Service archive for the Samsung SM-J720F, the dual-SIM Galaxy J7 Duo, packed as a 4.16 MB ZIP. Only the model is named, so confirm after extraction whether it holds schematics, a layout or both. Such documents let a repairer trace voltage rails, locate the charging circuit, SIM and display connectors, find test points and narrow down a short to a specific capacitor or IC. Samsung boards carry a revision code on the PCB; make sure it matches the documentation before replacing parts based on the values shown.
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 .zip file
Compressed archive that every operating system opens without extra software.