Vocon Tx Audio Error - Motorola APX 7000 Detailed Service Manual

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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
View SSI Signals
at R1004, R1005,
and R1006 Using
an Oscilloscope
Is Data Present
View SSI Audio
Data at R3015
Using an
Oscilloscope
Is Data Present
Measure PreAmp
Filter at R6416
and R6417
Is an Audio
Signal Present
Yes
Replace front LCD
and Speaker Unit
No
Inspect Connector
No
to J1001 on
VOCON board
Yes
No
Replace VOCON
Board
Yes
Inspect PreAmp
Filter
No
Measure PCB
Pads at P6401
Yes
Troubleshooting Charts: VOCON TX Audio Error
Replace or Repair
Connector
Yes
No
Is Connector Damaged
or Soldered Improperly
Repair or Replace
Parts
Replace VOCON
Board No
Yes
Are Values,
Placement, and
Solder Connections
ok
Repair Pogo Pins
Yes
Is Audio Signal
Present
No
Replace RF Board
P6401
Replace VoCon