Motorola CP040 Detailed Service Manual page 112

3-6
128 mV (RF)
C2
L1
36pF 68nH
2%
1%
RX_IN
FE_RF_IN
C1
22pF
1%
VHF1 (136-162 MHz) Receiver Front End Schematic Diagram (8486769Z02-A)
5R
FE_5R
3.38V (Rx)
C20
1000pF
C4 C6
C5 L4 C8
15pF 15pF R26
3.0pF 68nH 30pF
0
1% 1% 2%
3.3% 1%
3
C3 L2 L3 C7 C9
47pF 68nH 68nH 33pF
NU
1% 2% 2% 1%
1 2
CR1
MMBD352
SH1 SH40
SHIELD SHIELD
1 1
5.0V (Rx)
0V (Tx)
R20
6.8K
1% C26
R21
1000pF
3.95V (Rx)
100
Q22
1 4
UMT1
2 5
3.95V (Rx)
6 3
C25
L22
1000pF
2.0V (Rx) 100nH
R23
C99
R22
22K 0.1uF
6.8K
1%
3.9V (Rx)
700mV (RF)
C29 C31 L31
R24 10pF 30pF 68nH
2%
750 1.0% 1%
C23
C22
1000pF
3
1000pF
0.74V (Rx) 1
C30 C32
24pF 56pF
125 mV (RF)
2 1% 1%
Q21
BFS540
R25
L21 C24
5.6K
NU NU
705mV (RF)
C41
15pF
1%
RX_INJ
FE_RF_INJ
C40
20pF
1%
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 NC
4 3
2
L40 L41 C43 445mV (RF)
68nH 68nH 15pF
2% 2%
1%
6 1
IF BALUN 5
T42 NC NC
R40
C42 C44
1K
36pF 20pF
1% 1%
1
TP1
TP2
1
VHF1 PCB 8486769Z02-A Schematic Diagrams
500mV (RF)
IF_OUT
L52
FE_IF_OUT
680nH
R51
51
L51 C51
150nH 82pF
1
IO1
IO3 IO4
3
4
IO2
2
CR41
HSMS2829