A 2.36 MB RAR archive labelled TCL F3380, which reads as a model series rather than a full model with screen size. No chassis, board number or content type is stated, so inspect the files after extraction. TV service packs like this commonly provide schematics or firmware used for diagnosing power, backlight and boot faults. Because the name is incomplete, confirm carefully that the model and mainboard markings of the set match before using any diagram or flashing an image, and back up the original chip first.
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.