Fujitsu fi-5120C Getting Started Manual page 9

Be aware of the pick spring.
When you perform cleaning, make sure
that the inside of the scanner is free of any
foreign object, and be careful not to get
your hand or the cloth caught on the pick
spring (metal part) as a deformed pick
spring (metal part) may cause injury.
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fi-5120C/fi-5220C Image Scanner Getting Started