Code :

Code: F2-71
Description: Improper toner cartridge detection (CYAN)
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 (MAGENTA)
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 (YELLOW)
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 (BLACK)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.

Code: F2-75
Description: Toner cartridge CRUM error (CYAN)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.

Code: F2-76
Description: Toner cartridge CRUM error (MAGENTA)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.

Code: F2-77
Description: Toner cartridge CRUM error (YELLOW)
Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.

Code: F2-78
Description: Registration image density sensor trouble (Transfer belt substrate reflection rate abnormality)
Causes: Image density (registration) sensor trouble (Sensor sensitivity adjustment trouble). PCU PWB trouble. Connection trouble of the connector and the harness. Image density (registration) sensor dirt. Transfer belt dirt, scratch.
Remedy: Replace the image density (registration) sensor. Replace the PCU PWB. Harness and connector connection trouble. Clean the image density (registration) sensor. Clean or replace the transfer belt.