• Code: 503-02
• Description: Tray 3 error (Paper Feed Unit or LCT)
  • This SC is generated if the following condition occurs 3 consecutive times. For the paper feed unit: When the main switch is turned or when the tray is set and if the upper limit is already detected, the lift motor turns on to lower the bottom plate until the lift sensor goes off. If the motor turns on for 7 seconds or more, the machine asks the user to reset the tray. For the LCT: When the main switch is turned on or when the LCT is set, if the end fence is not in the home position (home position sensor ON), the tray lift motor stops.
• Causes: For the paper feed unit: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection For the LCT: • Defective stack transport clutch or connector disconnection • Defective tray motor or connector disconnection • Defective end fence home position sensor or connector disconnection

• Code: 504-01
• Description: Tray 4 error (3 Tray Paper Feed Unit)
  When the tray lift motor is turned on, (if the upper limit is not detected within 18 seconds), the machine asks the user to reset the tray. If this condition occurs three consecutive times, the SC is generated.
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection

• Code: 504-02
• Description: Tray 4 error (3 Tray Paper Feed Unit)
  When the main switch is turned or when the tray is set and if the upper limit is already detected, the lift motor turns on to lower the bottom plate until the lift sensor goes off. If the motor turns on for 7 seconds or more, the machine asks the user to reset the tray. If this condition occurs 3 consecutive times, this SC is generated.
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection

• Code: 530
• Description: Fusing fan motor error
  The BCU does not receive the lock signal (CN210-B5) 5 seconds after turning on the fusing fan.
• Causes: • Defective fusing fan motor or connector disconnection • Defective BCU

• Code: 541
• Description: Heating roller thermistor error
  The temperature measured by the heating roller thermistor does not reach 7 °C for ten seconds.
• Causes: • Loose connection of the heating roller thermistor • Defective heating roller thermistor • Defective BCU

• Code: 542
• Description: Heating roller warm-up error
  When the fusing unit is not running after the main switch has been turned on or recovering, the increment of the heating roller temperature per three seconds is 17°C or less. If this condition is detected five times consecutively, SC 542 is defined. The heating roller temperature does not reach the ready temperature while 150 seconds after the heating lamp has been turned on.
• Causes: • Heating roller fusing lamp broken • Defective heating roller thermistor • Defective BCU

• Code: 543
• Description: Heating roller fusing lamp overheat
  The detected fusing temperature stays at 250°C or more for 2 seconds.
• Causes: • Defective PSU • Defective BCU

• Code: 544
• Description: Heating roller fusing lamp high temperature error
  During stand-by mode or a print job, the detected heating roller temperature stays at 230 °C or more for 0.2 second.
• Causes: • Defective heating roller thermistor • Defective PSU • Defective BCU