• Code: F010
• Description: Control PWB checksum error
• Causes: Defective code ROM (flash memory). Defective control PWB.
• Remedy: Defective code ROM (flash memory). Turn the power switch off/on to restart the printer. If the error is not resolved, replace the control PWB.
  Defective control PWB. Replace the control PWB.

• Code: F020
• Description: Control PWB RAM checksum error
• Causes: Defective main memory (RAM) on the control PWB. Defective expanded memory (DIMM).
• Remedy: Defective main memory (RAM) on the control PWB. Turn the power switch off/on to restart the printer. If the error is not resolved, replace control PWB.
  Defective expanded memory (DIMM). Replace the expanded memory (DIMM).

• Code: F040
• Description: Control PWB engine communication error
• Causes: Defective control PWB.
• Remedy: Defective control PWB. Turn the power switch off/on to restart the printer. If the error is not resolved, replace control PWB.

• Code: F050
• Description: Control PWB engine checksum error
• Causes: Some error may have occurred when downloading the firmware of the control PWB. Defective control PWB.
• Remedy: Some error may have occurred when downloading the firmware of the control PWB. Download the firmware of the control PWB again using the memory card (SD card).
  Defective control PWB. Turn the power switch off/on to restart the printer. If the error is not resolved, replace control PWB.