Adjust Offset; Adjust Horizontal Boresight - Christie D4K2560 User Manual

Adjust the Image

Adjust Offset

Project an image with the primary lens. Always adjust offset
before adjusting boresight.
Select a framing test pattern and then adjust the vertical (A)
and horizontal (B) offsets to display a square image on the
screen, with minimal projector aiming error.
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.

Adjust Horizontal Boresight

The purpose of boresight adjustment is to balance the tilt of the lens mount to compensate for
screen-to-projector tilt, and to precisely maintain the original factory settings of the lens mount axial
position.
1. Loosen the lens mount stabilization screw (D).
2. Loosen the horizontal lock screw (A).
3. Extend the lens focus (B) completely.
4. Adjust the Focus using the focus knob to retract the lens.
Watch the image at the left edge of the screen until it
comes into focus. If the entire screen is in focus, proceed
to step 7.
5. Continue retracting the lens.
a. If the right side of the image comes into focus
before the lens is completely retracted, adjust the
horizontal boresight bolt (C) to balance the left and
right edges.
b. If the right side of the image fails to focus, adjust the horizontal boresight bolt (C).
6. When both sides appear equally blurry, adjust the offsets to re-center the image.
7. Repeat steps 1 to 5 until both sides of the image are focused.
8. Tighten the lock screw (A) and the lens mount stabilization screw (D) to maintain the adjustments.
9. Check the boresight again.
10. Unless proceeding to adjust vertical boresight, perform a lens calibration as described in
Calibrate the Lens Motors
30
on page 49
A
B
A
C
D4K2560/Mirage 4K25 User Manual
020-101076-02 Rev. 1 (11-2013)
D
B