Please check the following points

1. Are the feeding roller or sepration pad worn out? Replace the feeding roller or separation pad if necessary.
2. Are the feeding roller and separation pad clean? Clean the feeding roller and separation pad.

1. If the problem still persists, please contact the distributor/dealer where you purchased this product.

1. –

1. *Note：The lifetime and the replacing procedure vary based on type of scanner.

▎The Cleaning Steps

1. Soak a clean cloth with some isopropyl alcohol (95%).
2. Press the ADF release button and open the front door.
3. Wipe the feeding rollers until they are completely cleaned.
4. Press both sides of the cover of the ADF reverse roller and pull the cover down. Be careful not to damage the spring.
5. Press and wipe the rollers one by one. Rotate the roller until the surfaces are completely cleaned.