Icom IC-703 Service Manual page 72

MAIN UNIT(4)
BUS LINE1
14V
5V
T8L
T8V
8V
R8L
3V
R4002
8.2k
D4001 R4001
MA2S111 15k
CIV
IC4001
TC7W04F
Q4001
2SA1576
5 4
R4004
6 3
12k
Q4002
CIVE
2SC4081
7 2
8 1
SQL
3V
5V
R5101
1k
PWRK
D5101
1SS372
D5102
1SS372
LRXD
R5103
D5103 1SS372
1k
R5105
1k
LTXD _LTXD
3V
R5201 1k
DOTK
DASK
D5201 D5202
R5203 1k
1SS372 1SS372
MAIN
UNIT
(3)
SNDS R5301 1k
SQSS R5303 1k
SPS R5305 1k
AFMS R5307 1k
SPBK R5405 47k
DINT R5401 560k
R5403
47k
Q5401
2SC4081 5V
DSTB
DSRS
MSST
IC5401
TC74HCT7007AF
MDT
MCK
MCK MCK
MDT MDT R5506
R5513 560 VCC
AVXL AVXL
CTCL R5501 1k _CTCL
VOXL R5502 1k _VOXL
R5503 1k _AVXL
MUDL R5504 1k _MUDL
PSS R5505 1k _PSS
R5509 22k
R5510 47k
R5508
R5514 47k
100
R5711 1k
TDAT
Q5701
2SK3018
1
2
3
R5701
1k
START
IC5701
TC7S04F
KEY
R5705
1k
3V
BUS LINE3
11 - 5
14V
5V
T8L
T8V
8V
R8L
3V
_DSPS
_D96S
_COMS
_PRES
_PROS
_ATTS
_IPS
_AFS1
_CTXD _AFS2
_NBS
_CRXD _AMS
_FMS
_AFMS _FSKK
_AGFS
W4002
_CBSY
3V
5V
VCC
_DSPS MATRIX MXV0 D5801 MA2S111 [EUR],[ESP],[DEN],[OTH]
_D96S MXV1 D5802 MA2S111 [FRA],[DEN],[ITR]
_COMS MXV2 D5803 MA2S111 [ESP],[KOR],[ITR]
_PWRK
_PROS MXR2 D5805 MA2S111 [FRA],[ESP],[KOR],[ITR]
_ATTS MXT1 D5806 MA2S111
_AFS1 MX5R D5808 MA2S111 [FRA],[ESP],[DEN],[OTH],[ITR]
_AMS MXET D5813 MA2S111
_MR
_LRXD
IC5961
_ _LTXD
CAT24WC64J
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
VSS SDA
VCC
_DOTK
_DASK
C5903 0.1
C5961 0.1
C5904 0.1
_SNDS
_SQSS
D5506
_SPS
MA2S111
_AFMS
_TOE 76
P12/D10
_TPWR 77
P11/D9
_SPBK _TIFS 78
P10/D8
_B0 79
P07/D7
_AFMS 80
P06/D6
_DSPI 81
P05/D5
_DSTB 82
P04/D4
_DSPI _SPBK 83
P03/D3
_MSST 84
P02/D2
_DSTB _SPS 85
P01/D1
_DSRS _SQSS 86
P00/D0
_MSST MPXY 87
P107/AN7/KI3
MPXX 88
P106/AN6/KI2
_VCCL 89
P105/AN5/KI1
_PSS 90
P104/AN4/KI0
_MUDL 91
P103/AN3
_AVXL 92
P102/AN2
_VOXL 93
P101/AN1
94
AVSS P97/ADTRG/SIN4
_CTCL 95
P100/AN0 P96/ANEX1/SOUT4
96
VREF P95/ANEX0/CLK4
97
AVCC
_MSTB 98
_MDT 99
_MCK 100
_LTXD
_ _LTXD
_MCK
_MDT
18k
_CTCL
_VOXL
_AVXL
_MUDL
_PSS
_VCCL TDAT
AVXL AVXL
VCC VCC
C5922 100p
3V
R5924 220k
X5901
C5921 R5923
CR-567
5 0.1 100k
13 (9.8304MHz)
- 14
8V 12
+
4
R5925 R5927
IC7001
100k 220k
NJM2902M
VCC 102nS
3V
TKEY
_DSPS
_D96S
_COMS
R5804 1k PRES
R5805 1k PROS
R5806 1k ATTS Q5851 COMS
R5851
R5807 1k IPS 2SK3018
