• Code: U2-22
• Description: MFPC PWB SRAM memory check sum error
• Causes: MFP PWB SRAM trouble Strong external noises Access circuit trouble
• Remedy: The data of the communication management table in the SRAM is initialized when an error occurs, register the deleted data again Use SIM16 to cancel the error Replace the MFPC PWB

• Code: U2-23
• Description: MFPC PWB SRAM memory user authentication counter check sum error
• Causes: SRAM trouble Runaway of the control circuit due to the noise MFPC PWB SRAM access circuit trouble
• Remedy: Initialize automatically the data relating to the content that check sum error occurs by the power-OFF/ON. The saved "Scan" and "Fax" data may be deleted by auto initialization. To check if there're any deletion of those data above, by "Job Log". If there're any deletions, ask customer to do deleted job again. Clear the U2 trouble by SIM16. Replace the MFPC PWB.

• 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
• 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."

• Code: U2-42
• Description: Machine adjustment data (system storage data area) error
• Causes: The saved file of the machine adjustment values in the SD card and the HDD cannot be found or is broken. Both of the SD card set data and the HDD system saved data area are broken. HDD trouble MFPC PWB trouble SD card trouble
• Remedy: Check the HDD, and replace if necessary. Check the MFPC PWB, and replace if necessary. Check the SD card, and replace if necessary. When replacing the HDD, the MFPC PWB, and the SD card, refer to the chapter of "Necessary works and procedures of HDD, MFPC PWB, and SD card replacement." Use SIM to adjust the machine again and set the adjustment values.

• Code: U2-50
• Description: HDD*1 user authentication data check sum error (SD card when no HDD is installed)
• Causes: HDD trouble*1 MFPC PWB trouble Strong external noises.
• Remedy: Check the data related to the check sum error (address book, image send system registration data (senders record, meta data)) and register again. Use SIM16 to cancel the U2 trouble. Replace the HDD*1. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the HDD and the MFPC PWB in the Service Manual, and perform the works.)*1