ViewSonic VP201b-1 Service Manual page 10

D. Image test
1. Picture size & position.
1.1 Picture size.
Input analog timing modes 1 ~28 and DVI timing modes 1 ~ 28:
H-size: 408mm ± 1mm.
V-size: 306mm ± 1mm.
(Extra 640x350)
1.2 Screen center.
a. 1600x1200: H ± 1mm, V ± 1mm.
b. Other modes: H ± 1.5mm, V ± 1mm.
1.3 Picture position (refer to FIG.2).
H-position: ︱ g3-g4 ︱ ≦ 1.5mm.
V-position: ︱ g1-g2 ︱ ≦ 1.5mm.
2. Luminance test.
2.1 Input a 1600x1200 / 60Hz full white pattern at 100IRE with brightness set to 100% and contrast set to
70%.
Color temperature
sRGB
9300K
6500K
5400K
5000K
2.2 Input a1600x1200 / 60Hz full white pattern at 100IRE with brightness set to 100% and contrast set to
100%.
Color temperature
9300K
6500K
5400K
5000K
3. Picture performance test.
3.1 Picture quality:
Test pattern signal
1 100IRE white raster pattern
2 Cross hatch pattern
3 Color bar
4 Gray scale (16 steps)
5 1 dot ON / 1 dot OFF pattern
6 40IRE gray raster
3.2 DVI performance test.
3.2.1 Test equipment:
a. VG828 digital pattern generator.
b. "TTL" DVI-D single link cable.
3.2.2 Test conditions:
a. Resolution: 1600x1200; refresh rate: 75KHz vertical / 60Hz horizontal.
b. 16, 32, 64, and 256-level horizontal gray scales..
c. 16, 32, 64, and 256-level vertical gray scales..
ViewSonic Corporation
g3
x y
0.313 ± 0.01 0.329 ± 0.01
0.283 ± 0.01 0.298 ± 0.01
0.313 ± 0.01 0.329 ± 0.01
0.335 ± 0.01 0.350 ± 0.01
0.346 ± 0.01 0.359 ± 0.01
Y (Luminance)
Analog DVI
>220 nit >220 nit
>220 nit >220 nit
>220 nit >220 nit
>220 nit >220 nit
The following image faults shall not be conspicuous:
Seam, Noise, Beat, Flicker
Ringing, Overshoot, Smear, V-jitter, H-jitter
Color distortion, Noise, Beat, Color tangent
Noise, Beat, Gamma distortion
Noise, Flicker
Noise, Beat, Gamma distortion
7
g1
g2
408mm
FIG. 2
Y (Luminance)
Analog
>200 nit >200 nit
>150 nit >150 nit
>200 nit >200 nit
>180 nit >180 nit
>180 nit >180 nit
Confidential - Do Not Copy
306mm
g4
DVI
VP201b/s-1