Icom IC-R3 Service Manual

12 - 1
SECTION 12 VOLTAGE DIAGRAM
12-1 VCO UNIT
C158
0.001
R124
120
R3V
C156
0.001
C166
0.001
C162
10
R129
47
C180
0.001
C182
0.001
L62
ACB1608M-600
D62
1SV286
L63
17 nH
C165
1.5 P
L64
14 nH
LV 1
L917
0.1 µH
C955
470 P
C957
470 P
R941
4.7 k
R943
47
C956
47
L918
6.8 nH
C971
470 P
L920
6.8 nH
C972
1 P
C974
1.5 P
C973
7 P
C975
18 P
C976
2.5 P
L923
5.6 nH
Q863
2SC5195
R947
150 k
R946
100
R948
150 k
R949
100
C958
5 P
SHIFT
Q21
DTC144EE
C136
0.1
R52
3.9 k
R952
15
CONLO
C983
470 P
L925
6.8 nH
L924
6.8 nH
CONV
Q864
2SC5195
R950
150 k
R951
100
C982
5 P
C984
2 P
R188
1 k
R123
47 k
R104
4.7 k
R160
2.7 k
C178
0.001
C164
0.001
C163
0.001
C161
0.001
D61
MA2S077
Q22
2SC5006
R51
220
R162
8.2 k
R163
220
C183
1.5 P
C173
0.001
C160
0.001
Q23
2SC5006
R196
22
1stLO
C256
0.001
C257
0.001
R197
220
C258
0.001
R125
8.2 k
R198
100 k
R127
15
R128
15
L65
22 nH
C157
8 P
1
2
3
5
6
IC4
UPC2746T
R126
680
1
2
3
4
5
6
7
8
9
J2
1
2
3
4
5
6
7
8
9
J1
To RF unitTo RF unit
SHIFT
R38
100
C137
0.001
R50
22 k
CP3
REF
FSET
VP
LV 1
Q25
2SC5231
+3V
PSTB
PDA
R3V
CONV
PCK
2ndLO
CONLO
C131
1
R39
100 k
C139
15P
LV 3
X1
CR-674
D41
HVU350
C138
10 P
C237
0.001
R195
56
R48
5.6 k
Q32
2SC4117 GR
1 2 3 4 5 6 7 8 9
10
20 19 18 17 16 15 14 13 12 11
IC3
µPD3140GS
C129
0.01
C133
0.22
C134
0.22
C130
1
Q31
2SK880 Y
R44
390
C128
0.047
R972
220
C135
0.001
R87
10 k
R47
8.2 k
R49
5.6 k
C100
33 P
EP100
MMZ 1U
EP101
MMZ 1U
R46
390
+3V
LV 3
C981
2 P
Q862
2SC5195
C978
1 P
C979
3.5 P
L921
6.8 nH
L922
5.6 nH
C977
1.5 P
R945
180
C968
18 P
L919
22 nH
C959
7 P
C967
6 P
C960
1.5 P
Q861
2SC5006
C965
0.001
R940
1 k
D913
1SV305
CP5
C969
0.01
R944
4.7 k
C964
10 P
PSTB
R42
100
R41
100
C121
47 P
C122
47 P
PDA
PCK
R43
100
C123
47 P
Q871
2SC4117 GR
Q33
2SC4617 S
C991
1
C127
1
R971
10 k
R970
5.6 k
R45
5.6 k
C125
0.01
C145
0.001
R88
100 k
D42
MA2S111
C126
0.047
Q870
2SK880 Y
C124
0.001
R89
56
R40
100 k
C140
0.01
FSET
VP
R69
22 k
2ndLO
C132
0.1
R90
1 k
R922
47
C250
8 P
C252
8 P
C81
0.001
C251
4 P
Q853
2SC5231 C8
C249
0.001
L68
100 µH
L69
22 nH
C154
39 P
R923
100 k
C254
4 P
R121
330
CP4
C79
0.001
D201
MA2S111
D202
1SV286
R119
4.7 k
R921
120
R120
4.7 k
C255
0.001
6
5
4
2
3
1
Q34
UPA804T
C82
10
C259
0.001
C253
2 P
C78
0.1
R122
3.9 k
R154
120
L45
42 nH
C80
2 P
R3V
C260
0.001
4
VCC1 IN1 ENB CLK DATA T1 LOK CP1 FI1 FO1
GND1
IN2
VCC2
XB
XI
XO
GND2
CP2
FI2
FO2
12
34
2.8 V 1.2 V
2.9 V 0.6 V
0.7 V
1.8 V
2.8 V
2.9 V
0.6 V
0.7 V
1.0 V
2.0 V
0.7 V
2.6 V
2.4 V
3.1 V
2.4 V
2.0 V
0.7 V
0.8 V
1.3 V
3.0 V
1.8 V
0.6 V
3.1 V

Icom IC-R3 Specifications

General

Brand	Icom
Model	IC-R3
Category	Receiver
Language	English