Performing The Dac Calibration - Christie 4K40-RGB Series Service Manual

If the difference is less than eight degrees wait for a few more minutes and take another
reading until the blue temperature is at least eight degrees higher than the original reading.
You may need to modify the actual room temperature to achieve the target blue temperature.
22. Adjust the blue and green power levels to achieve a DCI white point, as measured by the color
meter. Do not adjust the red value.
23. Send the command (RGB + MEAS?) to the photon controller.
The system retrieves the color sensor X, Y and Z values, and the blue and red devices
temperatures.
24. Verify line 63 of the spreadsheet has the values identified in step 10.
25. Enter the values returned in step 23 into line 64 of the spreadsheet.
The spreadsheet automatically calculates the calibration data and populates line 96 on the
calculator.
The temperature values reported in NetTerminal must be divided by 100 before being entered
on line 27 and Line 63.
26. Type the command on line 96 of the spreadsheet into NetTerminal or Kore Librarian and send it
to the photon controller.
The calibration data is saved to the color sensor board.
27. To reset all fans to the normal operating speed, reboot the projector.

Performing the DAC calibration

Calibrate the black levels for the new color sensor board.
1. Prepare the projector for DAC calibration:
a) Turn off the laser light.
b) Close the shutter.
c) Install the lens cap.
The lens cap minimizes any stray light entering through the lens and maximizes darkness
around the sensor during the calibration.
2. Connect the laptop to the photon controller using Net Terminal or Kore Librarian, with port
5103.
3. To start the DAC calibration, send the following command: (ENG+CALB 0 0).
This process takes approximately one minute. The system displays information on the start
and finish of the calibration process. DAC calibration is only required after replacing the color
sensor board.
4. Remove the lens cap.
5. To complete the calibration, power cycle the projector.
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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