Icom IC-R75 Service Manual page 47

ESPO
ISPO
D372
MA77
PREAMP 1: 13.5 V
PREAMP 1: 9.7 V
D382
C384
MA77
0.1
Q383
XP4311
R386
L384
330 µH 100
4 3
C385 5 2
0.1
6 1
9.4 V
D392
MA77
R401 L401
330 µH
470
4 3
C401
0.1
5 2
PREAMP 2: 7.7 V
6 1
Q391
XP4311
2IF
1.1 V AGC
R8V
C411 14V
R411 L411
0.22 µH 8V
39 P 68
1LO
5V
R413 MCK
560 MDAT
RSTV
GND
L443 C448 D1311
LS-483A 100P 1SS355
L1311
220 µH
6.6 V
C1311
0.01
R447 L444
C447
10 µH
47 0.1
R448 R449
470 100
L471 L1321
C475
LS-484B
HF50ACC322513
12 P
7
C476
0.0047
R479
47
AGC
D491
L492
HSB88WS LR-317
2IF
C492
68P
13.8 V
R8V
14V
8V
5V
C1371
MCK 2.2
MDAT
RSTV
8 V
F1351 L1411
220 µH
FGB 3A
D1351 C1352 R1411
DSA3A1 0.01 R1351
100
10
C1353
470
R1415
100
13.8 V
C1411 C1412
0.1 47
C1361
2.2
2.7 V
L701 FI701 L711
L712 C721
D711 R713 D713
LS-452 FL-23 LS-452 LS-452
MA77 220 MA77 0.0047
2IF
C701 D714 R722
D712
27 k
2 P MA77 MA77
C711
0.0047
R711
2.2 k C712
R712
0.0047
R721
2.2 k
4.7 k
AGC
R8V
IC731
7.8 V 3.3 V
LA1150N
Q733
Q731 L731
1.8 V
0 V
R732
LS-466 2SC4081 R
2SK882 GR 1 2 3 4 5 6 7 8
4.7 k
C735
1.0 V 0.0047
R737
Q732 R739
R734 R735 47 k
47 k
R731
R733 100 22 k 2SA1576 R
100 k
100
C733
C734 R738 C736
R736 0.0047 0.1 0.0047
47 k
10 k
1.3 V
C731 C732
8V
0.0047 0.0047
L733
220 µH
7.7 V
IC1601
BU4094BCFV
16
ASTB 1 4
STR. Q1
MDAT 2 5
D Q2
MCK 3 6
CLK Q3
15 7
OE Q4
14
Q5
13
Q6
12
Q7
11
Q8
C1601
9
0.1
QS
10
QS
R1311
8
4.7 k
0 V
R1314
47 k
EMTI
R1312
33 k
Q1311
C1312
2SC4081 R 0.01
AGC
R8V
14V
0.6 V 8V
R1313
5V
15 k
R8V
14V
AFO
ESPO
Q1381
C1321 12.8 V
8.0 V
AFF
0.01 R1381 2SD1664 Q
47 k
D1381
ISPO R1382
1SS302
2.2 k
Q1382
DTC114EU
RXS
8.6 V
8.0 V
C1381 C1382
0 V (MUTE: 4.4V)
0.1 0.1
PWRC IC1391
Power On: 0 V
TA7808F
Power Off: 2.4 V R1374 I O
4.7 k
D1371 G
C1391 C1392 C1393 C1394
1SS355 10 0.1 0.1 10
IC1371
C1376
PQ30RV31 1
R1372 13.6 V 11.8 V 5.0 V
1 2 3 4
R1401
47 k
IC1401
14V 12
TA7805F
I O
G
C1372 C1401 C1402 C1403 C1404
0.1 R1371 10 0.1 0.1 10
4.7 k
C1373
0.1
C1374 C1375
0.1 470
10.0 V
0.5 V
0 V
160 µs
11.0 V _
D1412
R1412 5.3 V
1SS302 R1414
8 GND 1
10 k VCC
100
7 TRG 2
DISCHARGE
6 OUT 3
VTH
R1413
5 VCONT RESET 4
100 k C1417
47
IC1411
R1416
µPC1555G2 C1418 100 D1413 C1419
47 MA8051 M 0.1
IC1361
AN78L05M
C1415 C1416
C1413 C1414 5.0 V
0.01
0.1 22 0.001
I O
C1362
G
0.1
C1364 C1365
C1363 0.1 10
0.1
7.2 V
C724 L721 C726
22 P 10 µH 0.0047
Q721
3SK131 MAS
1.0 V
1.2 V
R723 R725
470 k 100
C722 C725
C723 R724
0.1 0.1
0.0047 150
7.6 V 1.3 V 0 V 7.4 V
2.8 V
CP731
L732
HK3-S-T
R741 R743
LS-466
Q735
47 k
4.7 k
2SC4081 R
C738
D731
150P
1SS375
R744 R746
R747
4.7 k 6.8 k Q736
1 k
R742
DTC114EU
100
Q734
R740 C737 0 V C739 R745 C740 C741
2SC4081 R
1 k 0.1 22 100 k 22 P 47
IC1602 IC1603
4.8 V 4.8 V 6.7 V
BU4094BCFV TD62783AF
