Canon LBP253x

• Code: E744 4000
• Description: Detection of firmware of another model
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 5000
• Description: Panel microcomputer error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: Install the firmware according to the model

• Code: E744 6000
• Description: Error in communication with the Wireless LAN Board
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: 1. Check the connection of the Wireless LAN Board. 2. Install the firmware according to the model 3. Replace the Main Controller PCB.

• Code: E744 7000
• Description: Backup microcomputer error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: 1. Install the firmware according to the model 2. Replace the Main Controller PCB.

• Code: E746 0000
• Description: Main Controller PCB error
• Causes: Microcomputer error
• Remedy: Install the firmware according to the model Replace the Main Controller PCB.

• Code: E748 2012
• Description: System error
• Causes: System error
• Remedy: Contact the service company office