Schematic in PDF form labelled VX9G5M, with the added word SIMILAR suggesting it is a close or compatible design rather than an exact match for that board. The name gives no brand, revision or chipset, so the device it serves must be confirmed by comparing part references and connector layout with the actual PCB. Use it to trace power rails, follow signal paths and identify components around a fault, but treat every value as provisional until the board markings and circuit topology have been checked 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 @oficinacomputadores. 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.