Voltage Diagram; Vco Unit - Icom IC-R3 Service Manual

SECTION 12

VOLTAGE DIAGRAM

12-1 VCO UNIT

C955 C956
470 P 47
R946
100
C971
470 P
R947
150 k
R943
47
C957
L918
470 P
6.8 nH
R941 L917
4.7 k 0.1 H
C959 C960
C958
7 P 1.5 P
5 P
Q862
0.6 V
2SC5195
2.8 V 1.2 V
C968 L919 C964
18 P 22 nH 10 P
C967
R945
Q861 6 P
180
2SC5006
D913
C965
R944
1SV305
0.001
4.7 k
R940
1 k
C969
0.01 CP5
R949 R950
100 150 k
C983
470 P
R948 L920
150 k 6.8 nH
2.8 V
C972 C974 C976 L923 L924 C982
1 P 1.5 P 2.5 P 5.6 nH 6.8 nH 5 P
2.9 V 0.6 V
0.7 V
C978
C973 C975
1 P
7 P 18 P
Q863
2SC5195
L921 L922
C977 C979 C981
6.8 nH 5.6 nH
1.5 P 3.5 P 2 P
L62 L63 L64
ACB1608M-600 17 nH 14 nH
LV1
C180
C182
0.001
0.001
Q21 D61
MA2S077
DTC144EE R188
1 k
SHIFT
C163
C164
R123
0.001
0.001
47 k
CONV
R951
100 C136
0.1
C161
0.001
R52
L925
3.9 k
6.8 nH
2.9 V
CONLO
C984 R952
2 P 15
Q864
2SC5195
C133 C134
0.22
0.22
MMZ 1U
EP100
MMZ 1U
EP101
C100 R46
33 P 390
IC3
PD3140GS
+3V
LV3
R44
390
R87
10 k
R41 R42
100 100
PSTB
PCK
PDA
R43
100
C126
0.047
D42
MA2S111
C124
0.001
C121 C122 C123 R88
47 P 47 P 47 P 100 k
R89
56
3.1 V
Q33
3.1 V
2SC4617 S
R121
330
R3V
C82
C260
10
0.001
D201
R122
MA2S111
L45
3.9 k
42 nH
C78 C79
0.1 0.001
CP4
D202
1SV286
2.6 V
C165 R125 R124 C166 C162
1.5 P 8.2 k 120 0.001 10
C156
D62
0.001
1SV286
2.4 V
C178
0.001
R126
680
L65
R160 R104
Q23
1.0 V 22 nH
2.7 k 4.7 k
1
2SC5006
R163
R162
220
8.2 k
2
C157
1.8 V
8 P
Q22
C173
2SC5006
0.001
C183
1.5 P 0.7 V
R196
22
R197
R198
220
100 k
2.0 V
C257 C256
R51
0.001 0.001
220
0.7 V
C135
R195
0.001
56
Q25
2SC5231
R47
C130 C131
8.2 k
1 1
CP3 C137
0.001
C129
0.01
Q31
R38
2SK880 Y
100
Q32
R48 2SC4117 GR
1
5.6 k
R50
C128
22 k
0.047
R49 D41
5.6 k HVU350
C138
R972
10 P
220 R39
C125
R69
100 k
0.01
22 k
C132
0.1
C127 C991
1 1
C145
R45 R40 C140
0.001
5.6 k
100 k 0.01
Q871
2SC4117 GR
R970
Q870
5.6 k
2SK880 Y
R971
10 k
2.4 V
R922
C259
47
0.001
C81
0.001
R154 3.0 V
R923
L68
120
100 k
100 H
C154 L69
2.0 V
0.7 V 39 P 22 nH
C80 R119
1.8 V
2 P 4.7 k
C254
4 P
0.6 V
6 1
C253
2 P
C251
5 2
C250
4 P
8 P
Q853
4 3 1.3 V
2SC5231 C8
R120 C255 R921 C249
Q34
4.7 k 0.001 120 0.001
UPA804T
0.8 V
12 - 1
R129
47
R3V
C158
0.001
C160
R127
6 0.001
15
4 1stLO
3 5
IC4
UPC2746T
R128
15
C258
0.001
C237
0.001
REF
1
FSET
2
VP
3
SHIFT
4
5
6
LV1
7
+3V
8
PSTB
9
X1
CR-674
2 PCK
1
PDA
2
2ndLO
3
3 4
R3V
4
CONV
5
6
LV3
7
CONLO
C139 8
9
15P
FSET
VP
R90
1 k
2ndLO
C252
8 P