Named 30CPQ150 and saved as a 128 KB PDF, this item appears to be a component datasheet, since the title follows a discrete semiconductor numbering pattern rather than a board number. No model, revision or brand is included. It is the kind of reference used to confirm pinout and package, read voltage and current ratings, and decide whether an alternative part can replace a shorted one in a power circuit. Read it in a PDF viewer and make sure the printed code on the installed part matches exactly.
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.