PDF of 41.0 KB titled 2SC4968 with an _E suffix whose meaning the name does not state. It is listed among schematics, but the 2SC prefix follows the JIS/JEITA designation for NPN bipolar transistors, so this is effectively a datasheet. Look here for maximum ratings, gain, switching or frequency data and the mechanical drawing with pin numbering. Verify the package and marking on the actual board first, then use the ratings to confirm that a substitute transistor can safely replace the failed one.
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.