• Code: E1-00
• Description: IMC communication trouble
• Causes: An abnormality occurs in communication between the CPU and the IMC.
  - IMC – CPU signal line abnormality IMC Memory defect/data abnormality
  - Replace the MCU PWB with new one.
• Remedy: Replace the MCU PWB with new one.

• Code: E1-10
• Description: IMC trouble
• Causes: An abnormality occurs in the IMC.
  - USB chip error/CODEC error on the IMC.
  - Replace the MCU PWB with a new one.
• Remedy: Replace the MCU PWB with a new one.

• Code: E1-13
• Description: IMC flash ROM error
• Causes: An abnormality occurs in the IMC flash ROM.
  - IMC abnormality
  - Replace the MCU PWB with a new one. If downloading of the program is abnormally terminated, it may cause an error. Download the program again to avoid this.
• Remedy: Replace the MCU PWB with a new one. If downloading of the program is abnormally terminated, it may cause an error. Download the program again to avoid this.

• Code: E1-16
• Description: IMC DIMM memory read/write check error
• Causes: An installation error occurs in the IMC memory module.
  An error occurs during access to the IMC memory.
  - Improper installation of the IMC memory module.
  - IMC memory module abnormality
  - IMC memory contact abnormality
  - IMC abnormality.
• Remedy: Check installation of the memory module. Replace the memory module. Replace the MCU PWB with a new one.

• Code: E1-81
• Description: IMC communication interface error (parity)
• Causes: A parity error occurs in communication between the CPU and the IMC.
  - IMC memory defect/data abnormality
• Remedy: Check the memory of the IMC. Replace the MCU PWB with new one.

• Code: E1-82
• Description: IMC communication interface error (Overrun)
• Causes: An overrun error occurs in communication between the CPU and the IMC.
  - IMC memory defect/data abnormality.
• Remedy: Check the memory of the IMC. Replace the MCU PWB with new one.

• Code: E1-84
• Description: IMC communication interface error (Framing)
• Causes: A framing error occurs in communication between the CPU and the IMC.
  - IMC memory defect/data abnormality.
• Remedy: Check the memory of the IMC.

• Code: E7-02
• Description: LSU trouble
• Causes: The BD signal from the LSU cannot be detected in a certain cycle. (Always OFF or always ON)
  - LSU connector or LSU harness defect or disconnection Polygon motor rotation abnormality Laser beams are not generated. MCU PWB abnormality
• Remedy: Check connection of the LSU connector. Execute TC 61-03 to check the LSU operations. Check that the polygon motor rotates normally. Check that the laser emitting diode generates laser beams. Replace the LSU unit. Replace the MCU PWB.