A schematic diagram for Dell hardware (board DA0JWAMB8C1). Shared as “da0jwamb8c1_Vostro 5560元件位置图.pdf” — a .pdf file, 166 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.