Part number 1N6392 names this 43.5 KB PDF, a component datasheet for a JEDEC 1N-series device filed in the schematic category. The name carries no other details, so the device type and limits must be read from the sheet, which normally contains a ratings table, characteristic curves and package dimensions. Such data is useful when a part has failed short or open and needs identification and replacement. Compare the package, polarity and rated voltage and current with the original before installing an equivalent.
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.