A 59.3 KB PDF for the 2SK3065 transistor, listed as a schematic, with a name that also carries the token KE and the SOT-89 package. KE is likely the marking code printed on the small surface-mount body, which helps when the full number is not shown; confirm it in the document. 2SK denotes an N-channel FET under JEITA naming. Use the sheet to match the SOT-89 pinout, check ratings and identify the part on the board.
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)