Schematic for the Samsung SM-J730FM, supplied as a 3.34 MB PDF. The name includes only the model code, with the FM suffix indicating that particular variant; no board revision is given. Pages like these allow tracing of supply voltages from the PMIC, inspection of charging and USB circuits, reading connector pinouts for the screen and cameras and identification of components on a shorted line. Any PDF viewer can open it. Check that the PCB markings match this exact variant before acting on part values or positions.
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 @tamirat_moobile. 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.