• Code: 555
• Description: Heating roller lamp consecutive full power 2 The heating roller-fusing lamp stays ON for 15 seconds or more while the fusing unit is in the ready condition.
• Causes: • Broken heating roller fusing lamp
• Remedy: • Replace the heating roller fusing lamp. • Replace the PSU.

• 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) • Defective PSU
• Remedy: • Check the power supply source. • Replace the PSU.

• 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 thermistor error The temperature detected by the pressure roller thermistor does not reach 0 °C for 20 seconds.
• Causes: • Loose connection of the pressure roller thermistor • Defective thermopile • Defective pressure roller thermistor
• Remedy: • Check if the pressure roller thermistor is firmly connected. • Replace the thermopile. • Replace the pressure roller thermistor.

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

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

• Code: 565
• Description: Pressure roller fusing lamp consecutive full power When the fusing unit is not running in the ready condition, the pressure roller fusing lamp keeps ON full power for 300 seconds or more.
• Causes: • Broken pressure roller fusing lamp • Defective pressure roller thermistor
• Remedy: • Replace the pressure roller lamp. • Replace the pressure roller thermistor. • Replace the PSU.

• Code: 620
• Description: ARDF communication error After the ARDF is detected, the break signal occurs or communication timeout occurs.
• Causes: • Incorrect installation of ARDF • ARDF defective • IPU defective
• Remedy: • Check the cable connection of the ARDF. • Replace the ARDF. • Replace the IPU.