Epson PowerLite 5000 Service Manual page 35

Inside View of the Light Guide Unit
Caution:
Do not cause any shock or mechanical stress to the optical engine or disassemble it.
Otherwise, pixel divergence may occur. The alignment is adjusted in the factory, and
specific electrical correction is made on the driver board for each optical engine.
Table 2-1
UNIT NAME
Lamp Inner Housing
Light Guide Unit
Projector Lens
Optical Head/Prism
Unit
Note:
The light guide unit, optical head/ prism unit, projector lens unit, and driver board are
treated as one part named the optical engine.
FUNCTION AND REMARKS
Includes one metal halide lamp as a light source. The FU board is
mounted for lamp inner housing detection.
Disperses the light from the light source uniformly using an A/B lens
array. (Ultraviolet rays are also eliminated.) Disperses the light in three
parts(R/G/B), for the condenser lens and mirror.
Zoom (*1.3) and focus adjustments
Consists of three light valves, a polarization plate, and a prism unit.
Each light valve controls the shutter of pixels with six levels.
The prism unit creates R/G/B optical signals and transfers them to the
projector lens unit.
EPSON PowerLite 5000 Service Manual
Figure 2-4
2-5