An archive of repair files. Shared as “LM181E1_1280_1024_V59_A81_2AV_CH.zip” — a .zip file, 2.43 MB.
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 @led_software. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip