Toshiba-labelled ZIP archive of 4.80 MB referring to FMEKSY1, with the extra codes A4369A, E89382 and HSB in the name. These look like board or part identifiers, but their exact meaning is not certain, and the name does not say whether the contents are schematic, boardview or firmware. Open the archive to identify the files before use. Whatever it contains, compare the codes printed on the Toshiba board with those in the name so you are working from documentation for the correct hardware.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.