Uhf Receiver Front End Schematic Diagram - Motorola GP88s Service Manual

-16
9A
C308
100pF
R301
R302
100K
100K
C301 C303
6.8pF 3.9pF
RX_IN
CR301 CR302
C302 L301 L302
10pF 13.9nH 13.9nH
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
100pF
C310
0.1uF
R303
4.3K
C305 C307
Q301
3
20pF 0.1uF
1
3
CR303 2
R328
0
L303 R340
C304
2 1
22nH 6.8K
13pF
R5
L340
390nH
SH303
SHIELD C395
100pF
1
Mixer Shield
DACRx
R5
R342
100K
C314 C315
0.1uF 100pF
C321
100pF C306
NU
R306
C312 100K
C316
L305
13pF
3.9pF
27nH
CR304
C311 C313 L306
NU 10pF 13.9nH
CR308
HSMP3820
R347
R317
1
1K
1K
3
2
C331
100pF
C396
R336
NU
NU
R5
R316
91K
C333
NU Q315
3
1
2 R318
18K
R319
150
R327
33K
3
1
2
Q316
NU
R326
NU
C380
.01uF
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
100pF 1
RX_INJ
R300
2.2K
RSSI
R330 C371
C397
NU NU
1uF
1
RT300
33.0K
R335
R338 NU
2
NU
R5
2 1
VR300
NU
RT301
R325 C391 NU
6.8K
NU
R334
NU
Circuit Board/Schematic Diagrams and Parts List
C322
82pF
L310
150nH
R308
R310
47
NU
R309
0
IF
CR306
4 3
1
2
2 1
3
T302 1 2 3
XFMR
6 4
R348 L309
3.6K 16.28nH
C320 C375
C319
7.5pF 100pF
1.8pF
L321 R333
C374
VCOBUF
NU NU
100pF
R349
0
3 C373
C378
NU
Q310 NU
NU
2
C372
R331
NU
NU
ZMY0130315-B