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TM 55-1905-219-14-8
4-5. GENERAL (Continued).
Table 4-22. Twelve Inch Signalling Searchlight Troubleshooting.
NOTE
Refer to paragraph 4-77 for maintenance instructions.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
No light.
Step 1. Loss of power.
Check fuses.
Check circuit continuity.
Step 2. Burned out lamp.
Replace lamp.
2.
Weak beam.
Step 1. Improper lamp.
Install lamp rated for supply voltage.
Step 2. Lamp blackened with age.
Replace.
Step 3. Dirty optical system.
Clean coverglass and reflector.
Step 4. Shutter blades not properly opened.
Adjust shutter stops.
Replace worn stop screw.
Step 5. Low voltage.
Check control panel.
4-82


 


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