Schematic for the Samsung SM-J730FM handset in a 3.34 MB PDF. The model code is the only detail the name gives; no board revision is stated. This type of drawing lets a technician trace supply rails, follow charging and USB circuitry, read connector pinouts for display and camera, and identify which parts share a rail that reads shorted. The file opens in any PDF viewer. Check the model code printed on the device, because related J7 variants may use a different board layout or component set.
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 @Schematics_Mobile. 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.