5-18
Troubleshooting Charts:
DC Supply Failure
DC Supply 1.85 Volt Failure
Yes
No
Yes
Voltage 3.6V?
Verify BGAP_COMP
is present.
2.2 < V < 2.7?
Check BGAP_COMP
circuitry
Check if U6101,
U6405, U6301 and
U6304 is draining
high current
Check for damage
to Q6507
Check for connector
damages from J2301 to
frontkit flex
Check if keypad is
draining high
current.
Verify V_SW_3.60 is
present at R6510
Replace main board
Refer troubleshooting guide
5.4.2 DC supply 3.6V
V_EXT_1.85
No
Check U6508
circuitry
Check BGAP_COMP
circuitry
Check if U6302 is
drawing high
current thru E6501
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: ......