• Code: E733 0000
• Description: Printer communication error
• Causes: Communication error occurred after normal startup.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB.

• Code: E744 0001
• Description: Invalid combination of language file versions
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 0002
• Description: Language file error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 1001
• Description: Version mismatch
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 4000
• Description: Detection of firmware of another model
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 5000
• Description: Panel microcomputer error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 6000
• Description: Error in communication with the Wireless LAN Board
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: 1. Check the connection of the Wireless LAN Board. 2. Install the firmware according to the model 3. Replace the Main Controller PCB.

• Code: E744 7000
• Description: Backup microcomputer error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: 1. Install the firmware according to the model 2. Replace the Main Controller PCB.