This phenomenon is due to the signal strength of the different programs from the broadcasters. This TV is not capable of changing the strength of the incoming signal.
You can minimise the difference in volume by setting the Auto volume mode in the TV Menu to [ON]:
- Press the [Menu] button on the remote control to access the [Home] menu
- Use the cursor buttons [Down] to select [Setup] and press the [OK] button to confirm
- Press the cursor [Down] to select [Sound] and press the cursor [Right]
- Press the cursor [Down] to select [Auto Volume] and press the cursor [Right]
- Select [ON] and press the [OK] button to confirm
- Press the [Back] button to exit the Menu