1k
R5812 1k NBS
R5814 1k FMS
R5815 1k FSKK
R5816 1k AGFS
IC5851
FMS SN74HCT244APW
1 20
ENA VCC
2 19
A1 ENB
DSPS 3 18 D96S
YB4 YA1
4 17
A2 B4
MODS 5 16
YB3 YA2
6 15 _MODS
A3 B3
MINH 7 14 AFS1
YB2 YA3
8 13 _MINH
A4 B2
AMS 9 12 AFS2
YB1 YA4
10 11
GND B1
AMS
R5962 10k
R5961 22k
50 _AMS
P42/A18
49 _FMS
P43/A19
48 _MODS
P44/CS0
47 _AGFS
P45/CS1
46 _FSKK
P46/CS2
45 PWRS
P47/CS3
44 _TDTS
P50/WRL/WR
43 _DAST
P51/WRH/BHE
42 PMST
P52/RD
41 PDST
P53/BCLK
40 PBST
P54/HLDA
39 _P2ST
P55/HOLD
38 MPXA
IC5901
P56/ALE
M30620MCM-1W4GP 37 MPXB
P57/RDY/CLKOUT
36 _RXS
P60/CTS0/RTS0
35 _TXS
P61/CLK0
34 _CRXD
P62/RXD0
33 _CTXD
P63/TXD0
32
P64/CTS1/RTS1
31
P65/CLK1
30
P66/RXD1
29
P67/TXD1
28 _ _LTXD
P70/TXD2/SDA
27 _LRXD
P71/RXD2/SCL
26 DPTK
P72/CLK2/
TA1OUT
POWER 13.8V: 12.5V
7.5V: 0V
IC5981
R3112N281A
1 5
OUT CD
2
VDD
3 4
VSS NC
1.88V
HV HV
VCC VCC
3V 3V
_POWS R6001 1k
_TPWR R6003 1k
_TDTS D6001 MA2S111 R6004 1k
_TOE R6006 1k
_PWRS R6007 1k
_MDT R6008 470
_MCK R6009 470
_TPHK R6010 1k
_TZK R6012 1k
_TGK R6013 1k
MCK3
MDT3
3V
3V
_B0
IC6101
R6151
BU4094BCF
1k
_MSTB R6102 1k 1 16
STR VDD
R6103 1k 2 15
D QE
R6104 1k 3 14
CLK Q5
_DRES R6105 1k BTH 4 13
Q1 Q6
B2 5 12
Q2 Q7
B3 6 11
Q3 Q8
B4 7 10
Q4 QS
8 9
VSS QS W6101
R6201
4.7k
3V
PCK
PDT
PMST
PDST
PBST
_P2ST
D6201
MA2S111
UNLK
3V
R6361 10k Q6201
SLOS R6362 1k DTC114EE
D6361
MA2S111
_2N23 R6301 1k
_2N80 R6302 1k
_2NTH R6303 1k
_2NOP R6304 1k
_RXS R6305 1k
_TXS R6306 1k
_KDS R6307 1k
RXS
2NTH 2NTH
8V
8V
Q6322 Q6342
2SB1132 2SB1132
D6321 D6341
MA2S111 MA2S111
R6322 R6342
1k 1k
Q6323 Q6343
Q6321 Q6341
2SK3018 2SK3018
DTC114EE DTC114EE
TX: 7.9V
RX: 0V
TX: 0V
_TIFS RX: 7.9V R6403 1k
_IDS R6404 1k
_TONE R6405 1k
_DRES
3V
IC6501
M62364FP
1 24
VIN1 VIN8
NBLV 2 23
VOUT1 VOUT8
8V COMV 3 22
VOUT2 VOUT7
3V COMI 4 21
VIN2 VIN7
5 20
VDD GND
_DAST 6 19
LD RESET
DPTK _MCK 7 18
CLK VDAREF
_MDT 8 17
DI D0
9 16
VIN3 VIN6
Q6471 DRIV 10 15
VOUT3 VOUT6
2SC4081
MIGV 11 14
VOUT4 VOUT5
12 13
VIN4 VIN5
BUS LINE1
14V
5V
T8L
T8V
8V
R8L
3V
POWS
TPWR
TDTS
TOE
PWRS
MDT3
MCK3
TPHK
TZK
TGK
DRES
B0
B5
B6
B7T
B7R
PCK
PDT
PMST
PDST
PBST MAIN
P2ST
UNIT
UNLK
(5)
OVDK
2N23
2N80
2NTH
2NOP
RXS
KDS
R8L
T8V
TIFS
IDS
TONE
POCV
AFGV
RFGV
BANV
HV
VCC
BUS LINE4
BUS LINE5
BUS LINE3