Replacing The Housekeeping Board (Hkbb) - Christie Cinema 4K-RGB CP4315-RGB Service Manual

4. Replace the IMB.
5. To re-install, follow these steps in reverse order.

Replacing the housekeeping board (HKBB)

The housekeeping (HKBB) board acts as an interface board with the majority of the control devices
feeding into it, including fans, power supply input, shutter, IR receivers, and so on.
1. Remove the top cover (on page 39).
2. Loosen the two captive screws securing the HKBB bracket and remove the bracket.
3. Disconnect the 12 harnesses from the housekeeping board.
The harnesses to disconnect: J30, J81, J85, J89, J101, J102, J103, J104, J105, J110, J112,
and J129.
4. Remove the bracket and housekeeping board from the projector.
5. Remove the 13 screws securing the HKBB board.
6. Pull back the harnesses and remove the board.
Cinema 4K-RGB Service Guide–CP4315-RGB, CP4320-RGB, CP4325-RGB, CP4330-RGB
020-102713-03 Rev. 1 (11-2019)
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Printed circuit boards and sensors
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