Brother MFC 7840W - Manual (Page 148)

Chapter B
134
i
Pack the drum unit and toner cartridge
assembly, AC cord and printed
materials in the original carton as shown
below:
Note
If you are returning your machine to
Brother as part of the Exchange Service,
pack only the machine. Keep all separate
parts and printed materials to use with
your “Exchange” machine.
j
Close the carton and tape it shut.