Chapter 9: Administrative Support; Adjusting Operator Panel Brightness And Contrast; Disabling Operator Panel Menus - Lexmark T640 User Manual

9
Administrative support

Adjusting operator panel brightness and contrast

If you are having trouble reading your operator panel display, the LCD contrast and brightness can be adjusted through the
utilities menu.
The LCD Brightness and LCD Contrast settings are adjusted separately. To change the LCD Brightness or LCD Contrast
settings:
1
Make sure the printer is on.
2
Press on the operator panel.
3
Press until the
4
Press until the
5
Press until the
6
Press to increase the brightness or contrast, or press
7
When the adjustment is complete, press
This saves this setting as the new user default, and the printer returns to Ready.

Disabling operator panel menus

Since many people could be using the printer, an administrator may choose to lock the operator panel menus to keep
others from changing menu settings from the operator panel.
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 Print and Hold functionality.
2
Press and hold
3
Release the buttons when you see a clock.
CONFIG MENU appears on the first line of the display.
4
Press until the
5
Press until the
The following messages appear briefly: Submitting selection and Disabling Menus.
The operator panel returns to Panel Menus.
6
Press until the
Activating Menu Changes appears. The menus are disabled, and the printer returns to Ready.
appears next to Settings, and then press
appears next to Utilities Menu, and then press
appears next to the LCD setting you want to change, and then press
.
and while turning the printer on.
appears next to Panel Menus, and then press
appears next to Disable, and then press
appears next to Exit Config Menus, and then press
Administrative support
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to decrease the brightness or contrast.
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