Reference sheet for the 2SC5411, a PDF of 311 KB catalogued as a schematic. The name gives only the part number. The 2SC prefix follows the Japanese JIS/JEITA transistor designation for NPN bipolar devices, so the content is most likely a component datasheet. Its larger size suggests characteristic curves or several package options. Before swapping a failed transistor on a board, compare the marking code and footprint with the drawing and check that collector-emitter voltage, current and power ratings meet or exceed the original.
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.