PDF schematic for the Samsung Galaxy SM-A720F, 3.58 MB, describing the handset's main board design. Handy for fault-finding on power, charging, audio, display and RF sections: follow a rail from the PMIC to its consumers, spot which component may be shorting it, and check expected signals at connectors. Any PDF reader opens it. The file name states no board revision, so compare your PCB against the drawings first, since component designators and values can shift between revisions or regional builds.
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.