PDF schematic named scala3-14, which looks like an internal ODM project code, probably for a 14-inch platform, though no brand or board number is given. The document is 1.04 MB and opens in any PDF reader. Schematics let a technician trace power rails, read the power sequencing, check component values and find where enable and power-good signals go. Compare the project name and revision on the schematic cover sheet with the markings on your board before relying on it.
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 @schematiclaptopramkushwaha. 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.