• Code: C0
• Description: New toner detection lever failure
• Causes: Power off or front cover opened while detecting a new toner cartridge. New toner sensor failure
• Remedy: Reset the developing bias voltage and develop roller counter. Replace the relay front PCB.

• Code: C7
• Description: Insufficient DIMM Memory
• Causes: Main PCB failure.
• Remedy: Replace the main PCB ASSY.

• Code: C8
• Description: Secure print data full
• Causes: Main PCB failure.
• Remedy: Replace the main PCB ASSY.

• Code: C9
• Description: DIMM error
• Causes: Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: CA
• Description: Excess current to USB device
• Causes: Harness connection failure of USB host relay PCB ASSY. USB host relay PCB failure. Main PCB failure
• Remedy: Check the harness connection of the USB host relay PCB ASSY and reconnect it. Replace the USB host relay PCB ASSY. Replace the main PCB ASSY.

• Code: CD
• Description: Drum unit is not installed into the machine
• Causes: Dirt on electrodes on drum unit and machine body. HVPS PCB unit failure. Main PCB failure
• Remedy: Clean both electrodes. Replace the HVPS PCB unit. Replace the main PCB ASSY.

• Code: D1
• Description: Modem initialization failed
• Causes:
• Remedy:

• Code: DD
• Description: Fuser error other than 58, 59, 68, 69, 6A, 6B, 6C, 6D, 6E, 6F, 76, 78, DE and E2 are occurred
• Causes: Fuser unit failure. Main PCB failure. LVPS PCB failure
• Remedy: Replace the fuser unit. Replace the main PCB ASSY. Replace the LVPS PCB ASSY.