• Code: E-0080
• Description: Density Sensor Error
  Density Sensor cannot be calibrated correctly before Density Measure.
• Remedy: Wires 1 Is the wire between Toner Density Sensor and PW11720 PCB connected properly? No Connect it properly. Density Sensor (PH8) 2 Can you fix the problem if you replace Density Sensor? No Replace PW11720 with a new one.

• Code: E-0081
• Description: Density Sensor Error
  Density Sensor cannot be calibrated correctly before Density Measure.
• Remedy: Wires 1 Is the wire between Toner Density Sensor and PW11720 PCB connected properly? No Connect it properly. Density Sensor (PH8) 2 Can you fix the problem if you replace Density Sensor? No Replace PW11720 with a new one.

• Code: E-0090
• Description: Eraser Lamp Error
  1. The connector J-227 / J-228 is not connected.
  2. Eraser Lamp (PW6631) is broken.
• Remedy: Wires 1 Is the wire between Toner Density Sensor and PW11720 PCB connected properly? Is the spring on the left bottom of the Process Unit OK? No Connect it properly. Eraser Lamp 2 Can you fix the problem if you replace the Process Unit? No Replace PW11720 with a new one.