Etapas De Entrada Y De Salida Del Receptor 1-25 W Uhf2 (438-470 Mhz) (Hoja 1 De 2) - Motorola EM200 Serie Manual De Servicio

4-12
RX
IF300
1
C339 C341 C340 C345
2.4p 4.7p 2.4p 3.9p
C334
DNP
C1121 C300
L309
5.6p 51.p
C338 18.08n
L300
10.p
18.08n

Etapas de entrada y de salida del receptor 1-25 W UHF2 (438-470 MHz) (hoja 1 de 2)

9V
9V
3V
R346
10.K
3V
5V
R345
10.K
5V
Q300
RX_EN
SH300
C349
SH301
SHIELD
120.p
SHIELD
1
1
C328 C370
43.p
24.p
C368 DNP
20.p DNP
CR301 8.2p
C353
82.p
L310
18.08n
Esquemas eléctricos de la tarjeta de circuito impreso 8488978U01 del radio UHF 1-25 W banda 2 (rev. P9)
FRONT-END SHIELD
9R
Q306
R300
R310
LOC_DIST
10.K
15.K
R336
220.
C323 C350
120.p
1n
Q301
L301 R331
150.n
100.
R326
2.7K
C351
100n
C343
C347
R347
R330
C326 3.6p 3.6p
15.
820.
22.n
C342
C346
4.3p 4.7p
Q303
BFS540
L312
L311
18.08n
18.08n
DNP C355 C331
39.p 10.p
C357
36.p
RX_INJ
Q304
R334
430.
C321
120.p
L304
150.n
D305
C327
C335
C344 C348 C329
3.6p 3.3p 36.p 10.p 330p T300
XFMR
6
R338
100.
4
DNP
L313
C330 C358
10.p C333
10.p 36.p
C332
12.p
18.08n
L314
18.08n
T301
XFMR
6
L307 L308
C325 C324
120.p 18.08n 120.p 18.08n
4
R301
C367
C356
C366
8.200p 470.
10.p
15.p
1 1
TP1
TP4
TEST_POINT
TEST_POINT
MIXER SHIELD
1
L306
470.0n
2
3
R340
51.
L302 C354
150.n 82p
U302
1
2
3
SH302
SHIELD
1