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:

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

Then the font panel buttons can be locked by pressing the following front panel buttons in sequence,

VOL-, VOL-, SETTING, HOME

2. You can enter Debug menuàOther Setting then set button lock to be on.

Note: All buttons on the front panel except for “POWER” will be enabled/disabled.