Archive named A15HC with revision 2.0, a project or board code whose manufacturer and brand are not stated in the name. The 10.4 MB ZIP contents are unknown, though files of this size in repair libraries usually hold schematics or boardview data. Such documents help trace power rails, find shorted components, follow signals and locate test points. Since the name gives little detail, extract the archive and compare the code and revision inside against the markings on your PCB before relying on any value.
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 @biosarchive_photos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.