Figure 12-17. Uhf (438-470 Mhz) Receiver Back End Schematic Diagram (8486348Z09-A) - Motorola CP150 Service Manual

UHF (438-470 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486348Z09-A)
482 mV (RF)
IF_IN
C52
18pF
6880309N62-C
R61
100K
3V (25kHz)
0V (12.5kHz)
BW_SEL
5V
3.39V
5V
R91
1.6K
C56 R55
330
0.1uF
R53
500 mV (RF)
33K
3.05V
C55 R54
0.1uF 4.7K
L53
296 mV (RF)
3
680nH
3 OUT 6 1
IN
C57
0.1uF
370 mV (RF)
2 CC1 2
0.74V
C93 Q51
5 CC2
3.6pF
PBR941
R52
12K
1 4
FL51
MXF45
C53
44.85MHz
9.1pF
1.1%
SH50 SH52
SHIELD SHIELD
1 1
0 V (25 kHz)
5 V (12.5 kHz)
5 V (25 kHz)
0 V (12.5 kHz)
1 7
R65
U52-1
39K
TC7W04F
C68 FL53
CFWC455E
0.1uF
1 IN OUT
5V
1 V (25 kHz)
0 V (12.5 kHz)
3 4
6 2
U52-2
R63
TC7W04F
39K
FL54
C69 0.33 V
2 CFWC455G
0.1uF
3 1 IN OUT 2
1
D51
0 V (25 kHz)
R62 1 V (12.5 kHz)
3.3K
3 4
R60
2.4K
C62
167 mV (RF)
128 mV (RF) FL52
FLTR
0.1uF
1 IN OUT 2
C64
0.1uF
C65
0.1uF
3
9186471Z01
108 mV (RF)
5V
VCC
6
R90
51
C90
C91 C92
0.1uF 0.1uF
10uF
C58
3.9pF
L54
C59 R57
2.7pF 1.2uH 4.7K
2%
3
280 mV (RF)
C60
1 2
0.1uF
CR51
R80
C80
15K
30pF
C81
30pF 1%
1%
Y51 R76
R81
06B09 44.395MHz
12K
3 1 1%
OUT IN
R82
500 mV (RF)
0
C82
NU
L81
NU

Figure 12-17. UHF (438-470 MHz) Receiver Back End Schematic Diagram (8486348Z09-A)

R66
20K
5V
2
8
2.8 V (25 kHz) 3
0 V (12.5 kHz)
VCC
GND U52-3
TC7W04F
4
U52-4
PWR_GND
R64
20K
1
2.14 V
3
2
D52
0 V (25kHz)
R67
2.8 V (12.5 kHz)
20K
C63
17.5 mV (RF)
5V
0.1uF
C67
R72
0.1uF
390
C66
0.1uF
Q70
MMBT3904
3
1.23V
1
0.62 V
2
167 mV (RF)
U51
SA616
C70
130pF
GND
R73
15
1.8K
R74
1.2K
1 2
Y70
3
45B02
455KHz
C71
0.1uF
2.1V @ -47 dBm @ antenna
RSSI
R75
12K
C72
0.1uF
100 mV RMS (25 kHz)
50 mV RMS (12.5 kHz)
1.5V
DEMOD
R77
R78
8.2K
680
1%
C73
4700pF
12-23
5
NC
June, 2005