Philips 20PT643F Service Manual page 22

Assembly/Board Removal
Comb Filter Assembly/Board (if present)
You can remove the Comb Filter panel from the family board by disconnecting it from
connector 1810 (located at the top of the AC power transformer 5520).
Top Control Assembly/Board (if present)
Figure: Top control removal
1. Remove the two screws (if present).
2. Pull the module down and backward (release it from the front hinge [M]).
3. Lift the board from its bracket while releasing the two fixation clamps. The board
hinges on the other side.