Uhf Receiver Front-End Schematic Diagram - Motorola HT Series Detailed Service Manual

20
C308
100pF
R301
R302
100K
100K
C305
C301 C303
20pF
3.6pF 3.9pF
RX_IN G
CR302
CR301
C302 L301 L302
C304
10pF 13.9nH 13.9nH 9.1pF
SH301 SH302
SHIELD SHIELD
1 1
RXFE Bottom Shield
RXFE Top Shield
SH304
SHIELD
1
RX Mixer Diod Shield
December 26, 2003
C314
R305
0.1uF
510
R304
12K
L304 C321
180nH 100pF
C309
100pF
C310
100pF
R303
2.0K
C307 Q301
3
100pF
1
3
CR303 2
R328
0
L303 R340
2 1
22nH 7.5K
SH303
SHIELD
1
Mixer Shield
Figure 2-4. UHF Receiver Front-End Schematic Diagram
DACRx
R5
R342
100K
C315
100pF
C380
.01uF
C306
NU
R306
R307
100K
100K
C312
C316
L305
6.8pF 3.9pF
22nH
CR305
CR304
C311 C313 L306 L307
13.9nH 13.9nH
NU 10pF
Circuit Board/Schematic Diagrams and Parts List
C322
82pF
L310
150nH
R308
51
R309
T301
XFMR
6 1
2
C318
R329
7.5pF
0
4 3
T302
2580541Z02
XFMR
C381
C317
9.1pF NU
R348 L309
3.6K 16.28nH
TP302
C320
16pF
R5
L321 R333
180nH NU
R339
4.3K
R332
12K
C386
100pF
3
C370
4.7pF 1
Q310
RX_INJ
G
2
C372
R331
R330 C371
100pF
240
10K
NU
R310
NU
0
IF
G
CR306
4 3
2 1
C319
C375
2.7pF
100pF
VCOBUF
G
C374
100pF
R349
0
C373 C378
NU NU
FMR-2045A-2