Circuit diagram for the Quanta GC3 board at revision 2A, with G-Note mentioned in the name, apparently as a platform tag. The name does not say which laptop brand uses this board. Quanta builds notebooks for several brands under project codes like GC3. Technicians open such a PDF in a normal reader to search nets, follow the charger and main power stages, and confirm part values when replacing failed MOSFETs or controllers. Check the board revision first, since layouts change between versions.
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.