1
2SK1069 4
R62
20 k
R54 R72
R52 R53
R55
10 k 20 k
10 k 10 k
10 k
R50 R51
15 k
1.5 k
DTRS
DSC
UP
DN
R3 R4
R1 R2
100 k 100 k
100 k 100 k
S1 S2 S3 S4
R86
100 k
5V
DTRS DSC UP DN 16CH
R6
DS4
DS3
820 DS5
SML-311 YT
SML-311 YT
SML-311 YT
HVS
PTT
KEYM
C2
0.001
R87 100 k
TMUT
Q1
R9 C8
BEEPM
33 k DAT144EU
10
BPLVL
RCV
C18
SEND
0.01
TMUT
TXDET
P90/SEG33 75 DSENC
SEG24
P87/SEG32 74 HI/LO
SEG23
DSDEC
P86/SEG31 73 SEG22
SQLV
P85/SEG30 72 SEG21
WXDEC
P84/SEG29 71 SEG20
PTT
P83/SEG28 70 SEG19
PTTS
P82/SEG27 69 SEG18
BPFV
P81/SEG26 68 SEG17
PTTM
P80/SEG25 67 SEG16
RMUTS
P79/SEG24 66 SEG15
RMUTM
P76/SEG23 65 SEG14
SMUTE
P75/SEG22 64 SEG13
P74/SEG21 63 SEG12 MMUTE
P73/SEG20 62 SQL
SEG11
P72/SEG19 61
SEG8
P71/SEG18 60 UNLK
SEG7
P70/SEG17 59 PDATA
SEG10
P67/SEG16 58 PSTB
SEG9
PCK
P66/SEG15 57 SEG6
P65/SEG14 56 SEG5
P64/SEG13 55 SEG4
P63/SEG12 54 SEG3
P62/SEG11 53 SEG2
P61/SEG10 52 SEG1
51 SEG0
P60/SEG9
5V
4.98
C23
C22
0.01
10
DSENC
DSENC7
2SK1069 4
DSENC6
DSENC5
DSENC4
R73
DSENC3
220 k
DSENC2
R66
R63 R64 R67 R68
R65
R69
20 k 20 k 20 k 20 k 20 k
20 k
20 k
R57 R58
R56 R59 R60 R61
10 k
10 k 10 k 10 k 10 k 10 k
11 - 1
DTRS
DSC
UP
DN
CH16 CH16
CHWX CHWX
H/L
S5 S6 S7
CHWX H/L
R5
DS6 820
SML-311 YT
13.81 V
SP
to Internal Speaker
SP+
C1
0.001
J4
HVS SP+
40
SP+
39
38
SP
37
SP
36
BEEPM
35
BPLVL
34
33
HVS
32
HVS
31
from/to main unit J6
30
5V
29
5V
28
RCV
27
26
SEND
25
24
23
TMUT
22
21
TXDET
20
DSENC
19
HI/LO
18
DSDEC
17
SQLV
16
WXDEC
15
PTT
14
PTTS
13
BPFV
12
PTTM
11
RMUTS
10
RMUTM
9
SMUTE
8
MMUTE
7
SQL
6
5
UNLK
4
PDATA
3
PSTB
2
PCK
1
C5 C3
0.001 0.001
C6
C4
470 P
470 P
5V
R8
10 k
3
KEYM J3
1
from Smart Microphone
2
(HM-129)
C7
4
0.01
Q8
C31
R70
0.01
820 k
R71
2.7 k