Motorola CP040 Detailed Service Manual page 193

VHF2 PCB 8486769Z04-C/Z05-D Schematic Diagrams
IF_BAND_SEL
BW_SE L
5V
8
U52-4 VCC
PWR_GND
GND
4
5V
IF_5V
5V
IF_IN
3 IN
IF_IN
2 CC1
C52
5 CC2
22pF
C53
9.1pF
1.1%
R61
100K
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 3
OUT 6 1
0.74V
120pF
2
Q51
C93
R52
PBR941
12K
3.6pF
NU
1 4
RX Back End (Overtone)
1 7
C68
U52-1
R65
TC7W04F 39K
0.1uF
5V
U52-2
TC7W04F
6 2
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
6
51
C91
C90 C92
0.1uF
0.1uF 10uF
C58
3.05V
L54
3.9pF
R57
C57 C59
1.2uH
4.7K
2%
0.1uF 2.7pF
C60
CR51
3
C81 C80
0.1uF R80
5.1K
33pF 22pF
1%
1 2
Y51
TSS2_44_395MHZ
R81
1K
44.395MHz
C82
3
OU T
36pF
R82 GND1
L81
NU
1uH 4
VHF2 (146-174MHz) Receiver Back End Schematic Diagram PCB No. 8486769Z04-C/Z05-D
FL53
R66
CFWC455E 20K
1
IN OUT 2
3
4
R63
R64 D52
FL54
39K 20K
1
CFWC455G
3
1 IN OUT 2
2
R67
20K
3 4
C63
0.1uF
C67 5V
C65 C66
0.1uF
R72
0.1uF
0.1uF
390
3
Q70
1
MMBT3904
2
C70
R73
15 1.8K
U51
VCC GND
130pF
R74
SA616
1.2K
Y70
45B02
455KHz
1
3
R75
2.1V When -47 dBm @ antenna
12K
1%
R77 R78
1.5V
1
I N
8.2K 680 C73
1%
R76
4700pF
GND 12K
1%
2
3-25
C74
47pF
2
C71
0.1uF
IF_RSSI
RSSI
C72
0.1uF
IF_DEMOD
DEMOD