May 28, 2008
6871620L01-C
5-18
Troubleshooting Charts:
VOCON TX Audio
VOCON TX Audio–Page 2
Replace
Mainboard
Check
UCM-CE-Audiojack
Flex and Flex
Connectors
Go to
TX RF
flowchart
Clock
and Frame Sync
present?
Data
present at
CODEC_TX?
Use an oscilloscope to check the
SSI audio signals from the MAKO
(U1304). The following test points
are used for data collection:
CODEC_DCLK (R1335): 512 kHz Square Wave Clock
CODEC_TX (R1337): Audio Data Words
CODEC_FSYNC (R1336): 8 kHz Frame Sync Pulse
No
Yes
Yes
End
Problem
Resolved?
Yes
1
2
1
No
No
End
Repair connections
and/or
replace flex
Connections
OK?
Problem
Solved?
No
Yes
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: ......