• Code: U2-05
• Description: HDD/SRAM/EEPROM data discrepancy
• Causes: HDD replacement or SRAM memory replacement
• Remedy: Initialize the authentication information with SIM16, and import the backup data (exported data by device cloning) if any.

• Code: U2-10
• Description: SRAM user authentication index check sum error
• Causes: 1) SRAM trouble 2) Hang-up of the control circuit due to electrical noises 3) MFPcnt PWB SRAM access circuit trouble
• Remedy: Use SIM16 to cancel U2 trouble.

• Code: U2-11
• Description: EEPROM check sum error (MFP detection)
• Causes: 1) EEPROM device trouble 2) EEPROM device contact failure 3) Device access error due to electrical noises
• Remedy: Use SIM16 to cancel U2 trouble.

• Code: U2-22
• Description: SRAM memory check sum error
• Causes: MFPcnt PWB SRAM memory check sum error
• Remedy: Case 1 Cause SRAM trouble Check and remedy 1) Initialize the communication management table registered in SRAM and the FAX soft switch. 2) Since the registered contents have been deleted, register them again. Case 2 Cause Control circuit hang-up due to electrical noises Check and remedy Use SIM16 to cancel U2 trouble. Case 3 Cause MFPcnt PWB SRAM access circuit trouble Check and remedy Replace the MFPcnt PWB.

• Code: U2-23
• Description: MFPC section SRAM memory individual data check sum error
• Causes: MFPcnt PWB SRAM memory individual data check sum error (Communication management table, sender registration data, etc.)
• Remedy: Case 1 Cause SRAM trouble Check and remedy 1) Turn OFF/ON the power to initialize the data related to the check sum error contents automatically. 2) Since the registered contents have been deleted, register them again. Case 2 Cause Control circuit hang-up due to electrical noises Check and remedy Use SIM16 to cancel U2 trouble. Case 3 Cause MFPcnt PWB SRAM access circuit trouble Check and remedy Replace the MFPcnt PWB.

• Code: U2-24
• Description: SRAM memory user authentication counter check sum error
• Causes: 1) SRAM trouble 2) Control circuit hang-up due to electrical noises 3) MFPcnt PWB SRAM access circuit trouble
• Remedy: Use SIM16 to cancel U2 trouble.

• Code: U2-25
• Description: Flash memory user authentication counter check sum error
• Causes: Flash trouble. Control circuit hang-up due to electrical noises MFPcnt PWB FLASH access circuit trouble.
• Remedy: Use SIM16 to recalculate the check sum of the user counter and save the normal sum value.

• Code: U2-30
• Description: Serial number data discrepancy (MFP-PCU)
• Causes: EEPROM is not changed when the PCU/MFPcnt PWB is replaced.
• Remedy: 1) Check that EEPROM is properly set. 2) Check that EEPROM on the previous PWB is inserted to the newly installed PWB.