Motorola APX 7000 - Advanced Features; GPS Operation; GPS Performance Enhancement; The Outdoor Location Feature (Using GPS)

5-26 Troubleshooting Charts: VOCON TX Audio Error
5.11 VOCON TX Audio Error – Tweeter Speaker Failure
No audio out of Tweeter
Speaker
Isolate Location of
Failure, Replace
Front LCD and
Speaker Unit
Is Tweeter
Speaker
Functional
Replace front LCD
and Speaker Unit
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 R6416
and R6417
Yes
No
No
Yes
Yes
No
No
Yes
Is an Audio
Signal Present
Measure PCB
Pads at P6401
Inspect PreAmp
Filter
Are Values,
Placement, and
Solder Connections
ok
Is Audio Signal
Present
Repair or Replace
Parts
Replace VOCON
Board
No
Yes
Yes
No
Repair Pogo Pins
P6401
Replace VoCon
Yes
No