PDF document, 103 KB, titled 30BQ040, a code that reads as a component part number rather than a motherboard number, so it should be treated as a datasheet despite the schematic category. The name holds no further details such as brand or revision. Repair staff use pages like this to confirm package style, polarity marking and voltage rating when a part in a power path is shorted or open. It opens in any PDF reader; check that the marking on the faulty component really matches before substituting from it.
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.