Troubleshooting Charts:
Volume/Channel Error
5-23
5.6
Volume/Channel Error
Volume / Channel Error
Is voltage level
1.85V when
rotating switch?
Refer troubleshooting
guide 5.4.4
Yes
No
Replace Keypad flex
No
Observe if any noise
on waveform
Yes
Verify all connectors from
J2302 to frontkit flex are good.
Remove SH13
Probe TP2111 and
TP2110 with scope
Is noise
present?
Check U21000,
U21001, U21002 and
U21003 circuitry.
Verify if VCC_1.85 present
on keypad at TP2005
Is 1.85V
present?
Replace frontkit flex
No
Is V_Ext_1.85
present at C2116?
Yes
No
Yes
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: ......