Transmisor Vhf2 (146-174 Mhz) (Hoja 2 De 2) - Motorola EM200 Serie Manual De Servicio

Esquema eléctrico de la tarjeta de circuito impreso 8488977U01 del radio VHF 1-25 W banda 2 (rev. P8)
DNP
R111
1.K
C1055
R101
1n
0.
DNP
DNP
R110
1.K
C1058
L117
1n
1019447
L115
C1002 C1003
18.0n
470.0p 470.0p
Q100
GND1
GND2
G
C1005
150.p
IF113
INTEGRATOR DET_VRVS
Final_cur_sense
D102
C1050
1n
R114
LM2904
10.K
U102
4
5
7
6 8
R113
10.K
FILT_SW_B+_PA
C1056
1n
C1073
1n
R112
R115
100.K
10.K
R116
10.K
Coupler
R104
120.
width 2.032
L116
7.5
V_forward
18.0n
DNP
C1004 C1008 C1009 C1021 C1013 C1019
C1007
100.p 100.p 120.00p 10.p 56.p
150.p 13.p
D105
R160
R5101
3.3K
IF111 100.
1
DET_VFWD
R118
100.
C1101
C1080
100.p
1n
3.3K
R161
D106
R162
3.3K
IF112
1
R163
R5102
C1079
3.3K
100.
1n
C1102
D108
100.p
R135
43.K
U103
R145
MC3303 4
22.K
14
11
V_REF_OPAMP
DNP
R132
100.K
DNP
Final_cur_sense
R177
100.
C1025
4.7p
V_reverse
C1011
L113
68.p
D104
48.0n
DNP
C1018 C1023 C1022
16.00p 20.p 6.8p
R103
120.
PA_FILT_B+
R185
10.K
R119
100.
Place near both sides of PA shields
VR102
C1035
5.6
22n
R172
470.
Q103
V_reverse
D107
R120 R121
100. 100.
U103
MC3303
11
3
1
R142 4 2
22.K
R143
22.K
R156
10.K
R148
22.K
13
12
C1051
1n
IF100
1
DNP
C1095
220.p
C1024
4.7p
L112
L111
48.0n
48.0n
J11-1
J11-2
DNP
L126
R150
J11-3
C1016 C1017 1.2u
C1020 10.K
12.p 33.p 22.p J11-5
J11-4
L114
48.0n
R108 L108
51.000 1.20u IF101
1
D103
C1108
DNP
R107 68.p
C1121
51.000
6.8p
C1010 C1006
100.p 150.p
Q106
IF102
R157
56.K
C1130 C1067 C1077
220.p 1n
1n
IF103
1
R149
22.K DNP
C1091
C1059
FLT_9V
1n 1n
R151
5.6K
L103
1.u
PA's Temp. Sensor
C1052
RT100
1n
47.0K
73D02968C63-0
SHEET 2 OF 8

Transmisor VHF2 (146-174 MHz) (hoja 2 de 2)

4-9
PA_CURRENT
1
2
3
G2
G1
RX
TX_EN
PWR_SET