16
AFS1 ISTB 1 4 2S3K 1 18 2F3K
STR. Q1 IN1 O1
AFS2 MDAT 2 5 2STH 2 17 2FTH
D Q2 IN2 O2
AFMS MCK 3 6 2SOP 3 16 2FOP
CLK Q3 IN3 O3
AGFS 15 7 3S3K 4 15 3F3K
OE Q4 IN4 O4
AGSS 14 3S6K 5 14 3F6K
Q5 IN5 O5
AGOS 13 3S15 6 13 3F15
Q6 IN6 O6
NBS 12 3SOP 7 12 3FOP
Q7 IN7 O7
NBLS 11 SAMS 8 11
Q8 IN8 O8
9 10
C1602 VS GND
9
0.1
QS
10
QS C1603
0.1
8
_ 5V
16
13 X0 12
X
14
X1 IC1281
3 15
Y X2
BU4052BCFV
11
X3
1
Y0
5
Y1
2
Y2
4
Y3
6
INH
A 10 R1272
9
MDAT 1 k
B
BUSY
8 7
R1271
C1271
47 k
C1282 C1281
0.0047
0.01 0.01
L1291 AFGV
LW-15
R1291
IC1291
R1261 R1260 R1263
8.2 k
LA4425A 2.2 k
100 27 k
C1292
C1296
10 C1262
10
5 1
470 2.2
4
9
2
8
3
R1281 7
R1292
R1293
470 100 k 6 NC
470
C1293
C1260
C1294
C1295 10 10
470 0.1
R1262 C1261
8.2 k
10
C1259
10
L1412
330 µH
C1422
47
H5V
C1420 C1421
10 0.1
14V
8V
H5V
14V
8V
5V
COMPLETE VIEW
FI761
2.7 V
D761
FL-272
MA77
1 2
3 4
R761
2.2 k
D762
MA77
2.3 V
R763
R762
220
220
2F3K
C761 C762
0.1 0.1
D771
MA77
C773
1.2 V
15 P
R771
2.2 k
D772
R751
MA77
47 R773
R772
220
220
7.6 V 4 3 2FTH
C771 C772
5 2 0.1 0.1
6 1 OPTIONAL
D781
FILTER
R748
MA77
1 2
470
Q737
R749
XP4311 R750 C743 3 4
22 k
R781
1 k 10
2.2 k
D782
MA77
C742 D732
0.1 1SS355
R782
R783
R791 R792 220
220
2.2 k 4.7 k
NBS
R793 C791 C781 C782 R785
7.3 V 2.2 k 0.1 0.1 0.1 10 k
2FOP
AGC
R8V
14V
8V
5V
R8V
_
5V
C1272
0.1
IC1251 R1256
47 k
M5282FP R1252 C1251
P1241
100 k 0.1
VCC2 1 PHR-4
VCC
IN+ 2 DAFI
VCAOUT C1255
1 1
IN- 3 R1255
0.01 AFE
CTL
2 2
OUT 4 470
VCAIN C1253
R1251 3
W1241
GND 5 330 P
100 k
R1254 W1242 4
4.7 k C1254
C1256 2.2
R1253
0.1
100 k
C1257
10 R1257
10 k
R1258 R1259
4.7 k 4.7 k
C1258
10
BEEP
2.5 V R825 R816
Q801
D763 NTCCM16083NH 681KC 2.7 k
_ 5 V
MA77 2SC4081 R
7.7V R817
2.7 k
C811
R764
0.0047
2.2 k R811
D764 1 14
1.5 k +SI VEE
MA77
2 13 R821
1.9 V GAIN NC
3 12 3.3 k
R765
GAIN -OUT
2.3 V
10 k R802 4 11 R820
-SI NC
100 5 10 1 k
BIAS -CI
R801 6 9
+OUT NC
7 8
1 k
NC +CI
D773 R815
IC811
MA77
3.3 k
C801
MC1496D
0.1
R774
R812 R813 R814
2.2 k
D774 470 470 3.3 k R818
R823
2.7 k
MA77
10
R822
R775
7.9 V
10 k 10
C813
C814 R819
0.1
0.1 1 k
D783
MA77
R784
2.2 k
D784
MA77
R795
4.7 k
C792 R794 R796
0.1 2.2 k 2.2 k
C831
0.0033
R831
4.7 M
R833
4.7 M R832
0.6 V
R836 4.7 M
9
4.7 k
8
10
R834
IC1211C
4.7 M
NJM2058M
R835
1.5 M
D831
1SS302
IC1201
3BU4052BCFV
IC1211A IC1211B
NJM2058M NJM2058M
J1221
0 V
B4B-PH-SM3-TB C1217
0.1 C1211
C1213
DAFO
1 4 2 6
0.0033 0.0015
AFE 1 7
2
3 5
3
11
R1215 R1214 R1213 R1212 R1211
4
C1215
C1216 39 k 39 k 39 k 39 k 47 k
0.1 0.1
C1212
C1214
0.0012
560 P
_
5V
5V
8V
14V
H5V
D8
C841
MA
0.0047
2.8 V R
1
3F3K
D8
MA
C818
R
0.1
1
3F6K
D8
MA
R
3
3F15
D8
MA
R841 R
10 k 3
3F0P
16
13
X X
X
3
Y X
X
Y
Y
Y
Y
INH
A
B
8 7
C12
0.0
F1352 F1353
S-N5054 #01 S-N5054
FUSE
HOLDER