Motorola PRO3150 Manual De Servicio página 84

4-32
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 VCO BOTTOM SHIELD
5V (Rx)
5.05V (Tx)
5V
5.043V (Rx)
3.218V (Tx)
AUX3
C297
.01uF
Figura 4-25a. Diagrama esquemático del oscilador controlado por voltaje de rango 1 de UHF (403-470 MHz) (tarjeta de circuito impreso nº 8480672Z01)
VSF
C286
4.567V (Rx)
0.1uF
4.613V (Tx)
C273
0.1uF
18 14
10
TX_OUT TX_IADJ
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
FLIP_IN
TRB_IN
17 11 9
9.59mV (Rx)
4.998V (Tx)
SH242
SHIELD
1
Q261
4 3
10K
DD
2
47K
4.7K
Q260
R260
47K
1K
3 4 1
10K
2 47K
4.7K
9.55mV (Rx)
5.058V (Tx)
47K
1
R242
200
C285
100pF
C246
100pF
R244
12K
1
2
3 Q241
2
4 BFQ67W
5
1
6
16
3
L282
15
1.978V (Rx)
390nH
20
19
4.639V (Rx)
R253
7.5K
Tx_sw
R254
7.5K
C289
C254
100pF
3.6pF
C255
100pF
L253
RESONATOR
AUX4
R252 R251
330 18 2
L243
C250
RESONATOR 7.5pF
3
R241
18 C242
7.5pF
2
C243
1 7.5pF
C245
2.4pF
CR243 CR242
C244
R243
2pF
10K
Rx_sw
VSF CR241
3
R248
30
C247
C248
100pF 1 2
0.1uF
C252
L251
10pF
33nH
C251
C253
CR251
100pF
1.8pF
L242
220nH
3.499V (Rx),4.125V (Tx)@403.355MHz
8.798V (Rx),9.216V (Tx)@469.985MHz
L241
390nH
VCTRL
C241
100pF
ZMY0130318-C