To solve this issue, please follow the steps below.

Step 1:
Make sure that the grey levers inside the back cover are in the up position as follows:

1. Open the back cover of the printer.
   

    

2. Check that both grey levers inside the back cover are in the up position.
   If not: one grey lever is in the up position and another is in the envelope position or both grey levers are in the envelope position, please change both to the up position.
   2

    

3. Close the back cover and then try to print again.
   

   If you print on an envelope or thicker paper, change both lever positions to the envelope one, and then try to print again with the back cover open.

Step 2:
Make sure that the media type setting in the printer driver matches the type of paper you are using.
Click here to see the kinds of paper you can use.

If not, choose the appropriate media type and then try to print again.

Step 3:
Choose the "Improve Toner Fixing" from the printer driver and try to print again.
The instruction varies depending on your Operating System (OS). Choose your OS and follow the instructions.
Windows | Macintosh

For Windows users:

[Printer driver]
 

1. Open Printing Preferences. (Click here to see how to open Printing Preferences.)
    
2. Open the Advanced tab and click "Other Print Options".
   

    

3. Choose "Improve Print Output" and then choose "Improve Toner Fixing".
   

    

4. Click OK.
   The setting has been changed. Print from the application as usual.

[BR-Script printer driver]
 

1. Open Printing Preferences. (Click here to see how to open Printing Preferences.)
    
2. Open the Layout tab and click Advanced....
   

    

3. Choose "Improve Toner Fixing" in the Improve Print Output of the Printer Features.
   

    

4. Click OK.
   The setting has been changed. Print from the application as usual.

For Macintosh users:

[Printer driver]

1. Open the Print dialog. (Click here to see the details of how to open Print dialog.)
    
2. [Mac OS X 10.3.9 or 10.4.x users]

    

   1. Choose the "Print Settings" option from the pop-up menu under Presets.
       
   2. Click Advanced and then click "Improve Print Output".
      

    

   
   [Mac OS X 10.5.x or later users]

    

    

   1. Choose the "Print Settings" option from the print options pop-up menu.
       
   2. Click Advanced and then click "Improve Print Output".
      

       

3. Choose "Improve Toner Fixing" and click OK.
   

    

4. Click Print.

[BR-Script printer driver]

1. Open the Print dialog. (Click here to see the details of how to open Print dialog.)
    
2. [Mac OS X 10.3.9 or 10.4.x users]

    

   1. Choose the "Printer Features" option from the pop-up menu under Presets.
       
   2. Choose "Set 3" in the Feature Sets.
       
   3. Choose "Improve Toner Fixing" in Improve Print Output.
      

    

   [Mac OS X 10.5.x or later users]

    

    

   1. Choose the "Printer Features" option from the print options pop-up menu.
       
   2. Choose "General 2" in Feature Sets.
       
   3. Choose "Improve Toner Fixing" in Improve Print Output.
      

    

3. Click Print.