The serial number can be found on the label on the back side of the machine. MF4890dw / MF4880dw MF4770n The serial number is a three letter prefix followed by five numbers.
The serial number (a character string of three letters and a 5-digit number) is written on the rating label on the rear side of the machine. MF4890dw/ MF4880dw MF4770n
