Motorola EP450 Service Manual page 137

11-28
PA_USWB+
USWB+
PA_TX_EN A
TX_ENA
SH100
SHIELD
1
PA_PWR_SET
PWR_SET
PA_5T
5T
C109 C114
0.1uF 390pF
C103
390pF
C100
PA_TX_IN J 390pF
R101
TX_IN J
3.6nH
5.6
C104
R100 R102
820
820 10pF
Figure 11-22. UHF (438-470 MHz) PCB 8486348Z13-C Transmitter and Power Control
November 24, 2003
C170
4
390pF
Q171
Q170
EMB10
3
C171
390pF
R158
1.5K
C156
.01uF
8
1
1
TP150
U150-1
4
LM2904
R110
680
C111
R111
R106 R107
L100 2K
390pF
4.7K
NU 220nH
C102
0.1uF
L101
C105
220nH R105
Q100
2.7K 1
3.9pF
BFG540W
L102
2
4
C120
R103 3
3K NU
C101
R104
18
0.1uF
C108
390pF
UHF R2 Tx
5 6
2
1
C157
C154
0.1uF
390pF
C155
C151
390pF C150
0.1uF
390pF
3 8 6
Q150 1 7
5
2
4
R157
2
C152
U150-2
2.2K
3 LM2904
C159 C153 390pF
R156
330
390pF
0.47uF
R162
10K
C158
390pF
C113
390pF
L110
220nH
VR110
C112 C173
390pF
0.1uF
MM3Z3V9T1
3.9V
2
3
VGG VDD
C106 C117
L103 U110
1 4
RFIN RFOUT
5.1nH
RA07M4452M_UHF
390pF 390pF
C107
GND
NU 5
UHF 438-470 MHz Schematic Diagrams, Overlays, and Parts Lists
R152
1%
100K
R153
U151
100K
1%
57R01
R151
R154
100K 1%
39
R155
R150
100K 0.1
C172
1%
R120
390pF
150
R121
150
C115 C116
0.1uF C121
1uF
L120
390pF
220nH
C131 C133 C135
NU NU
NU
D120
C137
L130 L131 L132
17.02nH 17.02nH
17.02nH
MA4PH261
220pF
C130
C132 C134 C136
NU 6.8pF 6.8pF 4.3pF
C124
L121
RX_OUT
15nH
PA_RX_OU T
390pF
D121
C122 C123
3.9pF
5.1pF
MA4PH261
C141
NU
J140
4 S1
3 S2
L140
2 G1
5 G2
43pF
1 T1
6 T2
M140
ANTENNA_NUT
1 TAB3 3
TAB1 NC
2 TAB4 4
NC TAB2
NC
L141
30.54nH
HKLN4216A