Uhf Voltage Controlled Oscillator Schematic Diagram - Motorola GP88s Service Manual

Circuit Board/Schematic Diagrams and Parts List
C281
R245
100pF
240
C276
2.2uF
L281 L273
390nH 33nH
C272
NU
L271
68nH
RX_INJ
TX_INJ
C271
NU
SH241
SHIELD
1
VCO TOP SHIELD
5V
AUX3
C297
.01uF
VSF
C286
0.1uF
C273
0.1uF
18 14
10
TX_OUT
8
RX_OUT RX_IADJ
SUPER_FLTR
12
PRESC
PRESC_OUT
COLL_RFIN
U241
RX_BASE
7 50U54
Rx_sw
RX_SWITCH
RX_EMITTER
13
Tx_sw
TX_SWITCH TX_BASE
TX_EMITTER
17 11 9
SH242
SHIELD
1
Q261
4
VCO BOTTOM SHIELD
10K
DD
4.7K
Q260
R260
1K
3 4
10K
2
47K
4.7K
47K
1
R242
200
C285
100pF
C246
100pF
R244
12K
1
TX_IADJ
2
3
Q241
2
4
BFQ67W
5
1
6
16
3
L282
15
390nH
20
FLIP_IN
19
TRB_IN
R253
7.5K
R254
7.5K
C289
C254
100pF
3.6pF
3
C255
100pF L253
47K 2 RESONATOR
AUX4
47K
R252 R251
1
330 18
L243
C250
RESONATOR 7.5pF
3
R241
18
C242
7.5pF
2
C243
1 7.5pF
C245
2.4pF
CR243
C244
R243
2pF
10K
Rx_sw
VSF CR241
R248
30
C247
C248
100pF
0.1uF
Tx_sw
C252
L251
10pF
33nH
C251
C253
CR251
100pF
1.5pF
2

UHF Voltage Controlled Oscillator Schematic Diagram

-19
9A
L242
220nH
CR242
L241
390nH
VCTRL
C241
100pF
3
1 2
ZMY0130318-A