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Icom Manuals
Transceiver
IC-703
Service manual
Icom IC-703 Service Manual page 70
Hf/ 50mhz all mode transceiver
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Also See for IC-703
:
Instruction manual
(112 pages)
,
Installing manual
(5 pages)
,
Instruction manual
(9 pages)
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Table Of Contents
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MAIN UNIT(2)
BUS LINE1
14V
5V
T8L
T8V
8V
a
8V
Q652
Q752
XP4311
DTA114EE
4
3
L701
LR-317
R758
5
2
1k
6
1
Q753
2SK3018
8V
R757
220
b
R8L
c
L752
R755
0.47
15
d
Q751
2SC4673
R772
C759
L753
18
470p
68n
C757
5p
8V
L1001
MAIN
100
UNIT
(1)
Q1001
DTA114EE
R1000
1k
Q1003
2SC4081
Q1002
2SC4081
Q1006
2SK3018
e
R8V
BUS LINE2
FI1301
D1303
D1311
FL-65
MA77
MA77
f
O
I
2F23
R1323
100
FI1341
D1305
D1313
CFWS455G
MA77
MA77
O
I
2F80
R1343
100
D1307
D1315
D1401
MA77
MA77
MA77
2FOP
R1363
C1303
D1402
100
0.0047
MA77
D1309
C1383
R1385
D1317
MA77
0.1
1k
MA77
2FTH
R1383
100
g
h
3V
BUS LINE3
11 - 3
R801
L801
R802
1k
0.27
47
TX: 0V
C801
C802
R811
RX: 0.55V
0.001
18p
1k
D701
L702
Q811
HSB88WS
LR-358
2SK508
W830
W831
T8L
R8L
L831
LS-484B
R842
R831
EP831
1k
1k
Q831
3SK294
TX: 0.25V
RX: 0V
R1005
47k
R1010
47k
R1006
680
Q1004
2SA1576
Q1005
2SC4081
TX: 0V
C1410
R1407
RX: 7.9V
0.0047
470k
C1411 0.1
R1408 470k
D1408
MA2S111
C1406 0.1
R1415 47k
8
7
6
5
C1409
0.0047
IC1401
TX: 7.9V
TC4W53F
RX: 0V
1
2
3
4
R1400
5.6k
D1403
MA77
C1401
D1404
0.0047
MA77
TX: 1.5V
RX: 1.6V
C1407
Q1401
0.0047
3SK294
Q1402
DTC114EE R1405
C1408
150
0.0047
TX: 1.6V
RX: 1.6V
TX: 0.3V
RX: 0.35V
3V
14V
5V
T8L
T8V
8V
R8L
R813
EP812
100
D803
MA77
FI851
FL-348
D804
L851
L852
5
MA77
LR-414
LR-414
1
4
IN
GND
3
2
GND
OUT
6
T8L
R8L
ALCL
TX: 1.5V
RX: 2.7V
L832
L881
R840
LS-484B
LS-484B
220
R841
NTCG16
NB OFF: 0V
ON: 7.7V
R1052
100
C1005
0.0022
L1052
LS-450
Q1051
2SK882
R8V
8V
5V
R1501
100k
T8V
L1501
LS-468
FI1501
CFWS455E
I
O
5V
R2460
R2461
10k
1k
Q2462
2SK3018
R2456
1k
g
Q2461
2SB1132
h
SQL CLOSE: 3.2V
OPEN: 0V
C2501
150p
T8V
IC2461
TC4W53F
Q1403
AFI
1
8
5V
DTA114EU
SQL
2
7
o
3
6
W1421
Q1404
2SK3018
4
5
DSPS
C861
0.1
D861
R862
D863
MA77
18
MA77
D901
D862
D864
L901
L902
HSB88WS
MA77
MA77
LR-317
LR-395
W901
T8L
R8L
ALCL
L882
TX: 0V
LS-484B
RX: 1.6V
Q881
3SK294
TX: 0V
RX: 0.45V
Q1052
Q1053
L1053
2SK882
2SK882
LS-450
R8V
8V
5V
ALCL
T8V
C2505
R2506
Q2502
Q2503
10
1k
DTA114EE
DTA114EE
R2511
R2513
1k
1k
Q2504
Q2505
2SK3018
2SK3018
C2503
AFMS
0.0047
8V
R2502
1k
R2509
D2502
68k
MA2S111
C2551 0.0047
R2508
R2507
R2501
15k
10k
R2559 3.3M
22k
R2551
Q2501
2.2M
6
2SC4081
-
7
5
+
IC2401
NJM2902M
BUS LINE1
14V
5V
T8L
T8V
8V
R8L
EP901
R8L
MAIN
UNIT
(3)
R8V
8V
5V
p
T8V
8V
3V
BUS LINE3
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Ic-i703
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