Schematic PDF of 1.6 MB named only Y300, which most likely refers to a Lenovo IdeaPad Y300-series device, though the name does not state the brand or board number. Open it to check the title block for the actual ODM board code and revision before using it. A laptop schematic helps follow power sequencing, locate the source of a short and identify charger, CPU and memory rails. Always confirm the board identifier printed on the PCB matches the drawing.
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 @mobileshematic. 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)