TM 11-6730-235-12
WARNING
4-13.
Fresnel Lens Replacement
Be careful when handling the projection
a. Raise the focusing arm holster to its top limit with
lamp. If a lamp is still hot from operation,
touching the glass envelope can cause
the focus knobs.
painful burns.
b. Press the spring lock button on the case as-
sembly inward to release the top ate assembly.
d. Operate the lamp eject lever on the projection
lampholder (fig. 1-2) to eject the projection lamp.
c. Swing the top plate assembly upward until it is
locked in place by the interlock arm of the case assembly
e. When the projection lamp has cooled, remove it
as shown in figure 2-2.
from the case assembly, o use gloves to handle it
d. Press the fresnel lens latch to the side and swing
immediately if it is still hot.
the fresnel lens open
Locate the THIS SIDE UP marking on the
f.
replacement lamp.
e. Remove the screw and nut that secure the side
g. With the THIS SIDE UP marking facing upward,
and front sections of the holder for the fresnel lens.
insert the replacement lamp in the lamp
f.
While supporting the fresnel lens with one hand,
swing the sections of the fresnel lens holder open.
h. Move the lamp gently from side to side if
necessary to insure a firm seating for the lamp.
g.
Lift the fresnel lens out of the fresnel lens holder.
i.
Lower the top plate assembly onto the case
h. Insert the replacement fresnel lens on the rear
assembly lid.
section of the fresnel lens holder flush against the fixed
section of the fresnel lens holder.
CAUTION
i.
Swing the fresnel lens holder front and open side
If the spring lock button is not engaged,
sections so that they dose over the fresnel lens.
the top plate assembly can swing open
j.
Secure the sections of the fresnel lens holder
during movement of the projector,
with the nut and screw removed in e above.
breaking the stage glass.
k. Press the fresnel lens lath to the side and push
j.
Press the to plate assembly downward until the
the fresnel lens and holder into place.
spring lock button is engaged.
l.
Press the bottom of the interlock arm towards
k. To make sure that the spring lock button is
the front of the projector to release the top pate
engaged, try to lift the id of the top plate assembly.
assembly.
4-12.
Stage Glass Replacement
m. Lower the top plate assembly on the lid of the
(fig. 1-1)
case assembly.
CAUTION
a. Raise the focusing arm holster to it top limit with
the focus knobs.
If the spring lock button is not engaged,
b. Loosen the screws that secure each of the two
the top plate assembly can swing open
stage glass dips to the top plate assembly.
during the movement of the projector,
c. Slip the sage glass s out from under the stage
breaking the stage glass.
glass clips.
n. Press the top plate assembly downward until the
d. Slide the replacement stage glass under the
spring lock button is engaged.
stage glass clips.
o. Check to see that the top plate assembly Is
e. Tighten the screws that secure the stage glass
secured in the closed position by the spring lock button.
clips.
4-3
