Troubleshooting Charts:
Power-Up Failure
5-7
Power-Up Failure – Low LDO3 V_1.55 Voltage
Low
LDO3 V_1.55
Voltage
Measure Radio
Current
Inspect R6561
Connection
Measure V_2.23
at R6513
Likely MAKO Problem,
Replace Main Board
Is Standby Current
more than 15mA
above Average
2.0 < V < 2.4?
Is R6561
Soldered
Properly
Correct R6561
Soldering
Proceed to Low
V_2.23 Voltage
Flow Chart
Board has a short,
Replace Main 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: ......