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Step 3: Insert the iris or motorized gobo device. For an iris, install the flat side toward the shutters
and make sure the iris handle extends from the slot.
Step 4: Slide the slot cover back toward the shutters until it meets the iris handle. Leave enough
space to move the iris handle.
Step 5: Secure the drop-in iris slot cover by tightening the screws.
Rotating the barrel assembly
Step 1: Loosen the barrel rotation knob directly behind the shutters on the underside of the
reflector housing (see Figure 9). Do not remove the barrel rotation knob.
Step 2: Rotate the barrel to the desired position (up to 25° in either direction from the centered
position).
Step 3: Once the barrel is positioned, tighten the barrel’s rotation knob to lock it in place.
Adjusting the yoke position
The Source Four CE provides multi-positioning capabilities within its yoke for overall luminaire
height and angle.

Setting the luminaire height within the yoke

The Source Four CE has a two-position yoke for modifying the overall height in which the luminaire
is mounted (see Figure 10). 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 luminaire.
Step 2: Raise or lower the luminaire 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.
Figure 9
Barrel rotation knob
Figure 10
Low clearance position
General use position