Datasheet-type PDF, 212 KB, labelled with the part number 2SC2229 and filed in the schematic section. Following the Japanese JIS scheme, 2SC parts are NPN bipolar transistors, so look here for terminal identification, absolute maximum ratings, gain classification and characteristic curves. Technicians typically open it in any PDF reader while diagnosing a failed stage or comparing candidate equivalents. The name gives no revision or maker, so verify that the markings on the physical part match what the sheet describes.
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.