Brother DCP-7030 Service Manual page 191

(3) Check the port (USB) which the machine is connected through and click "Serial No." in
the lower box.
Enter the serial number (the last nine digits) of the machine into the box at the right
hand side, and click the OK button.
The serial number is shown in the window, and check that it is correct.
CAUTION:
Refer to APPENDIX 3 to know how to read the serial number of the machine.
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