A schematic diagram for Lenovo hardware (board NM-A121). Shared as “联想 YOGA 11S 板号 NM-A121 小板.pdf” — a .pdf file, 454 KB.
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)