ZIP archive labelled for the Redmi Note 4G, 32.9 MB, catalogued as firmware, though the name does not say whether it is a flashable image, schematic set or mixed service package. The relatively large size could fit several documents or firmware files. Extract it and identify what is inside before using it. Schematics would help trace power and charging circuits and find components; any flash files should be matched to the exact model and board variant, and the device data should be backed up before writing anything.
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 →