Indexed as a schematic, the 48.4 KB PDF named 16YQ100C carries no model, board or revision details, only a code in the International Rectifier rectifier style. The content is most likely a datasheet for one diode part, with maximum reverse voltage, current rating, curves and the case drawing. Repair technicians rely on such sheets to confirm a correct substitute and lead assignment for a shorted or open part. Read the actual marking on the faulty component and compare packages before installing a replacement.
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.