LCD Projector Focus Problem

I have an Epson LCD projector model EMP-830. The unit was was dropped
and now it will not focus the top and bottom of the screen at the same
time. I suspect the lens assembly or focus control got knocked out of
alignment and needs a little adjustment. The projector was easy enough
to open, but I don't see any way to make an adjustment. Nothing looks
like it's been knocked loose or bent. Any ideas on how to adjust this
to get the screen to focus properly?

Thanks,
Steve Smith