PDF of 133 KB carrying only the part number 2N6790, placed in the schematic category. There is no model or board information in the name. The 2N designation belongs to the JEDEC numbering for discrete semiconductors, so expect a datasheet rather than a circuit diagram. Typical uses are confirming lead assignment, checking maximum ratings against the circuit, and qualifying an equivalent device. Make sure the physical package on the board matches the outline in the document.
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.