Code :

Code: F2-71
Description: Improper toner cartridge detection (C)
Causes: An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB.

Code: F2-72
Description: Improper toner cartridge detection (M)
Causes: An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB.

Code: F2-73
Description: Improper toner cartridge detection (Y)
Causes: An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB.

Code: F2-74
Description: Toner cartridge CRUM error (K)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector and harness trouble between PCU PWB and toner cartridge
Remedy: Replace the toner cartridge. Replace the PCU PWB. Check the connector and the harness between the PCU PWB and the toner cartridge.

Code: F2-75
Description: Toner cartridge CRUM error (C)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector and harness trouble between PCU PWB and toner cartridge
Remedy: Replace the toner cartridge. Replace the PCU PWB. Check the connector and the harness between the PCU PWB and the toner cartridge.

Code: F2-76
Description: Toner cartridge CRUM error (M)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector and harness trouble between PCU PWB and toner cartridge
Remedy: Replace the toner cartridge. Replace the PCU PWB. Check the connector and the harness between the PCU PWB and the toner cartridge.

Code: F2-77
Description: Toner cartridge CRUM error (Y)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector and harness trouble between PCU PWB and toner cartridge
Remedy: Replace the toner cartridge. Replace the PCU PWB. Check the connector and the harness between the PCU PWB and the toner cartridge.

Code: F2-78
Description: Image density sensor adjustment trouble
Causes: PCU PWB trouble Harness connection trouble between PCU PWB and Image density sensor
Remedy: Check printed image for image density trouble. Check the harness connection between PCU PWB and the sensor. Clean the image density sensor. Check the condition of Transfer belt surface. If the error cannot be fixed, replace the image sensor exclusive for registration. Replace the transfer belt. Replace the PCU PWB. Replace the developer.