Sony VPH-G90E Installation Manual page 84

Adjusting the Lens Focus and Scheimpflug
4 Adjusting the green lens focus precisely
84
(GB) Adjustments
Note
Normally, adjust only the V screw for the green CRT. Adjusting the H
screw is required only for non-standard installation.
If the left and right parts of the screen are not in focus, make sure that the
projector and the screen are installed correctly.
For the red and blue scheimpflug, adjust both the H and V screws.
By turning the V screw, the CRT moves vertically to adjust the vertical tilt
of the focal plane.
V screw
Lens
By turning the H screw, the CRT moves horizontally to adjust the
horizontal tilt of the focal plane.
H screw
Lens
Repeat the above process until the upper and lower parts and the right and
left parts of the screen are in focus.
After adjusting the green scheimpflug, readjust the green lens focus until
the perfect focus is obtained.
For the procedure of the adjustment, see "1 Adjusting the green lens focus" on
page 81 .
(GB)
Proceed to the red lens focus and scheimpflug adjustments.
Up
B A
Focal
plane
Screen (Side view)
Right
D C
Focal
plane
Screen (Top view)
Moves vertically.
B
A
Moves horizontally.
D
C