• Code: E733-0006
• Description: Printer communication error
• Causes: Printer communication error (unknown communication error)
• Remedy: - Turn OFF and then ON the power. - Replace the Engine Controller PCB.

• Code: E740-0002
• Description: Invalid MAC address detection
• Causes: Invalid MAC address detection
• Remedy:

• Code: E740-0004
• Description: Invalid MAC address detection
• Causes: LAN Controller Chip access error
• Remedy:

• Code: E740-0800
• Description: Invalid MAC address detection
• Causes: Model code mismatch
• Remedy:

• Code: E740-0900
• Description: Invalid MAC address detection
• Causes: Mismatch of the model of firmware sent when downloading
• Remedy:

• Code: E740-1100
• Description: Invalid MAC address detection
• Causes: Detection of falsification of the Controller Board
• Remedy:

• Code: E747-0000
• Description: EEPROM error
• Causes: EEPROM error Cause Failure in main controller PCB
• Remedy: - Replace the main controller PCB

• Code: E748-2012
• Description: Failed to rewrite due to no more alternative block of Flash ROM (NAND) available.
• Causes:
• Remedy: