• Code: SC302
• Description: High voltage power supply error -Definition- [B] A charge roller current leak signal is detected. A transfer roller current leak signal is detected. A separation bias leak signal is detected. A development bias leak signal is detected.
• Causes: · Charge roller damaged · Transfer roller damaged · Discharge brush defective · High voltage supply board defective · Poor PCU connection

• Code: SC306
• Description: Charge roller home position error -Definition- [B] The charge roller H. P. sensor does not detect the on condition.
• Causes: · Charge roller H. P. sensor defective · Charge roller contact clutch defective

• Code: SC320
• Description: Polygon mirror motor error -Definition- [B] The polygon mirror motor does not reach its operating speed within 10 seconds after the polygon mirror motor on signal, or the lock signal is not detected for more than 10 seconds continuously during operation.
• Causes: · Polygon mirror motor defective · Poor connection between the polygon mirror motor driver and the BECU board · BECU board defective

• Code: SC322
• Description: Laser synchronization error -Definition- [B] The laser synchronization signal cannot be detected by the main scan synchronization detector board for more than 5 consecutive 100 ms intervals.
• Causes: · Poor connection of the optical fiber cable which connects the laser synchronization detector board and the BECU board · Laser synchronization detector out of position · Laser synchronization detector defective · BECU board defective

• Code: SC324
• Description: LD drive current over -Definition- [B] The LD drive board applies more than 100 mA to the LD.
• Causes: · LD unit defective (not enough power, due to aging) · Poor connection of the interface harness which connects the LD unit and the BECU board · Temperature around the LD unit is too high

• Code: SC390
• Description: TD sensor error -Definition- [B] The TD sensor outputs less than 0.5 V, 20 s after the TD sensor initial setting has been performed. TD sensor output voltage falls out of the adjustment range (2.0 ± 0.2 V) after the TD sensor initial setting has been finished. A development bias leak signal is detected.
• Causes: · TD sensor abnormal · Poor connection of the PCU · High voltage supply board defective

• Code: SC500
• Description: Main motor error -Definition- [B] A main motor lock signal is detected for more than 5 seconds or the lock signal is not detected for more than 500 ms during rotation.
• Causes: · Too much load on the drive mechanism · Main motor defective

• Code: SC503
• Description: Tray 3 lift motor error (optional paper tray unit only) -Definition- [C] The paper upper limit sensor is not activated after the tray lift motor has been on for 13 seconds.
• Causes: · Upper limit sensor defective · Tray lift motor defective · BECU board defective