Covering the 161cnq035, this 80.7-class PDF of 81.5 KB is indexed as a schematic yet looks like a Schottky rectifier datasheet, where the 035 suffix generally corresponds to 35 V reverse voltage. Expect electrical tables, characteristic curves for forward drop and leakage, and mechanical drawings. A technician uses it when sourcing a replacement for a shorted dual rectifier in a high-current supply. Confirm the complete code and package type on the failed part before selecting a substitute of equal or higher rating.
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.