Datasheet for the 2N6975, 36.4 KB PDF, classified as a schematic though the name is a JEDEC part number for a discrete semiconductor. No manufacturer, package or revision is given in the name, and the small size suggests a short document. Open it in a PDF reader to read pin identification, maximum ratings and electrical characteristics. Before choosing a replacement, match the case outline shown inside with the original component and confirm that voltage and current limits are equal or higher.
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.