Adjust Top And Bottom Boresight - Christie D4K25 User Manual

Section 1: Introduction
4.7

Adjust Top and Bottom Boresight

1. Focus the image at the top edge of the screen.
2. Loosen the vertical hold screw.
3. Extend the lens focus completely.
4. Adjust the Focus knob to retract the lens. Watch the image at the
top edge of the screen until it comes into focus. If the entire screen
is in focus, proceed to step 8.
5. Continue retracting the lens.
a. If the bottom edge of the image comes into focus before the
lens is completely retracted, adjust the vertical boresight bolt
to direct or aim the lens mount UP towards the top of the
screen to balance out the top/bottom edges.
b. If the top edge of the image is not in focus, adjust the vertical
boresight bolt to direct or aim the lens mount toward the bot-
tom of the screen.
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 - 5 until the top and bottom of the screen are both well-focused.
8. Re-focus the center of the image. The goal is for good focus at the center and on all sides.
9. Tighten the vertical hold screw to maintain your adjustments.
10. Check the boresight again.
4-4
Figure 4-5 Adjust Vertical Boresight
Vertical
Boresight
Bolt
Figure 4-4 Vertical Boresight
D4K25 User Manual
020-100882-02 Rev.1 (7-2012)
Vertical
Locking
Screw