Sony Vaio notebook archive for a Quanta-designed board with the project code RJ9, which appears twice in the name. The laptop model is not stated, so match the RJ9 code against the marking on the PCB rather than the chassis label. At 775 KB the RAR is sized like a compressed schematic, the kind technicians use to trace power rails, locate MOSFETs and inductors, and work through a dead-board diagnosis. Quanta project codes are two or three characters, and a matching revision matters as much as the code.
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 @generalschematics. 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.