Epson EMP-7300, Руководство по обслуживанию

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3-2
REV.A
Table3- 2
1 Optical head unit
2 Prism unit
3 Light guide unit
4 Projection lens unit
5 CD10DR board
These units are specified as “Optical
engine”.
(Treat as one replaceable part in the
field maintenance.)
* Do not disassemble the Optical engine.
* Do not exchange any unit on the optical engine to the others.
Mechanical adjustments for optical engine.
1. Optical Head Unit
The alignment (height/left and right/concurrent) of the polarization plates (include
R/G/B light valves) is applied in the factory. If the alignment is modified, clear color
image will not be made, because of the color divergence.
Caution: Do not apply any mechanical stress to the polarization plate, and also
not loosen the screws.
2. Prism Unit
To synthesize the light output from each polarization plate (include R/G/B light
valves), the alignment (concurrent to the polarization plate) of the prism unit is
applied in our factory. If the alignment is modified, clear image will not be made,
because of the pixel divergence to R/G/B synthesizing and projection lens unit,
being out of focus and color uniformity.
Caution: Do not loosen the prism unit fixing screws.
3. Light guide unit
The alignment of the light guide unit on the optical head unit is applied (gap and
concurrent to the polarization plate) in our factory. If the alignment is modified,
clear image will not be made, because of being out of the brightness uniformity on
the display screen (brightness or chroma is not uniform on the screen.)
In consideration of the alignment of the lens array and the mirrors, and also their
combinations, the factory setting is applied to the light guide unit to support the
best display performance. (If the alignment is modified or the location is changed,
there comes distortion on the display screen, therefore clear image will nit be
made.)
Caution: Do not disassemble the light guide unit. If you remove the upper guide
cover from the unit, the alignment of lenses or mirrors may be
unintentionally changed and also dust may stick to the unit.
Since EMP-7300 requires very precise adjustment, it can not be adjusted
in the field.