Xiaomi Redmi 3s schematic collection, code name land, delivered as a fairly large 32.7 MB ZIP archive that is filed under firmware in the index. The size suggests several documents or high-resolution pages, possibly with layout drawings, though the name does not list the contents. Use the diagrams to follow supply voltages, charging circuitry, display and camera connector pinouts, and to find components when diagnosing no-power or no-charge faults. Unpack it and check that the board marking on the handset matches the drawings before measuring.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →