Correcting Vignetting; Adjusting Vertical Boresight - Christie CP2208 User Manual

If both projectors have the horizontal keystone issue, correcting the image on the bottom
projector should resolve the issue on both projectors.
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, select the Lens Adjust icon on the main screen and then select the
forward or backward arrows in the Offset area to bring the horizontal lines closer together.
10. If required, on each projector, select the Lens Adjust icon and then select 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.
Christie recommends 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. Inadequately 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 .
4. Turn the vertical cap screw 1/8 of a turn counter-clockwise.
Only adjust vertical boresight 1/8 of a turn or less at one time to maintain optimal lens
performance (factory setup of absolute lens distance to the prism). It is critical that you count
each turn of the cap screws to ensure accurate adjustment.
CP2208 User Guide
020-101916-03 Rev. 1 (12-20120)
Copyright © 2020 Christie Digital Systems USA, Inc. All rights reserved.
Adjusting the image
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