The file name provides just the part number 1SS307 for this 74.2 KB PDF, and no device context is given. Following JIS conventions, 1SS marks small-signal diodes, a numbering Toshiba uses across many parts, so expect a datasheet rather than a board-level schematic. In repair work it confirms pin assignment, polarity, forward drop and reverse limits, and helps decode tiny marking codes. Compare the package type and marking on the PCB with the document before fitting a replacement diode.
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.