Icom IC-703, Service Manual

Page: 71 / 77

BUS LINE1
R8L
14V
5V
8V
T8L
T8V
R8V
BUS LINE3
3V
VCC2
IN+
IN-
OUT
GND VCC
VCAOUT
CTL
VCAIN
NC
IC1601
M5282FP
1
2
3
4
5
6
7
8
9
10
IC1602
TC4W53F
5
6
7
8 1
2
3
4
COMS
R1611
47k
C1606 0.1
C1607 1
C1608 10
R1606 47k C1610 10
MIGV
C1609
0.1 R1609
6.8k
AMOD
C1611 1
R1610 4.7k
VDD
X2 X1
X
X0 X3
A B
Y0 Y2 Y Y3 Y1 INH VEE VSS
1 2 3 4 5 6 7 89
10 11 12 13 14 15 16
IC1701
BU4052BCF
R1704 470k
R1705 470k
R1703 470k
R1702 470k
R1701 470k
C1701 10 R1707 47k C1702 0.1
R1706 47k
C1703 0.47
DIN
MODS
D96S
R1708 4.7k R1709 47k
Q1701
DTC114EE
C1721
1 R1721
100k
Q1721
2SC4081
R1722 220 R1725 820
R1724 1.5k
IC1751
TC4W53F
AMS
R1751
2.2k
C1752 0.0047
MINH
C1809 1
W1801
Q1803
2SK3018
W1813
R1811
RV-156
R1816 47k
R1815 1k
C1801
2.2
R1802 4.7k
R1818
470
R1803
EVM-3Y
R1804 4.7k
D1801 MA2S111
LO1
VCC
RF2
RF1 LO2
GND
IF2
IF1
IC1801
TA4107F
1
2
3
4 8
7
6
5
R1805
100 C1802
0.1
BFO
R1806 2.2k
R1807 RV-143
R1808
2.2k
D1802
1SS372
C1805 0.1
L1801
100
µ
L1802 2.2M
C1806 0.1 C1807 10
R1809
2.2k
R1819
680 C1808
0.1
R1817 100k
L1803
100
µ
a
R1810
10k
Q1801
DTC114EE
IC1901
TA4101F
1
2
3
4 5
6
7
8
BASE
BASE
GND
COLECT BASE
OSCIN
VCC
IFOUT
C1904 0.1 C1903 0.1
C1902
100p
b c
C1901 0.1
R1901 100
SSAF
R1903 27k
C1906 10 C1907 0.1 C1908 0.1
R1902
100 C1905
0.1
C1909 0.1 C1910 10
BUS LINE1
R8L
14V
5V
8V
T8L
T8V
C2001 0.0047
D2001 RB876W
R2001
1k
R2003 56k
C2003 0.0047
R2005
1k
C2002 0.1 R2002 100k
R2004 47
C2004 0.0047 R2006 47k
R2007 10k
C2005
3.3
AMAF
Q2102
2SK3018
R2106 47k
R2105
1k
Q2101
DTA114EE
FMS
L2101 100
µ
C2103 10 C2104 0.1
IC2101
TA31136FN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
OSCIN
OSCOUT
MIXOUT
VDD
IFIN
BIAS
FILOUT
FILIN
AFOUT
QUADIN
IFOUT
SOUT
NDET
NOUT
VSS
MIXIN
C2101 0.1
C2106 220p
R2101
150k
C2105 220p
R2102 15k
C2102
0.1
R2103
330k C2107
0.01
FDET NSQL
C2109
0.1
C2151 0.1
R2151 10k
C2152
0.01
C2110
100p
X2101 CDBC455CX24
R2104 3.3k
Q2103
DTA114EU
R2152
39k
R2153
0.01
R2154 150k
-
+
9
10
8
R2155 10k
IC2401
NJM2902M
FMAF
C2154 0.1
Q2104
2SK3018
R2108 47k
2NTH
R2109 1k
R1621
10k
R1622 6.8k
C1621 0.039
-
+
2
1
3
IC1621
NJM2902M
R1623
100k
R1624 10k
R1625 15k
COMI COMV
C1645 0.1
R1649 100k
R1646
150k
IC1621
NJM2902M
5
7
6
+
-
R1644 100k
C1647 0.1
R1650 100k
C1641 1
R1641
10k
R1642 56
C1642 0.1
R1643
10k
C1646 0.1
R1648
100k
D1641
DA221 D1642
DA221
C1622 0.1
V+
GND
4
11
IC1621
NJM2902M
R2202 18k C2201 0.1
R2201 15k R2203 100k
C2202 0.1
R2204 100k
-
+
9
8
10
IC2201
NJM2058M
R2206
220k
R2205 100k
C2203 0.1
R2207
1k
D2221 1SS385
C2221 0.1
R2221
100k
C2222 0.1 R2222 100k R2224 100k
-
+
13
14
12
