Schematic for the Samsung SM-J200F, stored as a 5.21 MB PDF document. The file name states only the model number, with no revision or region noted. Such service schematics let a repairer trace battery and charger rails, check the PMIC outputs, follow USB, SIM, display and button lines, and find where a shorted capacitor might sit. It opens in any common PDF viewer. Before measuring against it, make sure the board revision printed on the handset PCB matches the version this document describes.
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.