Clean the Color Toner Density (CTD) Sensors

The Color Toner Density (CTD) Sensors measure the optical density of Toner deposited on the Marking Unit during the calibration cycles of the printing process. One sensor is located at each side of the Marking Unit to insure that the density of the Toner is consistent across the belt.

To insure optimum print quality, the printer checks the operation of the CTD Sensors at the beginning of each calibration cycle. When the printer indicates a CTD Sensor error or error message on the Control Panel or in the Printer Setting Utility, clean the CTD Sensors.

CAUTION:Do not use warm water or cleaning solvents to remove Toner (Dry Ink) from your skin or clothing. This will set the Toner and make it difficult to remove. If any Toner gets on your skin or clothing, use a brush to remove the Toner, or wash it off with cold water and mild soap.

To clean the CTD Sensors:

NOTE: The images in this procedure are for demonstration purposes only and may not specifically match your printer model; colors, icons, and other minor differences may exist.

1. Power off the printer by pressing the power switch to the off (O) position.
   
   
   
   NOTE: The power switch is located on the right side of the printer.
   
   

2. Unplug the power cord.
   
   
   
   

3. Push the Rear Cover release handle and open the Rear Cover.
   
   WARNING: Internal parts of the printer can be hot. Use caution when doors and covers are open.
   
   
   
   

4. Clean the CTD Sensors by wiping inside the access holes with a clean, dry cotton swab.
   
   
   
   

5. Close the Rear Cover.
   
   
   
   

6. Plug in the power cord.

7. Power on the printer by pressing the power switch to the on (|) position.