• Code: 553
• Description: Fusing thermistor error 3
  The end thermistor (contact type) was at 240°C (464°F) for more than 1 second. The temperature is read 10 times every sec. (at 0.1 sec. intervals).
• Causes: • PSU defective
  • IOB control board defective
  • BICU control board defective

• Code: 555
• Description: Fusing lamp error
  After the start of the warmup cycle, a fusing lamp was at full power for 1.8 seconds but the hot roller did not turn.
• Causes: • Thermistor bent, out of position
  • Fusing lamp disconnected
  • Circuit breaker opened

• Code: 557
• Description: Zero cross signal error
  High frequency noise was detected on the power line.
• Causes: • No action required. The SC code is logged and the operation of the machine is not affected.

• Code: 559
• Description: Fusing jam: 3 counts
  At the fusing exit sensor the paper was detected late for three pulse counts (lag error), and SP1159 was on.
• Causes: This SC only occurs if SP1159 is on, and a jam occurred in the fusing unit for three consecutive sheets of paper. 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: 569
• Description: Fusing pressure release motor error
  During copying, the HP sensor could not detect the actuator, tried again 3 times and could not detect.
• Causes: • Motor lock because of too much load
  • Motor driver defective
  • HP sensor defective, disconnected, connector defective, harness damaged

• Code: 590
• Description: Toner collection motor error
  The toner collection motor sensor output does not change for 3 seconds while the toner collection motor is on.
• Causes: • Motor lock due to obstruction
  • Motor driver board defective
  • Motor connection loose, defective
  • Toner collection motor sensor disconnected, sensor defective
  • Rotational transmission shaft (o6 x 30) missing

• Code: 599
• Description: 1-bin Exit Motor Error (Japan Only)
  The transport lock sensor output does not change within 300 ms after the motor switches on.
• Causes: • Motor overload
  • Motor driver defective

• Code: 610
• Description: BICU - ADF communication/timeout abnormal
  After 1 data frame is sent to the ADF, an ACK signal is not received within 100 ms, and is not received after 3 retries.
• Causes: • Serial line connection unstable
  • External noise on the line