TM 1-1520-238-T-6
9–94
9–7.
SYSTEM DESCRIPTION (cont)
9–7
PILOT CENTER
CIRCUIT BREAKER PANEL
28 VDC
LT UTIL SEC
CB23
M69-365
PILOT
UTILITY LIGHT
PILOT EXT
LT / INTR
LT
PANEL
28 VDC
PILOT
GLARESHIELD
CPG
CIRCUIT BREAKER PANEL 1
28 VDC
EMERG BATT
UTIL SEC LT
CB30
CPG
UTILITY LIGHT
CPG
INTR LT PANEL
28 VDC
28 VDC
CPG
LEFT GLARESHIELD
CPG
RIGHT GLARESHIELD
Figure 9–87.
Pilot and CPG Utility and Secondary Lights Functional Block Diagram
(11) Pilot and CPG Edge-Lighting.
Edge-lighting illuminates panel markings and the clear edging around
each switch, indicator and circuit breaker.
(a) Pilot edge-lighting (fig. 9–88) is controlled by three INTR LT rheostat switches located on the pilot
EXT LT/INTR LT panel. The INST rheostat switch controls channels 1 and 2, the R/CTR CSL rheostat switch
controls channel 3, and the L CSL rheostat switch controls channel 4 of the multi-channel dimming controller.
Each channel varies from 0 to 5 VDC. The pilot also has an EDGE LT PNL ON/OFF switch, located on the
overhead circuit breaker panel, to independently turn off circuit breaker edge-lighting. The pilot utility and
secondary lights supply 28 VDC through the pilot EXT LT/INTR LT panel to the multi-channel dimming controller
for DIM in voltage.
(b) CPG edge-lighting (fig. 9–89) is controlled by three INTR LT rheostat switches located on the CPG
INTR LT panel. The INST rheostat switch controls channels 1 and 2, the R CSL rheostat switch controls channel
3, and the L CSL rheostat switch controls channel 4 of the multi-channel dimming controller. Each channel varies
from 0 to 5 VDC.
(c) Edge-lighting circuit breakers (fig. 9–90) consist of the LT PRI circuit breaker (CB39), on the pilot’s
center circuit breaker panel, and the PRI LT circuit breaker (CB14), on the CPG’s circuit breaker panel 1. The
edge-lighting circuit breakers supply 115 VAC to the multi-channel dimming controller which converts 115 VAC into
the proper dc levels for four channels. EMERG BATT UTIL SEC LT circuit breaker (CB30), on the CPG’s circuit
breaker panel 1, supplies 28 VDC through the CPG INTR LT panel to the multi-channel dimming controller.
