5-12
Troubleshooting Charts:
Power-Up Failure
Power-Up Failure – Low V_SW_3.6 Voltage
Low V_SW_3.6 Voltage
Measure Radio
Current
Measure the
Voltage at R6542
Inspect U6504 and
All Supporting
Circuitry
Replace Board
Is Standby Current
more than 15mA
above Average
Are Parts Solder
Connections and
Placement Correct
6 < V < 9?
Proceed to
Incorrect B+
Voltage
Replace or Repair
Part/s
Board has a short,
Replace Board
Yes
Yes
Yes
No
No
No
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: ......