TM 55-1520-240-23-7
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LIGHTING SYSTEMS
(Continued)
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OVERHEAD PANEL LIGHTS SYSTEM WITH 17 AND
74
Description
The overhead panel lighting system includes lightplates
for 12 individual panels, an OVHD CSL DIM/BRT control
(0-115 volt variable transformer), and a 115 to 5 volt
autotransformer. The system also provides controlled
ac from the DIM/BRT control to the lightplate for the
hoist/cargo hook control panel. Controlled 5 vac is
provided to the compass controller.
Operation
Power for the overhead panel lighting system comes
from the 115 volt No. 1 ac bus. When OVHD PNL
LIGHTING circuit breaker is closed, 115 vac is applied
to OVHD CSL control which controls the brightness of
the lamps. It also controls the level of the voltage fed to
the compass controller from the 5 volt autotransformer.
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