Schematic for the Quanta QT8 laptop motherboard, revision 1A, dated 19-02-2008 in the name and supplied as a 795 KB PDF. The notebook brand and model are not stated. Diagrams of this kind help trace power rails from the adapter input, locate the charger and system regulators and follow signals to connectors. Quanta board numbers follow the DA plus project code plus MB pattern, so look for a DA0QT8 marking and the revision on the PCB to confirm the document matches the board on the bench.
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.