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TM 11-5820-890-30-5
Section Ill. TROUBLESHOOTING PROCEDURES
Subject
Para
Page
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
2-27
Troubleshooting, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
2-27
Test Precautions and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
2-29
Explanation of Symbols and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
2-29
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
2-30
Maintenance Action Precise Symptom (MAPS) Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
2-45
Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
2-51
2-25. GENERAL.
This section provides the troubleshooting procedures used to fault isolate a defective RT. The troubleshooting
information is presented in the form of flowcharts. They systematically get from a symptom to the bad module.
2-26. TROUBLESHOOTING.
Troubleshooting is done on a faulty RT. The steps to determine if an RT is faulty and how to troubleshoot it are
illustrated in the flowchart in figure 2-12. The following is a description of the flowchart. (See paragraph 2-28 for a
description of the symbols.)
a.
When an RT is received from unit maintenance, inspect it for damage. Repair any damage before
proceeding with testing. See section IV if repairs are necessary.
b.
Perform the operational check (paragraph 2-29). In many cases, it will identify the defective module
or the troubleshooting flowchart to use. If the operational check is passed, use the symptom and the
MAPS chart to locate the troubleshooting flowchart to use. See paragraph 2-30 for the MAPS chart.
NOTE:
When either the top or bottom cover is removed from the RT, the interlock
switch (es) must be bypassed (switch lever pulled out) and the fill data must be
reloaded.
c.
Using the troubleshooting flowchart identified, troubleshoot to the defective module.
d.
Replace the defective module.
Follow the procedures in section IV.
e.
Verify the repair. Perform the operational check in paragraph 2-29. When the operational check (OP
CHECK) is passed, the RT can be returned for use.
2-27
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