• 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: C1-03
• Description: Charger cleaner trouble (C)
• Causes: The main charger unit (C) is not installed properly. There is an abnormality in the main charger unit (C). Connector connection trouble of the drum unit (C) HP sensor, the discharge lamp, or the after-transfer discharge lamp. Harness disconnection of the drum unit (C) HP sensor, the discharge lamp, or the after-transfer discharge lamp. HP sensor dirt. Charger cleaner motor (C) 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 (C) HP sensor, the discharge lamp, and the aftertransfer discharge lamp. Check the harness of the drum unit (C) 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 (C).

• Code: C1-05
• Description: Charger cleaner trouble (M)
• Causes: The main charger unit (M) is not installed properly. There is an abnormality in the main charger unit (M). Connector connection trouble of the drum unit (M) HP sensor, the discharge lamp, or the after-transfer discharge lamp. Harness disconnection of the drum unit (M) HP sensor, the discharge lamp, or the after-transfer discharge lamp. HP sensor dirt. Charger cleaner motor (M) 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 (M) HP sensor, the discharge lamp, and the aftertransfer discharge lamp. Check the harness of the drum unit (M) 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 (M).

• Code: C1-07
• Description: Charger cleaner trouble (Y)
• Causes: The main charger unit (Y) is not installed properly. There is an abnormality in the main charger unit (Y). Connector connection trouble of the drum unit (Y) HP sensor, the discharge lamp, or the after-transfer discharge lamp. Harness disconnection of the drum unit (Y) HP sensor, the discharge lamp, or the after-transfer discharge lamp. HP sensor dirt. Charger cleaner motor (Y) 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 (Y) HP sensor, the discharge lamp, and the aftertransfer discharge lamp. Check the harness of the drum unit (Y) 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 (Y).

• Code: C1-10
• Description: Main charger trouble (Monochrome)
• Causes: Open circuit or short circuit of the main charger (Black) output.
• Remedy: 1) Check & Remedy Use SIM8-2 to check the output of [GB-K]. If the leakage noise or the flickering on the screen of the panel is detected; (1) Abnormality of the charger (BK) -> Remove and insert the charger (BK) or replace the charger (BK). (2) Imperfect insertion of the charger (BK) -> Remove and insert the charger (BK). (3) Abnormality of MC-K harness (Transformer T101 of the high-voltage MC PWB) -> Remove and insert MC-K harness or replace MCK harness. (4)Abnormality of GB-K/DV-KCMY wiring -> Check GB-K/DV-KCMY wiring./Replace. (5) Abnormality of the developing unit (K/C/M/Y) -> Insert and remove the developing unit./Replace. (6) Abnormality of the high voltage MC PWB spring contact (GB,DV). -> Check the high voltage MC PWB spring contact. 2) Check & Remedy Use SIM8-2 to check the output of [GB-K]. If the leakage noise etc. is not detected; (1) Charger (BK) not inserted. -> Insert the Charger (BK). (2) Disconnection/ breakage of MC-K harness (Transformer T101 of the high-voltage MC PWB) -> Insert the harness./Replace. (3) High MC PWB trouble. -> Replace the high MC PWB. (4) PCU PWB trouble -> Replace PCU PWB.