JVC 250 Service Manual page 54

Loosen (do not remove) the Lens holding screw at the right side (see
3.
Figure 4-11) of the Projection Lens.
Figure 4-11 Projection Lens holding screw and removal notch.
NOTE: The 0.96:1 Projection Lens has an adapter sleeve installed on
it. The Projection Lens is installed the same as other Projection Lenses
except the Holding Bolt needs to be loosened more to allow the
Projection Sleeve to clear it.
4. Rotate the Projection Lens left or right as needed so that the notch on the
lens clears the holding screw on the lens holder (see Figure 4-11).
5. Carefully pull the Projection Lens out of the projector.
6. Replace the Projection Lens in reverse order. Be sure to reconnect the
Zoom and Focus motor cables.
NOTE: Use the same procedure to install or remove fixed lenses. Also,
when changing from a zoom to a fixed lens, or vice versa, check the ILA
Back Focus adjustment (see section 4.3 ILA
Model 250 Service Manual
Chapter 4---Optical
®
).
®
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