Uhf 403-440 Mhz Schematic Diagrams, Overlays, And Parts Lists; Figure 11-4. Uhf (403-440 Mhz) Pcb 8486635Z03-O Receiver Front End Schematic Diagram - Motorola EP450 Service Manual

11-6
Chapter 11 UHF 403-440 MHz Schematic Diagrams, Overlays, and Parts Lists
C2
IF1
RX_IN
18pF
C1
L1
1%
9.85nH
15pF
2%
1%
C27
9.1pF
1.1%

Figure 11-4. UHF (403-440 MHz) PCB 8486635Z03-O Receiver Front End Schematic Diagram

November 24, 2003
UHF R1 Front End
C523
0.55pF
5.5%
C3 C6
1.8pF 1.8pF
C5 C8
0
0
5.6% 5.6%
C4 C12
C7
L2 L3
9.85nH
9.85nH
NU 10pF NU
2% 2%
1.0%
C524
C32
C29 C31 C34
8.2pF 9.1pF 7.5pF 6.2pF
C28
1.2% 1.1% 1.3% 1.6%
15pF
C30 C33
C46
L31
1% L32
9.85nH
22pF NU 9.85nH 18pF
2%
2%
1%
1%
RX_INJ
5R
FE_5R
R21
R20
75
5.6K
Q22
UMT1
4
1
2 5
C20
6 3
390pF
C99
R23
R22
27K
0.1uF
5.6K
C23
R24
1.2K
390pF
C9
C11 C21
18pF
20pF
390pF
CR1
0.79V 1
1% 1% 10%
3
C10
Q21
R25
L21
5.6K
BFS505
27nH
13pF
1%
2
1
0.6pF
C37
6.2pF
C38
C35 1.6%
C48
1%
1%
0
16pF
12pF
C39
C47 C36 C49
L33
L34
9.85nH
16pF 9.85nH 12pF
NU NU
2%
1%
2% 1%
L41
C44
FE_RF_INJ C42
27nH
L40
27nH
10pF
10pF
C41 C43 C45
1.0%
1.0%
15pF 30pF 22pF
1% 1%
1%

UHF 403-440 MHz Schematic Diagrams, Overlays, and Parts Lists

C26
390pF
SH1 SH40
SHIELD SHIELD
C25
1
1
390pF
L55
18nH
C521
4.2V
L52
3.3pF
C522
3.0%
680nH
3
2.2pF
R51
4.5%
51
2
C51
L51
150nH
82pF
T41
RF BALUN
4 3
2 C14
2.4pF
6 1
NC
5 4.2%
NC
1
IO1
T42
3
4
IF BALUN
IO3 IO4
4 3
IO2
2
2
CR41
6 1
HSMS2829
NC
5
NC
R40
1K
1
TP1
TP2
1
FE_IF_OUT
IF_OUT
C13
2.4pF
4.2%
HKLN4216A