Schematics, Board Overlays, and Parts Lists – UHF
: Transceiver (RF) Section
9-5
6871620L01-C
May 28, 2008
9.4
Transceiver (RF) Section
Figure 9-4. UHF Transceiver (RF) Board Overall Circuit Schematic
RSTL
VSW1
X
LOCK
TXFS
TXCK
TXTD
F168
FUB+
RAWB+
RXDO
RXFS
RXCK
ABCS
USEL
SPCK
MOS
I
RAWB+
VSW1
XB+
FUB+
TXFS
TXCK
TXTD
USEL
SPCK
MOS
I
LOCK
LOCK
SCEN
SSCK
SSFS
SSTD
V3A
V5A
CLK
CSX
DATA
V3A
V5A
A500
RX_BE
CLKOUT
DOUTA
ADC
CKO
LO
FREF
FS
PC
PD
PE
RX
I
F
V3D
V5A
V5A
V3D
ABCS
SPCK
MOS
I
100pF
C1719
RXDO
RXFS
RXCK
USEL
SPCK
MOS
I
V5R
V5R
RX
I
F
A400
RX_FE
DAC2
LO
I
N
RX
I
N
RX
I
F
TXRF
USEL
A100
TX_ALC
V5A
XB+
MOS
I
SPCK
RAWB+
RSTL
TX
I
NH
XB+
RAWB+
V5A
NC
VAR2
TX5V
VAR3
POUT
RXLO
RXRF
TX5V
TXRF
V5A
VAR3
A700
SW_FL
ANT
V5A
TXH
ANT
C17
1
.
0uF
100pF
C9
LP3985
BYPASS
4
GND
2
VEN
3
V
I
N
1
VOUT
5
V3D
U2
L10
100uH
100K
R1708
VSW1
C16
.
01uF
NTR1P02T1
Q4
V5A
1
.
0uF
C15
C10
100pF
V5R
100K
R1709
C30
10uF
10uF
C14
F168
RXLO
A200,
A300
FGU
TXRF
SENSE
SHUTDOWN
BYPASS
ERROR
GND
I
NPUT
NC
OUTPUT
.
01uF
C13
6
8
1
7
3
4
2
5
NC
LP2989
I
MMX-5
.
0
LP2989
U1
MBRM140T3
D1
C11
0
.
10uF
BK1005HM471
E5
2
.
2
uF
min
.
C12
10uF
XB+
TXH
VEN
1
V
I
N
5
VOUT
LP3985
U3
4
BYPASS
2
GND
3
.
01uF
C26
C25
1
.
0uF
MBRM140T3
D3
VSW1_fi
l
tered
C27
1
.
0uF
C28
100pF
D2
MBRM140T3
V3A
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
Page 2: ......
Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
Page 209: ......