Lexmark T520 User's Guide - Page 183
Disabling operator panel menus
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46 Disabling operator panel menus To disable the operator panel menus so that changes cannot be made to the printer default settings: 1 Turn the printer off. Note: Disabling the operator panel menus does not prevent access to the Job Menu or to Print and Hold functionality. 2 Press and hold Select and Return and turn the printer on. 3 Release the buttons when you see Performing Self Test. Config Menu appears on the first line of the display. 4 Press Menu until you see Panel Menus, and then press Select. Disable appears on the second line of the display. 5 Press Select. Locking Menus appears briefly. 6 Press Menu until you see Exit Config Menus, and then press Select. The menus are disabled. If you press Menu, the message Menus Disabled appears. To enable the menus: 1 Repeat steps 1 through 4. 2 Press Menu until you see Enable. 3 Continue with steps 5 and 6. 181