May 28, 2008
6871620L01-C
5-4
Troubleshooting Charts:
Power-Up Failure
Power-Up Failure–Page 2
Signal may
appear for a very
short period of
time (50ms). Use
an oscilloscope
with trigger to
capture signal
Probe
16.8 MHz
Signal at R1416
Investigate
16.8 MHz
Reference
Oscillator
Signal
greater than
1 Vp-p
Check
16.8 MHz
Signal at
C1402
This signal may
contain harmonics
and, therefore, may
not appear as a
perfect sinewave
Signal
greater than
1 Vp-p
Investigate
Clock Buffer
Components and
Isolate Problem
Refer Board to
Service Depot for
Reflash, Patriot,
SRAM, and
FLASH Analysis
No
No
Yes
Yes
1
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: ......