• Code: 553
• Description: Heating roller fusing lamp overheat 2 (software error)
  The detected pressure roller temperature stays at 230°C or more for 1 second.
• Causes: • Defective PSU • Defective BCU
• Remedy: 1. Replace the heating roller thermistor (end). 2. Replace the PSU. 3. Replace the BCU.

• Code: 554
• Description: Heating roller fusing lamp overheat 2 (hardware error)
  The heating roller thermistor (end) detects 250°C or more.
• Causes: • Defective heating roller thermistor (end) • Defective PSU • Defective BCU • Defective fusing control system
• Remedy: 1. Replace the heating roller thermistor (end). 2. Replace the PSU. 3. Replace the BCU.

• Code: 555
• Description: Heating roller lamp consecutive full power 2
  When the fusing unit is not running in the ready condition, the pressure roller-fusing lamp keeps ON full power for 8 seconds or more.
• Causes: • Broken heating roller thermostat • Broken heating roller fusing lamp
• Remedy: 1. Replace the heating roller thermostat. 2. Replace the heating roller fusing lamp.

• 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: • Noise (High frequency)
• Remedy: Check the power supply source.

• 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 SP1159-001 is set to "1" (default "0").
• Causes: • Paper jam in the fusing unit.
• Remedy: 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: 561
• Description: Pressure roller thermister error 3
  The temperature measured by the pressure roller thermistor (center) does not reach 0 °C for 20 seconds.
• Causes: • Loose connection of pressure roller thermistor (center) • Defective pressure roller thermistor (center)
• Remedy: 1. Check that the pressure roller thermistor (center)is firmly connected. 2. Replace the pressure roller thermistor (center).

• Code: 563
• Description: Pressure roller overheat 3 (software error)
  The detected fusing roller temperature stays at 230°C or more for 1 second.
• Causes: • Defective PSU • Defective BCU
• Remedy: 1. Replace the pressure roller thermistor (center). 2. Replace the PSU. 3. Replace the BCU.

• Code: 564
• Description: Pressure roller overheat 3 (hardware error)
  The pressure roller thermistor (center) detects 250°C or more.
• Causes: • Defective PSU • Defective BCU • Defective pressure roller thermistor (center) • Defective fusing control system
• Remedy: 1. Replace the pressure roller thermistor (center). 2. Replace the PSU. 3. Replace the BCU.