It is always recommended to check the Changhong Europe Service Center or the Changhong Global Support site first. You will likely need your TV's serial number to find the exact matching file.
Ensure the file is renamed correctly according to your board's requirements. Download JUC7 820 00229436 1920x1080 Changhong part5 rar
Please provide your TV model number or panel type so we can help you find the exact firmware match. It is always recommended to check the Changhong