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Appearance
1 to 3mm diameter of surrounding boundary is
seen clear at white picture, and is more of a
Screen dust
polygon than circle. (It's the same with the
shape of dust)
It is found well from white 40 to 80% as cyan,
yellow, or magenta color etc, and has the 8 to
20mm circle of shape with unclear boundary.
Engine dust
Water drop shape is displayed on a white
picture, and its surrounding boundary is a little
Bad Mirror Shape
cloudy.
Mirror or Screen
Various shapes are displayed with a cloudy
contamination
surrounding boundary in a white picture.
The white picture is very big and black is the
Bad Uniformity
main color found compared to other colors.
Contamination of
A big light pink spot is found in the white
transmitting Lens
picture.
A wave shape is found in the white picture.
Bad transmitting Lens
Cause
It is caused by dust stuck to the screen inside the
set, caused by static electricity.
A minute dust on the polarizer or panel part of the
engine sticks to one channel among red, green, blue,
and is displayed with its size 60 times increased. The
diameter of dust stuck to a panel part is displayed a
smaller while it is bigger on polarizer.
Dust stuck to a panel is found red, green, blue color,
etc at the same location of black picture.
Reflection image is displayed on the screen due to
light distorted by a pin hole or bad shape on the
reflection side of the mirror.
It is displayed on screen in case mirror or
screen inside is contaminated.
Dust located in the engine lighting system is
blocking the lighting.
It is caused by contamination due to fingerprint
on the surface of the transmitting lens, etc.
It is caused by a scratch on the surface of the
transmitting lens.
Countermeasure
Remove the dust on the screen.
1.Remove dust by discharging high
pressure of air to the filter of the engine.
2.Remove dust with air pump for lens
cleaning after removing cover-lens.
3.Replace engine.
Replace mirror.
Clean Mirror or Screen.
Replace engine.
Clean transmitting lens.
Replace engine.
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