Figure 11-31. Uhf (465-495 Mhz) Pcb8486634Z02-O Receiver Front End Schematic Diagram - Motorola EP450 Service Manual

11-42
Chapter 11 UHF 465-495 MHz Schematic Diagrams, Overlays, and Parts Lists
FE_5R
5R
SH1 SH40
SHIELD SHIELD
1 1
C2
IF 1
RX_IN
1.1%
9.1pF
C1
L1
9.85nH
8pF
2%
1.25%

Figure 11-31. UHF (465-495 MHz) PCB8486634Z02-O Receiver Front End Schematic Diagram

November 24, 2003
C523
6%
0.5pF
C3 C5 C6 C8
1.25% 1.3% 2.3%
4.3pF CR1
8pF 7.5pF 4.3pF
C4
C12 C7
2.3% L3
L2
9.85nH 9.85nH
10pF NU 9.1pF
2% 2%
1.0% 1.1%
C28 C29 C31
C32
1.6% 1.8% 1.6%
1.0%
10pF 6.2pF 5.6pF 6.2pF
C27 C30 C4 6
L32
L31
9.85nH
9.85nH
8.2pF 16pF NU
2%
2%
1%
1.2%
RX_IN J
UHF R3 Front End
R21
R20
5.6K 91
1 4
2 Q22 5
UMT1
C20
6 3
390pF
L55
R23
22nH
27K
C99
0.1uF
R22
5.6K
C23
R24
1.2K
390pF
3
C9 C11 C21
0.79V 1
Q21
1.6% 1%
6.2pF 390pF BFS505
3 68pF
C10
R25
L21
5.6K
33nH
2.7pF
3.7%
2
1
C524
6%
0.5pF
C34 C35 C37 C38
C48
1.6% 1.6% 1.2% 2%
0
6.2pF 6.2pF 8.2pF 5.1pF
C33 C47 C36 C39
L34
L33
9.85nH 9.85nH
24pF NU 18pF 2.7pF
2% 2%
1%
1% 3.7%
C42 C44
FE_RF_IN J
L40 L41
1.2% 1.1%
27nH 27nH
8.2pF 9.1pF
C41 C43
10pF 20pF
1.0% 1%
UHF 465-495 MHz Schematic Diagrams, Overlays, and Parts Lists
C26
390pF
C25
390pF
C521
4.2V
3.7%
2.7pF
C522
0.5pF
L52
680nH
R51
51
C51
L51
150nH
82pF
T41 3
4
2
C49
C14
6 1
NU
6.7%
RF BALUN
5
1.5pF
NC NC
1
IO1
3
IO3 IO4
T42
4 3
IO2
2
2
CR41
6 1
HSMS2829
IF BALUN
5
NC
C45 NC
R40
1K
15pF
1%
1
TP1
TP2
1
FE_IF_OUT
IF_OUT
C13
6.7%
1.5pF
4
HKLN4216A