TM 1-1520-238-T-5
8–20
8–7.
SYSTEM DESCRIPTION (cont)
8–7
(g) The dim/test panels (fig. 8–12) automatically cause brightness of the indicators to change. A
photocell varies the brightness in accordance with the variance of ambient light in the pilot and CPG
compartments. The pilot dim/test panel routes signals to the indicators. The CPG dim/test panel routes signals
through the CPG dimmer power supply to the indicators. The SDC outputs a failure voltage upon SDC power
supply failure or lamp supply fails. The failure signal lights the AUX PWR indicator.
PILOT DIM / TEST
PANEL
M68-120
PILOT
STATION
SDC
PILOT EXT LT /
INTR LT PANEL
PANEL EDGE - LIGHTING
AUX PWR LAMP VOLTAGE
AMBIENT LIGHT CHANGES
CPG ENGINE
INSTRUMENT DIMMER
POWER SUPPLY
CPG INTR LT
PANEL
CPG DIM / TEST
PANEL
CPG
STATION
AMBIENT LIGHT CHANGES
TO INSTRUMENTS
TO INSTRUMENTS
PANEL EDGE - LIGHTING
Figure 8–12.
Dim/Test Panel Functional Block Diagram
