Brother MFC-9420CN - Manual (Page 107)

Chapter A
A - 7
To use the machine safely
Please keep these instructions for later reference and read them before attempting any
maintenance.
WARNING
There are high voltage electrodes inside the machine.
Before you clean the inside of the machine, make sure you
have unplugged the telephone line cord first and then the
power cord from the AC power outlet.
Do not handle the plug with wet hands. Doing this might
cause an electrical shock.
The fusing unit becomes extremely hot during
operation. Wait until it has cooled down
sufficiently before replacing consumable
items.
The fusing unit is marked with a caution label.
Please do not remove or damage the label.
To prevent injuries, be careful
not to put your hands on the edge
of the machine under the
document cover or scanner unit.