The 2SC5317 transistor is the subject of this 122 KB PDF, which the index lists as a schematic though the name matches a datasheet. Japanese JIS numbering uses 2SC for NPN bipolar parts. You can expect maximum ratings, hFE classification, characteristic plots and a package outline with lead order. No manufacturer or device is mentioned, so check the component marking. A related FT-suffixed file exists, so confirm which variant is on the board before relying on package dimensions.
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.