KV-32XL90B - Sony TV Service Manual (repair manual). Page 14

To place the chassis in the service position, insert the main
bracket firmly into the T-slot located on the left corner of the
beznet as indicated (see inset). To gain access to the underside
of the boards follow the instructions on page 16. [Removal
and Replacement of the main bracket bottom plates].

To remove the D2 board remove the two screws circled,
release the clips circled and ease the board gently away from
the support bracket.

To remove the D board first remove the D2 bracket by
removing the two screws circled and releasing the four
clips (two on each side of the bracket). The D board can
then be removed using the same method as the G board
but with the necessity to remove only one screw from the
middle of the D board.

To remove the G Board remove the two screws from the
middle of the board, release the clips circled and ease the
board gently away from the support bracket.