Component reference for the 1SS401, stored as a 77.2 KB PDF under the schematic type. The name holds just the part number, so this is most likely a manufacturer datasheet rather than a board schematic. The 1SS series uses the Japanese JIS-style numbering for small-signal diodes. When a diode on a rail fails short in diode mode, this sheet helps you read the marking code, verify polarity and choose a part with matching voltage and current ratings. Any standard PDF reader opens it.
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.