Figure 8-8. Vhf Transceiver (Rf) Transmitter Circuit - Motorola ASTRO XTSTM 4000 Detailed Service Manual

Schematics, Board Overlays, and Parts Lists – VHF: Transceiver (RF) Section
C136
910pF
TX5V
R120
1K
RT150
33.0K
C137
RAWB+
910pF
XB+
Q102 V5A
R121
390 R122
TXRF
110
RSTL
SPCK
MOSI
USEL
C135
910pF
U103
LM50
6871620L01-C
RAWB+
V5A XB+ RAWB+
C103 C108
BLM21PG221SN1
E101
.01uF .01uF
C104 C110
910pF 910pF
BLM11A601S L102
C101
E104 1uH
C111
910pF
16 6
RFIN RFOUT1
1 7
L101 VCNTRL RFOUT2
470pF
14 2
VD1 VG1
C112
11 3
6.8nH
G2 VG2 5.1pF
U102
8
C102 SRFIC5668
NC1
9
NC2
10
NC3
56pF
15
NC4
C106 C107
910pF 910pF
C105
910pF
Vc
V5A
R135
0
R136 R111
C128
NU 470K
910pF
C129
2
VOUT 1500pF
NC
C140
910pF
C130
470pF
C131
.015uF
D104
A1
1 K2 6
2 5
NC NC1 NC2 NC
3 4
A2
K1
MBD330DWT1
R130
0.15
TVDD
C117 C118 C119 L105
1uF .01uF 470pF 23.75nH
L106
C116
11.03nH
0.1uF C120
27pF
R109
NU
C115
C113
L104
1 G
22nH
30pF 82pF
Q107
L103 C114
4816698H02
33nH 13pF
R102
1K
R105
10K
C127
TP111 R106
910pF
TEST_POINT 47K RAWB+
E105
RAWB+
R118
0
NC
1 24
RFIN VAR3
2 23 RXH
T1 RX
3 22
CI NA NC
4 21
INT RS
U104
5 20
CJ H99S4 VAR1 NC
6 19
5185765B26
VL VLIM
7 18
CL VAR2
8 17
GND1 V5EXT
UNSW_B+
UNSW_B+
R119
0 R117
10
C132 C133 C134
0.1uF 1uF .01uF
C123
7.5pF
C125
L107 L108
POUT
1.65nH 23.75nH
470pF
C121 C122
27pF 27pF
C124
18pF
Q101
V5A TX5V
Q104
NTR1P02T1
C144
910pF

Figure 8-8. VHF Transceiver (RF) Transmitter Circuit

8-9
POUT
TX5V
VAR3
VAR2
May 28, 2008