Mitsubishi Diamond Plus 93SB Service Manual page 26

6. Remove the four screws (PL-CPTS*4*16*15BF) and remove the Chassis Base from Cabinet Front ASSY.
Screws (PL-CPTS*4*16*15BF)
7. Remove the seven screws (PL-CPTS*3*8*15BF) and two screws (PL-CPIMS*3*10*15BF).
8. Remove the Main Board from Chassis Base.
Screw (PL-CPTS*3*8*15BF)
Screw (PL-CPIMS*3*10*15BF)
3-4