Remedy: Main/Engine PWB 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug the power cord and then turn on the power switch. 2. If not corrected, replace the Main/Engine PWB and check operation.
Code: F020
Description: Main/Engine PWB RAM checksum error
Remedy: Main memory of the Main/Engine PWB (RAM) 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug the power cord and then turn on the power switch. 2. If not corrected, replace the Main/Engine PWB and check operation.
Code: F040
Description: Communication error between Main/Engine PWB and Print engine
Remedy: Main/Engine PWB 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug the power cord and then turn on the power switch. 2. Repair or replace the wire from the Main/ Engine PWB that may be grounded. (Check short-circuit between 5V and 3.3V.) 3. Check both main and engine firmware, and upgrade to the latest version, if necessary. 4. If not corrected, replace the Main/Engine PWB.
Code: F050
Description: Print engine main program error
Remedy: Main/Engine PWB 1. Unplug the power cord from the wall outlet, and wait five seconds. Then plug the power cord and then turn on the power switch. 2. Confirm that the EEPROM has been properly installed. 3. Check both main and engine firmware, and upgrade to the latest version, if necessary. 4. If not corrected, replace the Main/Engine PWB.