Philips 43PUS6412/12 Service Manual page 10

3.2.2 IR board Control Unit
1. Unplug the connector from the SSB.
Caution: be careful, as these are very fragile connectors!
1. Remove all the fixation screws [1] and connector from the IR board control unit.
3. Remove the IR lens, IR board from the DECO_REAR_COVER.
When defective, replace the whole unit.