• Code: F2-70
• Description: Improper toner cartridge detection (BLACK)
• 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: F2-71
• 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.