Adjusting The Fold Mirror; Aligning The Integrator Module - Christie CP2420-Xe Service Manual

6. When both sides appear equally blurry, adjust the horizontal and/or vertical offset to re-center
the image on the screen.
7. Repeat Steps 2 to 5 until the top and bottom of the screen are both focused.
8. Re-focus the center of the image.
The image should be focused at the center and on all sides.
9. Tighten the vertical hold screw to maintain the adjustments.
10. Check the boresight again.

Adjusting the fold mirror

When properly aligned, the fold mirror directs light from the integrator fully and precisely onto the
DMD pixels. If a corner or edge of an image is missing, the fold mirror might be misaligned with the
optical system.
After moving or replacing the fold mirror, check for consistent light over-spill around the perimeter of a
full white or black field—if the shadows vary or disappear completely along any edge or corner, the
fold mirror is cropping light from the DMDs and must be realigned. When corrected, the shadows cast
by the integrator edges form an even perimeter around the full active display area without interfering
with the image and all of the image is displayed.
1. To raise or lower the image, adjust the screw closest to the right side on the base of the
projector.
2. To move the image left or right, adjust the screw farthest from the right side.

Aligning the integrator module

The integrator module is located early in the light path, between the UV filter and cold mirror.
The main component of the integrator module, the internal solid silica pipe, efficiently converts the
initial round light beam supplied from the lamp into a uniform rectangle that passes through the
remainder of the optical system and eventually illuminates the three DMDs at the opposite end of the
light path. Therefore, when the integrator module is moved or replaced, its end-to-end position and its
rotation must be correct for proper focus and full illumination of the three DMDs.
CP2420-Xe and CP4420-Xe Service Guide
020-103566-02 Rev. 1 (07-2022)
Copyright © 2022 Christie Digital Systems USA, Inc. All rights reserved.
If printed, please recycle this document after use.
Service setups
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