• Code: C1-5110
• Display: Prepare Toner
• Description: Small amount of toner is left in the black cartridge. The estimated cartridge life of toner is close.
• Remedy: Prepare a new cartridge for a replacement.

• Code: C1-5120, C1-5130
• Display: Replace Toner
• Description: The black toner cartridge has almost reached its estimated cartridge life. The machine might stop printing.
• Remedy: If Stop, Continue or Mono Only appears in the LCD display, choose one of them. If you select Stop, the machine stops printing and you cannot print anymore without changing the cartridge. If you select Continue, the machine keeps printing but the printing quality cannot be guaranteed. If you select Mono Only, the machine prints the data in black only. Replace the toner cartridge for the best print quality when this message appears. Using a cartridge beyond this stage can result in printing quality issues.

• Code: C1-5411
• Display: Install Toner
• Description: The black toner cartridge is installed improperly or not installed.
• Remedy: Reinstall the toner cartridge two or three times to confirm it is seated properly.

• Code: C1-5512
• Display: Not compatible Black toner
• Description: The black toner cartridge is not suitable for your machine.
• Remedy: Install the yellow toner cartridge with a Samsung-genuine cartridge

• Code: C3-1110
• Display: Prepare IMG unit
• Description: The estimated life of imaging unit is close.
• Remedy: Prepare a imaging unit for replacement

• Code: C3-1130
• Display: Replace IMG unit
• Description: The imaging unit has almost reached its estimated life.
• Remedy: Replace the imaging unit with a new one

• Code: C5-1110
• Display: Prepare new Transfer belt
• Description: The transfer unit (ITB) has almost reached its estimated life.
• Remedy: The estimated life of a transfer unit (ITB) is close.

• Code: C5-1120
• Display: Replace new Transfer belt
• Description: The transfer unit (ITB) has almost reached its estimated life.
• Remedy: Prepare the transfer unit (ITB) with a new one.