Short 32 KB PDF labelled 2SK1445LS, listed among schematics. The LS suffix suggests a variant of the 2SK1445, but the name does not define what it changes. Since 2SK is the JIS designation for N-channel FETs, expect a condensed data or package sheet. A technician can use it to confirm pinout and principal ratings before measuring or replacing the device. Check the complete marking on the board, and cross-reference the full 2SK1445 sheet to avoid mixing up 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.