An archive for the Xiaomi Redmi Note 6 Pro, code name tulip, about 1.12 MB in RAR format. Although it is catalogued as firmware, the name says Schematic, so it most likely holds circuit diagrams rather than a flashable image. A schematic of this phone helps trace PMIC outputs, charging and battery lines, and display connections when diagnosing a dead or shorted board. Extract it and check that the board revision matches the device. Another archive of the same size and model is probably the same content.
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 @cyberlanelectonik. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →