• Code: 400
• Description: 1st transfer 400 D (image transfer) electric leakage (+) Image transfer starts. - The process operates at the minimum PWM duty value. The returned current exceeds 1.8 V for 180 milliseconds.
• Causes: • Short circuit in the image transfer unit • Defective image transfer belt • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 401
• Description: 1st transfer (image transfer) electric leakage (.) Image transfer starts. - The negative (.) output is at the maximum PWM duty value for 60 milliseconds.
• Causes: • Short circuit in the image transfer belt • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 410
• Description: 2nd transfer (paper transfer) electric leakage (+) Paper transfer starts. - The positive (+) output is at the minimum PWM duty value. - The returning voltage stays at 2.7 V or more for 60 milliseconds.
• Causes: • Short circuit in the paper transfer unit • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 411
• Description: 2nd transfer (paper transfer) electric leakage (.) Paper transfer starts. - The negative (.) output is at the minimum PWM duty value. - The returning voltage stays at 4.5 V or more for 60 milliseconds.
• Causes: • Short circuit in the paper transfer unit • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 412
• Description: 2nd transfer (paper transfer) disconnection (+) Paper transfer starts. - The positive (+) output is at the maximum PWM duty value for 60 milliseconds.
• Causes: • Right cover not closed • Defective transfer roller contact mechanism • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 413
• Description: 2nd transfer (paper transfer) disconnection (.) Paper transfer starts. - The negative (.) output is at the maximum PWM duty value for 60 milliseconds.
• Causes: • Right cover not closed • Defective transfer roller contact mechanism • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)

• Code: 420
• Description: Discharge error (fusing bias) The discharge circuit is operating at the maximum PWM duty value for 60 milliseconds.
• Causes: • Discharge pin short circuit • Defective high voltage supply board • Defective harness (BCU - high voltage supply board) • Scratched fusing belt

• Code: 421
• Description: Discharge plate error During discharging, the leakage detection signal is low for 60 milliseconds.
• Causes: • Short circuit in the discharge plate • Defective high voltage supply board • Defective harness (BCU - high voltage supply board)