• Code: F040
• Description: Communication error between Main PWB and Print engine
• Remedy: Main PWB: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the engine PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check that the FCC wire connecting between the main PWB (YC3) and the engine PWB (YC46) is normal and, if necessary, re-insert.Or, replace the FCC wire. 4. If not corrected, replace the main PWB .
  Engine PWB: 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB .
  HDD: Replace the HDD .

• Code: F041
• Description: Communication error between Main PWB and Scanner engine
• Remedy: Main PWB: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Check that the wires between the main PWB and the ISC PWB are normal. 3. If not corrected, replace the main PWB .I
  SC PWB: Replace the ISC PWB.

• Code: F050
• Description: Print engine ROM checksum error
• Remedy: Engine software: Install the latest engine software.
  Engine PWB: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Confirm that the EEPROM has been properly installed. 3. If not corrected, Replace the engine PWB .

• Code: F051
• Description: Scanner engine ROM checksum error
• Remedy: Scanner software: Install the latest scanner software.
  ISC PWB: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Confirm that the EEPROM has been properly installed. 3. If not corrected, Replace the ISC PWB.

• Code: F278
• Description: Power supply in drive system error
• Remedy: The main power switch was turned off before the power switch is pressed. Shutdown due to a power failure: Turn the main power swtch off and after 5 seconds, then turn power on. (Before turning power off, verify that the power key has been pressed and the power indicator has gone off, then switch the main power switch.)