Indexed as a schematic, this 118 KB PDF carries only the number 271024, which most often points to a 27C1024-class 1 Mbit parallel EPROM datasheet, though the name alone does not confirm the vendor or the exact part. A technician would open it for the pinout, the programming voltage and timing before reading or burning the chip in a universal programmer. Read and save the original contents first, and verify the marking on the package matches before choosing a device profile in the programmer software.
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.