Motorola CP040 Detailed Service Manual page 113

VHF1 PCB 8486769Z02-A Schematic Diagrams
IF_BAND_SEL
BW_SE L
5V
8
U52-4 VCC
PWR_GND
GND
4
5V
IF_5V
5V
IF_IN
IF_IN
C52
22pF
C53
9.1pF
1.1%
5V for 25kHz
0V for 12.5kHz
U52-3
SH50 SH52
TC7W04F
SHIELD SHIELD
3 5
NC
1 1
R91
3.39V
1.6K
C56
0.1uF
R53
33K
C55
R54
FL51
MXF45
6.2K
44.85MHz
0.1uF
L53
6 1
3 IN OUT
0.74V
120pF
2 CC1
Q51
C93
5 CC2 R52
PBR941
12K
3.6pF
NU
4
1
RX Back End (Overtone)
7
1
C68
U52-1
R65
39K
TC7W04F
0.1uF
5V
U52-2
R61
100K TC7W04F
2
6
C69
D51
0.1uF
2
3
1
R62
3.3K
R60
2.4K
FL52 C62
FLTR
0.1uF
9180468V04
1 IN OU T 2
C64
C61
0.1uF
47pF
3
R55 5V
330
R90
51
C90 C91 C92
0.1uF
0.1uF 10uF
C58
3.05V
3.9pF L54
R57
C57 C59
1.2uH
4.7K
2%
0.1uF 2.7pF
3
C60
CR51
3
C81
0.1uF R80
2
5.1K
33pF
1%
2
1
TSS2_44_395MHZ
R81
1K
44.395MHz
C82
3
OU T
36pF
R82 GND1
L81
NU
1uH
4
FL53
R66
20K
CFWC455E
1
IN OUT 2
3 4
R63 D52
R64
FL54
39K
20K
1
CFWC455G
3
1 IN 2
OUT 2
R67
20K
3 4
C63
0.1uF
5V
C67
C65 C66
0.1uF
R72
0.1uF
0.1uF
390
3
1
MMBT3904
2
C70
R73
6 15 1.8K
U51
VCC GND
130pF
SA616
455KHz
1
C80
R75
2.1V When -47 dBm @ antenna
22pF
12K
1%
Y51
R77
R78
1.5V
1
I N
8.2K 680 C73
1%
R76
4700pF
GND
12K
1%
2
VHF1 (136-162 MHz) Receiver Back End Schematic Diagram (8486769Z02-A)
3-7
C74
47pF
Q70
R74
1.2K
Y70
45B02
2
C71
3
0.1uF
IF_RSSI
RSSI
C72
0.1uF
IF_DEMOD
DEMOD