Motorola ASTRO XTS 5000 - Page 115

November 16, 2006 6881094C31-E
5-24 Troubleshooting Charts: VCO TX/RX Unlock
VOCON TX Audio—Page 1
MAEPF-27396-O
Inject a 200 mV
rms 1.0 kHz tone
to the test box
Audio In port
Repair connections
and/or replace flex
and microphone
Connections
OK?
Problem
with Mic path
components?
No Problem
found.
End
Replace
appropriate
component
Is FM
deviation approx.
3.0 kHz?
Connect an
RLN4460A audio
test box (or equivalent)
to the radio side
connector
Radio has no
Transmitter Deviation
(VOCON Evaluation)
Inspect
Microphone and
Flex Connector
Ye s
No
Ye s
Ye s
No
1
2
No
Probe Voltage
at U509, pin 5
Verify Integrity
of Mic path up
to U509
Is
1 kHz Signal
present at approx.
14 mV rms?
No
Ye s