Vocon Rx Audio Error - Motorola APX 5000 Service Manual

5-28
5.11 VOCON RX Audio Error – External Audio
No audio out of External
Speaker
Replace
Expansion Board
Yes
Audio Signal
Present
No
View SSI Signals
at R1004, R1005,
and R1006 Using
an Oscilloscope
Is Data Present
Yes
View SSI Audio
Data at R3015
Is Data Present
Yes
Measure PreAmp
Filter at R6416
and R6417
Is Data Present
Measure Speaker
Lines on GCAI
Connector Using
Oscillscope
Measure Audio
at Vocon
Test Point
SPKR+ and SPKR-
Yes
Is Either Connector
Damaged or Soldered
Improperly
No
Replace or Repair
Connector
Inspect Connector
No
to J1001 on
VOCON board
No
Replace VOCON
Board
Inspect PreAmp
Filter
No
Inspect Connector
J4001
Yes
Troubleshooting Charts: VOCON RX Audio Error
Yes
Audio Signal Replace External
Present
No
Measure Audio
Signal at Expansion
Board R2013 and
Examine VOCON
No
and GCAI
Connector on
Expansion Board
Replace or Repair
Connector
Yes
No
Is Connector Damaged
or Soldered Improperly
Repair or Replace
Parts
Replace VOCON
No
Board
Yes
Values,
Placement OK?
Yes
Connector Damaged
No
Speaker
R2014
Yes
Replace Housing
Audio Signal
and GCAI Board
Present
Replace RF Board
Replace or Repair
Connector
Replace
VoCon Board