To clean the black mark sensor:
1.Turn off the printer and open the supply cover.
2.Remove the supplies. See “Removing Supplies” in Chapter 3 for more information.
3.Clean the black mark sensor with a dry cotton swab.
4.Reload the supplies and close the supply cover.
Cleaning the Scanner Window
Black Mark 
Sensor
Clean the scanner window whenever it appears to be dirty or smeared. To clean it:
1.Moisten a soft cloth with distilled water. Do not use household cleaners to clean the printer.
2.Wipe the window until it is completely clean.
Cleaning the Scanner Flex Cable
Occasionally, adhesive buildup appears on the scanner flex cable, as shown below. To clean the cable:
1.Turn off the printer and open the supply cover.
2.Inspect the scanner flex cable. At any place that adhesive buildup appears, clean the cable with 99% isopropyl alcohol and a cotton swab.
3.Close the supply cover.
Adhesive Buildup
Scanner Flex 
Cable
Care & Maintenance
