• Code: 555
• Description: Fusing Heater error: End
  The fusing heater keeps full power for 9 seconds or more.
• Causes: Defective thermistors. Broken heater cables.
• Remedy:

• Code: 557
• Description: Zero cross frequency error
  When the zero cross signal is 66 or more and it is detected 10 times or more in 11 detections, the machine determines that input 60 Hz and SC557 occurs.
• Causes: The frequency of the power supply from the wall socket is unstable. Caused by noise.
• Remedy:

• Code: 559
• Description: Consecutive fusing jam
  The paper jam counter for the fusing unit reaches 3 times. The paper jam counter is cleared if the paper is fed correctly. This SC is activated only when SP1142-001 is set to "1" (default "0").
• Causes: Paper jam in the fusing unit
• Remedy:

• Code: 561
• Description: Pressure roller thermistor error: End
  The temperature at the end of the pressure roller measured by the thermistor does not reach 0°C for 20 seconds.
• Causes: Defective thermopile. Defective thermistor. Loose connection
• Remedy:

• Code: 562-04
• Description: Pressure roller thermistor warm-up error: End
  The fusing sleeve belt rotation sensor does not reach 51°C for 100 seconds after the fusing/paper exit motor has turned on with sheets of 257 mm or more in width.
• Causes: Dirty thermopile lenses. Defective thermistor.
• Remedy:

• Code: 563
• Description: Pressure roller overheat: End (software error)
  The detected pressure roller temperature stays at 230°C or more for 1 second for 10 consecutive times.
• Causes: The triac has shorted out. Defective IOB. Defective BCU.
• Remedy:

• Code: 564
• Description: Pressure roller overheat: End (hardware error)
  The thermistor detects 240°C or more.
• Causes: Defective PSU. Defective BCU. Defective AC control board. Defective IOB. Defective fusing control system.
• Remedy: • Replace the PSU. • Replace the BCU. • Replace the AC controller board. • Replace the IOB. • Replace the fusing unit and reset the counter of the fusing unit using SP3-902-014. Important: • The fusing unit cannot be used because an abnormal high temperature was detected. • After this SC occurs, the counter reset of the fusing unit should be done manually using SP3-902-014 because the counter reset is not done automatically. • After replacing fusing unit, to set SP5-810-2 is necessary to reset this SC.

• Code: 569-00
• Description: Pressure roller contact sensor error
  Pressure roller contact sensor does not detect the pressure roller position three times.
• Causes: Broken or defective pressure roller contact motor. Deformed or broken pressure roller contact sensor feeler. Defective fusing unit.
• Remedy: Turn the main power switch off and on.