Causes: The size of the language file exceeded the allowed size.
Remedy: 1. Update the set of controller firmware.
Code: E744-1001
Description: Version mismatch between BOOTABLE and BOOTROM
Causes: Version of the main program and that of the start-up program were not matched.
Remedy: 1. Update the set of controller firmware.
Code: E744-4000
Description: Engine ID error
Causes: An invalid engine connection was detected.
Remedy: 1. Check the version of D-CON. 2. Update the D-CON. 3. Update the set of controller firmware. 4. Check the model code. (E744-4000 occurs also when the model code and the engine code are mismatched.)
Code: E744-5000
Description: Panel microcomputer error
Causes: Error in the Control Panel PCB (microcomputer).
Remedy: 1. Check the harness/connector connection between the panel microcomputer and Main Controller PCB. 2. Update the set of panel microcomputer. 3. Update the set of controller firmware. 4. Replace the Main Controller PCB.
Code: E744-6000
Description: Error in communication with the Wireless LAN Board
Causes: Unable to communicate with the Wireless LAN PCB.
Remedy: 1. Check the connection of the wireless LAN slot (SD-IO). 2. Update the set of controller firmware. 3. Replace the Main Controller PCB.
Code: E744-7000
Description: Backup microcomputer error
Causes: An error in the microcomputer which retains fax job information of the Main Controller PCB.
Remedy: 1. Check the version of backup microcomputer, and upgrade the version. 2. Update the set of backup microcomputer. 3. Update the set of controller firmware. 4. Replace the Main Controller PCB.