Figure 2. Projector PH-637A/PFP on projector stand.
a rear surface mirror, and the bottom of a Frenel condenser lens. A
blower, which cools the lamp when it is turned on, is located in the
lower front part of the housing. An ON-OFF switch and a recep-
tackle connector for the power cord are on the front of the housing.
On top of the housing are a 1-inch hole, through
which the head
support post is inserted, and the projection stage. The projection
stage is s plate-glass cover, held in place over a 10-by 10-inch opening
by retaining strips. The Fresnal condenser lens rests in grooves
under the plate-glass over. In front projection stage on top