Fujitsu fi-4220C Operator's Manual page 142

Symptom5
Quality of scanned text or lines is unsatisfactory.
NO
Document glass, document
Clean dirty locations.(*)
press pad, glass, and
sheet guides(A white portion)
clean?
YES
7
Contact the manufacturer's
authorized service center.
*) For details on how to clean dirty locations, see "Chapter5, DAILY
CARE."
7.2 Remedying Typical Troubles 113