• Code: E730-D001
• Description: Printer service call
• Causes: Printer communication error (communication error at initial communication and negotiation packet error)
• Remedy: - Turn OFF and then ON the power. - Replace the Main Controller PCB.

• Code: E733-0001
• Description: Printer communication error
• Causes: Printer communication error (Invalid communication after communication is established, Parity error)
• Remedy: • Turn on the power again. • Replace the DC controller PCB.

• Code: E733-0004
• Description: Printer communication error
• Causes: Printer communication error (Undefined command error)
• Remedy: • Turn on the power again. • Replace the DC controller PCB.

• Code: E733-0005
• Description: Printer communication error
• Causes: Printer communication error (Communication timeout error)
• Remedy: • Turn on the power again. • Replace the DC controller PCB.

• Code: E733-0006
• Description: Printer communication error
• Causes: Printer communication error (Unknown communication error)
• Remedy: • Turn on the power again. • Replace the DC controller PCB.

• Code: E740-0002
• Description: Invalid MAC address detection
• Causes: An invalid MAC address was detected.
• Remedy: 1.Check the contents of the MAC address. 2.Write a MAC address. 3.Replace the board.

• Code: E740-0004
• Description: Invalid MAC address detection
• Causes: LAN controller chip access error
• Remedy: 1.Check the area around the LAN chip. 2.Replace the board.

• Code: E744-0800
• Description: MoE748del code mismatch
• Causes: Model code mismatch
• Remedy: Replace Soft-ID PCB.