Alignment and Adjustments
Samsung Electronics 1-7
2) Types
Screen dust
Engine dust
Mirror or Screen
contamination
Bad Mirror Shape
Bad Uniformity
Contamination of
transmitting Lens
Bad transmitting Lens
Appearance
Cause
Countermeasure
1 to 3mm diameter of surrounding boundary is
seen clear at white picture, and is more of a
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.
Water drop shape is displayed on a white
picture, and its surrounding boundary is a little
cloudy.
Various shapes are displayed with a cloudy
surrounding boundary in a white picture.
The white picture is very big and black is the
main color found compared to other colors.
A big light pink spot is found in the white
picture.
A wave shape is found in the white picture.
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.
Replace engine.
Clean transmitting lens.
Dust located in the engine lighting system is
blocking the lighting.
Replace engine.
It is displayed on screen in case mirror or
screen inside is contaminated.
Clean Mirror or Screen.
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.
Replace mirror.
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.
Remove the dust on the screen.