6871620L01-C
May 28, 2008
Troubleshooting Charts:
Display Failure
5-11
Display Failure–Page 2
J1-25 = 0V?
J1-37 = 1.875V?
J1-42 = 1.875V?
J1-44 = 0C?
Check DC at
J1-25, J1-37,
J1-42 & J1-44
No
Yes
Yes
No
No
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
1
Problem
Resolved?
Problem
Resolved?
Problem
Resolved?
Problem
Resolved?
Probe signals at
J1-19, J1-23,
J1-39, J1-58
& J1-60
Check RESET
at J1, pin 33
Verify Signal
Path Integrity
and correct
Verify Signal
Path Integrity
and correct
Verify Signal
Path Integrity
and correct
Verify Signal
Path Integrity
and correct
Probe Display Date Lines
(J1-13, J1-15, J1-27, J1-29,
J1-35, J1-36, J1-38, J1-40,
J1-45, J1-47, J1-49, J1-51,
J1-53, J1-55, J1-57 & J1-59)
3
Any Digital data
or activity?
End
End
End
End
V = 2.9V
+/- 20%?*
* per Standard Bias Table
Any Digital data
or activity?
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: ......