Motorola PRO3150 Manual De Servicio página 100

4-48
C308
100pF
R301
R302
100K
100K
C303
C301
6.8pF 3.9pF
RX_IN
CR302
CR301
L301 L302
C302 C304
10pF 13.9nH 13.9nH
13pF
SH301 SH302
SHIELD SHIELD
1 1
if if
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
if
RX Mixer Diode Shield
Figura 4-31. Diagrama esquemático de la etapa de entrada del receptor de rango 1 de UHF (403-470 MHz) (tarjeta de circuito impreso nº 8480672Z04)
R305
510
R304
12K
L304
C321
180nH
100pF
C309
100pF
C310
0.1uF
R303
4.3K
C307
C305
Q301
3
20pF 0.1uF
1
CR303 2
3
R328
0
R340
L303
2 1
22nH 6.8K
R5
L340
390nH
SH303
SHIELD C395
100pF
1
if
Mixer Shield
DACRx
R5
R342
100K
C314 C315
100pF
0.1uF
C380
.01uF
C306
NU
R306
100K
C312
C316
L305
13pF 3.9pF
22nH
CR304
C311 C313 L306
NU 13.9nH
10pF
CR308
HSMP3820
R317
R347
1K 1K
1 3
2
C331
100pF
C396
R336
NU
NU
R5
R316
91K
C333
NU Q315
3
1
2 R318
18K
1
R319
150
R327
33K
3
2
1
2
Q316
NU
R326
NU
T301
XFMR
6
R307
100K
C318
R329
7.5pF
0
4
CR305
L307 C317
C381
13.9nH
9.1pF 7.5pF
TP302
R5
R339
0
R332
NU
C386
100pF
C370
1
100pF
RX_INJ
R300
2.2K
RSSI
R330 C371
NU
NU
C397
0.47uF
RT300
33.0K
R335
R338
NU
8.2K
NU
R5
2 1
VR300
NU
RT301
C391
R325 33.0K
0.1uF
6.8K
NU
R334
NU
C322
82pF
L310
150nH
R308 R310
47 270
R309
0
IF
CR306
4 3
1
2
2 1
3
T302
1 2 3
XFMR
6 4
L309
R348
3.6K 16.28nH
C320 C319 C375
1.8pF 100pF
7.5pF
L321 R333 C374
VCO
100pF
NU NU
R349
0
3 C373
C378
Q310
NU NU
NU
2
R331 C372
NU NU
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