Searchable component location map for the Xiaomi Redmi 3A main board, titled in Chinese, provided as a 3.35 MB PDF. The name notes that designators can be queried, so a PDF reader's search jumps straight to a part reference and shows where it sits on the PCB. Use it alongside the Redmi 3A schematic to find capacitors, inductors and test points while tracing power faults or shorts. Compare the board revision and layout markings on your phone with the drawing before relying on positions.
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 @mobileschematicshub. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.