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OPERATION OF OPTICAL SYSTEM (continued)
THE ANGLE OF THE MASKING SHUTTER BLADES can be adjusted to compensate
for the horizontal projection angle. Remove large lens shaft handle and knobs. Remove the optical
system housing, and loosen (with an angle screwdriver) the screws holding each of the masking shutter
blades just enough to allow adjustment. Ignite the bulb and adjust the angle of the bottom blade by
tapping with a screwdriver so its projected edge lies parallel to the footlights; tighten the mounting
screw in the bottom blade.
OPERATE THE MASKING SHUTTER LEVER to close the blades. Adjust the upper
blade to close in line with the bottom blade. Tighten the screw to secure the upper blade.
THE FADEOUT MECHANISM AND DOUSER CONTROL is the rear lever projecting
through the top of the optical system housing. This lever controls the intensity of light from complete
fadeout when the lever is to the left, to full intensity when the lever is to the right.
THE LENS FOCUSING KNOB is located on the operating side of the optical system
base pan (forward end) and is used to adjust the optical system for the length of throw. When making an
adjustment rotate the spot focusing knob until the sharpest edge is obtained on the projected spot.
Moving the large lens to its center of travel and then adjusting for a sharp edge should give satisfactory
results for the full movement of the lens system.
575/009
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