Control panel calibration issue

What you will see

When you press buttons or keys on the touchscreen panel, the device tends to show a different area, key, or button than the one you selected, one that is above the actual area pressed. Alternatively, it can appear that the button is being pressed but nothing is selected. This latter issue happens for buttons such as "Home" and "Submit", where there is not another button immediately above.

NOTE: This calibration issue is less severe as you go to the top of the control panel.

See sample video below.

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Recommended Action

A sagging touch screen can cause this panel calibration issue, which can occur if the foam spacer between the touch screen and the LCD becomes too loose. Thus, when you touch a portion of the touch screen, you actually interact with the area corresponding to the LCD point above the one you touched.

To determine whether the panel calibration issue is caused by a sagging touch screen, put your finger on the middle of the touch screen. Press and hold the screen, then slowly move the screen physically up and down. If the touch screen moves then the Operator Panel Assembly needs to be replaced. Please contact Lexmark Technical Support or a local authorized service provider for additional assistance.

NOTE: If the panel calibration issue is not caused by a sagging touch screen, please proceed with the Recommended Solution below.

Recommended Solution

Update the printer’s firmware to EC4 or the latest.

LEGACY ID: TE599