Filed under schematics, this 344 KB PDF carries the part number 2SC5445, which follows the Japanese JIS 2SC prefix for NPN bipolar transistors, so it is most likely a component datasheet rather than a board diagram. The name gives no further details about package or ratings. Use it to confirm pinout, maximum voltage and current, and gain before fitting a substitute. Check the marking on the failed part against the document, since similar numbers can differ in case style.
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.