• Code: 301
• Description: Charge corona unit disconnection
  The supply to the charge corona unit is continuously output. → The unit operates at the maximum PWM duty value for 60 milliseconds
• Causes: • Defective PCU installation (OPC belt) • Defective high voltage supply board • Defective harness (BICU -high voltage supply board)

• Code: 302
• Description: Charge grid electrical leak
  The supply to the charge grid is continuously output. → The returning voltage exceeds the target by 0.5 Volt or more for 120 milliseconds.
• Causes: • Defective PCU installation (OPC belt) • Short circuit in the charge grid • Defective high voltage supply board • Defective harness (BICU -high voltage supply board)

• Code: 305
• Description: Charge corona unit cleaner error
  • Cleaning starts. → The lock signal is not detected within 30 seconds. • Cleaning starts. → The cleaner starts to turn. → The lock signal is detected within 6 seconds. • The lock signal is detected while the unit is moving away from the home position. → The next lock signal is detected within 6 seconds after the unit has turned toward the home position.
• Causes: • Defective PCU installation (OPC belt) • Defective cleaner • Incorrect charge corona unit installation • Toner fallen into the cleaner drive mechanism

• Code: 350
• Description: Development error 1 (K/Y)
  A development process starts. → The returning voltage exceeds the target by 0.5 Volt or more for 60 milliseconds.
• Causes: • Short circuit in the development unit • Defective high voltage supply board • Defective harness (BICU -high voltage supply board)

• Code: 351
• Description: Development error 2 (C/M)
  A development process starts. → The returning voltage exceeds the target by 0.5 Volt or more for 60 milliseconds.
• Causes: • Short circuit in the development unit • Defective high voltage supply board • Defective harness (BICU -high voltage supply board)

• Code: 352
• Description: Development motor error
  • The development motor starts or changes speed. → The motor does not detect a 1-second lock signal within 3 seconds. • The development motor starts. → The lock signal is detected during normal operation. → The lock signal is interrupted for 1 second or more.
• Causes: • Defective development motor

• Code: 400
• Description: 1st transfer (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 (BICU -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 (BICU -high voltage supply board)