• Code: 652
• Description: Remote service ID2 mismatching ID2 for Remote certification is mismatching between the controller board and NVRAM.
• Causes: • Used controller board installed • Used NVRAM installed
• Remedy: 1. Install the correct controller board or anew controller board. 2. Install the correct NVRAM or new NVRAM.

• Code: 653
• Description: Incorrect remote service ID2
  ID2 stored in the NVRAM is incorrect.
• Causes: • Used NVRAM installed An unexpected error occurs when the modem (Embedded RCG-M) tries to call the center with a dial up connection
• Remedy: 1. Clear the ID2 in the NVRAM, and then input a correct ID2.

• Code: 670
• Description: Engine start up error
  The BCU fails to respond within the prescribed time when the machine is turned on.
• Causes: Connections between BCU and controller board are loose, disconnected, or damaged.
• Remedy: 1. Replace the BCU 2. Replace the controller board

• Code: 672
• Description: Controller start up error
  • After the machine is powered on, the communication between the controller and the operation panel is not established, or communication with controller is interrupted after a normal startup. • After startup reset of the operation panel, the attention code (FDH) or the attention acknowledge code (FEH) is not sent from the controller within 30 seconds. • After the controller issues a command to check the communication line with the controller at 30-second intervals, the controller fails to respond twice.
• Causes: • Controller stalled • Controller board installed incorrectly • Controller board defective • Operation panel connector loose or defective • The controller is not completely shut down when the main switch is turned off.
• Remedy: 1. Check the setting of SP5-875-001. If the setting is set to "1 (OFF)", change it to "0 (ON)"

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

• Code: 682
• Description: Memory chip at TD sensor: Communication error
  Retry of memory chip communication fails three times after the machine has detected the memory chip communication error.
• Causes: • Damaged memory chip data • Disconnected inter face • No memory chip on the development unit • Noise
• Remedy: 1. Replace the PCDU. 2. Replace the BCU.

• Code: 687
• Description: Memory address command error
  The BCU does not receive a memory address command from the controller 120 seconds after paper is in the position for registration.
• Causes: • Loose connection • Defective controller • Defective BCU
• Remedy: 1. Check if the controller is firmly connected to the BCU. 2. Replace the controller. 3. Replace the BCU.

• Code: 720-24
• Description: Finisher exit guide plate motor error
  After moving away from the guide plate position sensor, the exit guide is not detected at the home position within the prescribed time. The 1st detection failure issues a jam error, and the 2nd failure issues this SC code.
• Causes: • Guide plate motor disconnected, defective • Guide plate motor overloaded due to obstruction • Guide plate position sensor disconnected, defective
• Remedy: 1. Check the connections and cables for the components mentioned above. 2. Check for blockages in the guide plate motor mechanism. 3. Replace the guide plate position sensor and/or guide plate motor 4. Replace the finisher main board.