• Code: E412-0006
• Description: DF Cooling Fan kept rotating
  The DF Cooling Fan is not stopped. (Signal is still being sent.)
• Remedy: 1. Disconnect and then connect the connector. 2. Check if the cable is open circuit. 3. Replace the fan. 4. Replace the DF Driver PCB.

• Code: E413-0001
• Description: DF Disengagement Motor error
  Lead Roller 1 disengagement error
• Remedy: 1. Open the ADF Front Cover, and then check the operation of active Disengagement Motor. 2. Check the physical position of Disengaging HP Sensor and its flag. 3. Check that the Cable of Disengaging HP Sensor is not open-circuit. 4. Replace the DF Driver PCB.

• Code: E413-0002
• Description: DF Disengagement Motor error
  Lead Roller 1 disengagement error
• Remedy: 1. Open the ADF Front Cover, and then check the operation of active Disengagement Motor. 2. Check the physical position of Disengaging HP Sensor and its flag. 3. Check that the Cable of Disengaging HP Sensor is not open-circuit. 4. Replace the DF Driver PCB.

• Code: E413-0011
• Description: DF Disengagement Motor error
  Lead Roller 2 disengagement error
• Remedy: 1. Open the ADF Front Cover, and then check the operation of active Disengagement Motor. 2. Check the physical position of Disengaging HP Sensor and its flag. 3. Check that the Cable of Disengaging HP Sensor is not open-circuit. 4. Replace the DF Driver PCB.

• Code: E413-0012
• Description: DF Disengagement Motor error
  Lead Roller 2 disengagement error
• Remedy: 1. Open the ADF Front Cover, and then check the operation of active Disengagement Motor. 2. Check the physical position of Disengaging HP Sensor and its flag. 3. Check that the Cable of Disengaging HP Sensor is not open-circuit. 4. Replace the DF Driver PCB.

• Code: E423-0001
• Description: DF Unit SDRAM error (This error occurs on Duplex Color Image Reader Unit-B1 only)
  SDRAM access error
• Remedy: 1. Turn OFF and then ON the power. 2. Check the connection between Reader and Controller, and check that the Cable is not open-circuit. 3. Replace the Reader Controller PCB.

• Code: E423-0002
• Description: DF Unit SDRAM error (This error occurs on Duplex Color Image Reader Unit-B1 only)
  SDRAM Verify error
• Remedy: 1. Turn OFF and then ON the power. 2. Check the connection between Reader and Controller, and check that the Cable is not open-circuit. 3. Replace the Reader Controller PCB.

• Code: E490-0001
• Description: Different DF model
  Installed DF is not the supported DF.
• Remedy: 1. Using the service mode, check if the installed DF model is the same model which was set in the service mode. 2. Check the connection between Reader Controller PCB and DF Driver PCB, and check that the Cable is not open-circuit. 3. Replace the DF Driver PCB. 4. Replace the Reader Controller PCB.