Compressed archive named after the Quanta R23 platform, about 867 KB in RAR format. Quanta is a large notebook ODM and R23 is one of its internal project codes; the name gives no brand, retail model or revision. Material like this normally includes a schematic for tracing power rails, checking power sequencing and locating components during board repair. Find the project code on the motherboard, often in the DA part number, and confirm the revision before relying on the drawings.
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 @IT_SERVICE_WORLD. 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.