Strong TROUPERETTE IV Instruction Manual page 5

ANGULAR ADJUSTMENT OF MASKING SHUTTER BLADES
THE ANGULARITY of the masking shutter (chopper) blades can be adjusted to com-
pensate for the horizontal projection angle, for example, if the spotlight is positioned to the left or right
of center stage. Remove the spotlight housing to expose the optical system.
AN UNBALANCED CONDITION will occur when the housing is removed, so the
vertical tilt locking knob should be tightened. Slide the large lens forward by moving the trombone
handle to the extreme forward position; remove the spot size control handle. Unscrew the knobs from
the iris and chopper levers. Remove all screws securing the housing to the base pan, and lift the
housing from the base pan.
SEE THE DETAIL DRAWING on Figure 5. Loosen, but do nor remove, the screws
(Item 16) securing each of the chopper blades (Items 14 & 18). Angle the lower blade so that it lies
parallel with the footlights, and tighten the lower screw. Operate the masking shutter lever to close the
chopper blades, and cause the upper blade to align to the lower blade. Secure the upper blade by
tightening its mounting screw. Check the setting by lighting the bulb and projecting a narrow strip spot
to the stage. Replace the housing and controls.
THE COLOR BOOMERANG (Figure 6) is equipped with six 3-1/2" color filter discs
containing the following colors, in sequence, from rear to front: (1) Amber, (2) Flesh Pink, (3) Medium
Pink, (4) Light Magenta, (5) Special Lavender, and (6) Special Steel Blue. Additional colors are avail-
able from theatrical supply dealers; specify ROSCOLUX
THE SIX COLOR DISC CONTROL LEVERS are mounted in the cover plate directly
in front of the aperture selector (iris) lever. To insert a color disc into the light beam, move the desired
disc lever to its extreme left position. To release a color, return the lever to the extreme right. Always
operate the color levers to the limits of their travel.
TO DISMOUNT A COLOR DISC, unscrew the knobs on the iris and chopper levers
and remove the two screws securing the top cover casting to the housing. Lifting the top cover plate
from the spotlight will remove the boomerang assembly. Each color disc is mounted to its control arm
by two screws. See Figure 6 Parts List for replacement discs.
OPERATION OF THE COLOR BOOMERANG
®
(or equivalent) high temperature gels.
TR4/003