Specification sheet for the 2SC5276, a 136 KB PDF. The 2SC designation follows the Japanese JIS scheme for NPN bipolar transistors, so the document is probably the manufacturer datasheet rather than a board schematic. It should provide limits, electrical characteristics, pinout and package drawing. Use it to confirm lead order before measurement and to compare ratings when finding a replacement. Check that the part number and package on the board correspond to the file.
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.