• Code: 84
• Description: IMC communication interface error (Framing)
  A framing error occurs in communication between the CPU and the IMC.
• Causes: IMC memory defect/data abnormality.

• Code: E1-00
• Description: IMC communication trouble
  An abnormality occurs in communication between the CPU and the IMC.
• Causes: IMC - CPU signal line abnormality IMC Memory defect/data abnormality

• Code: E1-82
• Description: IMC communication interface error (Overrun)
  An overrun error occurs in communication between the CPU and the IMC.
• Causes: IMC memory defect/data abnormality.

• Code: E7-02
• Description: LSU trouble
  The BD signal from the LSU cannot be detected in a certain cycle. (Always OFF or always ON)
• Causes: LSU connector or LSU harness defect or disconnection Polygon motor rotation abnormality Laser beams are not generated. MCU PWB abnormality.

• Code: F5-02
• Description: Copy lamp lighting abnormality
  The copy lamp does not turn on.
• Causes: Copy lamp abnormality Copy lamp harness abnormality CCD PWB harness abnormality.

• Code: H2-00
• Description: Thermistor open
  The thermistor is open. The fusing unit is not installed.
• Causes: Thermistor abnormality Control PWB abnormality Fusing section connector disconnection The fusing unit is not installed.

• Code: H3-00
• Description: Heat roller high temperature detection
  The fusing temperature exceeds 240°C.
• Causes: Thermistor abnormality Control PWB abnormality Fusing section connector disconnection.

• Code: H4-00
• Description: Heat roller low temperature detection
  The fusing temperature does not reach 185°C within 27 sec of turning on the power, or the fusing temperature keeps at 140°C.
• Causes: Thermistor abnormality Heater lamp abnormality Thermostat abnormality Control PWB abnormality