Try the following:
1. Perform the EEROM Backup from the HDD to the Main PCA (select Main PCA replaced).
2. Switch the printer Off and ON again.
3. If the System Error Code continues:
– Perform the Service Station Calibration.
– Replace the Drop Detector Assembly.
– Replace the Service Station Assembly.
Only replace one component at a time and check if the error has gone before replacing another component. Using this procedure you will be able to determine exactly which component failed.