Compact 55.8 KB PDF called 30CPQ080, filed as a schematic although its name looks like a semiconductor part code, so the content is most likely a datasheet. The name carries no device, brand or revision details. Repair technicians use such sheets to verify which pins are anodes and which is common, check ratings and package outline, and choose an equivalent when the original fails. It opens in any PDF reader; compare the code printed on the component, including suffix letters, before relying on these figures.
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.