8 Source Four Zoom User Manual
Adjusting the yoke position — 25°-50° Zoom
The Source Four 25°-50° Zoom provides multi-positioning capabilities within its yoke for overall
fixture height and angle.
Setting the fixture height within the yoke
The Source Four 25°-50° Zoom has a two-position yoke for modifying the overall height in which
the fixture is mounted (see Figure 11). To change the height position, perform the following steps.
Step 1: Remove the yoke locking knobs, washers, and hex bolts from either side of the fixture.
Step 2: Raise or lower the fixture to the desired position within the yoke.
Step 3: Reinstall the yoke’s hex bolts, washers, and locking knobs.
Step 4: Tighten the yoke knobs to secure in position.
Setting the angle within the yoke
Step 1: Loosen the yoke locking knobs (see Figure 12). Do not remove them.
Step 2: Tilt the fixture to the desired position.
Step 3: Tighten the yoke locking knobs to secure in position.
Figure 11
Low clearance position
General use position
Yoke locking knob
Yoke locking knob
Figure 12
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