Lenovo IdeaPad Y510 schematic supplied as a 1.26 MB PDF. The name has no board number or revision, so identify the board from the title block and confirm that it matches what is printed on the motherboard. Technicians use such diagrams to follow the charger and system power rails, check the sequence of enable and power-good signals, find the BIOS flash and EC, and trace connector pins for ports, keyboard and display. Any PDF viewer opens it, and searching net names saves time.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.