Service manual archive for the Samsung SM-A315G (Galaxy A31), with a Portuguese title, compressed into a 6.06 MB RAR. Such manuals typically cover disassembly steps, exploded views, parts lists and troubleshooting procedures, and some include board-level diagrams. The exact contents are not listed, so open the archive to see what is included. Confirm the model number on the phone's label or in its settings matches SM-A315G, since regional variants of the same phone can use different parts.
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 @esquemaseletricos. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.