Sony VPH-G90U Service Manual page 91

Adjusting the Registration
4 Green KEY (keystone) and PIN (pincushion) adjustments for the whole screen
Adjust the trapezoidal distortion and the pin-cushion distortion in the
vertical and horizontal directions.
First adjust the distortion on the whole screen roughly, then adjust the lines
at the top, bottom, right end and left end of the screen separately.
A Horizontal line adjustment
If the picture's borders are as shown by the dotted line in the illustrations
below, adjust them with the corresponding arrow key so that they are
parallel (bold lines illustrated on the left).
1
Press the KEY key.
The HATCH pattern appears.
The adjustment mode, the adjustment position and the adjustment item
overlap the HATCH pattern.
The distortion on the whole screen is adjusted in position No. 1.
K E Y A D J
R G B
H : 1 2 8
V : 1 2 8
2
Adjust the distortion as illustrated below with the V and v keys.
In position No. 1 of green adjustment, the green, red and blue lines
move together by pressing the v or V key.
3
Press the PIN key.
100
Adjustments
P O S I T I O N
N o . 1
A L L
ADJ:
V : The lines spread apart on the right side and come
together on the left side while the center remains
unmoved.
v : The lines spread apart on the left side and come
together on the right side while the center remains
unmoved.
4
Adjust the distortion as illustrated below with the v and V keys.
In position No. 1 of green adjustment, the green, red and blue lines
move together by pressing the v or V key.
V : The ends of the top and bottom lines spread apart
while the center remains unmoved.
v : The ends of the top and bottom lines come
together while the center remains unmoved.
5
Repeat steps 1 to 4 until the horizontal lines become parallel to the
screen edges.
101
Adjustments