Service manual

EPSON ELP-3500 Service Manual
3-24
Optical Head Unit/Light Guide Unit
Screws
Figure 3-30.
1. Remove the mounting screw on the bottom of the optical head unit.
Screw: +M4x8 F/Zn: P/N 1024565
Mounting torque: 6.0 kg cm = 5.2 lb inch
1. Remove 2 mounting screws on the top of the optical head unit before pulling the light
guide unit up straight and separating it from the optical head unit.
Screws: +M4x10 F/Zn: P/N 1022793
Mounting torque: 6.0 kg cm = 5.2 lb inch
Caution:
Do not touch the 3 light valve screens on the light guide unit with your hands, and do not
bend the FPC cable. When installing the light guide unit on the optical head unit, align
the 2 bosses (beside the screws for the light guide unit) to the holes in the optical head
unit before tightening the screws. The optical head mounting screw (M4x8) on the bottom
of the unit is different in length from the mounting screw (M4x10) on the top. Check
screw size before mounting them.