![background image](http://html2.mh-extra.com/html/icom/ic-7851/ic-7851_servise-manual_4153040163.webp)
9-20
RF-B UNIT (RF-B-1)
270
R1003
100
R1008
AGC
82P
C1358
FTR-B4CA009Z
RL1452
AGCDET
LR-454
L1453
33P
C1507
LR-443
L1156
15P
C1553
18P
C1503
LR-457
L1556
J1001
27U
L1451
33P
C1511
27P
C1157
180P
C1156
1K
R1909
220P
C1402
47P
C1465
LR-454
L1455
27P
C1306
390P
C1265
82P
C1408
0.001
C1165
180P
C1452
560P
C1214
1K
R1906
47U
L1401
56P
C1656
1K
R1905
56P
C1211
FTR-B4CA009Z
RL1002
FTR-B4CA009Z
RL1302
FTR-B4CA009Z
RL1251
LR-453
L1555
150P
C1312
FTR-B4CA009Z
RL1301
27P
C1161
47U
L1151
47P
C1458
LR-457
L1552
1K
R1907
LR-445
L1202
18P
C1463
FTR-B4CA009Z
RL1352
HF_RX
560P
C1264
33P
C1509
50M_RX
82P
C1260
33P
C1407
22P
C1557
33P
C1263
LR-451
L1406
33P
C1406
LR-453
L1553
LR-445
L1206
FTR-B4CA009Z
RL1202
470P
C1801
47P
C1453
18P
C1512
FTR-B4CA009Z
RL1151
FTR-B4CA009Z
RL1052
33P
C1361
LR-455
L1502
100P
C1362
330P
C1162
12P
C1555
150P
C1303
330P
C1314
LR-453
L1554
LR-446
L1205
22P
C1355
LR-455
L1506
68P
C1654
12P
C1561
180P
C1254
15P
C1456
LR-451
L1402
FTR-B4CA009Z
RL1652
LR-444
L1154
FTR-B4CA009Z
RL1351
2.2U
L1651
56P
C1206
FTR-B4CA009Z
RL1601
18P
C1514
220P
C1413
LR-446
L1204
0
R1051
150P
C1315
33P
C1410
MMZ1608Y102BT
EP1803
2.2U
L1601
220P
C1353
10P
C1510
LR-446
L1203
7P
C1558
560P
C1252
56P
C1259
33P
C1504
6.8U
L1551
18P
C1505
MMZ1608Y102BT
EP1802
47U
L1051
LR-452
L1405
470P
C1802
120P
C1310
330P
C1215
82P
C1257
LR-458
L1253
120P
C1258
47P
C1405
MPZ2012S601A
EP1805
56P
C1652
47K
R1052
10U
L1501
LR-458
L1255
MPZ2012S601A
EP1801
FTR-B4CA009Z
RL1051
LR-452
L1404
3.3U
L1102
330P
C1158
330P
C1208
3.3U
L1104
FTR-B4CA009Z
RL1551
100P
C1552
18P
C1455
0.1
C1901
120P
C1502
3.3U
L1103
LR-452
L1403
8P
C1459
100P
C1562
3.3U
L1105
0.1
C1902
47P
C1508
LR-449
L1352
33P
C1356
120P
C1307
120P
C1155
10P
C1309
47P
C1462
15P
C1261
LR-453
L1456
LR-449
L1356
47P
C1412
33P
C1255
HFDW
LR-450
L1355
FTR-B4CA009Z
RL1152
HPRE
VPRE2
100P
C1354
68P
C1403
VPRE1
22P
C1554
330P
C1207
HPRE2
HPRE1
LR-448
L1305
LR-450
L1354
0.1
C1903
VPRE
39P
C1360
HF3V
220P
C1352
IFM
0.001
C1152
390P
C1253
IFW
LR-447
L1302
27P
C1305
FTR-B4CA009Z
RL1001
330P
C1212
IFN
47U
L1251
LR-450
L1353
220P
C1365
LR-447
L1256
560P
C1202
IFSN
47P
C1209
22P
C1363
LR-458
L1254
FTR-B4CA009Z
RL1003
LR-453
L1452
0.001
C1164
150P
C1304
15P
C1256
22P
C1556
22P
C1359
FTR-B4CA009Z
RL1402
15P
C1461
330P
C1203
LR-456
L1504
LR-447
L1306
FTR-B4CA009Z
RL1451
15P
C1563
220P
C1364
FTR-B4CA009Z
RL1102
150P
C1308
LR-444
L1153
22P
C1460
FTR-B4CA009Z
RL1252
LR-447
L1252
FTR-B4CA009Z
RL1502
330P
C1204
47U
L1301
47K
R1101
120P
C1513
27P
C1313
47P
C1159
FTR-B4CA009Z
RL1552
47P
C1411
LR-448
L1303
+15V
FTR-B4CA009Z
RL1501
330P
C1210
39P
C1357
LR-443
L1152
FTR-B4CA009Z
RL1201
120P
C1163
33P
C1409
+15V
39P
C1205
LR-456
L1503
22P
C1560
330P
C1302
330P
C1154
-12V
39P
C1213
180P
C1262
0
R1102
LR-448
L1304
LR-456
L1505
FTR-B4CA009Z
RL1004
47P
C1404
47U
L1201
180P
C1464
FTR-B4CA009Z
RL1602
180P
C1160
27P
C1311
FTR-B4CA009Z
RL1651
LRB706F
D1801
39
R1005
68P
C1414
