Christie HAL Series User Manual page 69

MAINTENANCE
Figure 4-7. Replacing the Top Filter
Insert the new top filter into the recessed area, making sure that the tabbed edge
side is up and towards the rear of the projector. Slide all the way under the
funnel-like duct—when properly installed, about an eighth-inch of the filter tab
edge will be visible along the small end of the duct.

Replace the projector lid and power the projector back up (see Steps 6-7 in 4.4,
Replacing the Lamp).
4-9
DLV 1280 User's Manual