• Code: E744 1001
• Description: Firmware version error
• Causes: Version of the main program and the version of the start-up program was not matched.
• Remedy: Install the set of the controller firmware.

• 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 the Wireless LAN PCB
• Causes: Unable to communicate with the Wireless LAN.
• Remedy: 1. Turn OFF and then ON the main power. 2. Check the connection of the Wireless LAN. 3. Install the set of the controller firmware. 4. Replace the Main Controller PCB.

• Code: E744 7000
• Description: Main Controller PCB error
• Causes: An error in the microcomputer which retains fax job information of the Main Controller PCB.
• Remedy: 1. Install the firmware of BKUP. 2. Install the set of the controller firmware. 3. Replace the Main Controller PCB.

• Code: E746 0000
• Description: Main Controller PCB error
• Causes: Main Controller communication error occurred (other than scan).
• Remedy: 1. Install the set of the controller firmware. 2. Replace the Main Controller PCB.

• Code: E766 8000
• Description: Digital registration error
• Causes: Information at digital registration could not be obtained.
• Remedy: 1. Install the Engine Controller firmware. 2. Install the set of the controller firmware. 3. Replace the Engine Controller PCB

• Code: E766 9000
• Description: Scanner power state error
• Causes: An error was detected in power state of the Laser Scanner Unit.
• Remedy: 1. Install the set of the controller firmware. 2. Replace the Laser Scanner Unit