Main Unit - Icom IC-R75 Service Manual

8-5 MAIN UNIT

C1295
2 8
J1271
from optional unit UT-102
1 7
J1521
2
1 AFO AFO
ESPO ESPO
ISPO ISPO
to LOGIC board J501 AFE AFE
5V GND
8V GND
14V HVR
15 H5V BATT 16
J1561
1 RFGV AFGV 2
SML FMNL
EMTI SALI
BEEP RECS
to LOGIC board J541
SQLS AGRS
RXS SBSY
SPST GND
CIV CIVE
15 16
J1541
1 2
PWRC DSPS
DINT DSTB
PSTB ISTB
to LOGIC board J521 ASTB MDAT
MCK DRES
PDAT PCK
PCO2 PST1
15 PST2 PST3 16
2 16
J1501
to PLL unit J2
1 15
J1221
L1291
IC1291
C1293
C1294
C1296
R1258 R1259
AFE
C1292
DAFO
R1293
C1261
C1262
R1256 C1253 R1252
R1281
C1281
R1251
C1255 R1253 C1251
C1260
R1257 R1255
C1256
C1202
C1217
C551
C1216
IC1201 IC1211
C1215
C1201 R833 C1024
C552
C831
R1021
C1008
X1001
R1272 C1272
J1271
R1006 C562
C1007
C1009
R2011
R1084
C2012
C1090 C1101 C2011 IC1001
C1089 C1102 R2012
R1082 R1108
C2015
C2014
R1003
R2001
Q1031
R2051
C1010
R1001
R1081 C1085 R1101
C2021 R2021
R1008
C1521 Q2021
BFO C2022
J1081
R897 L892
C913
C896 R896
R912
R914
Q891
FI871
C892 R892
C891
C914 C893
R891 FI861
R893
C872
C862 R864
D852 R854 C852
R865
R875
R861 R871
R862 R872
R765
C762 R764
R851
R853
R841
R818
R821
J784
R885
R814
R813
D881
R812
R816
R817
R801
C881
R882
Q801
C816
C801
R824
J1501
3LO
8 - 7
10 2
J1231
from optional unit
4
UT-106
1
9 1
R1351
D1371 R1374
R1236 R1235 R1233 R1231
D181 D221 D261
J1231 C301
C181 C201 C221 C241 C261 C281
L301
L181 L221 L261
C1231 R1234 R1232
C202
C223
C182
C222 C262
L202
R571
C225 L242 L282
R563
R572
R564
L303
L223 L263 C282
R573 C242
R565
R574
C304
R566 C184 C204 C224 C263
R575
C185 C205 C226 C264
R567
R576 C305
R568 C206 C227
L183
R577
C207 C228
R569
R578
C246 C288
R570 C186
C307
C269
C561
L225
L265
R587
R579
L205
R588
C230 R261
R580 C188 L245 L285
R589
R201
R590 C248 R241 C290 R281
C209
R591
R583
R592
R593
C385
C434 L431
Q383
J1522 C433
C432
R386
C435
C436 D382
L401
L385
R392
R385 C396
C393
R384 R394
C397
D392
C395
D372
C412
C414
R444
R445
C424
C444
L412
L442 L422
R1068 R446
C1061
C1051
R1067
C461
C445
D872
L444
R874 D1051
R1053
IC1601
IC1602
R1052 R1064
L461
C1066
C448
L443
C1065
C1067
R1066 R1063
IC1603
R1062
Q1063
Q1061
CP731
R745
C1063
FI761
R744
Q736
Q735
R746
Q737
R749
C742
R750
R782
C781
J783
C734
J782 J781
R723
R795 R792
C722
R773 C726
R771 R772
C773
R722
R725
IC1371
C1374
C1372 C1373 C1352
D1351
R1371
F1351
FUSE 3A
F1353
F1352
C163
D341
D301
Q151
C133
C321 L163
L151 C132
L341
L161
L131
C333 C341
C322 C135 C131
R142
C134
C342 C151 R141 C136
L322
C170
L343
C324
C344
C303
C345
L171
C327
L324
L304 C171
C328
C172
C329 L173
L345
C175
C350 C174
C176
R171
L326
R173
C141 R143 R144 C121
R321 C352
C111
R112
L361
L382
Q382
R361
J111
C1361
C1363
Q381
C1365
C392 D391 R362
C394
R391
D371
L391
L381
L392
C1392
Q391
C1394
C411
R1382
L413
R1381
D1381
FI461 R1311
R471
R473
Q472 C1413
L462
C1312
C476
R1415
R478
R1411
C475
IC1411
C462
L732
C1414 C1415
C1416 C1419
L1321
R741
Q733
R739
C737
C1421
L733
R492
C735
R735
R491
R732
C732
D1771
C1753 C1752
D491
Q1772
C492
R1771
C731
R731
IC1751
Q1771
R1773
R1774
C1755 C1751
C1756
L1771
C701
C1402
C1401
FI701
C1404
C1403
[DC 1N]
J1351
(450 Ω)
[ANT2]
C101
(GND)
[MUTE]
[EXT SP]
[REMOTE]
[RS-232C]