The first time I fixed the camera without this manual. Lens was stuck so camera reported "lens error message". I opened it completely (and got few shocks from the flash capacitor :)) and when I assembled it again it worked fine.

The next time was by using paper for removing dust between the cylindrical parts of the lens from outside.

Now I did it again but with this time with this manual. I found the problem in the step 3 and 4. One part of the shutter was a bit bended and prevented full opening. It works great again!