Sony VPH-G90E, Service Manual

Page: 89 / 546

1-79
VPH-G90E/G90U/G90M
96
Adjustments
Adjustments
Adjusting the Registration
a
b
a
b
2
Green SIZE and LIN (linearity) adjustment
Adjust the picture size with respect to the screen, and the picture’s up,
down, left and right balance.
1
Press the LIN key.
The CROSS HAIR pattern appears.
You can also change to the 9
×
9 HATCH pattern by pressing the
PATTERN key.
2
Press the ADJ G key.
Pay attention only to the encircled portions illustrated on the left.
3
Reset the FINE linearity data.
See “Resetting the Data” on page 138.
4
Adjust with the B and b keys until parts (
a
) (distances from the right
and left ends of the screen to the first vertical lines) are of equal length.
B
:The left and right vertical lines are shifted to the
left while the vertical center line remains
unmoved.
b :The left and right vertical lines are shifted to the
right while the vertical center line remains
unmoved.
5
Press the SIZE key.
6
Reset the FINE size data.
See “Resetting the Data” on page 138.
7
Adjust with the
B
and
b
keys until parts (
a
) on the left and right are
15 to 20 mm long.
B
:The horizontal scale is reduced.
b :The horizontal scale is expanded.
Adjustments
97
Adjustments
8
If they are not aligned, press the LIN key or the SIZE key and repeat
the adjustment by pressing the
B or b key.
Each time you press the LINE or SIZE key, the COARSE mode and
FINE mode are selected alternately, and you can use the two modes
appropriately. The adjustment data is stored for each mode separately.
While you hold down the arrow key in the FINE mode, “f” is
displayed around the adjustment position.
9
If the CROSS HAIR pattern is off-centered on the screen, adjust the
centering again and repeat steps
1
to
8
for the horizontal scale
adjustment.
For details of the centering adjustment, see “Green CENT
(centering)
adjustment” on page 95 .
10
Press the LIN key.
11
Adjust with the V and v keys until parts (
b
on page 96
) (distances
from the top and bottom ends of the screen to the first horizontal lines)
are of equal length.
V : The upper and lower horizontal lines are shifted
upward while the horizontal center line remains
unmoved.
v
: The upper and lower horizontal lines are shifted
downward while the horizontal center line remains
unmoved.
12
Press the SIZE key.
13
Adjust with the V and v keys until parts (
b
) at the top and bottom are
about 15 to 20 mm long.
V : The vertical scale is expanded.
v : The vertical scale is reduced.
14
If they are not aligned, repeat steps 10 to 13 .
15
If the CROSS HAIR pattern is off-centered on the screen, adjust the
centering again and then repeat steps
10
to
14
for the vertical scale
adjustment.
For details of the centering adjustment, see “Green CENT (centering)
adjustment” on page 95.