A 71 KB PDF named 90clq100, listed as a schematic but most likely a datasheet for a dual Schottky rectifier module in the CLQ series, the 100 commonly indicating a 100 V reverse rating. The vendor is not stated in the name. Such data is used to confirm pin configuration, current capability, forward drop and thermal limits when diagnosing a failed rectifier in a switching supply. Test the suspect part with a diode meter, and match the package and ratings 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.