Spanish PDF titled as a course topic with the abbreviation A.I., whose meaning is not clear from the name alone, so the content should be checked by opening it. No device, brand or board number is given. At 2.14 MB it likely contains illustrations as well as text, in keeping with other numbered topic files from a mobile repair training series. Use it as study material and compare it with the rest of the series, since it is not a schematic for any particular motherboard despite its catalogue category.
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 @canalesquematicos. 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.