• Code: 724-85
• Description: Upper limit switch error (D585)
  The upper limit switch of the 500-sheet finisher (D585) is pushed due to tray lift error or some problems.
• Causes: • Upper limit switch pulled up • Defective upper limit swtich
• Remedy: 1. Check the harness. 2. Check for blockage around the upper limit switch. 3. Replace the upper limit switch.

• Code: 770
• Description: Shift motor error
  The shift motor HP sensor does not detect any change for 1.86 seconds after the shift motor has turned on at power on or during its operation.
• Causes: • Defective shift motor • Defective shift motor HP sensor
• Remedy: 1. Check the connections to the shift motor and the shift motor HP sensor. 2. Replace the shift motor or the shift motor HP sensor.

• Code: 791
• Description: Bridge unit error
  The machine recognizes the finisher, but does not recognize the bridge unit.
• Causes: • Defective connector • Broken harness
• Remedy: 1. Check the connections between the bridge unit and the machine. 2. Install a new bridge unit.

• Code: 792
• Description: Finisher error
  The machine does not recognize the finisher, but recognizes the bridge unit.
• Causes: • Defective connector • Defective harness • Incorrect installation
• Remedy: 1. Check the connections between the finisher and the machine. 2. Install a new finisher.

• Code: 816
• Description: Energy saving I/O sub-system error
  The energy saving I/O sub-system detects an error.
• Causes: • Controller board defective
• Remedy: Replace the controller board.

• Code: 817
• Description: Monitor error This is a file detection and electronic file signature check error when the boot loader attempts to read the self-diagnostic module, system kernel, or root system files from the OS Flash ROM, or the items on the SD card in the controller slot are false or corrupted.
• Causes: • OS Flash ROM data defective • SD card data defective
• Remedy: 1. Change the controller firmware. 2. Use another SD card.

• Code: 819
• Description: Fatal kernel erro
  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
• Remedy: 1. Replace the controller firmware.

• Code: 821
• Description: Self-diagnostics error: ASIC
• Causes: [0B00] ASIC register check error The write-&-verify check has occurred in the ASIC. Defective ASIC device 1. Replace the controller board. [0B06] ASIC detection error The I/O ASIC for system control is not detected. • Defective ASIC • Defective North Bridge and PCII/F 1. Replace the controller board.
• Remedy: