Figure 9-8. Uhf Transceiver (Rf) Transmitter Circuit - Motorola ASTRO XTSTM 4000 Detailed Service Manual

Schematics, Board Overlays, and Parts Lists – UHF: Transceiver (RF) Section
C136
100pF
TX5V
R120
100
0613952Q49
C137
RT150
100pF
33.0K
RAWB+
XB+
Q102
V5A
R121
360
R122
0613952Q62
10 TXRF
0613952Q25
RSTL
SPCK
MOSI
USEL
V5A
C135
100pF
R135
0
2
VOUT
U103
LM50
6871620L01-C
RAWB+
E101
BLM21PG221SN1
0.10uF C145
R130
0.1
V5A XB+ RAWB+ .01uF C108
C103
.01uF
C146
0.10uF
100pF C110
C104
100pF
E103
BLM18PG121SN1
C101
BLM11A601S
100pF
E104
L102
L113
180nH
2414032D18 10nH
2414017G07
16 6
L101
RFIN RFOUT1
15nH 1 7
2414017G09 VCNTRL RFOUT2 C111
14 2
100pF
VD1 VG1
C112
11 3 L103
G2 VG2 5.1pF 33nH
C102
U102 NP NP
100pF
8 SRFIC5668
2113944C45
NC1
9
NC2
10
NC3
15
NC4
C107
C106
TP111
100pF
100pF
C105 TEST_POINT
100pF
Vc
NC
C128
R136 R111
100pF
NP 470K
C129 1
RFIN
1500pF
2
NC T1
3
CI
4
INT
5
CJ
6
VL
C140
7
100pF CL
8
C130
GND1
470pF
C131
D104 .015uF
1 A1 K2 6
2 5
NC NC1 NC2 NC
3 4
A2
K1
MBD330DWT1
TVDD
C119
L105
C118
C117
100pF 23.75nH
.01uF
1uF
2113944C45 2479990E01
C116
C120 C121
0.1uF
6.8pF
6.8pF
R109 NP
2171741M05
150
R137 0613952H53 NP
0
0613952G67
1 G
R138
0 Q107
0613952G67
C114
4816698H03
39pF
2113944C37
R102
47
R105
18K
C147 C127
R106
0.10uF 100pF
10K
RAWB+
RAWB+
E105
C148
0.10uF
Rb=4.7K, Re=inf
MUN5316DW1T1G
Q101
24
VAR3
23 RXH
RX
22
NA NC
21
RS
U104
20
H99S4 VAR1 NC
19
5185765B26
VLIM
18
VAR2
17
V5EXT
UNSW_B+
UNSW_B+
R117
R119
10
0
C132 C133
0.1uF 1uF
C134 C149
.01uF 0.10uF
C144
100pF
C123
2.7pF
2113944C16
C125
100pF
2113944C45
POUT
L108
5.4nH
2415428H04
C141 C122
C124
39pF 27pF 15pF
V5A TX5V
TX5V
Q104
NTR1P02T1
VAR3
VAR2

Figure 9-8. UHF Transceiver (RF) Transmitter Circuit

9-9
POUT
May 28, 2008