Locking the SUPER-40
Shutter in the
3-Blade Position
Stop the projector;
loosen the
SCREW
on the
LAMPHOUSE
COVER
(Figure 9);
remove the cover. Turn the thread knob
until the
SHUTTER
LOCK
(Figure 10) is
visible. Hold the thread knob to prevent
rotation of the shutter and, using a
screwdriver
or similar object, push the
shutter lock
down
as far as it will go.
Replace the lamphouse cover and
tighten the screw. To unlock the shutter,
proceed as above, except that the
shutter lock must be moved
up
as far
as it will go.
NOTE: If a small image is projected-
especially in a darkened room-
the 2-blade shutter operation may
cause noticeable flicker, even at
SOUND speed. Locking the shutter
in the 3-blade position will usually
eliminate the flicker by reducing
the illumination
somewhat and
increasing the light interruptions
to seventy-two per second.
LAMPHOUSE
COVER
FIGURE 9
FIGURE 10
SHUTTER
LOCK
11
