11 Insert the standard 250-sheet tray into the printer, and push until it stops.

Cleaning the CTD Sensor

Clean the Color Toner Density (CTD) sensor only when an alert for the CTD sensor is shown on the Status Monitor or operator panel.

1Ensure that the printer is turned off.

2Pull the standard 250-sheet tray out of the printer about 200 mm. Hold the standard 250-sheet tray with both hands, and remove it from the printer.

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Maintaining Your Printer

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Dell 2150cn manual Cleaning the CTD Sensor, 392