• Code: E733-0001
• Description: Printer communication error
  Communication error between the Engine Controller PCB and the Main Controller PCB occurred.?
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB. 3. Replace the Engine Controller PCB.

• Code: E733-0004
• Description: Printer communication error
  Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB. 3. Replace the Engine Controller PCB.

• Code: E733-0005
• Description: Printer communication error
  Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB. 3. Replace the Engine Controller PCB.

• Code: E733-0006
• Description: Printer communication error
  Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB. 3. Replace the Engine Controller PCB.

• Code: E733-0007
• Description: Printer communication error
  ?Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB. 3. Replace the Engine Controller PCB.

• Code: E743-0000
• Description: Error in main controller communication
  An error in reading of/writing to the Flash ROM in the Main Controller occurred.
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB.

• Code: E744-4000
• Description: Engine ID error
  Invalid engine connection was detected.
• Remedy: 1. Turn OFF and then ON the main power. 2. Check if the installed Engine Controller PCB is for this model. 3. Replace the Engine 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. Replace the Wireless LAN PCB. 4. Replace the Main Controller PCB.