PDF of 112 KB identified only as 2SC4675, indexed under schematics. The 2SC prefix follows JIS numbering for NPN bipolar transistors, so this is most likely the datasheet for that part. The name provides no maker, revision or package information. Use it to check pin order before removal, look up breakdown voltage, collector current and dissipation, and compare candidate substitutes, ensuring the package and marking on the board actually match the documented device.
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.