Icom IC-7400 Service Manual page 76

• MAIN UNIT (3/3)
R1700
R1701
R1703
ISTA _ISTA
ISTA
IKEY
_IKEY
IKEY
R1721
PWRK
_PWRK
PWRK
R1720
R1740
R1741
LFMD
LRXD
LFMD
LMFD
LTXD
LMFD
R1760
PWRS
_PWRS
PWRS
R1780
ANTS _ANTS
ANTS
UNSB
R1800 _UNSB
UNSB
NBS
R1801 _NBS
NBS
9K6S
R1802 _9K6S
9K6S
MODS
R1803 _MODS
MODS
FMS
R1804 _FMS
FMS
R1828
MR
R1820
AMS _AMS
AMS
R1821
PHFS _PHFS
PHFS
R1822
P50S _P50S
P50S
R1823
P2MS _P2MS
P2MS
R1824
2F3K _2F3K
2F3K
2F15 R1825 _2F15
2F15
MSL1 R1826 _MSL1
MSL1
MSL2 R1827 _MSL2
MSL2
D1840
R1841 D1841
OVDK _OVDK
OVDK
R1842
SKYS _SKYS
SKYS
RTKI R1843 _RTKI
RTKI
SENI R1844 _SENI
SENI
TRAS R1845 _TRAS
TRAS
RXS R1846 _RXS
RXS
TXS R1847 _TXS
TXS
_TRAS
R1860
SQLS _SQLS
SQLS
R1861
AFMS _AFMS
AFMS
R1862
SQL
Q1860
_SQSS
L1880
L1881
START R1880
TCON
START
KEY R1881
EKEY
KEY
ESTA
Q1880
Analog digital conversion line
Port related to FZTAT and,Reset controll circuit
Other connections with 001.sht
_ASL
_H5VL
IC1500
C1500
103 AVCC
104
VREF
_ASO0 105
P40/AN0
_ASO1 106
P41/AN1
_ASO2 107
A42/AN2
_FMTL 108
P43/AN3
109
_VOXL P44/AN4
110
_AVXL P45/AN5
111
_STON P46/AN6/DA0
112
_BEEP P47/AN7/DA1
C1501 113
AVSS
114
VSS
_MODS 115
P17/PO15/TIOCB2
EKEY 116
P16/PO14/TIOCA2
TCON 117
P15/PO13/TIOCB1
ESTA 118
P14/PO12/TIOCA1
119
_FMS P13/PO11/TIOCD0
120
P12/PO10/TIOCC0
121
EDT P11/PO9/TIOCB0
ECK 122 P10/PO8/TIOCA0
123
MD0
124
MD1
C1502
FZMD 125
MD2
126
PG0/CAS
127
PG1/CS3
C1503
128
PG2/CS2
_RXS
_TXS
CP1581
CP1582
CP1583
SDA VSS
5 4
SCL A2
6 3
WP A1
7 2
VCC A0
8 1
IC1580
C1580
IC1560
1 5
OUT CD
2
VDD
3 4
VSS NC
RESET
R1562
19.6608MHz
X1500
_NSQL
_H5VL
_SBSY
64
P35/SCK1
63
P34/SCK0
62
P33/RXD1
61
P32/RXD0
60
P31/TXD1
59
P30/TXD0
58
VCC
57
_DRQW
PD7/D15
56
_DWBY
PD6/D14
55 _DCK
PD5/D13
54 _DDTW
PD4/D12
53
VSS
52 _DRQR
PD3/D11
51 _DDTR
PD2/D10
50 _DRBY
PD1/D9
49 _DSTR
PD0/D8
48 _DCBY
PE7/D7
47
_CTFL
PE6/D6
46 _TOFF
PE5/D5
45 _RTDT
PE4/D4
44
VSS
43 _VSQL
PE3/D3
42 _DSST
PE2/D2
41 _DSKY
PE1/D1
40 _ANTS
PE0/D0
39
VCC
C1512
_H5VL
Port related to PLL,RF and FILTER
MCK
MDAT
5VL_
_FMTL R1902
FMTL
_VOXL R1903 VOXL
R1904
_AVXL AVXL
R1905
_ASO0 ASO0
_ASO1 R1906 ASO1
_ASO2 R1907 ASO2
_ASL
C1908
IC1900
VCCL 1
Y1 VDD
REFL 2
Y0 Y
DPTL 3
Z1 X
_STON 4
Z X1
_BEEP ALCL 5
Z0 X0
6
INH A
7
VEE B
8
VSS C
HW1908
R1909
5VL_
R1921
MCK
_SSTB R1922
J1920
MDAT R1923 MDAT_UT
1
R1924 SBSY
_SBSY
3
5
7
9
5VL_
R1943
5VL_
C1940
Q1940
W1940
IC1940
CBSY
FZRX 8 1
CRXD 7 2
FZTX CTXD 6 3
5 4
C1511
_DCK
_DDTW
_DDTR
_DRQW
_DRQR
_DSTR
_DWBY
_DCBY
_DRBY
5VL_
_DSKY R1985
_DSST R1986
_CTFL R1987
_RTDT R1988
_TOFF
R1989
_VSQL
R1990
_NSQL
R1991
CBSY
_UNLC
L2020
H5VL
5VL_
BSTB
FSTB
ASTB
IC2040
1
2
3
L2060
MCK MCK
MDAT
MDAT
5VL_
5V
H5V
L2061
NOTICE: Refer to the PARTS LIST for the value and name of each component.
12 - 6
HV
FMTL
VOXL
AVXL
FORL
FORL
REFL
REFL
ALCL
ALCL
16 THML_
THML_
15 VCCL
VCCL
14 DPTL
DPTL
13
THML_
12
FORL
11
10
9
STON
STON
BEEP
BEEP
MCK_UT
SSTB
SSTB
2
MCK_UT
4
SPCE
6
8
1 0
SPCH
SPCH
R1945
CIV
CIV
Q1941
R1944
W1941
CIVE
R1964 DCK
DCK
R1965 DDTW
DDTW
R1966 DDTR
DDTR
R1967 DRQW
DRQW
R1968 DRQR
DRQR
R1969 DSTR
DSTR
R1970 DWBY
DCBY DWBY
R1971
DCBY
R1972 DRBY
DRBY
DSKY
DSKY
DSST
DSST
CTFL
CTFL
RTDT
RTDT
TOFF
TOFF
VSQL
VSQL
NSQL
NSQL
PCK
PCK
PDAT
PDAT
CON2
CON2
PST1
PST1
PST2
PST2
PST3
PST3
PST5
PST5
D2000
UNLC
UNLC
BSTB
FSTB
ASTB
R2042
DRES
DRES
5
4
MCK
MDAT
5V
H5V