• Code: 877
• Description: Data Overwrite Security SD card error
  The 'all delete' function did not execute but the Data Overwrite Security Unit is installed and activated.
• Causes: • Defective SD card • SD card not installed
• Remedy: 1. Replace the NVRAM and then install the new SD card. 2. Check and reinstall the SD card.

• Code: 878
• Description: TPM electronic recognition error
  The main machine firmware failed to recognize TPM because USB flash is not operating or a system module was updated incorrectly.
• Causes: • Incorrect updating for the system firmware • Defective flash ROM on the controller board
• Remedy: Replace the controller board

• Code: 880
• Description: File format converter error
  A request for access to the File Format Converter (MLB) was not answered within the specified time.
• Causes: • File format converter disconnected • Defective file format converter
• Remedy: 1. Check the file format converter is connected correctly. 2. Replace the file format converter.

• Code: 881
• Description: Authentication area error
  Authentication application error is detected.
• Causes: • Error data in an authentication application reaches the management limit.
• Remedy: Turn the main switch off and on.

• Code: 899
• Description: Software performance error
  If the processing program shows abnormal performance and the program is abend, this SC is issued.
• Causes: • Controller board defective • Software defective
• Remedy: 1. Replace the controller board. 2. Turn the main switch off and on. 3. Update the firmware on the controller.

• Code: 900
• Description: Electrical total counter error
  The total count contains something that is not a number
• Causes: • NVRAM incorrect type • NVRAM defective • NVRAM data scrambled • Unexpected error from external source
• Remedy: 1. Check the connection between the NVRAM and controller. 2. Replace the NVRAM. 3. Replace the controller board.

• Code: 901
• Description: Mechanical total counter error
  The counter was moved during standby or while it is operating, possibly damaging the connector.
• Causes: • Counter defective
• Remedy: Check the connection of the mechanical counter

• Code: 920
• Description: Printer Error 1
  An internal application error was detected and operation cannot continue.
• Causes: • Software defective • Unexpected hardware resource (e.g., memory shortage)
• Remedy: 1. Software defective; switch off/on, or change the controller firmware if the problem is not solved 2. Insufficient memory