Icom IC-7400 Service Manual page 77

• RF UNIT (1/2)
U L P P C P
L D D C O S
D R A K N T
S T 1
2
CLK
MP1101
DDS
R1136
R1137 R1149
MP1103
R1147
R1148
R1101
R1150
R1102
C1114
R1103 C1113
L1101
R1104
R1105
1
0 9 9 9 9 9 9 9 9 9 9 8 8 8 8 8 8 8 8 8
C1115 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1
R1106
V D C V B V C C C S V V S V V B B B V B
R1107
D A O S U S O O O T S S Y D S U U U D U
C1101 S S S N N N R S S S D S N N M D N
C D T N
L A T Y 0 1 2 B 4 2 2 4
_
K C O O O I
R1108 C1102 1
VSS L C
2 L
SYSCLKO K
R1109 K
3
VDD
4
VDD
5
VSS
R1110 6
DA0
7
DA1
R1111 8
DA2
9
DA3
R1112 10 IC1101
VSS
11
DA4
12
DA5
R1113 13
DA6
14
DA7
R1114 15
VSS
16
VSS
17
DA8
R1115 18
DA9
19
DA10
20
DA11
R1116 21
VDD
22
TE1
R1117 23
C1103 TE2
24 S
TE3
T T T T T Y
25
VDD
C1104 E E E E E S
R1118
O O O O O R
U U U U U E O O O
V V V T T T T T V V S V V S V S V V S V
R1119
S S D H H H H H D D E S D C S C D S C S
S S D 0 1 2 3 4 D D T S D I S F D S O S
R1120 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4
6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
R1121
R1122
R1123
R1124 C1105 C1107
C1108
C1106
C1116
FI1101 C1117 R1127 R1128
R1133
R1129
Q1101
C1120
R1125
R1130
CP1102
C1118
R1134
5V
8V
C1075
8 5 C
V V L
K
MP1301
Sub Loop
R1301
CP1007
C1301
C1303
CP1008
CP1006
CP1005 CP1009
D1301
CP1004 CP1010
8 5 C CP1003 CP1011 C1302
V V L
K CP1002
CP1001
8V
5V
R1020
J1001
CON2 CON2 CON2
1
PCK PCK PCK
2
PDAT PDAT PDAT
3
PST5 PST5 PST5
4
PST4 PST4 PST4
5
PST3 PST3 PST3
6
PST2 PST2 PST2
7
PST1 PST1 PST1
8
LDRS LDRS LDRS
9
GND GND
10
UNLC UNLC UNLC
11
GND GND
12
GND GND CP1012
13
5V 5V C1010
14
5V 5V
15
CP1013
GND GND
16
8V 8V
17
8V 8V
18
GND GND
19
14V 14V CP1014
20
14V 14V
21
FCNT FCNT
22
C1002
TO MAIN
C1004
R1000
R1002
R1003
R1004
R1005
R1006
C1003 R1007
C1001 R1008 R1012 R1014 R1016 R1018
R1009
R1015 R1017 R1019
R1011 R1013
EP1010
D
P D D M F F F
I
A B U K A A A
F L L R N N N V
O
S S S S H M L
U
_
T
MP1102
VCO
MP1201
R1151
R1152
R1153
R1154
R1139 R1155 C1203
R1202 L1201
R1140 R1156
R1157
C1122 C1161
C1204
Q1103 C1162
C1202
L1203
C1163
C1209
C1164
C1165 D1201
C1166
C1208
8 7 7 7 7
C1167
0 9 8 7 6
C1141
L1221 C1223
B B V V V R1222
HC1168
U U D S S
N M D S S
2 2
C1224
I I
ETCO0 75
ETCO1 74
ETCO2 73
C1222
L1223
VSS 72
ETCO3 71 C1229
ETCO4 70
VSS 69
ETCO5 68 R1159 D1221
ETCO6 67
ETCO7 66
VSS 65
C1112
C1228
VDD 64
Q4MA 63
C1243
R1242 L1241
Q16MA 62
VSS 61
FCK 60
C1244
RC 59 IC1102
REF_OSC 58 5
VDD 57 1
C1155 L1243 C1242
PDTRI 56 4
VSS 55 2 C1249
PD0 54
VDD 53 3 C1191
C1111
PD1 52
PD2 51
D
R I
P E V R1135
C1248
D F V O V
I I S U D
C1263
N N S T D R1262 L1261
C1110
4 4 4 4 5
6 7 8 9 0
R1142 CP1101
R1138 C1264
L1263 C1262
C1109
C1151 C1269
L
C1131 K D1261
A
V C1268
C1121
R1144
R1132
4
V
C1119
_
V
C
O
Q1102
8V
L1281
R1281
L1051
Q1051
R1051
C1281
C1282
C1053
R1052
C1051
C1052
MP1302
R1303
R1304
C1305 R1308
R1305 C1307
HR1314
C1306
R1309
Q1301 C1312
R1310
R1312
R1307
C1310
C1304 D1302
C1308
L1301
R1311
C1311
L1302
C1309 Q1302
D1303
R1302 R1306
5V_CAL
C1031
R1905
C1905
R1031
R1906
L1901
C1908
Q1901
R1032
X1901
EP1031
CAL
R1908
X1902
C1909
R1904
D1901 C1904 C1906
R1924
C1931
C1927
C1032
R1907
5
V
R1919
R1033
L1908
14V
MP1901
D1004
ULD
DULS
D1003
Q1003
4 3
ULP 5 2
