5-28
Troubleshooting Charts:
VOCON TX Audio Error
VOCON TX Audio Error – Main Speaker Audio Out Failure
No audio out of Main
Speaker
Isolate Location of
Failure, Replace
Main Speaker
Is Speaker
Functional
Replace Main
Speaker
View SSI Signals
at R1004, R1005,
and R1006 Using
an Oscilloscope
Inspect Connector
to J1001 on
VOCON board
View SSI Audio
Data at R3015
Using an
Oscilloscope
Is Data Present
Is Connector Damaged
or Soldered Improperly
Replace or Repair
Connector
Replace RF Board
Is Data Present
Replace VOCON
Board
Measure PreAmp
Filter at R6414
and R6415
No
Yes
Yes
No
No
Yes
Is an Audio
Signal Present
Examine
Connector J3001
Inspect PreAmp
Filter
Are Values,
Placement, and
Solder Connections
ok
Repair or Replace
Parts
Replace VOCON
Board
No
Yes
Yes
No
Replace
Expansion Board
Is Speaker
Functional
Inspect Class D
PA and Supporting
Circuit on
Expansion Board
Are Parts Solder
Connections and
Placement Correct
Replace or Repair
Parts
Inspect Expansion
to VOCON
Connector
Is Connector Damaged
or Soldered Improperly
Replace
Expansion Board
Replace or Repair
Connector
No
Yes
No
Yes
No
Yes
Yes
No
Is Connector Damaged
or Soldered Improperly
Repair or Replace
Connector
Replace VOCON
Board
Yes
No
Summary of Contents for ASTRO APX 7000
Page 1: ......
Page 4: ...iv Document History Notes ...
Page 24: ...2 4 Radio Power DC Power Routing VOCON Board Notes ...
Page 98: ...3 74 Theory of Operation Global Positioning System GPS ...
Page 163: ...Troubleshooting Charts PA Failure 5 59 ...
Page 164: ...5 60 Troubleshooting Charts PA Failure ...
Page 276: ...7 58 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 318: ...8 42 Schematics Boards Overlays and Parts Lists Transceiver RF Boards VHF 700 800 Notes ...
Page 380: ...8 104 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 700 800 MHz Notes ...
Page 432: ...8 156 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 VHF Notes ...
Page 458: ...8 182 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF1 UHF2 Notes ...
Page 498: ...8 222 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 700 800 MHz Notes ...
Page 546: ...8 270 Schematics Boards Overlays and Parts Lists Transceiver RF Boards UHF2 VHF Notes ...
Page 606: ...8 330 Schematics Boards Overlays and Parts Lists VOCON Boards Notes ...
Page 638: ...Glossary 10 Glossary Notes ...
Page 643: ......