Mitsubishi

Service Menu Mitsubishi
Turn on TV, Press Menu then input the number 2, 3, 5, 7.
Carefully, do not RESET the factory data, it will disappered all data factory.
Select category Press Audio.
Press channel up or down to select parameter data.
Press volume up or down to change value.
To save the data press enter
After the ajustment completted, press menu 2 times.