Brother MFC640CW Service Manual page 189

Click Properties.
The BHL2-Maintenance Printer Properties window appears as shown below.
Click the Ports tab.
The port number assigned to the BHL2-Maintenance Printer, USB010 in this example, is one
that has been selected in Port on the BrUsbSn screen
(6) In the Serial No = BRO box on the BrUsbSn screen
(e.g., M2J012345) printed on the nameplate labeled to the machine as an ID code.
(7) In the Head Info. box, type 12 digits (e.g., 776601D00009) out of the 13-digit property code
(enclosed with asterisks, e.g., *J776601D00009*) which is printed on the bar code label
attached to the head/carriage unit. Click the OK button.
(page
(page 6-22), type the 9-digit serial number
6 - 2 4
6-22).
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