ASUS U80V archive, the first file in a numbered RAR set, with a compressed size of 430 KB. No board revision or document type appears in the name, so treat the contents as unidentified until they are extracted and inspected. Archives of this size often hold a schematic PDF or a boardview, which technicians use to trace power rails, check the source of a short and locate components. Check the motherboard markings against the documents before taking measurements or replacing parts based on them.
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 @ITHINKHS. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.