Brother HL-4040CN Service Manual page 16

Safety Precautions
Listed below are the various kinds of "WARNING" messages included in this manual.
WARNING
There are high voltage electrodes inside the machine. Before you clean the inside of
the machine or replace parts, make sure that you have turned off the power switch and
unplugged the machine from the AC power outlet.
DO NOT handle the plug with wet hands. Doing this might cause an electrical shock.
The fuser unit becomes extremely hot during operation. Wait until it has cooled down
sufficiently before replacing consumable items. DO NOT remove or damage the caution
label located on or around the fuser.
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