PDF of 148 KB named after the JEDEC-registered semiconductor 2N6758, filed among schematics. The name offers no brand, device or revision data. It most likely contains a datasheet with ratings tables, characteristic curves and a package drawing. Typical use is checking pin order before testing a suspected short, confirming specifications against the circuit, and qualifying a replacement. Read the marking on the original component and confirm the package before depending on the information.
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.