Samsung SM-G850F schematic, a 14.7 MB PDF document. Only the model number is stated in the name; no revision or region is given. The larger size suggests detailed pages, which can cover power management, charging, RF and connector circuits, useful for tracing rails, finding test points and locating a shorted part. Any PDF viewer with search makes it easy to jump to component designators. Before working from it, compare the board marking and component layout on your phone with what the document shows.
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 @schematic_mobiles. 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.