• Code: SC434
• Description: Potential sensor error 3: Vr C
  Vr > 200V The residual voltage (Vr), the amount of voltage that remains on the surface of the drum after the QL fires is greater than 200V.
• Causes: • Toner density low

• Code: SC435
• Description: Potential sensor error 4: Vr Y
  Vr > 200V The residual voltage (Vr), the amount of voltage that remains on the surface of the drum after the QL fires is greater than 200V.
• Causes: • Toner density low

• Code: SC436
• Description: Potential sensor error 5: Vd K
  The VdHome reading, the first step of the process control self-check, detected that the development potential of the unexposed areas of the drum are not within the prescribed range (-500 to -700)
• Causes: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective

• Code: SC437
• Description: Potential sensor error 6: Vd M
  The VdHome reading, the first step of the process control self-check, detected that the development potential of the unexposed areas of the drum are not within the prescribed range (-500 to -700)
• Causes: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective

• Code: SC438
• Description: Potential sensor error 7: Vd C
  The VdHome reading, the first step of the process control self-check, detected that the development potential of the unexposed areas of the drum are not within the prescribed range (-500 to -700)
• Causes: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective

• Code: SC439
• Description: Potential sensor error 8: Vd Y
  The VdHome reading, the first step of the process control self-check, detected that the development potential of the unexposed areas of the drum are not within the prescribed range (-500 to -700)
• Causes: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective

• Code: SC440
• Description: Image transfer power pack error 1: K
  An interrupt checks the status of the power pack every 2 ms. This SCis issued if the BCU detects a short in the power pack for K, M, C, or Y 250 times within 500 ms.
• Causes: • Transfer belt damaged, insulation damaged • Insulation on high voltage cable damaged • Another hot point inside the machine has damaged insulation • Insulation around high-voltage power supply damaged • IOB damaged

• Code: SC441
• Description: Image transfer power pack error 2: M
  An interrupt checks the status of the power pack every 2 ms. This SCis issued if the BCU detects a short in the power pack for K, M, C, or Y 250 times within 500 ms.
• Causes: • Transfer belt damaged, insulation damaged • Insulation on high voltage cable damaged • Another hot point inside the machine has damaged insulation • Insulation around high-voltage power supply damaged • IOB damaged