Schematic in PDF for Dell desktop board 15140-1, shared by the Vostro 3668, 3669, 3268, 3667, 3660 and 3267.

The 2N5087 is the only detail in the name of this 100 KB PDF, catalogued as a schematic but most likely a part datasheet.

PDF copy of USB Complete, third edition, an 8.27 MB reference book on the Universal Serial Bus rather than a board schematic.