UNLC 6 1
12 - 7
8V
5V
C1427 L1401
MP1202
x2
MP1401
C1206
R1407
L1204
L1202 V1AS
L1402 D1401
R1203 HC1210
C1211
Q1201 R1204 D1403
EP1201
C1207 L1403
C1205 W1406
Q1202
W1403
C1226
R1402
L1224
L1222 V2AS
R1223 HC1230
Q1221 R1224 EP1221
C1410
C1231
C1227
C1225
Q1222
VCO3
C1246 EP1242
L1244
EP1241
L1242 V3AS
R1243
W1405
Q1241
R1244 C1251
C1247
C1245
Q1242
C1266
L1264
L1262 V4AS
R1263
HC1270
C1271
Q1261
R1264 R1025
EP1261 R1026
Q1262
V1S R1027
C1265 V2S
V3S
C1267
V4S
C1011
C1014
C1012 C1013
PLL
MP1801 MP1802
L1806
C1806
C1284
R1282
C1292 L1802
C1819
C1818 C1820
Q1281 C1803
L1801
C1293
C1291 C1816 IC1802
R1809
1 VCC 8
IN C1814 D1801
2 GND 7
GND
R1810 3 GND 6 C1802
GND
4 OUT 5
GND
R1283
C1804
L1291
C1805
R1808
R1824
R1823
R1284 R1802
C1801
IC1051
5V_PLL
Q1801
4 3
5 2
6 1
C1817
C1054 C1055 C1057 C1059
HC1815
R2004 C2004
R1923
R1911 R1914
L1905
W1902
R1909
C1926 R1915 R1916
L1902 C1916
C1917
R1913
C1919
Q1902 Q1904
R1922
R1917
C1918
R1910
R1912
Q1903
R1918
MP1902
MP1402
Q1521
4 3
5 2
C1409
R1405
L1406
6 1
W1407 W1408
C1411
R1418
C1408
R1417
Q1401
R1419
R1404
R1406
R1403
DBLS
L1408
D1505
Q1402
EP1401
Q1561
4 3
5 2
R1416
D1402 6 1
W1404
C1412
L1410
C1425
C1426
C1428 C1423
C1424
C1422
Q1581
4 3
L1412
5 2
6 1
IC1001
1 VDD 16
5V
STRB
2 OENA 15 LOF4
DATA
3 Q5 14 LOF1
CLK
4 Q6 13 LOF2
Q1 MP1601 MP1602
5 Q7 12 LOF3
Q2
6 Q8 11
Q3
7 Q'S 10
Q4
8 QS 9
5V
VSS
C1008
L1601
PCK R1621
PDAT LDRS
PST5
CP1801
C1603
C1604
PST3
HC1813
PDAT
L1804
PCK
IC1801
R1805 1 VDD 16 R1622
OSCIN C1605
2 V 15 R1623
OSCOUT
R1818
C1807 3 R 14 R1624
REFOUT
4 PDOUT 13
FIN
5 VSS 12
DIN
6 LD 11
ENB
7 FV 10 R1806
R1803
CLK R1817
8 FR 9
DOUT
C1809
C1858
L1805
C1630
C1856 HC1808 C1810 C1811
C1857 R1632
HR1804
CLK
C1812
R1822
R1820
5 C
V L
K
ULP
PCK
PST2
PDAT
R1821
PAFS_
R2005
FANL P1901 EP1081
MKRS
Q2003
DIVOUT
R2006
EP1082
FANM
Q2004
W2001
FANH
Q2005
EP2
C2005
C1928 2LO
C1921
C1923 L1904
C1925
L1903
C1924 J1901
C1922
C1920
NOTICE: Refer to the PARTS LIST for the value and name of each component.
C1503
CP1500
MP1501 MP1502
1LO
LO FILTER
R1521
EP1501
EP1502
HR1522 R1524 C1520
C1521 C1522 C1524 C1531 L1522
L1523
L1521
C1526 108 - 176 MHz
R1501
L1530 C1528
C1523
C1530 C1525 C1527
C1529 D1503
C1501
C1502
1LO
R1506
0.03 - 29.999999 MHz
L1561 L1562 L1563
R1562
R1561
C1565
C1563
C1561
C1562
C1564
D1504
D1502 C1567
1 4 3 2
L1581 L1582
L1583
2 3 4 1
30 - 60 MHz
C1583
L1584
R1502 C1585
C1582
C1586
R1581
R1582 C1584
C1587
C1581
P1601
1
2
W1606 W1607
MP1603
J1601
C1601
C1608
C1602
R1601 R1602
1
2
R1603 R1604
3LO
3 3 3 3 2 2 2 2 2 2 2
3 2 1 0 9 8 7 6 5 4 3
R1605 R1606
I Q P P P V V R R V D
D D D D S E O D A
M M M D S S M D 9
R1607 R1608
2 1 0 E C W1604
34 DA8 22
VSS
35 T E DA7 21
UL
36 DA6 20
P1 R1609 R1610
37 IC1601 DA5 19
TREE
38 VSS 18
P2
39 DA4 17
VDD
R1611 R1612
40 DA3 16
VSS
41 DA2 15
STRB
42 DA1 14
DATA R1613 R1614
43 S DA0 13
CON_CLK Y
44 VSS 12
VDD S
U
F F E E _ C N N
R1615 R1616
V S S T T V N U U V
S K K C C D L M M M D
S 1 0 0 1 D K 0 1 2 D
R1617 R1618
1 2 3 4 5 6 7 8 9 1 1
0 1
R1619 R1620
C1607
R1626
C1617
L1602 L1603 HL1604 C1615
R1627 W1601
C1610 W1605
L1605
C1606 C1612
C1616
Q1601 C1609 C1611 C1613 R1630
R1081 C1081
CP1081
MKR
5
1 R1082
W1081
4 W1082
MKR
2
3 C1083
IC1081
C1082