5-4
Troubleshooting Charts:
Power-Up Failure
5.3
Power-Up Failure – Main Board
Main Board Power Up
Problem
Measure Voltage
at C6593
6 < V < 9?
Proceed to
Incorrect B+
Voltage Flow
Chart
Measure Voltage
at R6542
3.3 < V < 3.9
Proceed to Low
V_SW_3.60
Flow Chart
Use Oscilloscope
to Measure R6533
Freq = 24MHz
1.6 < V < 1.9
Inspect Y6501 and
All supporting
Circuitry
Repair or Replace
Part/s
Replace Main
Board
Are Parts Solder
Connections and
Placement Correct
No
Yes
Measure All Probe
Spots from Above
Table
Voltages =
Level
Proceed to
Specified Flow
Chart in Table
Measure Voltage
at R6203
1.6 < V < 1.9
Replace Main
Board
No
Yes
No
Yes
No
Yes
No
Yes
No
Use Oscilloscope
to Measure R6115
Yes
Freq = 32kHz
1.6 < V < 1.9
Replace Main
Board
Use Oscilloscope
and High
Impedance Probe
to Measure
C6602
Freq = 12MHz
1.3 < V < 1.9
Inspect Y6601
Circuit
Repair or Replace
Part/s
Are Parts Solder
Connections and
Placement Correct
No
Yes
No
Yes
No
Measure Voltage
at OMAP_RESET_TP
Yes
1.6 < V < 1.9
OMAP is Out of
Reset, Proceed to
Memory Flow
Chart
Yes
Replace
Main Board
No
Name
Ref
Description
Level V
Flow Chart
V_1.55
R6561
LDO Output
1.55±10%
Low LDO3 V_1.55 Voltage
V_2.775D
R6562
LDO Output
2.775±10%
Low LDO10 V_3.3 Voltage
V_2.775
R6563
LDO Output
2.775±10%
Low LDO10 V_3.3 Voltage
V_2.8_RF
R6564
LDO Output
2.8±10%
Low LDO10 V_3.3 Voltage
V_5.0A
R6565
LDO Output
5.0±10%
Low LDO8 V_5.0A Voltage
V_3.3
R6566
LDO Output
3.3±10%
Low LDO10 V_3.3 Voltage
V_3.0A
R6567
LDO Output
3.0±10%
Low LDO10 V_3.3 Voltage
V_SW_3.6
C6561
Switching Output 3.6±10%
Low V_SW_3.6 Voltage
V_EXT_1.85
R6570
LDO Output
1.85±10%
Low V_1.85 Voltage
V_SW_1.4
E6502
Switching Output 1.4±10%
Low V_SW_1.4 Voltage
Summary of Contents for Astro APX 3000
Page 1: ...APXTM TWO WAY RADIOS APX 3000 DETAILED SERVICE MANUAL ...
Page 2: ......
Page 4: ...Notes ...
Page 6: ...vi Document History Notes ...
Page 10: ...x Table of Contents Notes ...
Page 12: ...xii List of Tables Notes ...
Page 18: ...xviii List of Figures Notes ...
Page 22: ...xxii CommercialWarranty Notes ...
Page 46: ...3 20 Theory of Operation Main Board Notes ...
Page 84: ...3 58 Theory of Operation Bluetooth Notes ...
Page 208: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 222: ...7 14 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 282: ...8 60 Schematics Boards Overlays and Parts Lists Main Board Block UHF1 84012513001_A Notes ...
Page 390: ...8 168 Schematics Boards Overlays and Parts Lists Main Board Block VHF 84012512001_A Notes ...
Page 456: ...9 8 Debugging Fixture Powering up Covert Board Notes ...
Page 468: ...Glossary 10 Glossary Notes ...
Page 472: ...Index 4 Index Notes ...
Page 473: ......