Sony VPLFH31/B Operating Instructions Manual page 56

About lens position
The projection distance and lens shift range are measured with the lens position adjusted to the
center. To adjust the lens position to the center, follow the procedures below:
1
Rotate the left lens shift dial left or right
then align the screws with the v V marks
in four places, as illustrated, for adjusting
the lens horizontally.
2
Rotate the right lens shift dial clockwise
until the lens is fixed, to adjust the lens
vertically.
Note
Before adjusting the lens position to the center
and checking whether the lens position is
centered, turn off the power to prevent
projected light from entering the eyes.
56
Projection Distance and Lens Shift Range
1
For adjusting
Screws
lens
horizontally
2
For adjusting
v V
lens
marks
vertically