Brief 28.6 KB PDF titled with the part number 2SC5682, which under JIS rules belongs to an NPN bipolar transistor, so it is presumably a datasheet. No other information appears in the name. Use it to verify the lead order before testing junctions with a meter and to make sure a replacement meets the stated voltage, current and dissipation limits. Check suffix letters on the original, since they can denote gain grades or package variants.
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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)