![]() Please make sure that the drum unit is correctly installed, and install a new drum unit, if the message is still displayed afterwards. ![]() ''Insert Drum 091-972 Insert/Reseat Imaging Drum'' – The built-in monitoring system is not detecting the drum unit. A new drum unit must be installed as soon as possible. ''Imaging Drum 091-935 Replace Imaging Drum'' – The print resource of the installed drum unit has been completely exhausted/consumed. ''Ready to Print NNN-NNN Imaging Drum Replace Soon'' – The installed drum unit needs to be replaced soon, because it is near the end of its useful life. All of the warning and error messages used by the built-in system for an indication of a drum unit related abnormalities are listed and described below. You should take the appropriate actions, when such message is displayed on the control LCD. Because of these facts, the installed drum unit is constantly monitored by the sophisticated built-in system of your color laser device, which will display a warning or an error message on the control LCD, when a drum unit related problem occurs. This component must be replaced before the complete exhaustion of its print resource, in order to be avoided a variety of print quality issues and an excessive toner consumption. ![]() The drum unit installed in your Dell Color 5110CN Laser Printer is a very important consumable component, which has a print resource enough for approximately 35000 pages/prints at 5% coverage.
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