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Table 3-3. Test Set Self-Test Continued
Up
TM-9-4931-363-14-P Fire Control Subsystem Test Set AN/GSM-249 P/N 2201736-05 Manual
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Section IV. TROUBLESHOOTING - TM-9-4931-363-14-P0092
TM 9-4931-363-14&P
M A I N T E N A N C E INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT
4-1. General.
Refer to Appendix B for the list of repair parts. Special
t o o l s for maintenance and repair of the fire control
subsystem test set are listed in table 4-1. Refer to Appendix
C, Section III, for tool and test equipment requirements.
Table 4-1. Special Tools and Test Equipment
Reference
NSN or
Item
Use
reference
Paragraph
Figure
Organizational HSS boresight kit
HSS boresighting and
alignment
7.62-mm boresight kit
LOD alignment
I
Section II. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
4-2. General.
Perform the self-test of the test set as described in
paragraph 3-6. Remove any dirt, dust, or grime with a soft
cloth and cleaning solvent conforming to MIL-A-6091
(diesel fuel, gasoline, and benzine are prohibited).
Section III. INSPECTION AND TEST
4-3. General.
4-5. Helmet Boresight Tool Inspection.
Inspect all mechanical parts to insure they are in good
a. Secure the rail clamp base of the linkage orientation
condition and are not bent, cracked, broken, or
device (LOD) in the O-degree position. Clamp the rail clamp
deteriorated. Inspect electrical parts for obvious damage to
base of the LOD (fig. 3-2) securely to a stable base.
insure they are not cracked, broken, or otherwise damaged.
Check for frayed or broken wires, loose or badly soldered
joints, and shorted terminals or connectors,
b. Attach the boresight tool to the magnet on the LOD.
4-4. Test Set Electrical Test.
c. Slightly loosen the elevation and azimuth locks on
Perform the electrical self-test, paragraph 3-6.
the LOD.

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