Archive named KSBA-BB, a 1.22 MB ZIP file whose name gives no brand, model or document type. KSBA could be an internal board or project code, but this cannot be confirmed from the name alone, so open the archive to find out what it contains. Repair archives of this size usually hold a firmware dump, a boardview or a small schematic set. Before using any file inside, compare the board markings on the PCB against the documentation, and if it is a dump, back up the original chip first.
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 @gunvantrathore. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.