Schematic PDF named AP, 204 KB, carrying no model, brand or board information in its file name. In mobile device schematic sets AP usually refers to the application processor section, so this sheet likely shows processor power rails, memory interfaces and control signals, though that cannot be verified from the name. Open it in a PDF reader and look at the title block for the product and revision. Treat it as part of a set and confirm a match with your board before measuring against 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 @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.