TM 55-1520-240-23-7
9-60
LIGHTING SYSTEMS
(Continued)
9-60
CENTER FLIGHT INSTRUMENT PANEL LIGHTS
SYSTEM WITH 17 AND WITHOUT 74
Description
The center panel lighting system includes CTR INST LTG
control 0-115 variable transformer, 0-115 volt variable
transformer, 0-115 volt variable autotransformer,
lamps to light 17 instruments, standby compass, and
lightplates for FIRE DETECTOR panel, and CAUTION
LIGHTS/VHF ANT SEL panel.
Operation
Power for the system comes from the 115 volt No. 2
ac bus. When CTR INSTR LIGHTING circuit breaker
is closed, 115 vac is applied to CTR INST LTG control
which varies the 5 volt output to vary the brightness of
the lamps and lightplates.
9-189
