• Code: EE-EL
• Description: Automatic toner density adjustment error (Over toner)
• Causes: Toner density sensor trouble. Charging voltage/ developing voltage trouble, toner density trouble, or developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.

• Code: EE-EU
• Description: Automatic toner density adjustment error (Under toner)
• Causes: Toner density sensor trouble. Charging voltage/ developing voltage trouble, toner density trouble, or developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.

• Code: F1-00
• Description: Finisher - PCU PWB communication error
• Causes: Connection trouble of the connector and the harness between the finisher and the PCU PWB. Finisher control PWB trouble. PCU PWB trouble. Strong external noises.
• Remedy: Check the connector and the harness between the finisher and the PCU PWB. Replace the finisher control PWB. Replace the PCU PWB.

• Code: F1-03
• Description: Finisher paper exit roller lifting operation trouble
• Causes: Finisher paper exit roller lift motor trouble. Harness and connector connection trouble. Home position sensor trouble. Finisher control PWB trouble.
• Remedy: Use SIM3-3 to check the operation of the paper exit roller lift motor. Replace the paper exit roller lift motor. Check connection of the connector and the harness. Replace the home position sensor. Replace the finisher control PWB.

• Code: F1-10
• Description: Staple operation trouble
• Causes: Staple motor trouble. Finisher control PWB trouble. Home position sensor trouble.
• Remedy: Use SIM3-3 to check the operation of the staple motor. Replace the staple motor. Check connection of the connector and the harness. Replace the home position sensor. Replace the finisher control PWB.

• Code: F1-15
• Description: Finisher paper exit tray lift operation trouble
• Causes: Paper exit tray lift motor trouble. Finisher control PWB trouble.
• Remedy: Use SIM3-3 to check the operation of the paper exit tray lift motor. Replace the finisher control PWB. Replace the paper exit tray lift motor.

• Code: F1-19
• Description: Finisher alignment operation trouble F
• Causes: Finisher paper alignment motor lock. Motor speed abnormality. Over-current to the motor. Finisher control PWB trouble.
• Remedy: Use SIM3-3 to check the operation of the paper alignment motor F. Replace the finisher control PWB. Replace the paper alignment motor F.

• Code: F1-20
• Description: Finisher alignment operation trouble R
• Causes: Finisher paper alignment motor lock. Motor speed abnormality. Over-current to the motor. Finisher control PWB trouble.
• Remedy: Use SIM3-3 to check the operation of the paper alignment motor R. Replace the finisher control PWB. Replace the paper alignment motor R.