Troubleshooting Charts:
Power-Up Failure
5-9
Power-Up Failure – Low VBUS2 Voltage
Low
VBUS2 Voltage
Measure V_SW_5
at C6567.
Measure VBUS2
Supply Voltage
at R6536
Repair Incorrect Parts
Replace Part
Replace Board
5.1 < V < 5.6?
Is Part Placed
Correctly
Are Parts Solder
Connections and
Placement Correct
Check Placement
of Q6508
Proceed to Low
SW5 Voltage Flow
Chart
Yes
Yes
Yes
Yes
No
No
No
Inspect U6503 and
Supporting Circuitry
Summary of Contents for APX 2000
Page 1: ...APXTM TWO WAY RADIOS APX 1000 APX 2000 APX 4000 APX 4000Li DETAILED SERVICE MANUAL ...
Page 4: ......
Page 6: ...iv Document History Notes ...
Page 8: ...Notes vi Commercial Warranty ...
Page 10: ...Notes ...
Page 22: ...xiv List of Figures Notes ...
Page 226: ...6 64 Troubleshooting Waveforms LF CW on Spectrum Analyzer Notes ...
Page 688: ...Index 4 Index Notes ...
Page 690: ...ii Notes ...
Page 700: ...xvi List of Figures Notes ...
Page 806: ...5 50 Troubleshooting Charts PA Failure Notes ...
Page 1008: ...8 178 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 84012621001 Notes ...
Page 1062: ...8 234 Schematics Boards Overlays and Parts Lists Keypad Board M2 and M3 PC000261A01 Notes ...
Page 1064: ...ii Notes ...
Page 1068: ...Notes A 4 EMEA Warranty Service and Technical Support Further Assistance From Motorola ...
Page 1090: ...Glossary 10 Glossary Notes ...
Page 1094: ...Index 4 Index Notes ...
Page 1095: ......