Motorola PRO Elite Serie Manual De Servicio página 102

7-4
R301
100K
C301 C303
3.6pF 3.9pF
RX_IN
CR301
L301
C302
10pF 13.9nH
SH301 SH302
SHIELD SHIELD
1 1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diod Shield
Figura 7-4. Diagrama esquemático de la etapa de entrada del receptor de UHF
R305
510
R304
12K
L304
180nH
C309
C308 100pF
100pF
R303
R302
1K
100K
C305 C307
Q301
3
20pF 0.1uF
1
3
CR302
CR303 2
R328
2.7
L302
L303 R340
C304
2 1
13.9nH 220nH 6.8K
9.1pF
R5
L340
390nH
SH303
SHIELD C395
100pF
1
Mixer Shield
DACRx
R5
R342
100K
C314 C315
0.1uF 100pF
C380
.01uF
C321
C306
100pF
NU
R306
C312 100K
C310 C316
L305
6.8pF
0.1uF 3.9pF
27nH
CR304
L306
C311 C313
NU 10pF 13.9nH
CR308
HSMP3820
R347 R317
1
1K
1K
3
2
C331
100pF
C396
R336
NU
NU
R5
R316
91K
C333
Q315
NU 3
1
2 R318
18K
1
R319
150
R327
33K
3
2
1
2
Q316
NU
VR300
R326 R334
NU
Tarjeta de circuito de UHF banda 1, esquemas eléctricos y lista de partes
C322
82pF
L310
150nH
T301
XFMR
6 1
R307
100K 2
C318
R329
7.5pF
0
4 3
CR305
L307
C317 C381
13.9nH
9.1pF 9.1pF
R348
3.6K
TP302
R5
L321
NU
R339
0
R332
NU
C386
100pF
3
C370
100pF 1
RX_INJ
2
R300
2.2K
RSSI
R330 C371 R331
C397
NU NU NU
1uF
RT300
33.0K
R335
R338 NU
NU
R5
2 1
NU
RT301
R325 C391 NU
6.8K
NU
NU
R308
R310
270
270
R309
18
IF
CR306
4 3
2 1
1 2 3
T302 XFMR
6 4
L309
16.28nH
C320 C319 C375
7.5pF 100pF
1.8pF
R333
C374
NU
100pF
R349
0
C373
C378
NU
Q310 NU
NU
C372
NU