Sony SDM-E76D - Manual (Page 39)

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x Locking the menus and controls
You can lock the control of buttons to prevent accidental
adjustments or resetting.
1 Press the m/M buttons to select (MENU LOCK)
and press the OK button.
The MENU LOCK menu appears on the screen.
2 Press the m/M buttons to select ON or OFF and
press the OK button.
• ON: Only the 1 (power) switch will operate. If you
attempt any other operation, the (MENU LOCK)
icon appears on the screen.
• OFF:Set (MENU LOCK) to OFF. If you set the
(MENU LOCK) item to ON, only this menu item can
be selected.