Compressed archive of 6.89 MB listed for the TCL 40D3200 LED television. The name holds only the brand and model, so it does not state whether the package is firmware, a schematic or service notes. At this size it may be a flash memory image for the main board. Extract it with an archiver such as 7-Zip and look at the file sizes. Before programming, back up the chip in the set and check that the board number printed on the PCB matches the board the file came from.
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.
7-ZipWinRARThe Unarchiver (macOS)