Documents do not feed smoothly or easily; Several documents feed at one time; Scanned images have black lines and spot
How to clean the OptraImage 514/524 scan unit; OptraImage 514; Automatic Document Feeder (ADF)
Cleaning the Automatic Document Feeder (ADF)
Open the ADF cover.
Open the feed roller unit.
Use a damp soft cloth to clean the roller and belt inside the feed roller unit. Rotate the rollers by hand as you wipe them. Caution: Take care not to damage the nearby mylar guide when cleaning Roller A.
After closing the feed roller unit, use a damp soft cloth to clean the two rollers inside the document feeder cover. Note: Always clean the feed rollers after scanning documents that smear or contain substances that may be transferred to the rollers.
Cleaning the document glass Dirt in the following places adversely affects the quality of your scanned images: contact glass, slit glass (glass used for the ADF), white sheet on the underside of the cover, paper bar around the perimeter of the glass. Be sure to inspect these areas for signs of dirt each time you use the scanner. If any appear dirty, wipe them off with a dry or damp soft cloth before you begin your scan job.
Caution: Take care to avoid strong pressure on or impact to the scanner's glass while the document feeder is open. This is because the glass could become broken and cause injury. Be careful to keep your fingers away from the scanner's hinges to avoid pinching them when opening or closing the document feeder.