TCL 29B330 television package, a 2.09 MB RAR archive. The name provides brand and model only, no chassis, mainboard number or firmware revision, so the content type must be checked after unpacking. Such archives commonly hold flash or EEPROM dumps for restoring a set that will not start, or schematic pages for fault finding. Use WinRAR or 7-Zip to extract. Save the original memory with a hardware programmer before writing, and confirm the chip capacity matches the image size.
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 @hashmielecom. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.