A 43.4 KB PDF listed among schematics and named for the 2N6515, a JEDEC 2N-series discrete semiconductor. Nothing else is given in the name, so expect a concise datasheet rather than a board-level diagram. When a component fails, a technician uses this sheet to read the lead assignment, confirm voltage and current ratings, and look for compatible replacements. A larger RE-marked copy of the same number exists in the collection and may contain fuller curves or a different maker's figures.
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.