Fujitsu fi-4220C Operator's Manual page 20

Do not block the ventilation ports.
Do not block the ventilation ports. Blocking the
ventilation ports generates heat inside of scanner,
resulting in fire or scanner failure.
Do not place heavy objects or climb on top of the
scanner.
Do not place heavy objects on the scanner or use
the scanner's top surface for performing other work.
Improper installation might cause injuries.
Before moving the scanner, disconnect the power
plug from the power outlet.
Do not move the scanner with the power and
interface cables connected as this might damage the
cables, causing fire, electric shock or injuries.
Before moving the scanner, be sure to disconnect
the power plug from the power outlet, and
disconnect connector cables. Also, make sure that
the floor is free of obstructions.
xix