Archive for the Meizu M6, 3.02 MB in RAR format, with a name that gives the model but nothing about the document type. The larger size suggests several pages of schematics or layout drawings, though only extraction with WinRAR or 7-Zip will confirm the contents. Such service material lets a technician follow power rails, trace signals between connectors and chips, and find components to check when hunting a short. Confirm the board marking on the phone matches the documentation before relying on it for measurements.
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.