Brother HL-1020 Service Manual page 213

Shipment of the Printer
If for any reason you must ship your Printer, carefully package the
Printer to avoid any damage during transit. It is recommended that you
save and use the original packaging. The Printer should also be
adequately insured with the carrier.
Warning
When shipping the Printer, the DRUM UNIT assembly including the
TONER CARTRIDGE must be removed from the Printer and placed in
the plastic bag. Failure to remove and place it in the plastic bag
during shipping will cause severe damage to the Printer and will
VOID THE WARRANTY.
1 Remove the drum unit.
3 Remove the AC cord and the paper tray
extension wire from the printer.
Re-pack the printer.
2 Place it in the plastic bag and seal the
bag completely.