• Code: SC310
• Description: Potential sensor error 1
  When calibrating the drum potential sensor at the process control initial setting, the drum potential sensor output voltage is out of specification.
• Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • Development power pack defective

• Code: SC311
• Description: Potential sensor error 2
  When calibrating the drum potential sensor at the process control initial setting, the rate of change of drum potential sensor output with voltage on the drum is out of specification.
• Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • Development power pack defective

• Code: SC312
• Description: Potential sensor error 4
  When adjusting the drum potential (VD) at the process control initial setting, the drum potential sensor detects that VD is more than VG (grid voltage).
• Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • Development power pack defective • Dirty or worn charge corona wire

• Code: SC314
• Description: Potential sensor error 5
  When adjusting the drum potential (VH) for LD power adjustment during the process control initial setting, the first time the VH pattern is made, the drum potential sensor detects that VH is more than 500V.
• Causes: • Potential sensor defective • Poor connection between the potential sensor and the I/O board (IOB) • IOB defective • Poor connection between the drum unit and the I/O board (IOB) • LD unit defective

• Code: SC321
• Description: No laser writing signal (F-GATE) error 1
  The laser writing signal (F-GATE) does not go to LOW for more than 15 seconds after the copy paper reaches the registration sensor.
• Causes: • BICU board defective • Poor connection of the printer controller • Printer controller defective

• Code: SC322
• Description: 1st laser synchronization error
  The 1st laser synchronization signal cannot be detected by the main scan synchronization detector board even if the laser diodes are activated.
• Causes: • Poor connection between the laser synchronization detector board and the LD unit • Laser synchronization detector board out of position • Laser synchronization detector board defective • LD unit defective

• Code: SC323
• Description: LD drive current over
  The LD drive board applies more than 110 mA to the LD.
• Causes: • LD unit defective (not enough power, due to aging) • Poor connection between the LD unit and the BICU board • BICU defective

• Code: SC326
• Description: 2nd laser synchronization error
  The 2nd laser synchronization signal cannot be detected by the main scan synchronization detector board even if the laser diodes are activated.
• Causes: • Poor connection between the laser synchronization detector board and the LD unit • Laser synchronization detector board out of position • Laser synchronization detector board defective • LD unit defective