RAR archive of 5.61 MB for the OPPO R15 smartphone. Only the model appears in the name, so the contents, whether schematics, board layouts or both, need to be checked after extracting with WinRAR or 7-Zip. Documentation like this is used to follow charging and battery lines, trace supplies from the power management IC and identify test points and components when diagnosing shorts or no-boot faults. Confirm the board marking matches the drawings, since OPPO models can ship with regional board variants.
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 @cyberlanelectonik. 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.