I'm just making up words now... This is the part just after the bulb where it goes through a bunch of mirrors.

You can open this part up while the light path assembly is still in the projector.

Remove the 6 Screws - 2x10mm Plastic Tapping

Carefully lift up the top - there's a lens attached to the top piece (Blue Arrow) - don't scratch it on your way out!

The lenses in here are just sitting in place, with the top cover removed they will fall out if you tip it over!

Take note of the orientation of the lenses - take a photo before you touch anything and note the little marks on the top of some of the lenses (or maybe put a little dot of marker on the top?)

Some of the lenses are very easily scratched, so much that even using a cotton tip with isopropyl will scratch it! Be careful!