FUJITSU fi-4860C - Manual (Page 17)

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Do not block the ventilation ports.
Do not place heavy objects or climb on top of the scanner.
Before moving the scanner, disconnect the power plug from the power
outlet.
Protect the scanner from static electricity.
Do not block the ventilation ports. Blocking the ventilation ports generates
heat inside of scanner, that may results in fire or scanner failure.
Do not place heavy objects on the scanner or use the scanner's top
surface for performing other work. Improper installation might cause
injuries.
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 data cables. Also, make sure that the floor is
free of obstructions.
Install the scanner away from strong magnetic fields and other sources of
electronic noise. Also, protect the scanner from static electricity as this
might cause the scanner to malfunction.