Small 1.34 MB ZIP archive labelled for the Xiaomi Mi 4 smartphone. The name gives only the model, so the contents, whether schematics, a layout or repair notes, have to be checked after extraction. Material of this sort helps a technician follow voltage lines, identify parts on the mainboard, locate test points and trace faults in charging, display or power-on circuits. Because a compact archive may hold only selected pages, verify coverage and compare the PCB revision printed on the board with the documents before relying on them.
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 @tamirat_moobile. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.