Service schematic for the first Xiaomi smartphone, the Mi 1, packed into a 519 KB ZIP archive. On an older handset like this the diagrams are especially valuable for following battery and charging circuits, power-management outputs and connector pinouts, and for identifying components that have no other documentation. Extract the archive and view the sheets in a PDF reader. Compare board markings and revision on the actual PCB with the drawing, since early production units were sometimes revised during the model lifetime.
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.