On Thursday, Canadarm2 positioned itself on the port side of the space station, near Kibo, the Japanese lab module. Dextre was attached at the free end of Canadarm2's boom.
Starting Friday afternoon, Dextre will remove the faulty camera from Canadarm2's elbow joint and will re-install it on the arm's mobile base, where image quality is not as crucial.
The mobile base used to have a camera too but it broke down in 2012 and was removed by spacewalking astronauts.
The repair will be completed next Tuesday when astronauts aboard the ISS will place a functioning camera on a sliding table inside Kibo and will position it outside through its airlock. Dextre will pluck the camera from the Kibo airlock and will fasten it onto Canadarm2's elbow.