Samsung schematic file named only by model code I9000, which corresponds to the Galaxy S, supplied as a 13.6 MB PDF. No board revision or document type is given beyond the model. Such diagrams are used to trace supply rails, check for shorts on capacitor lines and find the parts behind charging, baseband or display circuits. Open it in a PDF reader and use search to jump to component references. Confirm that the board markings on the handset agree with the pages before relying on values.
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 @Schematic_ir20. 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.