Applied model:

1. Americas: IFP**50 - Gen 1, IFP**50 - Gen 2, IFP**50 - Gen 3.

2. Asia Pacific & Africa: IFP**50, IFP**50-2, IFP**50-3.

3. Europe: IFP**50, IFP**50-2EP, IFP**50-3EP.

Please refer either method below:

1.You will need to set combination key to “ON” at Debug menuàOther Settingà Combination key.

Then the menu and input can be locked/unlocked by pressing the following front panel buttons in sequence:

VOL+, VOL+, SETTING, HOME

2. You can also directly set to ON in Debug menuàOther Setting to turn on this menu lock.