Named purely after 1SS322, this 73.1 KB PDF does not identify any device, board or revision. The code belongs to the JIS 1SS series of small-signal diodes, a numbering Toshiba uses widely, so the document is probably a component datasheet despite its schematic category. Read it to confirm the internal diode arrangement, pinout and marking, and to check whether a replacement candidate meets the voltage and current limits. Any standard PDF reader will display it, and the part marking on the board should be matched 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 @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.