Correcting Vignetting; Adjusting Vertical Boresight - Christie CP2308-G User Manual

6. On the top projector, remove the locking brackets from the projector feet.
7. Raise or lower the rear feet of the top projector until the projected images of both projectors
are vertically aligned. The feet should be raised or lowered an equal amount.
8. Reinstall the locking brackets removed in step 6.
9. On the touch panel, tap the Lens Adjust icon on the main screen and then tap the forward
or backward arrows in the Offset area to bring the horizontal lines closer together.
10. If required, on each projector, tap the Lens Adjust icon and then tap the left focus and right
focus icons in the Focus area until both images are the same size and focused.

Correcting vignetting

An image that is brighter at the center than it is at the sides needs vignetting correction.
If your image suffers from vignetting, the lens has reached the end of its offset travel range. If your
installation does not allow the image to be centered with the center of the screen, move the entire
projector in the direction of lens travel.

Adjusting vertical boresight

Perform a top and bottom boresight adjustment to fix image focus issues that cannot be corrected by
aligning the projector to the screen and focusing the lens.
Caution! If not avoided, the following could result in minor or moderate injury.
• This procedure must be performed by Christie qualified technicians.
Ensure that the projector is perpendicular to the screen before adjusting boresight.
We recommend that you complete a top and bottom boresight adjustment before adjusting the
horizontal boresight.
A boresight adjustment should only be made when the image cannot be focused uniformly on the
screen by aligning the projector to the screen and focusing the lens. When adjusting boresight, you
must maintain the boresight distance from the lens to the prism plane set by Christie. For example,
when you move the top screw outward, turn the bottom two boresight screws to maintain the overall
distance.
Ensure that the boresight lockdown screws are adequately tightened. Not adequately tightening the
boresight screws can result in excessive onscreen image vibration. After adjusting boresight, evaluate
the onscreen image vibration and re-adjust if needed.
1. Remove the lens surround.
2. Display the DC2K Boresight test pattern.
3. Loosen the set screw (B).
CP2308-G User Guide
020-102863-01 Rev. 1 (05-2018)
Copyright 2018 Christie Digital Systems USA, Inc. All rights reserved.
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Adjusting the image
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