FTR-B4CA009Z
RL1101
18
R1002
47U
L1351
22P
C1457
10P
C1506
FTR-B4CA009Z
RL1401
HF3V
150
R1004
LR-454
L1454
22P
C1559
150
R1006
47U
L1101
LR-444
L1155
82
R1007
VHFDW
270
R1001
47P
C1454
0.001
C1153
82
R1009
8.2U
L1053
8.2U
L1055
0.01
C1004
0.01
C1003
0.01
C1002
0.01
C1001
0.01
C1058
0.01
C1051
0.01
C1101
0.01
C1106
0.01
C1151
0.01
C1166
0.01
C1216
0.01
C1201
0.01
C1251
0.01
C1266
0.01
C1301
0.01
C1366
0.01
C1351
0.01
C1316
0.01
C1401
0.01
C1415
0.01
C1466
0.01
C1451
0.01
C1564
0.01
C1501
0.01
C1551
0.01
C1515
0.01
C1658
0.01
C1601
0.01
C1651
0.01
C1804
0.01
C1805
0.01
C1803
0.01
C1806
SN74AHC595PW
IC1901
1
QB
2
QC
3
QD
4
QE
5
QF
6
QG
7
QH
8
GND
9
QH'
10
SCLR
11
SCK
12
RCK
13
G
14
SI
15
QA
16
VCC
SN74AHC595PW
IC1902
1
QB
2
QC
3
QD
4
QE
5
QF
6
QG
7
QH
8
GND
9
QH'
10
SCLR
11
SCK
12
RCK
13
G
14
SI
15
QA
16
VCC
SN74AHC595PW
IC1904
1
QB
2
QC
3
QD
4
QE
5
QF
6
QG
7
QH
8
GND
9
QH'
10
SCLR
11
SCK
12
RCK
13
G
14
SI
15
QA
16
VCC
0.1
C1914
SN74AHC595PW
IC1905
1
QB
2
QC
3
QD
4
QE
5
QF
6
QG
7
QH
8
GND
9
QH'
10
SCLR
11
SCK
12
RCK
13
G
14
SI
15
QA
16
VCC
0.1
C1915
0.1
C1916
0.1
C1917
22
R1922
22
R1919
22
R1920
22
R1923
22
R1925
22
R1921
22
R1924
22
R1926
22
R1930
22
R1928
22
R1934
22
R1931
22
R1932
22
R1933
22
R1927
22
R1929
0.01
C1606
22
R1913
22
R1912
22
R1917
22
R1910
22
R1916
22
R1911
22
R1914
22
R1915
J1701
0.01
C1701
FTR-B4CA009Z
RL1701
J1702
MIX1V
VHF3V
1K
R1908
1K
R1902
VHF3V
+11V
J1801
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
22
R1805
22
R1807
22
R1804
22
R1806
CP1801
CP1805
CP1807
CP1812
CP1808
CP1809
CP1803
CP1806
CP1804
CP1802
CP1810
CP1811
1K
R1901
1K
R1904
0.01
C1807
MPZ1608S601A
EP1806
MPZ1608S601A
EP1804
MPZ1608S601A
EP1807
MPZ1608S601A
EP1808
8.2U
L1054
8.2U
L1052
0.01
C1057
0.0047
C1056
0.01
C1055
0.01
C1054
0.01
C1052
0.0047
C1053
0.0022
C1105
0.0022
C1102
0.0012
C1104
0.0027
C1103
180P
C1602
5P
C1603
54N
L1604
54N
L1602
0.88U
L1603
0.27U
L1654
0.27U
L1652
0.22U
L1653
+11V
1K
R1801
62783G
IC1903
1
I1
2
I2
3
I3
4
I4
5
I5
6
I6
7
I7
8
I8
9
VCC
10
GND
11
O8
12
O7
13
O6
14
O5
15
O4
16
O3
17
O2
18
O1
62783G
IC1906
1
I1
2
I2
3
I3
4
I4
5
I5
6
I6
7
I7
8
I8
9
VCC
10
GND
11
O8
12
O7
13
O6
14
O5
15
O4
16
O3
17
O2
18
O1
62783G
IC1907
1
I1
2
I2
3
I3
4
I4
5
I5
6
I6
7
I7
8
I8
9
VCC
10
GND
11
O8
12
O7
13
O6
14
O5
15
O4
16
O3
17
O2
18
O1
68N
L1001
18P
C1005
5P
C1608
180P
C1604
B7
B5
B6
B4
B3
B2
B0
B11
B10
B9
B8
ATT3
ATT12
B1
ATT6
MCK
STBRF
VHF
ATT12
ATT6
ATT3
B11W
HPRE
VPRE2
VPRE1
HPRE2
HPRE1
VPRE
HF3V
IFW
IFM
IFN
IFSN
HFDW
VHFDW
MDAT
STBRF
MCK
STBRF
RESH
IFN
IFM
IFW
HF3V
B11W
+15V
B8
B9
B10
B11
DIGI
HF3V
MIX1V
VHF3V
VHF3V
DIGI
VPRE2
HPRE2
VHF3V
RESH
MCK
RESH
MDAT
VPRE1
HPRE1
IFSN
HFDW
VPRE
HPRE
VHF
VHFDW
MIX1V
B0
B1
B2
B3
B4
B5
B6
B7
B1
B2
B3
B4
B5
B7
B8
B9
B10
B11
B11W
B0
RF-B-2
RF-B-3
-12V
MIXBV
RBSTB
MCK
MDAT
RBAGC_DET
+15V
+11V
RBAGCV
DRESH
+3R3V
+11V
+11V
+11V
+11V
+15V
B6
[RXB]
TO CONNECT J202
TO DIGISEL-B J2
[RFINB]
[RFOUTB]
TO DIGISEL-B J1
TO DSP J61
GND
GND
NC
GND
NC
Selected 8.58 V
*:
Refer to the PARTS LIST for the value and name of component.