Adjusting The Los Coupling Mirror; Replacing Or Refilling The Coolant - Christie Cinema 4K-RGB CP4315-RGB Service Manual

Horizontal adjustments are controlled by adjusting knob 3.
Vertical convergence and rotation are controlled by adjusting knobs 1 and 2. Christie
recommends rotating a single knob a maximum of a quarter rotation before adjusting the
second knob a quarter rotation. For example, if using one hand, turn the left knob a quarter
rotation and then the right knob a quarter rotation, and so on. Adjusting a single knob for
vertical or rotational adjustment to an extreme before adjusting the second knob may result in
the convergence mechanism binding.
For the best stability, Christie recommends setting convergence while rotating the knobs in a
clockwise direction. This may require first adjusting convergence by turning the knobs counter-
clockwise, and finalizing the convergence with a clockwise approach. This applies to all knobs.
7. When complete, push in all the convergence adjustment knobs to disengage them.

Adjusting the LOS coupling mirror

Understand how to adjust the LOS coupling mirror.
1. Navigate to the laser power setting page, and decrease the red laser power to low (30% to
40%).
2. On a tripod in front of the lens, set up an illuminance meter (such as the Konica Minolta T10
Illuminance Meter) aimed at the center of the projection beam sent to the screen.
The illuminance meter must be facing the lens.
3. Set the green and blue laser power levels to 0.
4. Turn on the light source.
5. Display a white test pattern on the screen.
6. Wait 1 minute for the lasers to stabilize.
7. Remove the electronics-side cover.
8. Using a small, flat-head screwdriver, adjust the LOS coupling mirror to maximize the lux
reading on the illuminance meter. Only small adjustments are necessary.
9. Remove the illuminance meter from in front of the light beam, and adjust the blue and green
power levels to achieve a DCI white point, as measured by the color meter.
Make sure the red laser power is still set to low.
10. Visually check for uniformity and fine tune the elbow mirror adjustment.
11. Once the adjustment is complete, adjust the laser power to the preferred level.
12. Replace the electronics-side cover and, using a 3 mm driver, secure the cover using the four
quick-access fasteners.
13. Proceed to adjusting the integrator rod and fold mirror (on page 23).

Replacing or refilling the coolant

Cinema 4K-RGB projectors rely on liquid coolant to maintain the laser optical subsystem at the
required operating temperatures. This section provides service instructions and safety precautions for
filling the reservoir unit and handling coolant.
Caution! If not avoided, the following could result in minor or moderate injury.
• Use protective eye wear and gloves. Follow workplace guidelines for using personal protective
equipment when installing, cleaning, and servicing the product.
Cinema 4K-RGB Service Guide–CP4315-RGB, CP4320-RGB, CP4325-RGB, CP4330-RGB
020-102713-03 Rev. 1 (11-2019)
Copyright 2019 Christie Digital Systems USA, Inc. All rights reserved.
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Service setups
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