• Code: SC770
• Description: Cover interposer tray bottom plate motor error
  • After the motor starts to raise the bottom plate, the bottom plate position sensor does not detect the plate at the specified time (3 s). • After the motor starts to lower the bottom plate, the bottom plate HP sensor does not detect the bottom plate.
• Causes: • Bottom plate position sensor, disconnected, defective • Bottom plate HP sensor disconnected, defective

• Code: SC775
• Description: Cover interposer tray feed motor
• Causes: • Motor harness disconnected, loose, defective • Motor overload • Motor defective

• Code: SC790
• Description: Finisher staple waste hopper full
  The staple waste hopper is full of cut staples.
• Causes: • If the hopper is full, empty the hopper • If the hopper is not full, the hopper full sensor is disconnected, defective

• Code: SC817
• Description: Boot loader error
  The boot loader cannot read one of the following: self-diagnostic module, kernel, or one of the files of the root file system, or the check of one of these items on the system SD card failed.
• Causes: • File or module on the system SD card is corrupted • File or module on the system SD card is illegal • Make sure that the system SD card is the one designed for the machine • Replace system ROM on the controller board

• Code: SC818
• Description: Watchdog error
  While the system program is running, a bus hold or interrupt program goes into an endless loop, preventing any other programs from executing.
• Causes: • System program defective; switch off/on, or change the controller firmware if the problem cannot be solved • Controller board defective • Controller option malfunction

• Code: SC819
• Description: Fatal kernel error
  Due to a control error, a RAM overflow occurred during system processing. One of the following messages was displayed on the operation panel.
• Causes: • System program defective • Controller board defective • Optional board defective • Replace controller firmware

• Code: SC821
• Description: Self-diagnostic error 2: ASIC
  The ASIC provides the central point for the control of bus arbitration for CPU access, for option bus and SDRAM access, for SDRAM refresh, and for management of the internal bus gate.
• Causes: • ASIC (controller board defective)

• Code: SC822
• Description: Self-diagnostic error 3: HDD
• Causes: • HDD defective • HDD harness disconnected, defective • Controller board defective