FUJITSU IMAGE SCANNER FI-486PRRE - Manual (Page 94)

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3.7 Cleaning the Sensors
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2. Pull the ADF release lever toward you and lift up the ADF sheet guide.
3. Hold the ADF sheet guide with your hand to keep it open.
4. Wipe the six sensor surfaces with a cloth moistened with cleaner F1.
5. Lower the ADF upper sheet guide gently.
6. Lift the Upper transport unit a little to release the safety lock and then lower the
transport unit slowly.
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Document width sensor(in 6 locations)