• Code: SC423
• Description: Potential sensor error: Vd Adjustment C
  The development potential of the drum before exposure (Vd) cannot be adjusted to within +-8 V of the target voltage (-900V).
• Causes: • Drum potential sensor harness, connector is loose, broken, defective • Drum potential sensor dirty • Drum potential sensor defective • Drum connector, harness loose, broken, defective • Development power pack defective • VBCU defective

• Code: SC423
• Description: Potential sensor error: Vd Adjustment Y
  The development potential of the drum before exposure (Vd) cannot be adjusted to within +-8 V of the target voltage (-900V).
• Causes: • Drum potential sensor harness, connector is loose, broken, defective • Drum potential sensor dirty • Drum potential sensor defective • Drum connector, harness loose, broken, defective • Development power pack defective • VBCU defective

• Code: SC424
• Description: Potential sensor error 5: Vl adjustment K
  Vpl could not be adjusted to within +-5V of the target Vpl after exposure of the ID sensor patterns.
• Causes: • Drum worn • LD unit dirty • Poor drum ground connection

• Code: SC425
• Description: Potential sensor error 6: Vl adjustment M
  Vpl could not be adjusted to within +-5V of the target Vpl after exposure of the ID sensor patterns.
• Causes: • Drum worn • LD unit dirty • Poor drum ground connection

• Code: SC426
• Description: Potential sensor error 7: Vl adjustment C
  Vpl could not be adjusted to within +-5V of the target Vpl after exposure of the ID sensor patterns.
• Causes: • Drum worn • LD unit dirty • Poor drum ground connection

• Code: SC427
• Description: Potential sensor error 8: Vl adjustment Y
  Vpl could not be adjusted to within +-5V of the target Vpl after exposure of the ID sensor patterns.
• Causes: • Drum worn • LD unit dirty • Poor drum ground connection

• Code: SC432
• Description: Potential sensor error 1: Vr K
  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: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective

• Code: SC433
• Description: Potential sensor error 2: Vr M
  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: • Potential sensor dirty • Potential sensor defective • Charge roller defective • Charge power pack defective • OPC defective