Switching-diode reference named 1SS184, saved as a 69.3 KB PDF and filed by the index as a schematic. The underscore in the name carries no extra detail. Under Toshiba's 1S numbering, 1SS designates small-signal switching diodes, so the content is most likely the manufacturer data sheet. Use it to identify pinout and marking on the board and to read forward voltage and reverse current figures. It also confirms that a replacement part has the same internal configuration. It opens in any PDF viewer.
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.