Tip & How-To about Televison & Video
When loud noises start emanating from your DLP TV you probably need a new color wheel. They are not that hard to change but require a very careful touch and a very conciencious technician.
Any parts you need should be able to be obtained from http://www.encompass.com . They are a large parts distributor and represent just about every brand on the market as well as having good prices. Another good parts distributor is http://www.shopjimmy.com . Both are reputable and safe to use.
Color wheel technology is actually from the 1930's but has a modern hi-tech execution. Here is the process. Disconnect the power. Remove the lamp assembly by removing the lamp door then the lamp module. Remove the screws holding the lower back on the set. This will expose the main board and the light engine assembly.
Every set is different from here forward but generally you will have to remove any screws holding the boards in the chassis, perhaps some frame work within the set (at the rear), any fans which will be in the way and all wires going to and from the light engine.
Before removing any wires come up with a labeling scheme to make it easier to reassemble the unit correctly. You can use a label maker or a black sharpie. Mark each half of any wiring connectors (male and female). Take pictures with a digital camera as you disassemble various stages. This will be helpful later to figure out which parts go in first and where they should go.
Remove all screws holding in the boards and the engine assembly. The optical engine is usually centered in the unit and will have the lense up through a black piece of felt. The unit will slide out of that position when necessary.
When the light engine is removed look at the lamp end and you will see the color wheel inside. Determine what screws and covers need removed. Every unit is a little different but it should be intuitive. Usually it involves about 4 to 6 screws around the perimeter of the color wheel. The wires for the color wheel will have to be removed also. There will probably be a normal white connector (could be black) with two wires (red and black) for power and a thin film ribbon cable to carrie the signals. Be very careful with the thin film cable and note how it is attached. Usually they push into a socket. They must be inserted one way only. Do not reverse the foil side or you will be taking the set apart twice to correct this.
Take all screws that hold the color wheel in, out. Install the new color wheel being careful not to get any dirt or smudges on the wheel. Wearing protective gloves is a good idea. Reverse the disassemble procedure and reassemble your unit being particularly careful with the thin film cable. Reinstall the light engine when you are ready. Check and recheck that all connectors are reconnected before moving on. Look at your pictures if in doubt. Don't try doing the procedure from memory.
If you did not forget any wires and did the procedure properly your unit should be good to go. Samsung has the weakest color wheels and they fail on a regular basis, within about 3 years on average.
This would also be a great tiime to clean the lense assembly. Do this while the optical engine is removed from the TV chassis and after you have installed the new color wheel. Using a lint free cloth (diapers are great) spray some window or household cleaner, without ammonia, onto the cloth (away from the unit) and using a swirling motion clean and shine the lense assembly. Don't get too forceful or carried away. You do not want to scratch the lense assembly. This will make the picture look much sharper and brighter.
Congratulations on your color wheel replacement.
Thanks for using FixYa and the great rating.
Posted by Kim... on
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