Mitsubishi Electric LC62 CHASSIS XL6500LU, Руководство по обслуживанию

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CRITERIA OF THE DEFECT PIXEL ON THE LCD PANEL (FOR REFERENCE PURPOSE)
1. Necessary Tools
• This projector
• Personal computer (PC)
• RS-232C cable (attachment)
• RGB dot pattern
• ND Filter (1.5 %, 2.5 %, 5 %)
2. Pixel Defects
Test Conditions
Projection conditions : 40 ± 0.5 inches, Maximum zooming (The Zoom Ring is fully turned to the WIDE.)
Projection distance : Approx. 1.5m
Test signal : Full white signal and full black signal (internal or external)
Test point : Full screen
Image quality : Default
Test start : Two minutes after the lamp turned ON.
Projector positioning : Floor-mounted on a level surface with an inclination within ±5 degrees
Ambient illumination : 5 lx or less at the test point
Test tools positioning : Vertical positioning
Other conditions : The components that have direct effect on the brightness, such as the projection lens, shall be free
from dirt and dust.
Defect Type
White defect : The transmittance of a pixel is 5 % or more of the saturated white when a full black image is pro-
jected. Occurrence of this defect in two adjoining pixels shall be rejected.
White spot : The transmittance of a pixel is 2.5 % or more but less then 5 % of the saturated white when a full
black image is projected. Occurrence of this defect in two adjoining pixels shall be rejected.
Negligible white defect : For the red and blue LCD panels, the transmittance of a pixel is less than 2.5 % of the saturated
white when a full black image is projected. For the green LCD panel, the transmittance of a pixel is
1.5 % or more but less than 2.5 % of the saturated white when a full black image is projected.
Black defect : A pixel doesn’t transmit the light at all when a full white image is projected.
Pixel short cut : When an image consisting of vertical or horizontal black and white lines having a width of one pixel
is projected, a pixel on a black line transmits the light or a pixel on a white line blocks the light.
(Pixel short cut is a defect that a pixel wrongly transmits the light when the adjoining pixels are
transmitting the light or that a pixel wrongly blocks the light when the adjoining pixels are blocking
the light.)
Pixel short cut
The light is being blocked.
The light is being transmitted.
Note1: These criteria are intended to define the factory shipping criteria, not to guarantee the product.