Service archive for a device identified as G525-U00, packed in a 4.26 MB RAR file with no brand given in the name. The U00 suffix denotes a specific hardware variant, so documents inside should match that exact version. Such packs typically hold circuit diagrams or repair notes that help a technician follow the power tree, check charging and USB lines and find test points for no-boot faults. Extract with 7-Zip or WinRAR, read the contents, and match the board marking on the phone before using any diagrams.
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_mobile_iran. 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.