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TO EXTINGUISH the arc, place the LAMP switch on the instrument panel to "OFF." The
lamphouse blowers will continue to operate until the xenon power supply is de-energized. Allow the blowers
to operate for ten minutes before turning off the power supply; a forced-air bulb cooling cycle at shutdown is
required by all bulb manufacturers to comply with their warranty terms.
BEFORE OPENING the lamphouse enclosure for servicing, allow the blowers to operate for
twenty minutes, or until the bulb has cooled to room temperature.
GENERALLY THE BEST POSITION for the operator to stand is near the center of the spot-
light on the right side. The angle of tilt, the size of the porthole, and the layout of the spotlight position may
dictate another location.
EACH OPERATOR will, after a few minutes of operation, generally develop his own system
and position for most convenient operation.
THE HORIZONTAL SWING and vertical tilt are individually adjustable to give the desired
degree of friction to suit the operator. The locking clamps are located on the right side of the yoke assembly.
AN EXPERIENCED OPERATOR will usually keep one hand on the spot size control handle.
This allows both directing the spot and changing spot sizes immediately upon cue. Compressing the brake
lever permits free movement of the large lens forward and back, and releasing the lever locks the spot size at
the desired point of travel.
Spot Size Control Handle
HANDLING THE SPOTLIGHT
Large Lens
Brake Lever
XG4/011
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