IC2201
NJM2058M
R2223 150k
R2208 1k
R2209 1k
OVDK
V+
GND
4
11
IC2201
NJM2058M
C2204 0.1
VDD
IC2301
BU4052BCF
2 1 3
X2 X1
X
X0 X3
A B
Y0 Y2 Y Y3 Y1 INH VEE VSS
4 5 6 7 89
10 11 12 13 14 15 16
C2302 0.1
R2302 10k C2301 10
R2306 27k
R2305 470k
R2304 47k
R2303 15k
AMAF FMAF SSAF
SQL AFS2 AFS1
R2401
10k R2402
10k
C2401
0.0047
-
+
2
1
3
IC2401
NJM2902M
R2403 47k
C2403
10
R2404 100k
Q2451
2SK3018
R2453
1k
k
DSTB
Q2452
2SK3018
l
DINT
R2452
1k
Q2454
2SK3018
j
MDT
R2454
1k
Q2455
2SK3018
i
MCK
R2455
1k
DSPS
o
-
+
9
8
10
IC1621
NJM2902M
R1663 470k
C1662 100p
R1662 4.7k
C1661 0.1
R1661
10k
W1661
C1601 1
MIC
R1601
1k R1602
220
C1602 10
R1667 100k
R1665 10k C1663 0.1
R1664 6.8k
VOXL
C1681 1
-
+
13
14
12
IC1621
NJM2902M
R1686 100k
C1682
470p R1683
2.2k
R2601 15k
R2602 18k
R2603 47k
C2601 0.1
C2602 0.1
R2604
100k
-
+
6
7
5
IC2201
NJM2058M
R2606 270
C2604 0.1
R2607 150k
R2608
150k
R2611 150k
R2610 270k
R2612 390k
C2606 0.001
R2613
82k
C2607
0.0022
R2614
82k
-
+
2
1
3
IC2201
NJM2058M
C2608 120p
R2615
1.2k
Q2601
2SK3018
2N80
R2624 47k
R2623
1k
R2626 NTCG16
R2616 1k R2625 3.3k R2617 6.8k
R2618 RV-109
1
2
3
4 5
6
7
8
R2619 560
R2620
22k
R2622 27k
R2621 RV-148
C2652
1
R2651 100k
C2605
0.1 R2609
220k
TONE
FMS
5
6
7
8 1
2
3
4
IC2651
TC4W53F
C2651 0.1
R2652 100k
FMOD
RXS
POCV
R2702 10k
R2704
56k
HFS
Q2701
DTC114EE
R2705 RV-156
50MS
Q2702
DTC114EE
R2706 RV-156
FORL
R2707 RV-156
Q2703
2SK3018
R2724 47k
R2723
1k
C2704 0.1
R2725
1k
R2726 47k
Q2704
2SK3018
-
+
2
1
3
IC2701
NJM2902M
CP2711
R2709 47k
R2710
100k C2701
22p
R2711
1M R2712
2.2M
D2704
MA2S111
C2702 10
R2714
470
R2713
330
D2705 DAP222
IDS
R2722 10k
R2721 22k
R2742 10k
R2741 100k
C2705 0.1
Q2705
2SK3018
R2728 47k R2727 1k
R2729
100k
R2743 100k
IC2701
NJM2902M
5
7
6
+
-
R2744
1M
R2745
470
REFL
D2741 DAP222
10
8
IC2701
NJM2902M
9
+
-
R2762
2.2M
R2761
470
R2764 33k
R2765
RV-150
R2766 33k
R2767
47k
R2768
47k
IDH IDL
W2782
C2781 1
Q2781
2SA1576
R2786
1k
R2787 10k
R2783
10k
R2781
2.2M
D2781
MA8036
D2782
DAP222
EALC
R2788 100k
12
14
IC2701
NJM2902M
13
+
-
W2785
R2789
470
ALCL
p
BUS LINE3
3V
IC2701
NJM2902M
V+
GND
4
11
C2791 0.1
MAIN
UNIT
(2)
MAIN
UNIT
(4)
MICE
W1601
R1607 1k
R1723 1k C1722 1
C1751 0.1
R1820
100
Q1802
DTA114EE
L1901 100
µ
R2107
3.3k
R2153 150k
R2301 10k
R1645 100k
R1647
100k
C2402 0.0022
e
R1684 10k
R1666
100k
C1664 0.1
R1668 47k
MAIN UNIT(3)
5V
8V
T8V
5V
8V
5V
14V
T8L
T8V
8V
R8L
5V
8V 8V
8V
5V
8V
8V
3V
8V
R2708
220k
AMS
R7305 100k
FMS
T8V
8V 5V
T8L
5V 5V
T8V
C1723
1
AMS
R1812 NTCG16
8V 5V
5V
8V
BFO BFO
R8V
8V
5V
8V 8V 8V
5V
8V
FMS
8V
3V
8V 8V
8V
8V
OTHER MODE: 0V
FM MODE: 3.1V
11 - 4