• Code: F2-47
• Description: Room temperature thermistor trouble
• Causes: Room temperature thermistor trouble. Room temperature thermistor harness trouble. PCU PWB trouble.
• Remedy: Check connection of the harness and connector of the room temperature thermistor. Replace the room temperature thermistor harness. Replace the PCU PWB.

• Code: F2-48
• Description: Developing humidity sensor trouble
• Causes: Developing humidity sensor harness connection trouble. Developing humidity sensor trouble. PCU PWB trouble.
• Remedy: Check connection of the harness and connector of the developing humidity sensor. Replace the developing humidity sensor. Replace the PCU PWB.

• Code: F2-59
• Description: Room humidity sensor trouble
• Causes: Room humidity sensor harness connection trouble. Room humidity sensor trouble. PCU PWB trouble.
• Remedy: Check connection of the harness and connector of the room humidity sensor. Replace the room humidity sensor. Replace the PCU PWB.

• Code: F2-64
• Description: Toner supply operation trouble
• Causes: Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble. Toner cartridge trouble. Developing unit trouble.
• Remedy: Replace the toner density sensor. Connector and harness check. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.

• Code: F2-68
• Description: Waste toner full sensor trouble
• Causes: Waste toner full sensor trouble Connector/harness trouble. Waste toner pipe clogging
• Remedy: Replace the waste toner full sensor. Connector/harness trouble. Remove clogging in the waste toner pipe.

• Code: F2-69
• Description: Waste toner full detection
• Causes: Waste toner full detection
• Remedy: Replace the toner cartridge.

• Code: F2-70
• Description: Improper toner cartridge detection
• 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
• Causes: Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
• Remedy: Replace the toner cartridge. Replace the PCU PWB. Connector and harness check.