For the 153cmq080, this 44.5 KB PDF is categorised as a schematic but almost certainly holds a datasheet for a common-cathode dual Schottky rectifier rated around 80 V. It is the CMQ-package counterpart to the CNQ device of the same number. Use it to check per-leg current, forward voltage, thermal data and pinout when a supply rectifier has shorted. Compare the package drawing with the part on the board, since CMQ and CNQ versions differ mechanically, and confirm the full marking.
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.