Uhf Receiver Front End Schematic Diagram - Motorola GP328 Detailed Service Manual

-18
6A
R301
100K
C301 C303
3.6pF 3.9pF
RX_IN
CR301
C302 L301
13.9nH
10pF
SH301 SH302
SHIELD SHIELD
1 1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diod Shield

UHF Receiver Front End Schematic Diagram

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
C315
C314
0.1uF 100pF
C380
.01uF
C321
C306
100pF
NU
R306
C312 100K
C310 C316
L305
6.8pF
0.1uF 3.9pF
27nH
CR304
C311 C313 L306
10pF 13.9nH
NU
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
Circuit Board/Schematic Diagrams and Parts List
C322
82pF
L310
150nH
T301
XFMR
6
R307
100K
C318
R329
7.5pF
0
4
CR305
L307
C317 C381
13.9nH
9.1pF 9.1pF
R348
3.6K
TP302
R5
L321
R339
0
R332
NU
C386
100pF
3
C370
100pF 1
RX_INJ
2
R300
2.2K
RSSI
R330 C371 R331
C397 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
1
2
3 2 1
1 2 3
T302
XFMR
6 4
L309
16.28nH
C320 C375
C319
7.5pF 1.8pF 100pF
R333
C374
NU NU
100pF
R349
0
C373
C378
NU
NU
Q310
NU
C372
NU
NU