• Code: F040
• Description: Communication error between Controller and Print engine
• Causes: Control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the control PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, replace the control PWB and check for correct operation.

• Code: F041
• Description: Communication error between Controller and Scan engine
• Causes: Control PWB.
• Remedy: 1. Turn the main power swtch off and after 5 seconds, then turn power on. 2. Repair or replace the wire from the control PWB, that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, replace the control PWB and check for correct operation.

• Code: F050
• Description: Print engine ROM checksum error
• Causes: Control PWB.
• Remedy: 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. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, Replace the control PWB and check for correct operation.

• Code: F051
• Description: Scan engine ROM checksum error
• Causes: Control PWB
• Remedy: 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. Check the control software and upgrade to the latest, if necessary. 4. If not corrected, Replace the control PWB and check for correct operation.