Archive for the Lenovo IdeaPad Y450 laptop, packed as a 1.26 MB RAR. The name gives no board number, revision or content list, so whether it holds a schematic, boardview or firmware must be confirmed after extraction. Service archives of this size usually carry circuit diagrams that a technician uses to trace power rails, find the source of a short and identify components. Before relying on any document inside, compare the board number silkscreened on the PCB with the one printed in the file, since one model can ship with different boards.
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.