Code :

Code: U3-4210
Display: Top door of scanner is open.
Description: DADF cover is opened.
Remedy: 1) Close the DADF cover perfectly. 2) If this error occurs continually, Check the followings. a) Check the DADF cover open sensor(0604-001393) and its harness. If there is a defective part, replace it. b) If both of them are normal, check the Cover-Open Rib. If it is broken, replace the Cover-Open(JC63-03273A).