Aligning The Image; Adjusting Offset; Resetting The Lens To Home Position - Christie 4K40-RGB Series Service Manual

Aligning the image

Only perform image alignment after the projector is fully assembled and powered up in its final
location.
Basic image alignment ensures the image reflected from the DMDs is parallel and well-centered with
the lens and screen. This initial optical alignment is the foundation for optimizing images on the screen
and must be completed before final boresight adjustments. Before beginning, make sure the projector
is properly positioned in relation to the screen.
1. Ensure the projector is positioned in the throw distance range for the particular lens.
2. Display a test pattern.
3. Do a quick preliminary focus and (if available) zoom adjustment with the primary lens.
Do not worry about consistency across the image at this point, just center focus. It is good
practice to have zoom adjustment color and focus adjustment color in the center of its range.
4. Holding a piece of paper at the lens surface, adjust offsets as necessary until the image is
centered within the lens perimeter. A full white field works best for this.
5. If the projector is mounted off center to the screen axis, offset the lens as much as required.
Aim the projector over slightly towards the center of the screen, but use caution when doing
so, as too much tilt will cause excessive keystone distortion.
6. With a framing pattern on screen, double-check projector leveling so the top edge of the image
is parallel to the top edge of the screen.

Adjusting offset

Adjust the offset to align the image on the screen. Always adjust offset before adjusting boresight.
For the best optical performance and minimal keystone, use offsets instead of aiming at the center of
the image, in off-axis installations. Avoid extreme tilts or offsets. Corner vignettes on a white test
pattern indicate extreme offset that should be avoided using mechanical alignment.
1. Project an image with the primary lens.
2. Select a framing test pattern.
3. Select LENS OFFSET.
4. Use the arrows to adjust the offset to display a square image on the screen, with minimal
projector aiming error.
5. To exit to the home page, select Back.

Resetting the lens to home position

Realign the lens to the home position after the lens has been offset and out of alignment.
1. Select LENS OFFSET.
You can also select MENU > Configuration > Lens Settings > Lens Offset.
2. To reset the lens to the default home position, select Enter.
3. To confirm the reset, select OK.
4K40-RGB Series Service Guide–D4K40-RGB, Roadie 4K40-RGB, Mirage 4K40-RGB
020-102960-02 Rev. 1 (12-2019)
Copyright 2019 Christie Digital Systems USA, Inc. All rights reserved.
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Service setups
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