Printed Circuit Boards And Sensors; Housekeeping Board (Hkbg) - Christie CP2420-Xe Service Manual

Printed circuit boards
and sensors
Printed circuit boards (PCB) mechanically support and electrically connect the projector components.
Sensors convert information such as temperature, light, and communication into electrical signals.
Always wear an electrostatic discharge (ESD) strap and use insulated tools when replacing circuit
boards.

Housekeeping board (HKBG)

The housekeeping board (HKBG) acts as an interface board with the majority of the control devices
feeding into it, including fans, power supply input, IR receivers, and so on.
1. Remove the LVPS/LPS cover (on page 53).
2. Disconnect the following harnesses: J90, 88, 101, 87, 105, 112, 6, 114, 89, 76, 102, and 110.
3. Remove the eight screws securing the housekeeping board.
4. Replace the board, if required, making sure to align it with the two locating pins.
5. To re-install, follow these steps in reverse order.
CP2420-Xe and CP4420-Xe Service Guide
020-103566-02 Rev. 1 (07-2022)
Copyright © 2022 Christie Digital Systems USA, Inc. All rights reserved.
If printed, please recycle this document after use.
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