5-8
Troubleshooting Charts:
Power-Up Failure
Power-Up Failure – Low LDO8 V_5.0A Voltage
Low
LDO8 V_5.0A
Voltage
Measure Radio
Current
Inspect R6565
Connection
Measure Voltage
at C6593
Likely MAKO Problem,
Replace Main Board
Is Standby Current
more than 15mA
above Average
6.0 < V < 9.0?
Is R6565
Soldered
Properly
Correct R6565
Soldering
Proceed to
Incorrect B+
Voltage Flow
Chart
Board has a short,
Replace Main Board
Yes
Yes
Yes
No
No
No
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: ......