Projection Lens - Hughes JVC 220 Service Manual

Chapter 4---Maintenance (Removal/Replacement)

4.18 Projection Lens

Figure 4-13. Projection Lens holding screw and removal notch.
4-22
4. Loosen the CRT Lens Stopper Ring (the thin collar just
in front of the CRT Holder knurled ring-Figure 4-11)
and slide it off the back of the Relay Lens.
5. Loosen the wing nut on top of the Relay Lens mount
(the bracket at the rear of the Relay Lens).
6. Remove the 2 long hex bolts at the front of the Relay
Lens (shown in Figure 4-12).
7. Remove the 2 hex bolts at the rear of the Relay Lens
(these bolts are level with the bottom of the Relay Lens
and hold the bracket in place).
8. Remove the Relay Lens. Leave the Relay Lens
Bracket and the CRT Lens Stopper Ring in the
projector-do not send them back with the Relay Lens.
9. Replace the Relay Lens in reverse order from above.
To remove the Projection Lens:
1. Remove the sponge cover from around the front of the

Projection Lens.

2. Disconnect and label the Projection Lens Focus and
Zoom motor cables (The Focus motor is at the top of
the Projection Lens. The Zoom motor is at the bottom.)
3. Loosen (do not remove) the Lens holding screw at the
right side (Figure 4-13) of the Projection Lens.
4. Rotate the Projection Lens left or right so that the notch
on the lens clears the holding screw on the lens holder
(Figure 4-12). CAUTION! The lens can fall out now!
Carefully slide the lens out.
5. Replace the Projection Lens in reverse order. NOTE:
The same basic procedure above is used to install or
remove optional fixed lenses.
Model 220 Service Manual