If the magnetic heads are dirty, then MICR characters cannot be scanned correctly. Periodically, clean the magnetic heads with a commercially available audio head cleaner.

• Before you clean the scanner, turn OFF the scanner and computer, and disconnect the power cord from the power outlet. Otherwise, it may cause an electrical shock.
• Never clean the scanner with any kind of organic solvent, such as alcohol, benzene, or paint thinner. This may cause a fire and electrical shock, or cause the exterior of the scanner to disfigure or discolor.
• Never spray mild detergent or water directly on the scanning glass. The spray could penetrate below the glass and contaminate the light source and lenses.

1. Pull the Open button, and pull the Front Maintenance Cover open to the right and left.
   
   
   
   If you notice paper dust in the feed path when you open the Maintenance Cover, clean it out with a cotton swab.
   
   
   
2. Use a commercially available audio head cleaner to clean the magnetic heads.
   The magnetic heads are located in the positions shown in the diagram below.
   
   
   
   
3. Close the Front Maintenance Cover in the order shown in the diagram below.