RAR archive of 1.51 MB named 7512 with what appears to be version or revision 1.1; no brand, board maker or content type is identified in the name. The size could fit a schematic, a boardview or a firmware package, so the contents need to be inspected after extraction. If it turns out to be a schematic or boardview, use it to trace rails and locate components; if it is a firmware image, back up the original chip before writing anything. Confirm that the board marking matches 7512 and revision 1.1.
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 @cyberlanelectonik. 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.