Datasheet-style document for the 2SC5405, stored as a 37.3 KB PDF in the schematic category. Nothing beyond the part number appears in the name. Japanese JIS/JEITA numbering assigns the 2SC prefix to NPN bipolar transistors, so this is a reference for one discrete part rather than a circuit diagram. Use it to check the pinout of the package, read the maximum collector current and voltage, and verify that any replacement shares the same footprint and has ratings at least as high as the part being removed.
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.