6871620L01-C
May 28, 2008
Troubleshooting Charts:
VOCON TX Audio
5-17
5.10 VOCON TX Audio–Page 1
Inject a 200 mV
rms 1.0 kHz tone
to the test box
Audio In port
Repair connections
and/or replace flex
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 CE
Connector
Radio has no
Transmitter Deviation
(VOCON Evaluation)
Inspect UCM-CE-Audiojack
Flex and Flex Connectors
(from Front Flip Assembly
to Mainboard)
Yes
No
Yes
Yes
No
1
2
No
Probe at
C1347
Verify Integrity
of Mic path up
to C1347
Is
1 kHz Signal
present?
No
Yes
Summary of Contents for ASTRO XTSTM 4000
Page 1: ...COLOR CHORDS 7 ASTRO XTSTM 4000 Portable Radio Detailed Service Manual ...
Page 2: ......
Page 16: ...May 28 2008 6871620L01 C xiv Commercial Warranty Notes ...
Page 22: ...May 28 2008 6871620L01 C 1 6 Introduction Notes ...
Page 26: ...May 28 2008 6871620L01 C 2 4 Radio Power Notes ...
Page 56: ...May 28 2008 6871620L01 C 3 30 Theory of Operation Notes ...
Page 100: ...May 28 2008 6871620L01 C 6 8 Troubleshooting Waveforms Notes ...
Page 194: ...May 28 2008 6871620L01 C B 2 Motorola Service Centers Notes ...
Page 204: ...May 28 2008 6871620L01 C Glossary 10 Glossary Notes ...
Page 209: ......