• 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 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) 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) trouble Check and remedy Replace the PCU PWB.

• Code: F2-76
• Description: Toner cartridge CRUM error (MAGENTA)
  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) trouble Check and remedy Replace the PCU PWB.

• Code: F2-77
• Description: Toner cartridge CRUM error (YELLOW)
  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) trouble Check and remedy Replace the PCU PWB.