- 26 -11Optical unit removal.1.Remove the screw-A(M3x6), remove the 5 screws-B(T3x10), remove the Optical unit and removethe Spacer sheet bottom.ABBBB BFig. 11Optical unitSpacer sheet bottom12Filter board removal.1.Remove the 4 screws-A(T3x8), remove the screw-B(M3x6) and remove the Filter board.AAAABFig. 12Filter boardMechanical disassemblies