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B
﹒
INSTRUMENT ALIGNMENT
﹒
1.
Defection
Presets
﹒
Control
pots
VR403
﹑
Focus VR are set at middle point. Screen
﹐
set to min
﹒
2.
Power
Supply
Alignment
﹒
2.1
Input
VGA
(
480
)
signal cross-hatch pattern & beam current set at 0µA
﹒
2.2 Adjust VR101 until TP201 = 80V
±
0.3V
﹒
2.3 Adjust VR403 until voltage at TP208 = 55 + 0.3 V.
3.
Size & Geometry Adjustment
﹒
3.1
Raster
Centering
﹒
3.1.1
Input cross hatch pattern at 94KHz mode
﹒
3.1.2
Adjust screen just raster visible
﹒
3.1.3
Adjust VR401 to center raster on screen such that the horizontal
distance
from
the
midpoint
of the left display edge to the
left bezel edge is within 2mm of the distance from
the
midpoint
of
the right display edge to the right bezel edge
﹒
3.2
Picture
Size
﹒
Input mode 1~13 signal adjust V-size
﹐
H-size to achieve
﹒
H-SIZE
:
352mm
±
4mm
V-SIZE
:
264mm
±
4mm
3.3
Picture
Centering
﹒
Input
mode
1~13
adjust
V-position
﹐
H-position such that the picture is centered with the screen
﹒
Bezel
Picture
D
A
B
C
lA – Bl < 4mm
lC – Dl < 4mm
A
B
Bezel
Raster
A-B 2mm
352mm
264mm
Picture
Bezel
34
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
G90f/B-3
Summary of Contents for G90f/B-3
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