Check the following points

• Did you configure the settings in the scanner driver to scan in black & white mode?

• Are the glass and rollers inside the ADF clean?

If the problem persists, check the items in Before You Contact the Scanner Service Provider first, then contact the distributor/dealer where you purchased this product. Refer to the contact information in the Contact List if supplied with this product, or refer to the contact information in the Contact for Inquiries section if provided in Safety Precautions supplied with this product, and then make an inquiry.

Did you configure the settings in the scanner driver to scan in black & white mode?

Solution

Use a scanner driver to configure the scan settings that do not "binarize" (output in black and white), and then perform a scan.

The scanned image may differ from the original image significantly if you simply "binarize" (output in black & white) a picture or a photo.

Are the glass and rollers inside the ADF clean?

Solution

Clean the dirty parts.

For details, refer to Cleaning the Inside of the Scanner (ADF) with a Cloth.