Replacing The Front Ir Sensor Board; Replacing The Housekeeping Board (Hkba) - Christie Boxer 4K Series Service Manual

Replacing the front IR sensor board

The front IR sensor board receives command codes from the IR remote to control the projector
operation.
Estimated replacement time: 4.5 minutes
1. Remove the front cover (on page 33).
2. Remove the two screws securing the front IR sensor board to the bracket.
3. Disconnect the front IR harness (J108_F).
4. Replace the board.
5. To re-isntall, follow these steps in reverse order.

Replacing the housekeeping board (HKBA)

The housekeeping (HKBA) board acts as an interface board with the majority of the control devices
feeding into it, including most of the fans, convenience light board, IR receivers, lamp drivers, and so
on.
Estimated replacement time: 8.5 minutes
1. Remove the top cover (on page 34).
2. Disconnect 21 harnesses.
The 21 harnesses to remove: J80, J79, J30, J71, J74, J73, J72, J75, J88, J87, J83, J81, J76,
J89, J84, J82, J78, J70, J92, J77, and J117.
Boxer 4K Service Guide
020-101699-04 Rev. 1 (02-2018)
Copyright 2018 Christie Digital Systems USA, Inc. All rights reserved.
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Printed circuit boards and sensors
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