ZIP archive named TNPA6382, 3.84 MB. TNPA is the prefix Panasonic uses for printed board part numbers in its TVs, so this file likely relates to that board, though the name does not state the model or whether it holds schematics or firmware. Unpack it to identify the contents. Board-level documents help trace supply rails, find failed parts and check connector pinouts. Check that the TNPA number printed on the PCB in the set matches exactly, as Panasonic revisions can differ in detail.
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 @gunvantrathore. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.