Listed as a schematic, this compact 47.4 KB PDF is named 80CLQ150, a code that resembles a power semiconductor part number rather than a board number. No brand, model or revision appears in the name. The document is most likely a component datasheet giving package drawing, pinout and electrical limits. Such sheets help when a rectifier in a power supply tests shorted and a replacement with equal or higher ratings is needed. Confirm the marking on the original part and compare package dimensions before fitting a substitute.
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.