• Code: F2 40
• Description: ATC sensor value abnormality
• Causes: Connector connection trouble Toner cartridge installation trouble Sensor breakdown
• Remedy: Connect the connector again. Install the developing unit again. Replace the developing unit with a normal one.

• Code: F2 64
• Description: Toner supply abnormality. When toner near end is detected with the toner supply time of 50% or less. When the toner supply time exceeds 300%.
• Causes: ATC sensor abnormality Toner supply abnormality
• Remedy: Replace the toner cartridge. Replace the developing unit.

• Code: F2 70
• Description: •Improper cartridge (Destination error, life cycle error) •Identific t ion error •Model error •Type error •Destination error •Data abnormality •Misc error Detail •The destination of the machine differs from that of the CRUM. •The trade mark code of the CRUM differs. •The company code of the CRUM differs. •The boot program model code does not coincide with the CRUM model code. •When the CRUM type is other than genuine/ conversion/production rotation. •The machine destination differs from the CRUM destination.
• Causes: CRUM chip defect Improper toner cartridge.
• Remedy: Replace the toner cartridge.

• Code: F2 74
• Description: CRUM chip communication error. An error occurs during communication between the MCU and the CRUM chip. The CRUM identification error occurs.
• Causes: CRUM chip abnormality Developing unit disconnection MCU PWB abnormality
• Remedy: Replace the toner cartridge. Check installation of the developing unit. Use SIM16 to cancel. Replace the MCU PWB.

• Code: H3 00
• Description: Heat roller high temperature detection (MAIN). The fusing temperature exceeds 245C°.
• Causes: Thermistor abnormality Control PWB abnormality Fusing section connector disconnection.
• Remedy: Use SIM 5-02 to check the heater lamp blinking operation. When the lamp blinks normally. Check the thermistor and its harness. Check the thermistor input circuit on the control PWB. When the lamp keeps ON. Check the power PWB and the lamp control circuit on the MCU PWB. Cancel the trouble with SIM 14.

• Code: H3 01
• Description: Heat roller high temperature detection (SUB). The fusing temperature exceeds 245°C.
• Causes: Sub thermistor abnormality Heater lamp abnormality Thermostat abnormality Main PWB abnormality
• Remedy: Use SIM 5-02 to check the heater lamp blinking operation. When normally lighting. Check the sub thermistor and its harness. Check the sub thermistor input circuit on the MAIN PWB. When not normally lighting. Check the lamp control circuit on the MCU PWB. Cancel the trouble with SIM 14.

• Code: H4 00
• Description: Heat roller low temperature detection. When the fusing temperature is 150C° or less in 55 sec from starting warming-up. When the warm-up complete temperature is not reached in 30 sec from reaching 150C°. When the fusing temperature is less than 100C° in 20 sec from the ready state. When the fusing temperature is less than 80C° for more than 300ms in the ready state or in printing. When the fusing temperature is less than 80C° for more than 300ms in the standby mode at a low temperature.
• Causes: Thermistor abnormality Heater lamp abnormality Thermostat abnormality Control PWB abnormality
• Remedy: Use SIM 5-02 to check the heater lamp blinking operation. When the lamp blinks normally. Check the thermistor and its harness. Check the thermistor input circuit on the control PWB. When the lamp does not light up. Check for disconnection of the heater lamp and the thermostat. Check the interlock switch. Check the power PWB and the lamp control circuit on the MCU PWB. Cancel the trouble with SIM 14.

• Code: H5 01
• Description: 5 continuous POUT not-reached error. When 5 continuous not-reached jams to the paper exit sensor (POUT) occur. The jam counter is backed up and it is used in a job after turning on the power.
• Causes: Jam paper is not removed from the fusing unit. (Jam paper remains.) Paper exit sensor breakdown or harness connection trouble Fusing unit installation trouble
• Remedy: Check for jam paper remaining in the fusing unit. (winding, etc.) Check the POUT sensor harness, and check installation of the fusing unit. Use SIM14 to clear the self diag display.