A PDF of about 155 KB for the JEDEC part number 2N6338, filed under schematics but almost certainly a component datasheet. The RE ending in the name is not explained, so it could mark a revised edition of the sheet. The 2N prefix is the JEDEC code for two-junction semiconductors, mostly bipolar transistors. A technician uses a sheet like this to confirm pinout, case style, voltage and current ratings, and gain before fitting a replacement. Check the marking on the part on your board before relying on it.
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.