• 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: SD/MFPC PWB SRAM contents inconsistency
  The SD card or the MFPC PWB installed is improper. (Erroneous detection of account management data)
• Causes: The SD card was replaced. The MFPC PWB was replaced. SD card trouble MFPC PWB trouble
• Remedy: Refer to the pages on the necessary works after replacing the SD and the MFPC PWB in the Service Manual, and perform the works. Use SIM16 to cancel the error.

• Code: U2-10
• Description: MFPC PWB SRAM user authentication index check sum error
• Causes: SRAM user index information (user authentication basic data) check sum error. MFPC PWB SRAM trouble. MFPC PWB trouble. Strong external noises.
• Remedy: Use SIM16 to cancel the error. (Index information data in the HDD are transferred to the SRAM.) 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.)

• Code: U2-11
• Description: MFPC PWB EEPROM counter check sum error
• Causes: MFPC PWB EEPROM trouble EEPROM socket contact trouble MFPC PWB trouble Strong external noises.
• Remedy: Use SIM16 to cancel the error. (The previous writing data (about the latest 8 sheets) are written into the 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.)

• Code: U2-24
• Description: MFPC PWB SRAM memory user authentication counter check sum error
• Causes: MFPC PWB SRAM trouble MFPC PWB trouble Strong external noises.
• Remedy: Use SIM16 to cancel the error. (The check sum error detection data are calculated again to reset the proper check sum data.) 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.)

• Code: U2-30
• Description: MFPC PWB and PCU PWB manufacturing No. data inconsistency
  Inconsistency between the manufacturing No. saved
  in the PCU PWB and that in the MFPC PWB.
• Causes: When replacing the PCU PWB or the MFPC PWB, the EEPROM which was mounted on the PWB before replacement is not mounted on the new PWB. MFPC PWB trouble PCU PWB trouble
• Remedy: Check that the EEPROM is properly set. Check to confirm that the EEPROM which was mounted on the PWB before replacement is mounted on the new PWB. 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.) Replace the PCU PWB.

• Code: U2-40
• Description: SD card system storage data area error
• Causes: A file error occurs in the SD card system storage data partition. SD card trouble MFPC PWB trouble
• Remedy: Turn OFF/ON the power, and the backup data in the HDD are written into the SD card and the machine is automatically booted. Check the MFPC PWB, and replace if necessary. Check the SD card, and replace if necessary.

• Code: U2-41
• Description: HDD system storage data area error
• Causes: A file error occurs in the HDD system saved data area, disabling backup of the saved file of the machine adjustment values in the SD card. HDD trouble MFPC PWB trouble
• Remedy: Check the HDD, and replace if necessary. Check the MFPC PWB, and replace if necessary. When replacing the HDD and the MFPC PWB, refer to the chapter of "Necessary works and procedures of HDD and MFPC PWB replacement."