PDF documentation for the 2SC5149, the largest of this batch at 193 KB. Under the Japanese JIS scheme the 2SC prefix denotes an NPN bipolar transistor, so the content should be a datasheet with ratings, curves and mechanical drawing rather than a board schematic. It supports repairs where a transistor has failed and the replacement must match voltage, current and dissipation limits as well as pin order. The name states no maker or revision, so confirm the marking on the part before use.
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.