A 50.7 KB PDF categorised as a schematic, carrying only the short code 120nq and no product, board number or revision. The name follows a pattern seen in rectifier diode part series, so the content is probably a component-level sheet. It opens in any standard PDF viewer. Repair technicians consult such documents to check maximum ratings, pin assignment and package outline before fitting a substitute. Confirm the complete marking on the original component, as the name does not state a voltage grade.
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.