• Code: SC553
• Description: Pressure roller fusing lamp overheat The detected pressure roller temperature stays at 200°C or more for five seconds.
• Causes: • Defective PSU • Defective BCU
• Remedy: 1. Replace the fusing unit. 2. Replace the PSU. 3. Replace the BCU.

• Code: SC554
• Description: Pressure roller fusing lamp low temperature error During stand-by mode or printing, the detected pressure roller temperature stays at 50°C or less for five seconds.
• Causes: • Loose connection between the fusing unit and the machine • Defective pressure roller thermistor • Defective PSU • Defective BCU
• Remedy: 1. Check the connection between the fusing unit and main frame. 2. Replace the fusing unit. 3. Replace the PSU. 4. Replace the BCU.

• Code: SC555
• 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 with full power for 100 consecutive seconds.
• Causes: • Pressure roller thermistor out of position
• Remedy: 1. Replace the fusing unit.

• Code: SC556
• Description: Pressure roller fusing lamp temperature fluctuation The pressure roller temperature changes by ±20°C or more in one second. This occurs three times in one minute or two consecutive times.
• Causes: • Loose connection of the pressure roller thermistor • Loose connection between the fusing unit and main frame
• Remedy: 1. Check if the fusing unit is properly set and connected to the main frame. 2. Check if the pressure roller thermistor connector is firmly connected. 3. Replace the fusing unit.

• Code: SC560
• Description: Zero cross error When the main switch is turned on, the machine checks how many zero-cross signals are generated during 500 ms. If the number of zero-cross signal generated is either more than 66 or less than 45 and when this condition is detected 10 consecutive times, this code is displayed.
• Causes: • Electrical noise in the supply from the power cord
• Remedy: 1. Replace the PSU.

• Code: SC621
• Description: Finisher/mailb ox communicatio n error While the BCU communicates with an optional unit, an SC code is displayed if one of following conditions occurs. 1. The BCU receives a signal which is generated by the peripherals only just after the main switch is turned on. 2. When the BCU does not receive an OK signal from a peripheral 100ms after sending a command to it. The BCU resends the command. The BCU does not receive an OK signal after sending the command 3 times.
• Causes: • Cable problems • BCU problems • PSU problems in the machine • Main board problems in the peripherals
• Remedy: 1. Turn the main switch off and on. 2. Check if the cables of peripherals are properly connected. 3. Replace the PSU if no power is supplied to peripherals. 4. Replace the BCU or main board of peripherals.

• Code: SC622
• Description: Bank communicatio n error While the BCU communicates with an optional unit, an SC code is displayed if one of following conditions occurs. 1. The BCU receives a signal which is generated by the peripherals only just after the main switch is turned on. 2. When the BCU does not receive an OK signal from a peripheral 100ms after sending a command to it. The BCU resends the command. The BCU does not receive an OK signal after sending the command 3 times.
• Causes: • Cable problems • BCU problems • PSU problems in the machine • Main board problems in the peripherals
• Remedy: 1. Turn the main switch off and on. 2. Check if the cables of peripherals are properly connected. 3. Replace the PSU if no power is supplied to peripherals. 4. Replace the BCU or main board of peripherals.

• Code: SC623
• Description: Duplex unit communicatio n error While the BCU communicates with an optional unit, an SC code is displayed if one of following conditions occurs. 1. The BCU receives a signal which is generated by the peripherals only just after the main switch is turned on. 2. When the BCU does not receive an OK signal from a peripheral 100ms after sending a command to it. The BCU resends the command. The BCU does not receive an OK signal after sending the command 3 times.
• Causes: • Cable problems • BCU problems • PSU problems in the machine • Duplex control board problem
• Remedy: 1. Turn the main switch off and on. 2. Check if the cable of the duplex inverter unit is properly connected. 3. Replace the PSU if no power is supplied to the peripherals. 4. Replace the duplex control board in the inverter unit.