Positivo laptop schematic tagged POS-AG31AP, 2.06 MB PDF, apparently a duplicate copy of the same document. Positivo is a Brazilian computer brand whose notebooks are built on boards from various ODMs; the name does not state the board maker or revision, so check the markings printed on the PCB against the title block. Use the schematic to trace power rails, follow signal paths, verify component values and locate parts on a shorted net. It opens in any PDF viewer.
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 @abgm_manutencao_esquemas. 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.