Netbook schematic named NB300-305, a 483 KB PDF, which most likely corresponds to the Toshiba NB300 and NB305 series although the file name itself gives no brand, board number or revision. Check the title block and the code on the motherboard before relying on it. Uses include tracing the charger and voltage regulator circuits, following the power-on sequence, checking signal lines to memory and connectors, and pinning down which component shorts a rail. It opens in any PDF viewer, where net-name search speeds up diagnostics.
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 @cyberlanelectonik. 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.