6871620L01-C
May 28, 2008
Radio Power:
DC Power Routing—VOCON Section
2-3
The digital circuits in the VOCON section are powered from regulators located in the MAKO IC
(U1304). The MAKO IC provides five supplies: VSW1, V2, V1.55, V1.875 and VCC5. These
regulators are software programmable except for VCC5.
lists the supply voltages and the
circuits that use these voltages.
Table 2-3. VOCON Section DC Power Distribution
Supply
Name
Output
Voltage
Supply Type
Unprogrammed
Output Voltage
Circuits Supplied
9 to 6 Vdc
7.5 Vdc
nominal
Battery
N/A
MAKO IC
5V Misc. Regulator
SW_B+
9 to 6 Vdc
7.5 Vdc
nominal
Battery
N/A
MAKO
XCVR 5V Regulator
CE Interface
Encryption Module
VCC5
5Vdc
Linear
Regulator
N/A
MAKO Int. / ext. microphone
bias
MAKO Audio preamplifier
VSW1
3.8 Vdc
Switching
regulator
software
progammable
3.2 Vdc
3-V regulators (XCVR)
VSW2 input
V2 input
V1.875
1.875 Vdc
Switching
regulator
software
progammable
1.9 Vdc
Patriot core
FLASH IC
SRAM
Display module
V2
2.9 Vdc
Linear
regulator
software
programmable
2.775 Vdc
Patriot I/O ring
Display module
16.8 MHz buffer
V1.55
1.55 Vdc
Linear
regulator
N/A
Patriot core
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: ......