Figure 6-4. Vhf (146-174 Mhz) Pcb 8486342Z13-C Receiver Front End Schematic Diagram - Motorola EP450 Service Manual

6-6
Chapter 6 146-174 MHz Schematic Diagrams, Overlays, and Parts Lists
SH1 SH40
SHIELD SHIELD
1 1
C4
C2
L1
36pF 15pF
FE_RF_IN
68nH
RX_IN
2%
1% 1%
C1
C3
47pF
22pF
1% 1%

Figure 6-4. VHF (146-174 MHz) PCB 8486342Z13-C Receiver Front End Schematic Diagram

November 24, 2003
FE_5R
5R
6.8K
2
C20
1000pF
C5 C6 C8
L4
3.0pF 15pF 30pF
68nH R26
2%
0
3
3.3% 1% 1% 1000pF
C7
C9
L2 L3 L21
68nH 68nH
NU
33pF NU
2%
2%
1%
1 2
CR1
MMBD352
VHF R2 Front End
R20 C26
R21
100
1% 1000pF
1 4
5
Q22
UMT1
C25
3 L22
6
100nH
1000pF
R23
22K
C99
R22
1%
6.8K
0.1uF
C31
L31
30pF
C23 C29
R24
68nH
2%
750
20pF 1%
1000pF
C30 C32
3
C22 1%
0.74V
1
24pF 56pF
Q21
1% 1%
BFS540
C24 2
R25
5.6K
NU
FE_RF_INJ
C41
RX_INJ
15pF
C40
1%
20pF
1%
146-174 MHz Schematic Diagrams, Overlays, and Parts Lists
R51
51
C51
L51
150nH
82pF
L32 L33
C35
C33
68nH 68nH
4 T41 3
2%
2%
2
24pF 27pF
C34 C36
1%
1%
6 1
56pF 24pF
RF BALUN
1% 5
1%
NC
T42
3
4
2
L40 L41
C43
68nH 68nH
1
6
2%
2% IF BALUN
5
15pF
C42 C44 NC
1% R40
1K
36pF 20pF
1% 1%
1
TP1
TP2
1
FE_IF_OUT
L52
IF_OUT
680nH
CR41
NC
HSMS2829
1
IO1
3
4
IO3 IO4
IO2
2
NC
HKLN4216A