A 177 KB PDF describing the 2SC4689, placed in the schematic category of the catalogue. Japanese JIS numbering assigns the 2SC prefix to NPN bipolar transistors, so this is effectively part data rather than a circuit drawing. It helps confirm the pinout and package before removal, and gives the ratings needed to judge whether a proposed equivalent is suitable. Open it in any PDF viewer, and cross-check the printed code on the board component, as near-identical numbers in this range belong to different devices.
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.