• Code: A0-01
• Description: PCU PWB ROM error
• Causes: The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. ROM trouble.
• Remedy: Use SIM49-1 to perform the version-up procedure again. Replace the ROM.

• Code: A0-02
• Description: SCU PWB ROM error
• Causes: The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. ROM trouble.
• Remedy: Use SIM49-1 to perform the version-up procedure again. Replace the ROM.

• Code: A0-04
• Description: ACU PWB ROM error (when scanner expansion kit is installed)
• Causes: The firmware update is failed because of turning OFF the power during the firmware update operation, etc. ROM trouble.
• Remedy: Use SIM49-1 to execute update of the firmware. Replace the ROM.

• Code: A0-10
• Description: MFP PWB ROM error
• Causes: Firmware combination error between the MFP and the image ROM (color correction ROM).
• Remedy: Upgrade the firmware versions of the MFP and the image ROM (color correction ROM).

• Code: A0-11
• Description: Firmware version inconsistency (MFP - PCU)
• Causes: Firmware combination error between the MFP and the PCU.
• Remedy: Check the combination between the MFP and the PCU.

• Code: A0-12
• Description: Firmware version inconsistency (MFP - SCU)
• Causes: Firmware combination error between the MFP and the SCU.
• Remedy: Check the combination between the MFP and the SCU.

• Code: A0-15
• Description: DSK BOOT version disagreement
• Causes: Firmware combination error between the DSK and the BOOT.
• Remedy: Check the combination between the DSK and the BOOT.

• Code: A0-20
• Description: Conflict firmware and EEPROM data version (MFP)
• Causes: Inconsistency between the MFP firmware version and the EEPROM data version.
• Remedy: Check the combination of the firmware.