TM 5-3610-220-14
Figure 4-5. Copyboard vacuum control switch and transparency holder light switch, installed.
Section VII. MAINTENANCE OF ARC LAMP ASSEMBLY
the assembly, having high reflecting surfaces. Housed within
4-26. Description
the reflectors are two carbon electrodes (20) which are
The copyboard is illuminated by two constant intensity carbon
mounted on adjustable arms and are electronically controlled
arc lamps which provide a uniform intensity of light over the
by electronic sensing devices. The arc lamps operate from a
entire area of the image. The arc lamps are mounted on arm
110-volt AC source in conjunction with a single-phase
brackets (11 and 14, fig. 4-6) which are coupled to the
transformer switched by a magnetic contactor. The arc lamp
copyboard to maintain a uniform intensity of illumination
wiring diagram and exploded view are shown in figures 4-10
regardless of their position along the camera ways. The arc
and 4-11 respectively.
lamps are equipped with reflectors (3) which are integral with
4-9
