Motorola ASTRO XTS 1500 - VOCON Receive Audio Troubleshooting Chart

6816985H01-B August 16, 2007
900 MHz Troubleshooting Charts: VOCON Receive Audio Troubleshooting Chart 6.5-17
6.5.18VOCON Receive Audio Troubleshooting Chart
Voltage >
7.0mVrms?
MAEPF-27347-O
Connections
OK?
Y
es
No
Y
1
es
Y
es
No
No
Radio has no
Transmitter
Deviation (VOCON
Evaluation)
Inspect internal
and external
microphone
contacts
No
Y
es
Repair
connections or
replace flex
connector
Connect an RLN4460
test box (or equivalent)
to the radio side
connector via a
programming cable
Inject a 225mVrms
1kHz tone into the
test box Audio in
port
Is FM
deviation
approx
3kHz?
No VOCON
problem found
Voltage > 7.0mV?
Replace
L651
and /or L652
Check voltage
on C754 and
C755
Replace
C754 and/or
C755
6 OCO a s ud o oub es oo g C a ( o )