Article reference KA-02569
You can lock the control, press and hold menu button for 3 seconds when lock unlock comes up press the round button. Press menu to return back to the main screen.
Edel Child Lock Nov 2019 from GDHV Digital on Vimeo.
If the screen is still locked after holding MENU for 3 seconds, it may have been set to "pro lock" mode. To unlock, press ‘MENU’ for 3 seconds and then the CLOCK button and round DIAL button together for 3 seconds.
Applicable models: EDL170-520RF, EDL200-630RF, EDL270-630RF