• Code: SC310
• Description: Drum Potential Sensor Error 1
  During drum potential sensor calibration, the output voltages from the drum potential sensor are not within specifications while .200V then .700V are applied to the drum. NOTE: After this SC is issued, the grid voltage changes to the value set with SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to the value set with SP2103 (LD Power Adjustment).
• Causes: • Drum potential sensor defective • Poor connection between the drum potential sensor and the BCU • Drum potential sensor defective • IOB defective • Poor drum ground connection • CBG power pack defective

• Code: SC311
• Description: Drum Potential Sensor Error 2
  When calibrating the drum potential sensor during process control initialization, the rate of change of drum potential sensor output with voltage on the drum is out of specification. NOTE: After this SC is issued, the grid voltage changes to the value set with SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to the value set with SP2103 (LD Power Adjustment).
• Causes: • Drum potential sensor defective • Poor connection between the drum potential sensor and the BCU • Drum potential sensor defective • IOB defective • Poor drum ground connection • CBG power pack defective

• Code: SC312
• Description: Drum Potential Sensor Error 3 (Vd Abnormal)
  When Vd on the surface of the unexposed drum is adjusted during process control initialization, -900 V is applied to the charge grid but Vd is more than -900. NOTE: After this SC is issued, the grid voltage changes to the value set with SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to the value set with SP2103 (LD Power Adjustment).
• Causes: • Drum potential sensor defective • Poor drum potential sensor harness connection • Drum potential sensor connector defective • IOB defective • Poor drum ground connection • Drum disconnected • Quenching lamp defective • CBG power pack defective • Charge corona wire dirty or defective

• Code: SC313
• Description: Drum Potential Sensor Error 4 (Vd > Vg)
  When adjusting the drum potential (Vd) during process control initialization, the drum potential sensor detects that Vd is more than Vg (grid voltage). NOTE: After this SC is issued, the grid voltage changes to the value set with SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to the value set with SP2103 (LD Power Adjustment).
• Causes: • Drum potential sensor defective • Drum potential sensor harness defective • Drum potential sensor connector defective • IOB defective • Poor contact at the drum connection • CBG power pack defective • Charge corona wire dirty or defective

• Code: SC314
• Description: Drum Potential Sensor Error 5 (Vh Abnormal)
  When adjusting the drum potential (Vh) for LD power adjustment during process control initial setting, the first time the Vh pattern is made, the drum potential sensor detects that Vh is more than 600 V. NOTE: After this SC is issued, the grid voltage changes to the value set with SP2001-001 (Charge Corona Bias Adjustment) and LD power changes to the value set with SP2103 (LD Power Adjustment).
• Causes: • Drum worn • Drum potential sensor defective • Poor drum potential sensor connection • Drum potential sensor connector defective • LD unit requires cleaning • IOB defective • Drum unit connector defective • LDB board defective

• Code: SC315
• Description: Drum Potential Sensor Error 6 (Vd Abnormal)
  When adjusting Vd for the unexposed drum during process control initialization, Vd does not reach the voltage set for SP2001 007 ± 20 V even if Vg has been adjusted 5 times. SP2001 007 (Charge Corona Bias Adjustment . Vd) adjusts the target Vd voltage for process control. Range/Default/Step: [700~1000 / 800 / 5 V]. NOTE: If the Vd adjustment fails, the machine uses the charge grid voltage Vg for the previous adjustment. In this condition, normal ID sensor pattern detection is done.
• Causes: • Drum potential sensor defective • Drum potential sensor harness defective • Drum potential sensor connector defective • IOB defective • Drum unit connector defective • CBG power pack defective

• Code: SC316
• Description: Drum Potential Sensor Error 7 (Vh abnormal)
  One of the following occurred: • When adjusting the drum potential (Vh) for the process control initial setting, the drum potential sensor detects Vh is not within the range .260 + .Vlref +- 20V. In this case, the auto process control value is used. • During retries for LD power modulation to adjust the amount of light, the adjustment was out of range (-70 to +185). In this case, the value of the setting is used.
• Causes: • Drum potential sensor defective • IOB defective • Drum unit connector defective • LDB board defective • Poor drum ground connection • Drum worn • Laser optics need cleaning

• Code: SC317
• Description: Drum Potential Sensor Error 8
  At auto process control initialization, the VL detected after creation of the ID sensor pattern is greater than 300. Possible Causes • Drum worn • LD unit dirty • Poor drum ground connection
• Causes: • Drum worn • LD unit dirty • Poor drum ground connection