Short 310 KB PDF listed as a schematic and identified only by the code 00001772A, so no device, maker or board number can be read from the name. The size points to a single circuit, application note or datasheet rather than a complete mainboard schematic. Open it to identify the part it describes, then use the pin descriptions, typical application circuit and electrical limits to verify a suspected IC and the components around it during board-level repair.
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 @one5technology. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)