• Code: A0-16
• Description: Data error of the energy-saving NIC controller firmware in the SD card
• Causes: SD card trouble. MFPC PWB trouble.
• Remedy: Reinstall the firmware. Replace the SD card. Replace the MFPC PWB.

• Code: A0-17
• Description: Inconsistency between the UI data and the CPU firmware version
• Causes: Combination error between the UI contents data and the CPU UI firmware version.
• Remedy: Install the firmware in the all-firmware version-up mode.

• 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.

• Code: A0-21
• Description: Conflict firmware and EEPROM data version (PCU)
• Causes: Inconsistency between the PCU firmware version and the EEPROM data version.
• Remedy: Check the combination of the firmware.

• Code: A0-22
• Description: Conflict firmware and EEPROM data version (SCU)
• Causes: Inconsistency between the SCU firmware version and the EEPROM data version.
• Remedy: Check the combination of the firmware.

• Code: C1-01
• Description: Charger cleaner trouble (K)
• Causes: The main charger unit (K) is not installed properly. There is an abnormality in the main charger unit (K). Connector connection trouble of the drum unit (K) HP sensor, the discharge lamp, or the after-transfer discharge lamp. Harness disconnection of the drum unit (K) HP sensor, the discharge lamp, or the after-transfer discharge lamp. HP sensor dirt. Charger cleaner motor (K) trouble. PCU PWB connector connection trouble/PWB trouble.
• Remedy: Use SIM6-4 to check the operation of the charger cleaner. Check disconnection of the main charger unit./ Replace. Check for disconnection of the connector of the drum unit (K) HP sensor, the discharge lamp, and the aftertransfer discharge lamp. Check the harness of the drum unit (K) HP sensor, the discharge lamp, and the after-transfer discharge lamp. (Since the earth wire is common to them, check the three positions.) Clean the HP sensor. Check disconnection of the PCU PWB connector./ Replace PWB. Replace the charger cleaner motor (K).

• Code: C1-10
• Description: Main charger trouble (Monochrome)
• Causes: The main charger unit (K) is not installed properly. There is an abnormality in the main charger unit (K). Disconnection of the high voltage PWB connector. Breakage of the high voltage harness. High voltage PWB trouble. PCU PWB trouble.
• Remedy: Check the output of the main charger with SIM8-2. Check disconnection of the main charger./Replace. Check disconnection of the high voltage PWB connector./Replace. Replace the high voltage PWB. Replace the PCU PWB.

• Code: C4-20
• Description: Transfer high voltage output trouble
• Causes: Transfer unit abnormality. Transfer unit insertion trouble. TC output harness disconnection, breakage. Transfer unit separation operation trouble. OPC drum abnormality (Does not rotate.) High voltage PWB trouble. PCU PWB trouble. PCU PWB - high voltage PWB harness disconnection, breakage.
• Remedy: Replace the transfer unit. Reinsert the transfer unit. Check or replace the TC output harness. Replace the high voltage PWB. Replace the PCU PWB. Check the harness between the PCU PWB and the high voltage PWB, and replace as needed.