• Code: L6-10
• Description: Polygon motor trouble
• Causes: Polygon motor trouble. LSU control PWB trouble. Connection trouble of the connector and the harness.
• Remedy: Use SIM61-1 to check the operation of the polygon motor. Check connection of the connector and the harness. Replace the LSU. Replace the LSU control PWB.

• Code: L8-01
• Description: Full wave signal detection error
• Causes: PCU PWB trouble. Power unit trouble. Connection trouble of the connector and the harness.
• Remedy: Replace the PCU PWB. Replace the power unit. Check connection of the connector and the harness.

• Code: L8-02
• Description: Full wave signal error
• Causes: An abnormality in the full wave signal frequency is detected. (The frequency is detected as 65Hz or above, or 45Hz or less.) PCU PWB trouble. Power unit trouble. Connection trouble of the connector and the harness. Power frequency, waveform abnormality.
• Remedy: Replace the PCU PWB. Replace the power unit. Check connection of the connector and the harness. Check the power waveform.

• Code: L8-20
• Description: Communication error of MFP/Mother board
• Causes: SCN mother board PWB - MFPC PWB connection trouble. MFPC PWB trouble. SCN mother board trouble.
• Remedy: Check connection between the SCN mother board PWB and the MFPC PWB. Check the ground of the main unit. Replace the MFPC PWB. Replace the SCN mother board.

• Code: P3-00
• Description: Scan accessory kit trouble
• Causes: Scan accessory kit HDD trouble. Communication error between Scan accessory kit and the serial I/F.
• Remedy: Replace Scan accessory kit HDD. Replace Scan accessory kit.

• Code: U1-01
• Description: Battery trouble
• Causes: 1) Battery life 2) Battery circuit abnormality
• Remedy: Check to confirm that the battery voltage is about 2.5V or above. Replace the battery.

• Code: U2-00
• Description: MFP EEPROM read/write error
• Causes: MFPC PWB EEPROM trouble EEPROM socket contact trouble MFPC PWB trouble Strong external noises.
• Remedy: Replace the MFPC PWB EEPROM. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.) Check the power environment.

• Code: U2-05
• Description: Erroneous detection of account management data
• Causes: Breakage of the authentication DB is detected.
• Remedy: When breakage of the authentication DB is detected, the MFP is rebooted and the DB tables are reconstructed, generating "U2-05". The message, however, is not displayed and only the trouble history is saved. The authentication data are cleared.