PDF reference of 87.0 KB for the 2SC3820. The 2SC prefix is the Japanese JIS designation for NPN bipolar transistors, so despite the schematic label this is most likely the component datasheet; the name offers nothing beyond the number. Its pin diagram, maximum ratings and characteristic data support testing a suspect device, fitting a replacement in the right orientation and comparing cross-reference parts. Make sure the marking and package on your board correspond to this 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.