Numeric file 272001 in PDF form, 124 KB, catalogued under schematics with no maker, device or part type stated in its name. It appears related to the 274001 and 274002 documents, which suggests a common source and numbering system, but the subject has to be confirmed by opening it. Documents of this size usually cover a single component or small circuit. Match the printed markings and package of the part on the board against the document before using any pin assignments or values.
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.