Archive for the Xiaomi Mi 9T Pro, sold in some markets as the Redmi K20 Pro, packed as a 1.01 MB zip. The file name gives no detail of its contents, and at this size it most likely contains schematic pages or a parts-placement drawing rather than firmware. Such documents help with locating components, checking supply lines around the PMIC and display connector, and finding measurement points during board-level repair. Verify the PCB revision printed on the mainboard matches before following any diagram inside.
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.