Motorola VHF2 Service Information page 49

VHF2 1-25W PCB 8488977U01 (rev. C) / Schematics
R101
0.
DNP
L117
1019447
L115
C1002
18.0n
470.0p
Q100
GND1
GND2
G
IF113
INTEGRATOR
Final_cur_sense
D102
C1050
1n
R114
LM2904
DNP 10.K
U102
4
5
R111
7
1.K
6 8
R113
10.K
C1055 FILT_SW_B+_PA
C1056
1n
1n
C1073
1n
DNP
R110 R112
R115
1.K
100.K
10.K
C1058 R116
1n 10.K
R104
120.
C1003
470.0p width 2.032
L116
7.5
18.0n
DNP
C1005 C1004 C1008 C1009 C1007 C1021 C1013 C1019
150.p 150.p 100.p 100.p 120.00p 10.p 56.p 13.p
D105
R160
R5101
3.3K
IF111 100.
1
DET_VFWD
C1101
C1080
100.p
1n
3.3K
R161
D106
IF112
1
DET_VRVS
R163
R5102
C1079
3.3K
100.
1n
D108
R145
22.K
V_REF_OPAMP
DNP
R132
100.K
DNP
Final_cur_sense
R177
100.
C1025
4.7p
Coupler
V_reverse
C1011
L113
68.p
D104
48.0n
V_forward
DNP
C1018 C1023
16.00p 20.p
R103
120.
PA_FILT_B+
R185
10.K
R118 R119
100. 100.
Place near both sides of PA shields
VR102
C1035
5.6
22n
R172
470.
Q103
R162
3.3K
V_reverse
D107
C1102
R120 R121
100.p
100. 100.
U103
MC3303
11
3
1
R142 4 2
22.K
R135
R143
43.K
22.K
R148
U103
22.K
MC3303 4 13
14
12
C1051
11
1n
IF100
1
DNP
C1095
220.p
C1024
4.7p
L112
L111
48.0n
48.0n
DNP
L126
R150
1.2u
C1022 C1016 C1017 10.K
C1020
6.8p 12.p 33.p 22.p
L114
48.0n
R108 L108
51.000 1.20u IF101
1
D103
C1108
R107 68.p DNP
C1121
51.000
C1010 C1006 6.8p
100.p 150.p
Q106
IF102
R157
56.K
C1130 C1067 C1077
220.p 1n
1n
IF103
1
R149
DNP
22.K
C1091
C1059
FLT_9V
1n
1n
R151
5.6K
R156
10.K
L103
1.u
PA's Temp. Sensor
C1052
RT100
1n
47.0K
73D02968C63-0
SHEET 2 OF 8
VHF2 (146-174MHz) Transmitter (Sht 2 of 2)
4-9
PA_CURRENT
J11-1
1
J11-2
2
J11-3
3
J11-5
G2
J11-4
G1
RX
TX_EN
PWR_SET