At this point, you can remove the LE from the cabinet. Bundle the cables and PC board at the left edge of the opening to remove the LE. I found that the LE was stuck in place, but there were no other fasteners to remove. after a few tugs and a prying motion, it broke loose.
Remove the foam cushion around the projection lens.
I depended on the excellent photos by VIDEOBRUCE at the start of the thread. This LE is different, but there are enough similarities.
The next step is to remove the lens from the LE. IMPORTANT: read BEFORE removing the lens.
The Lens is held to the LE by 3 screws; two on top and one under the mirror assembly.
BEFORE you remove the two top screws, photograph them and/or mark their position by scribing the housing so you can get the lens close to the position is was originally mounted. The holes are elongated and there is a lot of movement possible. Too much movement and your alighment task will be made more difficult (and maybe even impossible) once you get it back together.
You might want to tighten the top screws initially to freshen the imprint they make on the lens housing as they will be needed during reassembly.
Ths bottom screw is difficult to access. You will need a slender philips screwdriver with a 5 3/8 inch shank (min) to remove the screw. I didn't have one, so I ended up making one out of a piece of heavy wire from a 5 gallon bucket handle. I flattened the end with a hammer and ground it to fit one of the screws that I removed from the top (I wasn't smart enough to note the position of the screws before I removed the screws).
Once you have removed the 3 screws, the lens assembly can easily be removed from the LE. Note that there is a rubber dust gasket around the base of the lens because of the large clearance between the LE and the lens.
I hung a damp cloth over the opening to the MD chip to keep out dust that might be stirred up in the process.
I found the typical film shown in the photos at the beginning of the thread. It took me a while to get the right light on the lens to see the film, but there was a lot of and it was tough to remove.
I used a lens cleaning solution and lens tissues to lightly scrub the film off the lens. I must have made 6 or more passes with as many tissues. When it was clean, I used a microfiber cloth to polish the surface of the lens.
There is no iris to get in the way on this lens. The lens consists of two major lens and they can be separated by removing 4 small philips screws. I found the inner lens surface to be very clean, although I cleaned it anyway. Once the lens is separated, you can see the mirror. I happened to see a small particle on the surface of the mirror, so I used the microfiber cloth to pick it up with just the lightest touch with a corner of the cloth. If this is like camera mirrors, it is front-silvered and delicate; I was happy not to go any farther with it.
Once the lens is clean, make every effort to get it on the LE in the same position as before.
Before you put the LE back in the cabinet. Look at the alignment screws that are on the front of the LE under the plate. There are 3 hex studs that need a 4 mm socket to engage them and a 5 mm hex nut that needs a hex stud to loosen/tighten it. These are accessable from the front of the set.
Even if you are careful, the LE will likely to bave to be aligned after you put it back in place. The image on mine went up-hill from left to right a few degrees. It might have been acceptable, but it was noticable.