Motorola Commercial Series Service Information page 42

4-10
0 V (Rx)
R171
TX_ENA
PA_TX_ENA 6.8K
1.8V (Tx)
5T
PA_5T
C100
820 mV (RF)
1500pF
TX_INJ
PA_TX_INJ
R101
18
R100 R102
300 300
VHF (136-162 MHz) Transmitter and Power Control Schematic Diagram
USWB+
PA_USWB+
7.4 V (Rx)
3
0.15 V (Tx)
1
Q171
MMBT3904 Q170
EMB10
2
R524
10K
C156
.01uF
2.5 V (Low)
3.0 V (Hi)
TP150
1
2.4 V (Hi)
1.06 V (Low)
PWR_SET
PA_PWR_SET
R110
360
R107
C109 C114 R106 L100 C111
150
NU
0.1uF 1500pF 4.7K 560nH
1500 mV (RF)
C102
0.1uF
4.9 V (Tx)
L101
C103
1500pF 560nH
R105
1.2K 1.5 V (Tx)
C105
3
NU
1
Q100
BFS540
L102
2
100nH
R103
3.3K
C171
C104 2.7pF
NU
R104 C101 C108
51 1500pF 0.1uF
SH100
SHIELD
1
7.5 V
C170
0.1uF
4 5 6
3 2 1
0 V (Rx)
7.25 V (Tx)
C172
1500pF
0 V (Rx)
C157
0.1uF
7.3 V (Tx)
C154
1500pF
C155
0.1uF
R158
C151
1.5K
1500pF
3 8 6
Q150
1 7
5
R157 4
2
5.6K
8 2
U150-2
1
LM2904
3
C152
4
1500pF
U150-1 C159 R156 C153
1500pF 330 0.47uF
LM2904
R162
10K
C158
1500pF
C113
2.5 V (Low) 1500pF
L110
3.0 V (Hi)
560nH
R111 C110 C112 VR110
0.1uF 1500pF 4.3V
NU
DO NOT MEASURE
3
2
L103 C106
30nH
1500pF
1 4
RFIN RFOUT
C117
1100 mV (RF)
1000pF
5
C107
U110
10pF RA07M1317M_VHF
R152
100K
1%
R153
100K
1%
U151
C150
57R01
1500pF
R154 R151
100K 22
1% R150
R155
0.1
100K
1%
R120
C120
150
1500pF
R121
150
0 V (Rx)
1.6 V (Tx)
C115 C116
1uF 0.1uF
L120 C121
560nH 1500pF
C131 C133 C135
10pF 10pF
2.4pF
C137
200pF
L131 L132
L130
D120
43.67nH 43.67nH 43.67nH
MA4PH261
C130 C132 C134 C136
15pF 15pF 13pF 6.2pF
C140
16pF
0 V (Rx)
L121
0.9 V (Tx)
47nH
RX_OUT
PA_RX_OUT
C124
1500pF
C122
15pF
D121
C123
MA4PH261
20pF
C141
22pF
VHF PCB 8486769Z02-A Schematic Diagrams
S1
S2
G1
G2
T1
T2
J140
M140
ANTENNA_NUT
1 3
TAB1 TAB3 NC
2 4
NC TAB2 TAB4 NC
L140
30.54nH