PDF of 105 KB for the 2SC3253, stored in the schematic category though it most likely contains the transistor datasheet. The 2SC prefix identifies NPN parts under JIS numbering; package and ratings are not stated in the name. Use the pin diagram to probe the correct leads, verify breakdown voltage and collector current before choosing a substitute, and check that the physical case matches the footprint on the board.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)