| In the US, the KM-4030 (Falcon 1) uses a Print System N while the KM-4035 (Falcon 2) uses as Print System U. They have different part numbers and different firmwares, so I'm sure they aren't interchangeable.
I know very little about Olivetti, but the 400 looks like it uses a Print System U and Scan System E, just like the European KM-4035 (Falcon 2). I wouldn't know if they are compatible. |