• Code: E744-1001
• Description: Firmware version error
  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
  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
  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
  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
  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
  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
  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
  An error was detected in power state of the Laser Scanner Unit.
• Remedy: