Revision-tagged PDF of 116 KB for part 2N5460, the rev0x token apparently marking a document edition whose exact number is not given. It is grouped with schematics but is most likely a datasheet, as 2N codes are JEDEC designations for discrete semiconductors. No board or device appears in the name. Compare it with the untagged 2N5460 sheet in the index if any figures differ. Use it to confirm pinout, package and ratings, and verify the marking on the physical part before substituting.
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.