Small 244 KB PDF schematic for the USB board of the Stanford project, also tagged ZHXS, marked as a RAMP release. The name does not state the brand or model. It covers a daughterboard, useful for tracing USB power and data lines, checking the connector to the mainboard and finding protection parts when ports are dead. It belongs with the matching mainboard and LED sheets of the same project. Open it in any PDF reader and confirm the board label and revision match your hardware first.
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 @afsschematicfree. 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.