Brother MFC-J3720 Product Safety Manual page 9

When carrying the machine, remove the tray if it has been extended to hold large paper such as
A3, Legal or ledger size paper. The weight of the paper could cause the tray to fall and cause
injury to you.
(MFC-J3520 and MFC-J6520DW)
Do not remove the serial number and instruction labels that are affixed to the machine.
IMPORTANT
Disruption of power can wipe out information in the machine's memory.
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