5-16
Troubleshooting Charts:
DC Supply Failure
5.4.2
DC Supply 3.6 Volt Failure
V_SW_5
Is fuse intact
(not blown)?
Replace Fuse
Verify at
test point: F
Verify L200, C202
and C203 is good
Verify SW_B+
at C6524
Is 6 < V < 9
Verify Q6501
Check U6504 circuitry.
Enable input
present?
Check U6508 loading
V_SW_3.60
MAKO damaged. Replace
MAKO
Is radio current
>100mA
Check U201 is loading
V_SW_3.60
Yes
Yes
Yes
Yes
Yes
No
No
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: ......