• Code: F010
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.

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

• Code: F040
• Description: Main PWB - print engine communication error
• Causes: Defective main PWB.
  Defective engine PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB. Replace the engine PWB and check for correct operation.

• Code: F041
• Description: Main PWB - scanner engine communication error
• Causes: Defective main PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.

• Code: F050
• Description: Print engine ROM checksum error˜
• Causes: Defective engine PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace engine PWB.

• Code: F051
• Description: Scanner engine ROM checksum error
• Causes: Defective engine PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace engine PWB.

• Code: F278
• Description: Power supply in drive system error
• Causes: Main power switch was turned off without using the power key, or a power failure has occurred.
• Remedy: Turn on power. (To switch off power, first press the power key until the main power indicator goes off, then turn the main power switch off.)