PDF reference for the 1SS404 part, filed under schematics, though the 1SS numbering points to a Japanese small-signal diode and the file is probably its datasheet. The name gives no device, manufacturer or board number, and the trailing underscore adds nothing. At 90.5 KB it should hold the electrical characteristics, package outline and marking. Use it when a diode near a power or signal line reads shorted and you need the correct replacement. Check the package and marking before substituting another 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.