• Code: SC317
• Description: AC bias charge adjustment error 2: M
  An average value of 8 ms/cycle could not be attained for Vpp (AC charge bias) within 15 attempts. -or- The output of the AC charge boosted Vpp over 2.8 kV.
• Causes: • Charge roller dirty • Charge roller defective • Bias terminal connection at the PCU receptacle is dirty or defective

• Code: SC318
• Description: AC bias charge adjustment error 3: C
  An average value of 8 ms/cycle could not be attained for Vpp (AC charge bias) within 15 attempts. -or- The output of the AC charge boosted Vpp over 2.8 kV.
• Causes: • Charge roller dirty • Charge roller defective • Bias terminal connection at the PCU receptacle is dirty or defective

• Code: SC319
• Description: AC bias charge adjustment error 4: Y
  An average value of 8 ms/cycle could not be attained for Vpp (AC charge bias) within 15 attempts. -or- The output of the AC charge boosted Vpp over 2.8 kV.
• Causes: • Charge roller dirty • Charge roller defective • Bias terminal connection at the PCU receptacle is dirty or defective

• Code: SC320
• Description: Development power pack error 1: K
  An interrupt checks the status of the each power pack every 2 ms. This SC is issued if the BCU detects a short in the development DC charge for black, magenta, cyan, or yellow (or V = 0) for 500 ms (250 times).
• 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 2: M
  An interrupt checks the status of the each power pack every 2 ms. This SC is issued if the BCU detects a short in the development DC charge for black, magenta, cyan, or yellow (or V = 0) for 500 ms (250 times).
• 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 3: C
  An interrupt checks the status of the each power pack every 2 ms. This SC is issued if the BCU detects a short in the development DC charge for black, magenta, cyan, or yellow (or V = 0) for 500 ms (250 times).
• 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 4: Y
  An interrupt checks the status of the each power pack every 2 ms. This SC is issued if the BCU detects a short in the development DC charge for black, magenta, cyan, or yellow (or V = 0) for 500 ms (250 times).
• 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 1: K
  The PLL lock signal remained HIGH or LOW for longer than the prescribed time for the development motor of the affected color.
• Causes: • Development motor shaft locked, blocked by and obstruction • DRB (Drive Board) defective