radiance 7201111, Instruction Manual

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RAD/07
OPERATION OF OPTICAL SYSTEM
(continued)
THE DISENGAGED, or fully
open
position of both masking shutter levers is to the
extreme left (away from operating side). Varying degrees of masking, from fully open to complete
cutoff, are obtained by moving the levers to the right (toward operating side)
THE ANGLE OF THE MASKING SHUTTER BLADES can be adjusted to compensate
for the horizontal and vertical projection angle. If the spotlight is installed at an extreme house-right
or house-left position, the projected edges of the masking blades may not align horizontally with the
apron, or vertically with the proscenium. Remove the top access covers to expose the horizontal (rear)
and vertical (front) masking blade assemblies. When the blades are in their full “open” positions,
adjusting tabs are accessible above and below the horizontal blades, and to the left and right of the
vertical blades. Move these tabs to position the masking blades at the desired angle.
THE FADE-OUT MECHANISM AND DOUSER CONTROL is the single lever
projecting through the top of the optical system housing near the back of the unit. This lever controls
the amount of light from full intensity when the lever is to the left, to complete fadeout and douse when
the lever is to the extreme right.
CAUTION
ULTRAVIOLET RADIATION is emitted when the metal halide lamp is
operating. Wear protective clothing and goggles or glasses when adjusting
the shutter blades or performing any service with the lamphouse or optical
system covers removed.