A schematic diagram for Lenovo hardware (board NM-A161). Shared as “Compal NM-A161 Lenovo ThinkPad Edge E540 ( Haswell).pdf” — a .pdf file, 3.23 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 @ShareMan_Electronic_Files. 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)