• Code: SC317
• Description: Drum Charge Error: M
  Drum charge output voltage (Vpp) exceeded 2.8 kV.
• Causes: • Check the connections of the charge unit of the PCU where the problem occurred. • Replace the charge unit of the PCU (CBG power pack for the K PCU, charge roller unit for YMC PCUs)

• Code: SC318
• Description: Drum Charge Error: C
  Drum charge output voltage (Vpp) exceeded 2.8 kV.
• Causes: • Check the connections of the charge unit of the PCU where the problem occurred. • Replace the charge unit of the PCU (CBG power pack for the K PCU, charge roller unit for YMC PCUs)

• Code: SC319
• Description: Drum Charge Error: Y
  Drum charge output voltage (Vpp) exceeded 2.8 kV.
• Causes: • Check the connections of the charge unit of the PCU where the problem occurred. • Replace the charge unit of the PCU (CBG power pack for the K PCU, charge roller unit for YMC PCUs)

• Code: SC320
• Description: Development power pack error: K
  This SC is issued if the VBCU detects a short in the development DC charge for K, M, C, Y.
• Causes: • Development power pack defective • High voltage power supply defective • High voltage power supply harness defective • Development unit defective • IOB harness disconnected or defective • IOB defective

• Code: SC321
• Description: Development power pack error: M
  This SC is issued if the VBCU detects a short in the development DC charge for K, M, C, Y.
• Causes: • Development power pack defective • High voltage power supply defective • High voltage power supply harness defective • Development unit defective • IOB harness disconnected or defective • IOB defective

• Code: SC322
• Description: Development power pack error: C
  This SC is issued if the VBCU detects a short in the development DC charge for K, M, C, Y.
• Causes: • Development power pack defective • High voltage power supply defective • High voltage power supply harness defective • Development unit defective • IOB harness disconnected or defective • IOB defective

• Code: SC323
• Description: Development power pack error: Y
  This SC is issued if the VBCU detects a short in the development DC charge for K, M, C, Y.
• Causes: • Development power pack defective • High voltage power supply defective • High voltage power supply harness defective • Development unit defective • IOB harness disconnected or defective • IOB defective

• Code: SC324
• Description: Development motor error: K
  The PLL lock signal remained HIGH or LOW for longer than the prescribed time for the K, M, C, or Y, development motor.
• Causes: • Development motor shaft locked, blocked by obstruction • Development motor defective • DRB defective