• Code: SC545
• Description: Fusing Overheat Error 3: Continuous Lamp On
  After warm-up and while the hot roller is not rotating, the fusing lamps remain on at full power for 45 s (B234/B235) 90 s (B236).
• Causes: • Fusing thermistor out of position
  • One or more fusing lamp is disconnected

• Code: SC547
• Description: Zero-Cross Signal Not Detected
  The applied bandwidth is detected above 66 Hz or below 45 Hz, and no zero-cross signal detected for 5 s with the power relay ON.
• Causes: • Noise on the ac power line
  • Cycle the machine off/on
  • If the problem continues, install a noise filter

• Code: SC557
• Description: Zero-Cross Signal Over
  Noise was detected on the power supply line.
• Causes: • Cycle the machine off/on
  • If the problem continues, install a noise filter

• Code: SC559
• Description: Fusing Unit Jam Error
  The paper cooling job time sensor detected paper late for 3 counts. This SC only occurs if SP1159 is on, and a jam occurred in the fusing unit for three consecutive sheets of paper.
• Causes: • Remove the paper that is jammed in the fusing unit. Then make sure that the fusing unit is clean and has no obstacles in the paper feed path.

• Code: SC585
• Description: Double-Feed LED Adjustment Error
  The calibration of the double-feed LED for the paper type failed reach the target voltage. The print job completed without the double-feed detection operating. The target voltages are: • Normal paper 3.0V±1% • Translucent paper: 3.8V±2% • OHP: 4.0V±2%
• Causes: • Double-feed sensor/LED dirty
  • Sensor/LED connector loose, broken, defective

• Code: SC592
• Description: Toner Bank Motor Error
  An abnormal signal was received from the toner bank motor.
• Causes: • Toner bank motor defective
  • Bank motor connector loose
  • Mechanical overload on the drive mechanism

• Code: SC593
• Description: Toner Suction Motor Replace Alert
  The total operation time of the motor exceeded 600 hours. Note: A near-end message appears on the operation panel when the service life of the motor exceeds 570 hours.
• Causes: • The toner suction motor has reached the end of its service life.

• Code: SC601
• Description: Communication Error Between BCU and MCU
  One or more of the following occurred:
  • The BCU cannot communicate with the MCU within 100 ms after power on after 3 tries.
  • A BREAK signal was detected after connection between the BCU and MCU.
  • After a communication error, three tries to communicate with the MCU failed.
• Causes: • Poor connection between BCU and MCU
  • BCU defective
  • MCU defective