There are two tabs on the back of the transfer roller.  Release these and push the white gears on the top right as you are looking at the unit from the tab side.  Push the white gear to the left to unseat it and then remove the assembly.  Vacuum out the toner and clean the window and then reassemble.  Will work like a charm.

There are two tabs on the back of the transfer roller.  Release these and push the white gears on the top right as you are looking at the unit from the tab side.  Push the white gear to the left to unseat it and then remove the assembly.  Vacuum out the toner and clean the window and then reassemble.  Will work like a charm.

You sir are a time and money saver.  Worked like a charm.  I was amazed at the amount of toner that was in the transfer roller.

You're a gun. 

Like the previous poster, I was amazed at the quantity of toner in the transfer roller unit. The printer is working like it just came out of the box. 

Thank you, thank you. Thank you. 

Thank you - I was stuck on a Sunday trying to print and this saved me - great help

This was an incredible help. Dude you just saved me at least $109. Thank you so much.

2024 Thanks!!!  You can also take off that little plastic window and clean it and super glue it back on.