Figure 4-40: Uhf (450-512 Mhz) Receiver Back End Schematic Diagram - Motorola PR860 Detailed Service Manual

4-50
44.85MHz
L311
560nH
3 IN
IF
2 CC1
C324
5 CC2
20pF
C325
1
9.1pF
Figure 4-40: UHF (450–512 MHz) Receiver Back End Schematic Diagram
BW_SEL
R314
1.6K
R5
C326 R313
0.1uF 330
R312
4.7K
FL301 C327
R311
22M11 0.1uF
33K
L330
680nH
6
OUT
Q302
C338
R315
NU
12K
4
SH322
IFIC SHIELD
1
U302-1
TC7W04F
1 7
C352
0.1uF
5V
R355
100K
U302-2
TC7W04F
6 2
C362 CR312
0.1uF
3
1
R350 R358
10K 1K
C357
0.1uF
FL302
CFUCJ455E
1 OUT 2
IN
3
R344
51
5V
C348 C382 C344
0.1uF 10uF 0.1uF
C360
3.3pF
C361 C366 L332 R359
0.1uF NU
1.2uH NU
CR311
C355
0.1uF
C385
24pF
R322
1K
44.395MHz
SH323
Xtal Filter SHIELD 1
IN
R320 C364
24pF
NU
1
2
L325
1uH
Schematic Diagrams, Overlays, and Parts Lists: UHF Band 2
5V
R345 R360
39K 20K
FL303
U302-4
CFWC455E 8
PWR_GND
1 OUT 2
IN
VCC
GND
4
4
3
R321 R324 CR313
FL304
2
1
12K 120K
CFWC455G
3
1 OUT 2 2
IN
R361
20K
3 4
C329
0.1uF
C347 C345 C343
C346
0.1uF 0.1uF 5V
0.1uF 0.1uF
R363
390
Q320
U301
SA616
C351
R364
VCC GND
120pF
6 15 1.8K
R365
1.2K
1 2
Y301
3
45B02
455KHz
R366
C367
R346
30pF
15K
R368
R369
DISC_OUT
Y300 10K 680
45J84
C334
R367
4700pF
OUT 3
12K
4
U302-3
TC7W04F
3 5
NC
C349
0.1uF
12K
RSSI
C350
0.1uF
DISC_OUT