Labelled 1SS268, this 126 KB PDF appears to be a datasheet for a single component even though the index lists it as a schematic. Parts with the 1SS prefix are small-signal diodes in the Japanese JIS numbering system. Repair work typically draws on such a sheet for the pin assignment, top marking and electrical limits, which matter when a diode in a protection or switching circuit tests shorted or open. Verify that the footprint on the PCB matches the package drawing before fitting a substitute part.
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.