A schematic diagram for Lenovo hardware (board 19705-1M). Shared as “Lenovo IdeaPad 19705-1M schematic(PDF)PK.pdf” — a .pdf file, 2.35 MB.
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 @pkbiosbdv. 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.