Sony VPH-G90E Installation Manual page 82

Adjusting the Lens Focus and Scheimpflug
82
(GB) Adjustments
3
Press the CUT OFF R and B keys to display the green signal only.
4
Open the upper cover.
For opening the cover, see page 18
5
Adjust the center-focus.
Loosen the G1 screw, slide it so that the letters H at the center of the
screen are in focus, and then tighten the screw.
B1 screw
B2 screw
6
Adjust the corner-focus.
Loosen the G2 screw, slide it so that the letters H at all four corners of
the screen (white areas illustrated below) are in focus, and then tighten
the screw.
Repeat steps 5 and 6 until the green focus adjustment is completed.
(If the corner-focus cannot be adjusted completely, adjust it again after
finishing the Scheimpflug adjustment of the green lens.)
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
H H H H H H H H H H H H H H H H
Hint for the lens focus adjustment
The letter "H" is made up of dots. Adjust the focus so that dots of the letter
"H" can be clearly seen as illustrated below.
Placing a white paper over the front of the screen will make it easier to see
the dots.
.
(GB)
G1 screw R1 screw
G2 screw R2 screw