Digiframe DF-SCA401w - Manual (Page 22)

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 After calibration, system LED lit to show scanner is ready for
scanning. If calibration has failed, red LED will appear and
flash 4 times per cycle.
9.2 Cleaning the scanner glass
The glass in the scanner should be cleaned periodically. If
debris is present, the scanned image may have streaks or
scratches.
To clean the scanner glass:
 Turn the scanner to its back side.
 Wet the supplied cleaning swab with some isopropyl
alcohol (95%).
 Release the glass by pressing the button on the right side
with your right hand. At the same time, use your left hand
to insert the cleaning swab into the right end of the glass
and then slide the cleaning swab to the left end as
indicated.
 Remove the cleaning swab from the scanner.
 Repeat step 3 and step 4 for five or six times
consecutively.
 Remove the supplied cleaning swab, store it in a safe
place and protect it from dust.
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