Schematic for the Samsung Galaxy S8, model SM-G950F, delivered in an 18.2 MB RAR archive; the name is in Spanish and means S8 schematic. Expect circuit pages covering the power management, charging, display, audio and RF sections. A technician uses it to follow supply rails, check lines for shorts, read net names for voltage measurements and find test points. Extract with WinRAR or 7-Zip and open in a PDF viewer, and confirm the phone is the SM-G950F rather than the S8 Plus or the Snapdragon variants.
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 @esquematicosdecelulares. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.