Remove the transparent film over the lamp, and put it aside.

Don't forget the transparent film on reassembly, and make sure you line it up correctly when you replace it, in particular, with the oval hole on the left lining up with the similarly shaped hole in the plastic.

Lift the lamp handle. Undo the captive screw which secures the lamp. Disconnect the lamp power connector and lift out the lamp.

Take great care to hold the lamp only by its handle. It gets extremely hot when running, and any finger marks on the glass may reduce its life, or in the worst case, cause it to explode. Put it in a clean polythene bag in a safe place until you are ready to reinsert it.