Check the amount of ink remaining

1. Confirm that the printer is powered on.
   
   
2. Open the paper output tray and top cover. 
   
   Note:  Gently open the paper output tray while holding it.
   
   
3. After confirming that the print head moves to the center, open the inner cover.
   
   
4.  Remove the ink tank.
   
   
   
   
5. Check the remaining ink amount.   If there is no ink in the ink tank, replace it with a new one.
   
   
   
   <1> Ink tank with remaining ink
   <2> Ink tank with no ink
   
   
6. Close the inner cover and top cover. 
   
   
7. If the error returns, reset the printer.
   
   
8. If the error returns and the correct ink tanks are installed properly, there is a problem with the optical sensor in the printer.