A 115 KB PDF named only 2N5461, with no manufacturer, board code or revision. Although catalogued as a schematic, the JEDEC 2N prefix points to a datasheet for a discrete device, and its size matches neighbouring 2N5460 and 2N5462 files, likely one family document. Technicians use it to confirm pin assignment and package and to compare grade-specific ratings. Open it in any PDF viewer, and check that the body marking on the part agrees before taking values from the tables.
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.