PDF schematic for the Samsung SM-A720F handset, 3.58 MB in size. Only the model code appears in the name, with no board revision or region details. Repair technicians typically use such pages to follow power distribution from the battery connector through the PMIC, identify charging and USB circuits, check display, touch and camera connector pins and work out where a short to ground might originate. Open it in a standard PDF viewer, and verify that the main board you are servicing matches this model before trusting component values or locations.
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.