• Code: F2-66
• Description: Toner supply abnormality (MAGENTA)
  Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time.
• Causes: Toner motor section connector harness trouble Toner motor and toner density sensor trouble
• Remedy: Case 1 Cause Toner motor section connector harness trouble Check and remedy Check the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedy Check the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit.

• Code: F2-67
• Description: Toner supply abnormality (YELLOW)
  Toner end with the remaining quantity of 50% or more. The toner supply time exceeds 3 times as much as the specified time.
• Causes: Toner motor section connector harness trouble Toner motor and toner density sensor trouble
• Remedy: Case 1 Cause Toner motor section connector harness trouble Check and remedy Check the connector connection of the toner motor section. Check the connector harness (TM) connection to the main PWB. Case 2 Cause Toner motor and toner density sensor trouble Check and remedy Check the toner density sensor output. (SIM25-1) Check that the toner transport pipe is not clogged between the toner cartridge and the developing unit. Replace the toner cartridge (CRUM) if necessary. If replacement of the toner cartridge (CRUM) does not clear the trouble, check the developing unit.

• Code: F2-70
• Description: Toner cartridge improper cartridge detection (BLACK)
  Improper data are detected in the CRUM contents when the normal CRUM of the cartridge is detected.
• Causes: An improper cartridge is inserted. Toner cartridge trouble
• Remedy: Replace the toner cartridge.

• Code: F2-71
• Description: Toner cartridge improper cartridge detection (CYAN)
  Improper data are detected in the CRUM contents
  when the normal CRUM of the cartridge is detected.
• Causes: An improper cartridge is inserted. Toner cartridge trouble
• Remedy: Replace the toner cartridge.

• Code: F2-72
• Description: Toner cartridge improper cartridge detection (MAGENTA)
  Improper data are detected in the CRUM contents when the normal CRUM of the cartridge is detected.
• Causes: An improper cartridge is inserted. Toner cartridge trouble
• Remedy: Replace the toner cartridge.

• Code: F2-73
• Description: Toner cartridge improper cartridge detection (YELLOW)
  Improper data are detected in the CRUM contents when the normal CRUM of the cartridge is detected.
• Causes: An improper cartridge is inserted. Toner cartridge trouble
• Remedy: Replace the toner cartridge.

• Code: F2-74
• Description: Toner cartridge CRUM error (BLACK)
  CRUM cannot be read or written.
• Causes: Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. CRUM trouble
• Remedy: Case 1 Cause Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. Check and remedy Check the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedy Replace the toner cartridge. Case 3 Cause Control PWB (PCU) trouble Check and remedy Replace the PCU PWB.

• Code: F2-75
• Description: Toner cartridge CRUM error (CYAN)
  CRUM cannot be read or written.
• Causes: Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. CRUM trouble Control PWB (PCU) trouble
• Remedy: Case 1 Cause Connection trouble or disconnection of the connector and the harness between the PCU and the toner cartridge. Check and remedy Check the connector and the harness between the PCU and the toner cartridge. Case 2 Cause CRUM trouble Check and remedy Replace the toner cartridge. Case 3 Cause Control PWB (PCU) troubl