Service manual

ViewSonic Corporation Confidential - Do Not Copy Q9b-2
18
b. Specification: Native only
(1) ≧200 cd/㎡
3.10 Black Level
a. Gray Scale Condition Input signal: 32 Gray scale (Primary mode)
Controls : CONT./BRT. primary setting, other shipping setting
condition.
b. Specification：Native (1) The first bar from black of gray scale pattern shall be cut off.
(2) The last bar from the bright of gray scale pattern shall be
discrimination.
3.11 Picture Quality
a. Condition BRT : MIN. ~ MAX.
CONT : MIN. ~ MAX.
*Inspection of picture quality shall be made at the distance of 50 cm in front of LCD surface.
b. Full White Signal
Condition : Input signal – Full white signal
Specification: The following electrical defects shall not be so conspicuous.
(ITU-R 4.5 or better in primary mode, and ITU-R 4.0 or better in other modes)
(2) ringing, seam, etc.
(3) flicker, noise, beat, etc.
(4) shading, etc.
(5) saturation of video power supply, etc.
c. Inverted Crosshatch Signal
Condition : Input signal – Inverted crosshatch signal
Specification: Following electrical defects shall not be so conspicuous.
(ITU-R 4.5 or better in primary mode, and ITU-R 4.0 or better in other modes)
(1) video ringing, over shoot, smear, etc.
(2) vertical jitter, horizontal jitter, picture vibration, etc.
d. Gray Scale Signal
Condition : Input signal – Gray scale signal
Specification: Following electrical defects shall not be so conspicuous.
(ITU-R 4.5 or better in primary mode, and ITU-R 4.0 or better in other modes)
(1) Oscillation, noise, beat, shading, etc.