Filed with schematics, the 2SK1895 PDF (95.3 KB) is named after a single semiconductor. In JIS numbering a 2SK code denotes an N-channel FET, so look for datasheet content: pin diagram, maximum ratings and electrical characteristics. That information lets a technician check the device with a meter in the right orientation and select an equivalent with adequate voltage and current margin. The name gives no manufacturer, so verify the marking on the component before trusting the data.
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.