Question about Samsung DLP HL-P5663W 56" TV

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Verticle black stripe

I have a black stripe running vertically on the left side of my screen. The bulb has been replaced but the stripe is still there. Any suggestions?

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The most likely cause is a light tunnel issue. There is a small metal device shaped like a cylinder about 5/8 inch diameter by about 1-1/2 inch long that contains 4 small mirrors arranged so there is a rectangular light tunnel through the cylinder. The light coming from the color wheel passes through this tunnel and it shapes the beam in the right shape to be directed at the imaging chip. If one or more of these mirrors does not stay in place it can cause a shadow on an edge of the screen.

The mirrors are held in place inside the metal cylinder with a couple of springs around the cylinder and also by glue or plastic material between the cylinders metal walls and the mirrors. The simplest way to fix it is to replace this light tunnel with a new one. The cylinder can be replaced in the wrong orientation and it can then interfere with the color wheel causing it to be damaged. If someone is good with fine detail they can carefully move two of the mirrors toward each other, insert a little super glue between the mirrors and the metal wall and then move these mirrors to the walls so they are again in the right position.

The process for gaining access to the light tunnels involves removing screws holding the electronics modules in the TV so they can be separated from the TV. The lamp assembly, cooling fan assembly and color wheel can be removed so the projector parts can be removed. The light tunnel has a cover over it that can be removed so the light tunnel can the be removed to be worked on.

Learning how to do this takes a lot of patience, mechanical inclination and risk. I was successful but not all are.

There are other descriptions of this issue that provide similar information so your might want to look for them and study them before deciding to do surgery or not.

Good luck!

Posted on Jan 14, 2013

Its your light tunnel

Posted on Aug 05, 2008

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