PDF sheet of about 41.1 KB for the 5LN02M, filed under schematics. Only the part code appears in the name; by the naming pattern LN likely marks the N-channel MOSFET line and M a package variant. Repair technicians open it in a PDF viewer to look up pinout, gate threshold, maximum drain-source voltage and current. Read the marking on the suspect component and match it, along with the package drawing, before relying on these figures or fitting an equivalent part.
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.