• Code: 4C01
• Display: Replace Toner Open the Front Cover, replace Toner Cartridge.
• Description: Dot count or develop roller counter of the toner has reached the upper limit in the toner stop mode.
• Remedy: <User Check> • Replace the toner cartridge which has reached the upper limit. 1 If the error display is not cleared after replacing the toner cartridge with a new one, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 4D01
• Display: Replace Toner
• Description: Dot count or develop roller counter of the toner has reached the upper limit in the toner continuous printing mode.
• Remedy: <User Check> • Replace the toner cartridge which has reached the upper limit. 1 If the error display is not cleared after replacing the toner cartridge with a new one, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 4E01
• Display: Toner Ended Open the Front Cover, replace Toner Cartridge.
• Description: The toner cartridge has reached the upper limit in the toner continuous printing mode.
• Remedy: <User Check> • Replace the toner cartridge which has reached the upper limit. 1 If the error display is not cleared after replacing the toner cartridge with a new one, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 4F01
• Display: Cartridge Error Put the Toner Cartridge back in.
• Description: The new toner sensor could not detect the new toner cartridge correctly.
• Remedy: <User Check> • Replace the toner cartridge with a new one again. • If the machine is on the uneven surface, place it on a level surface. 1 Connection failure of the new toner sensor PCB flat cable Reconnect the new toner sensor PCB flat cable. 2 New toner actuator coming off or caught in sections of the machine Reattach the new toner actuator. 3 Develop joint coming off or caught in sections of the machine Reattach the develop joint. 4 New toner sensor failure Replace the new toner sensor PCB ASSY. 5 If the error display is not cleared after replacing the toner cartridge with a new one, the main PCB is faulty. Replace the main PCB ASSY.

• Code: 6001
• Display: Cover is Open Close the Front Cover.
• Description: The front cover sensor detected that the front cover was open.
• Remedy: <User Check> • Close the front cover. 1 Front cover failure Replace the front cover. 2 Front cover sensor failure Replace the high-voltage power supply PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 6004
• Display: Cover is Open Close the Fuser Cover which can be found behind the Back Cover of the machine.
• Description: The eject sensor detected that the fuser cover was open.
• Remedy: <User Check> • Close the fuser cover. 1 Eject actuator coming off or caught in sections of the machine Reattach the eject actuator. 2 Fuser cover attachment failure Reattach the fuser cover. 3 Connection failure of the eject sensor PCB flat cable Reconnect the eject sensor PCB flat cable. 4 Eject sensor PCB failure Replace the eject sensor PCB ASSY. 5 Main PCB failure Replace the main PCB ASSY.

• Code: 6101
• Display: No Toner Open the Front Cover, then install Toner Cartridge.
• Description: The new toner sensor detected that the toner cartridge was not set.
• Remedy: <User Check> • Set the toner cartridge correctly. • Replace the toner cartridge with a new one. 1 New toner actuator coming off Reattach the new toner actuator. 2 Connection failure of the new toner sensor PCB flat cable Reconnect the new toner sensor PCB flat cable. 3 New toner sensor PCB failure Replace the new toner sensor PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 6801
• Display: Cooling Down Wait for a while
• Description: The side thermistor of the fuser unit or the internal temperature sensor detected a temperature higher than the specified value.
• Remedy: <User Check> • Lower the room temperature. • Keep the machine away from heating appliances. 1 Side thermistor failure Replace the fuser unit. 2 Main PCB failure Replace the main PCB ASSY.