Listed as a schematic, a 115 KB PDF carrying only the part number 2N6342, part of the JEDEC 2N registration series for discrete semiconductors. The name provides no board or device context, so it is most likely a component datasheet with pin assignment, case drawing, ratings and characteristic data. During repair it is used to confirm terminal order before fitting a new part, compare measurements against specified values and choose a substitute. Check the package on your board matches the one shown.
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.