Indexed under schematics, this 112 KB PDF carries the part number 2N6504, a designation from the JEDEC 2N registration system for discrete semiconductor devices. The name holds no further detail, so the file is best treated as the component datasheet, covering package outline, terminal identification, ratings and characteristic data. It supports identifying terminals before replacement, checking whether a part was overstressed, and selecting an equivalent. Any PDF viewer opens it; confirm the package matches before fitting.
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.