
72A-1898 Rev. A 11/01
B-1
Monday
, November 26, 2001 1:09 pm
Appendix B. Troubleshooting and Parts
Replacement
This appendix covers troubleshooting for the TDR9000 and related parts
replacement procedures.
Troubleshooting
The topics that follow discuss these troubleshooting-related areas:
• Running and interpreting the results of the Self-Diagnostics test
• Analyzing the system for specific problems
• Troubleshooting tools designed to pinpoint problems based on
symptoms, including:
• Troubleshooting flowcharts
• A Problem/Solution table
• A drawing, from the top view, of the circuit boards that
comprise the system
• Interpreting TDR9000 LEDs
Self-Diagnostics Test
The Self-Diagnostics test is comprised of the two different automated test
sequences defined below. For both tests, all external stimuli are
physically disconnected from the inputs using relays that switch
simulated test signals into each of the sensor channels.
Global Self Test
This test always runs and if it detects no failures,
completes the Self-Diagnostics cycle. It sources test
signals to the Physical Front Panel. Isolation of the
Physical Front Panel is achieved by breaking the
input circuit just inside the front panel connector.
Содержание TDR9000
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