Motorola CP040 Detailed Service Manual page 176

3-8
128 mV (RF)
C4
C2 L1
15pF
36pF 68nH
2% 1%
1%
RX_IN
FE_RF_IN
C1 C3
22pF 47pF
1% 1%
SH1
SHIELD
1
VHF2 (146-174 MHz) Receiver Front End Schematic Diagram
5R
FE_5R
R20
6.8K
1%
Q22
UMT1
2
3.38V (Rx)
C20
R23
1000pF
22K
1%
C6
C5 L4 C8
15pF R26
3.0pF 68nH 30pF C22
1% 2% 0
3.3% 1% 1000pF
3
L2 L3 C7 C9
68nH 68nH 33pF
L21
NU
2% 2% 1%
NU
1 2
CR1
MMBD352
SH40
SHIELD
1
5.0V (Rx)
0V (Tx)
C26
R21
1000pF
3.95V (Rx)
100
1 4
5
3.95V (Rx)
6 3
C25
L22
1000pF
100nH
2.0V (Rx)
C99
R22
0.1uF
6.8K
3.9V (Rx)
700mV (RF)
C29 C31 L31
R24 10pF 30pF 68nH
2%
750 1.0% 1%
C23
1000pF
3
0.74V (Rx)
1
C30 C32
24pF 56pF
125 mV (RF)
2 1% 1%
Q21
BFS540
R25
C24
5.6K
NU
705mV (RF)
C41 L40
15pF 68nH
2%
1%
RX_INJ
FE_RF_INJ
C40
20pF
1%
VHF2 PCB 8486342Z13-C Schematic Diagrams
L32
C33 C35 L33
68nH
24pF 27pF 68nH
2% 2%
1% 1% 485mV (RF)
4 3
2
1
6
C34
C36
56pF
24pF
RF BALUN
5
1% 1%
T41 NC
4 3
L41 C43 2
445mV (RF)
68nH 15pF
2%
1%
6 1
IF BALUN 5
T42 NC NC
R40
C42 C44
1K
36pF 20pF
1% 1%
1
TP1
TP2
1
500mV (RF)
IF_OUT
L52
FE_IF_OUT
680nH
R51
51
L51 C51
150nH 82pF
NC
1
IO1
IO3 IO4
3
4
IO2
2
CR41
HSMS2829