Try the following:

• Print labels so that barcodes are placed in the direction as shown below:

  1 Tape feed direction



• Try using another scanner.
   
• We recommend printing the barcodes with [Give priority to print quality] selected from the [Quality] options.

  Only the [Give priority to print speed] mode is available when using 2-color printing. (QL-800/810W/820NWB only)

  To display the [Quality] options:
  1. Open the printer properties. (To learn how to open the printer properties, see the FAQ: “How to open the Devices and Printers window”.)
  2. Right-click the printer you want to set up, and then click [Printing preferences].