To solve this issue, please follow the steps below.

Step 1:
Turn the paper over in the paper tray, and print again. (Excluding Letterhead paper) If the problem still occurs, go to the Step 2.

Step 2:
Lift up the support flaps as follows:

1. Lift up the output tray support flap 1 (1).

2. Lift up the output tray support flap 2 (2).

3. Fold down the output tray support flap 1 (1) and fold down the output tray
   support flap 2 (2).

4. Try to print again.
   If the problem still occurs and you are printing only a few pages, go to the Step 3.
   If the problem still occurs and you are printing many pages, go to the Step 4.
   
    

Step 3:
Change Media Type setting as follows:

For Windows Users:

1. Open the printers folder.
2. Right click on the printer name icon and choose the "Printing Preferences" from the Menu.
3. Choose "Thin Paper" in the Media type from the Basic tab.

4. Click OK.
   If the problem still occurs, go to the Step 4.
   
    

For Macintosh Users:

1. Choose "Print" from the File menu and open the Print dialogue.
2. Choose "Thin Paper" in the Media type from the Basic tab.

3. Click Print.
   If the problem still occurs, go to the Step 4.
   
    

Step 4:
Change Improve Print Output setting as follows:

For Windows Users:

1. Open the printers folder.
2. Right click on the printer name icon and choose the "Printing Preferences" from the Menu.
3. Open the Advanced tab and click the Device Options icon.
4. Choose "Improve Print Putput" in the Printer Function.
5. Check on "Reduce Paper Curl" in the Improve Print Output.

6. Click OK.
   
    

For Macintosh Users:

1. Choose "Print" from the File menu and open the Print dialogue.
2. Open the Advanced tab.
3. Check on "Reduce Paper Curl" in the Improve Print Output.

4. Click Print.