Dell XPS 15 (L502X, Early 2011) - Manual (Page 76)

76 Subwoofer
10 Lift the subwoofer off the top cover.
Replacing the Subwoofer
1 Follow the instructions in "Before You Begin" on page 9.
2 Place the subwoofer on the base cover.
3 Replace the four screws that secure the subwoofer to the base cover.
4 Follow the instructions from step 8 to step 11 in "Replacing the Top
Cover" on page 69.
5 Replace the display assembly (see "Replacing the Display Assembly" on
page 52).
6 Replace the keyboard (see "Replacing the Keyboard" on page 45).
1 subwoofer 2 screws (4)
2
1