• Code: E9
• Description: Main PCB error.
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: EA
• Description: Communication data error upon scanning.
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: EB
• Description: Read error in EEPROM of the laser unit
• Causes: 1 Harness connection failure between laser unit and main PCB ASSY. 2 Laser unit failure. 3 Engine PCB failure. 4 Main PCB failure
• Remedy: 1 Harness connection failure between laser unit and main PCB ASSY Check the harness connection between the laser unit and main PCB ASSY, and reconnect it. 2 Laser unit failure Replace the laser unit. 3 Engine PCB failure Replace the engine PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: EC
• Description: Fuser fan error.
• Causes: 1 Harness connection failure of fuser fan. 2 Fuser fan failure. 3 High-voltage power supply PCB failure. 4 Main PCB failure.
• Remedy: 1 Harness connection failure of fuser fan Check the harness connection of the fuser fan and reconnect it. 2 Fuser fan failure Replace the fuser fan. 3 High-voltage power supply PCB failure Replace the high-voltage power supply PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: ED
• Description: Communication with the wireless LAN PCB cannot be established upon startup of the power supply.
• Causes: 1 Harness connection failure of wireless LAN PCB. 2 Wireless LAN PCB failure. 3 Main PCB failure.
• Remedy: 1 Harness connection failure of wireless LAN PCB Check the harness connection of the wireless LAN PCB and reconnect it. 2 Wireless LAN PCB failure Replace the wireless LAN PCB. 3 Main PCB failure Replace the main PCB ASSY.

• Code: EE
• Description: Unavailability of communication after connecting to the wireless LAN PCB is detected.
• Causes: 1 Harness connection failure of wireless LAN PCB. 2 Wireless LAN PCB failure. 3 Main PCB failure.
• Remedy: 1 Harness connection failure of wireless LAN PCB Check the harness connection of the wireless LAN PCB and reconnect it. 2 Wireless LAN PCB failure Replace the wireless LAN PCB. 3 Main PCB failure Replace the main PCB ASSY.

• Code: EF
• Description: The supplied power is unstable.
• Causes: 1 The irregular power supply is detected. 2 Main PCB failure.
• Remedy: 1 The irregular power supply is detected Replace the low-voltage power supply PCB ASSY. Reset the irregular power supply detection counter following the procedure described in "5. IF THE MACHINE ERROR EF IS DETECTED AND THE LOW-VOLTAGE POWER SUPPLY PCB ASSY IS REPLACED". 2 Main PCB failure Replace the main PCB ASSY.

• Code: F0
• Description: USB flash memory does not work properly
• Causes: 1 Malfunction of firmware. 2 Main PCB failure
• Remedy: 1 Malfunction of firmware Rewrite the latest firmware. 2 Main PCB failure Replace the main PCB ASSY.