• Code: E355-0005
• Description: System error
• Causes: System error
• Remedy: Contact the sales company.

• Code: E719-0000
• Description: Card Reader communication error (serial communication)
• Causes: Communication with the Card Reader could not be started at startup.
• Remedy: 1. After tuning OFF the power, check the connection of the Card Reader-F1 and the short connector [A], and turn ON the power. 2. After turning OFF the power, replace the cable included in the package of the Card Reader-F1 or the Copy Card Reader Attachment- J1, and turn ON the power.

• Code: E732-0000
• Description: Scanner communication error
• Causes: Scanner communication error
• Remedy: 1. Install the set of the controller firmware. 2. Replace the Main Controller PCB.

• Code: E733-0000
• Description: Printer communication error
• Causes: Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
• Remedy: 1. Check the connector connection between the Engine Controller PCB and the Main Controller PCB. 2. Install the set of the controller firmware. 3. Replace the Main Controller PCB. 4. Replace the Engine Controller PCB.

• Code: E736-0001
• Description: Error in ROM for backing up fax data
• Causes: An error occurred in ROM for backing up fax data
• Remedy: 1. Install the set of the controller firmware. 2. Replace the NCU PCB. 3. Replace the Main Controller PCB.

• Code: E744-4000
• Description: Engine ID error
• Causes: Invalid engine connection was detected.
• Remedy: 1. Turn OFF and then ON the main power. 2. Check the Engine Controller PCB. 3. Install the Engine Controller PCB. 4. Install the set of the controller firmware. 5. Check the model code. (When the model code and the engine code are mismatched, E744-4000 occurs.)

• Code: E744-5000
• Description: Error in the Control Panel PCB
• Causes: Error in the Control Panel PCB (microcomputer)
• Remedy: 1. Check the Control Panel PCB, and install the firmware (PANEL). 2. Install the set of the controller firmware. 3. Replace the Main Controller PCB.

• Code: E744-6000
• Description: Communication error with Wireless LAN PCB
• Causes: Communication with the Wireless LAN PCB could not be established.
• Remedy: 1. Turn OFF and then ON the main power. 2. Check the connection of the Wireless LAN PCB. 3. Install the set of the controller firmware. 4. Replace the Wireless LAN PCB. 5. Replace the Main Controller PCB.