Vco Unit - Icom IC-91A Service Manual

12-4 VCO UNIT

VCO UNIT
J1
ULV
LOOUT
UVCO3
GND
GND
PLLOUT
MOD
GND
to RF
GND
unit J800
BCVCO3
VLV
VSHIFT
VVCO3
GND
GND
BCLV
R110
15K
C115
0.1
C114
0.001
C117
1
R1
47K
D5
R8
1SV325
1k
C1
D1
0.001
1SV325
Q2
D2
UNR9211J
1SV308
C6 C5
0.001
0.01
R61
2.2M
R62
R51
100K
D55
47K
1SV286
R50 D54
1k 1SV325
C51
D51
0.001
HVC376B
D52
MA2S077
Q52
C56
C55
UNR9211J
0.001 0.001
R59 27K C62
C116 0.1
R58
0.001
27K
R109 3.9K
R108
2.2M
R101
R107
47K
100K D100
1SV286
R113
4.7K
R100
1k
D101
C101
HVC375B
0.001
Q102
D102
UNR9211J
MA2S077
C106
C105
0.001
C102
R111 0.001
56P
1k
L203
12N
C213
7P
C7
0.001
R2
2.2K
C8
R4
0.01
10K
L2
LQW18AN68NG00D
C3
C9
120P
82P
R5
10K
C4
0.01
C10
0.001
R10 L3
0.15
2.2K
C57
0.001
C63
R52
0.5P
2.2K
C58
0.001 R54
8.2K
C53
C59
33P
L52 27P
R55
22N
10K
C60
47P
C54
0.001
L53
R60
LQW18AN24NG00D
2.2K
C: 3.26V
L204
6.8N
C107
0.001
R102
2.2K
C108
R104
0.001
3.3K
L102
LQW18AN5N6C00
C103
C109
10P
18P
R105
10K
C104
0.001
C118 C110
R112 15P
5P
2.2K
12 - 4
L202
C208
8.2N
0.001
L201
C211
C210 82N
C209
3P
5P 5P
D4
1SS400
C200
R3 0.001
47
R200
180
A: 2.08V
R203
B: 2.11V
82
C: 2.09V
A: 3.00V
C201
0.001
Q1 R201
2SC5195 68K
C203
0.001
C11
R202
2P
Q200
15
A: 0.62V
2SC5006
R6
120
R204
82
R9
0
D53
1SS400
R53
47
A: 50MHz RX
B: 145MHz RX
B: 3.00V
C: 435MHz RX
Q51
2SC5195
C61 C61
0.3P
B: 0.86V
R56
150
D103
R115 R114
1SS400
0 0
L101
0.1U
C111
2P
Q101
2SC5006
Explanatory notes
C: 1.64V
R106
220
A: 3.38V
B: 2.41V
C: 2.39V
Q202
C207
2SC5006
0.001
R208
68K
C206
R207 0.001
47
R205
C202
47
0.001
L200
82N
R206
33K
C204 C205
0.001
0.001
Q201
2SC5006
A: 2.20V
B: 2.22V
C: 2.25V
VOLTAGE LINE
TX LINE
RX LINE
COMMON LINE