PDF schematic for the Samsung SM-A530F, sized at 3.83 MB, with no revision or extra details stated in the name. A technician would open it in a PDF reader to follow voltage rails, inspect the charging path, locate connector pinouts and identify filter or protection components on a suspect line. Searching by net name or reference designator speeds up fault finding. Before relying on component positions or values, compare the board marking on the actual PCB, since regional sub-variants of a Samsung model can differ in parts fitted.
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.