Fujitsu fi-4220C Operator's Manual page 16

Do not use the scanner if you smell strange odor.
If you sense heat coming from devices or detect
other malfunctions such as smoke, strange smells or
strange noises, immediately press down the power
button to turn off the scanner and then disconnect its
power plug.
Make sure that the smoke has disappeared, and
then contact the agent where you bought the
scanner.
Turn the scanner OFF if it is damaged.
If the scanner is damaged for any reason, press
down the power button the scanner and unplug the
power cable before contacting the authorized agent.
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