Sharp PN-L803C Service Manual page 157

4) Remove the 17 screws (M3x6 SW+W) and remove the Main I/F PWB with the plates.
4) Remove the six screws
B-Tight screw), and remove the Main PWB from the IF Angles.
Screw O M3x6 SW+W
O (M3x6 SW+W), the four hexagonal screws
△
Screw M3x8 Hexagonal Screw
PN-L803C/80TC3 DISASSEMBLY AND ASSEMBLY 6 - 13
△
and the two screws

Screw M3x8 B-Tight screw

(M3x8