• Code: 557
• Description: Zero Cross Frequency Error
  The detection error occurs ten times consecutively in ten zero cross signal detections. This error is defined when the detected zero cross signal is 17 or less/27 or more for 0.2 seconds.
• Causes: Defective fusing lamp relay. Unstable input power source.
• Remedy: 1. Check the power supply source. 2. Replace the fusing unit. • Execute "Engine Maintenance Menu" to recover the printer after completing the recovery procedure. Otherwise, the printer continues to issue this SC code and cannot be operated.

• Code: 559
• Description: Consecutive Fusing Jam
  The paper jam counter for the fusing unit reaches 3. The paper jam counter is cleared if the paper is fed correctly. This SC is activated only when this function is enabled with "Engine Maintenance" (default "OFF").
• Causes: Defective fusing unit. Defective fusing control.
• Remedy: 1. Clear this SC to send a command after a jam removal. 2. Turn off this function after a jam removal. • Execute "Engine Maintenance Menu" to recover the printer after completing the recovery procedure. Otherwise, the printer continues to issue this SC code and cannot be operated.

• Code: 669
• Description: EEPROM Error
  An unexpected value exists in the initialization flag of the EEPROM.
• Causes: EEPROM not initialized. Defective EEPROM.
• Remedy: 1. Initialize the EEPROM. 2. Replace the EEPROM. 3. Replace the EGB.

• Code: 690
• Description: GAVD Communication Error
  The ID of the GAVD is not identified during initialization.
• Causes: Defective EGB
• Remedy: 1. Replace the EGB.

• Code: 819
• Description: Service Cycle Power
  Incorrect combination of EGB and controller board. An unexpected error occurs in the EEPROM on the controller board
• Causes: Controller board defective
• Remedy: 1. Install the correct EGB and controller boards for this printer. 2. Replace the controller board

• Code: 823
• Description: USB/ Network Device Error
  An interface error in the USB connection or NIB connection occurs.
• Causes: Controller board detective
• Remedy: 1. Replace the controller board.

• Code: 824
• Description: EEPROM Error
  An EEPROM check error at power-on occurs.
• Causes: Controller board detective
• Remedy: 1. Replace the controller board.

• Code: 827
• Description: On-Board Memory Check Error
  An on-board memory check error at power-on occurs.
• Causes: Controller board detective
• Remedy: 1. Replace the controller board.