An archive of repair files. Shared as “SANSUI_ 49VAOFHDS MS358_PC821_A26_49_WELCOME_8G_REF60_.zip” — a .zip file, 660 MB.
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 @tvsoftwareworld. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip