Brother MFC-8820DN - Manual (Page 376)

22 - 24 TROUBLESHOOTING AND ROUTINE MAINTENANCE
10
Pack the drum unit and toner cartridge assembly, telephone line
cord, AC cord and printed materials in the original carton as
shown below:
11
Close the carton and tape it shut.
If you are returning the MFC to Brother as part of the Exchange
Service, pack only the MFC. Keep all separate parts to use with
your ‘Exchange’ machine.