Troubleshooting Charts:
DC Supply Failure
5-21
5.4.7
DC Supply 1.4 Volt Failure
Yes
Verify Q6501
Voltage
= 1.5V?
Yes
Voltage
1.8V?
Refer troubleshooting
guide 5.4.5
No
Verify
at test point:
F
Yes
Voltage
2.775V?
No
Check if U6302
draining high
current thru E6502
V_SW_1.4
Voltage
1.8V?
Yes
No
No
Verify L200, C202
and C203 is good.
No
Replace fuse
Check external
circuitry for U6507.
If good, change
U6507.
Yes
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: ......