X1 Service Guide 24
Remove and Replace the Optical Engine
The optical engine (505-1506-xx) fastens to the bottom case. It produces the projected image by
directing focused light from the lamp module through the color wheel and onto the Digital Micromirror
Device (DMD). The optical engine contains a formatter ECA that processes the image signal from the
controller ECA before the the signal is delivered to the DMD.
It also comprises other elements in the light path, including the:
♦ Light tunnel
♦ Photodiode
♦ Projection lens
CAUTION The color wheel is unprotected on the side of the optical engine. Avoid touching the color
wheel. The edge of the glass wheel is sharp and can cause personal injury. Touching the color
wheel can break it or leave smudges that degrade the image.
1. Remove the following items:
Lamp module (page 42)
Focus ring (page 6)
Zoom ring (page 30)
Front bezel (page 32)
Rear bezel (page 49)
Top case (page 52)
Ballast/power supply ECA (page 6)
Chassis (page 12)
Controller ECA (page 19)
Color wheel shield (page 17)
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