• Code: 641
• Description: BCU control data transfer abnormal
  A sampling of the control data sent from the BCU reveals an abnormality.
• Causes: • Controller board defective • External noise • BCU board defective
• Remedy: 1. Replace the controller board. 2. Replace the BCU.

• Code: 650
• Description: Communication error of the remote service modem (Embedded RCG-M)
• Causes: -001 - Authentication error The authentication for the Embedded RCG-M fails at a dial up connection. • Incorrect SP settings • Disconnected telephone line • Disconnected modem board Check and set the correct user name (SP5816-156) and password (SP5816-157). -004 - Incorrect modem setting Dial up fails due to the incorrect modem setting. Same as -001 Check and set the correct AT command (SP5819-160). -005 - Communication line error The supplied voltage is not sufficient due to the defective communication line or defective connection. Same as -001 Consult with the user's local telephone company.
• Remedy:

• Code: 651
• Description: Incorrect dial up connection
  -001: Program parameter error -002: Program execution error. An unexpected error occurs when the modem (Embedded RCG-M) tries to call the center with a dial up connection.
• Causes: • Caused by a software bug
• Remedy: No action required because this SC does not interfere with operation of the machine.

• Code: 652
• Description: Remote service ID2 mismatch error
  The ID2 in the individual certificate does not match the ID2 in the NVRAM on the controller board.
• Causes: • The controller board in this machine has already been used in a machine in which RC Gate was installed. • The controller board NVRAM in this machine has already been used in a machine in which RC Gate was installed.
• Remedy: If an error occurs at installation of the RC Gate: 1. Check that the individual certificate is correct for the NVRAM in the machine and that the ID2 is correct. 2. Reinstall the RC Gate after writing the common certificate. If an error occurs after installation of the RC Gate: 1. Clear the RC Gate data. 2. Check that the individual certificate is correct for the NVRAM in the machine and that the ID2 is correct. 3. Reinstall the RC Gate after writing the common certificate.

• Code: 653
• Description: Remote service ID2 incorrect error
  The ID2 in the NVRAM on the controller board is incorrect.
• Causes: • ID2 is not exactly 17 bytes. • ID2 includes text which cannot be printed. • ID2 is all filled by spaces. • ID2 is null.
• Remedy: 1. Clear the RC Gate data. 2. Reinstall the RC Gate after writing the common certificate.

• Code: 669
• Description: EEPROM error
  Retry of EEPROM communication fails three times after the machine has detected the EEPROM error.
• Causes: • Caused by noise
• Remedy: Turn the main power switch off and on.

• Code: 670
• Description: Engine start up error
  The ready signal from the engine board is not detected.
• Causes: • Defective BCU.
• Remedy: Replace the BCU.

• Code: 681
• Description: RFID: Communication error
  • Communication error occurs when the RFID starts to communicate with the RFID receptor. • Retry of RFID communication fails three times after the machine has detected the RFID communication error.
• Causes: • Defective RFID reader and writer • Disconnected ASAP I/F • No memory chip on the toner cartridge • Noise
• Remedy: 1. Replace the RFID controller board. 2. Replace the toner cartridge.