A 136 KB PDF for the 2SK2887, with a 1-5 suffix in the name that most likely refers to page range or a document section, though this is not certain. Indexed as a schematic, it is probably the transistor datasheet. The 2SK code identifies an N-channel FET under JEITA naming. Use it to check pinout, maximum ratings and package before testing or replacing the part, and compare it with the other 2SK2887 file in the index if one seems incomplete. Verify the component marking first.
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.