TM 5-6675-323-14
4-3.2 Electrical
Schematic.
a. Unfused 120 V, 60 Hz power is provided to duplex sockets on each end of
R e m a i n i n g circuits are protected by 5 amp
desk and socket on microscan platform.
fuse.
b. Switch S1 is coupled to variable resistor R2 to provide power to leaf
light.
c. Switch S2, interlock on leaf light, interrupts power when leaf light is
pushed into desk.
d. Dimmer assembly modifies ac at transformer to regulate intensity of light.
4-3.3 D i m m e r
Card.
a . When operated to ON, the ON/OFF/INCREASE control applies voltage from the
p o w e r source through plug P1 and cable W1 to the dimmer circuit board to operate the
s y s t e m w h e n e v e r t h e l e a f i s p u l l e d o u t f r o m t h e s t o w e d p o s i t i o n . W h e n the leaf is
in the stowed position, switch S2 opens, breaking the circuit. The INCREASE control
i s a p o t e n t i o m e t e r t h a t a d j u s t s h e light level of the grid lamp from a maximum of
2 0 0 0 ft lamberts (6852 candela/m) to a minimum of approximately 5% of maximum.
T h e INCREASE potentiometer is an integral part of switch S1, and is connected across
two of the terminals of the dimmer circuit board.
4-3
