A 98.0 KB PDF for the 1SS390, the largest of this group and filed as a schematic type. The name holds only the part number. Since 1SS marks the Japanese family of small-signal diodes, it is most likely a datasheet with characteristic curves, ratings and package information. No device or board details are given. Use it to identify the part by its marking code, confirm polarity and pin assignment, and select a substitute with adequate voltage and current limits. 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.