Do the following (this example shows the QL-720NW):

1. Open "http://localhost:631/printers" in your browser.
2. Select the target printer and click it.
3. Check the "connection" item.

   If "usb usb:/dev/usb/lp0" or another printer name is displayed, reconfigure the printer as described below. If your printer is network-connected, reconfigure it regardless of the contents of the connection item. Depending on the Linux distribution or version, the procedures or descriptions may differ.

For USB connection
For network connection
 

For USB connection

1. Connect the printer to the computer via USB and turn it on.
2. Select [Modify Printer] from the [Administration] menu.
3. Select the target printer from [Local Printer].
4. Select the options you want, and then click [Continue] to confirm your selection.
   
    
   
    
5. Click [Modify Printer].
   
    

For network connection

1. Connect the printer to the network and turn it on.
2. Select [Modify Printer] from the [Administration] menu.
3. A list of connected printers appears. Select the target printer from [Discovered Network Printers].
4. Multiple identical printers may be listed depending on the supported network protocols. In that case, list them in descending order.
5. If the printer is not listed, select [Internet Printing protocol (http)], click [Continue], and then enter http://xx.xx.xx.xx (where xx.xx.xx.xx is the IP address of the printer) on the displayed page.
6. Select the options you want, and then click [Continue] to confirm your selection.
   
    
   
    
7. Click [Modify Printer].
   
    
8. Try to print again.
9. If you cannot print, repeat the steps from step 2, and then select a different printer in step 3.
   If you cannot print with any of the listed printers, after selecting [Internet Printing protocol (http)], enter the IP address manually.

   We recommend using a fixed IP address, not an IP address acquired from DHCP.