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How do you tell if the color wheel or the cooling fan is out

When my tv went out I pulled the lamp, the lamp has no glass shards and it look like the little copper wire is still hooked to the filament. Before the TV went out it made a whirling sound, and the picture went black. When turned on the picture remains off and there is a loud whirling sound. Is it the color wheel or fan

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That would be the color wheel. They range from $150-$600. That sounds like the whole light engine could have went out. They can be rebuilt for around 750-1000 bucks.

Posted on Jan 13, 2009

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I want to buy a pair of 3D glasses,which brand do you think is better?

There should be a part number in your owners manual that will be compatible with your TV

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Projector keeps switching itself OFF

The projector is probably overheating you need to check fans and lamp inside

May 28, 2008 | Home Theater Systems


Kitchen Table Investigation, Projection Lamp, Course 101

Mercury Vapor lamp... how does it work? How do you know when it's bad? I'll try to shed some light on this topic. *Caution: material for the curious follows.

First, let's cover the basics: How it works.

A Mercury Vapor is a mix of electro-chemical and some mechanical ingenuity. Although some may not agree with me, I will state my case anyway. The lamp has a few basic parts. The reflector, which we all see, is used to direct the light in the intended direction... forward. Within the reflector, we have the actual bulb. The bulb contains the burner, mercury, and a fluorescent element. The width of the burner gap is critical for initial and sustained ignition of the lamp.

When your turn on your projection TV, a power supply devoted to the lamp (known as a ballast) passed about 300+ volts of high energy electricity through the lamp, but only for a few seconds. This energy arcs across the burner and vaporizes the Mercury. With the Mercury vaporized, the mercury is now free to move around within the bulb. The power supply then switches into a driving mode and begins feeding about 10,000+ volts at a lower energy. This allows the arcing between the burner gap to continue. The mercury, which is excited by all the electrical activity, begins to slam into the florescent element. In turn, the element glows brightly.

So, that's basically how it works... but what you don't see is the damage. At one time or another, we have all plugged something into the wall and POW... sparks fly. If you had looked close at the plug, you may have noticed some pitting or damage from the spark. This is an electrical arc. The same thing is happening inside your lamp, on a smaller scale. Each high energy ignition causes material to be worn away from the burner. The lost material builds up as contamination within the bulb and the loss of material causes the width of the burner gap to grow.

Some maybe wondering... "Is there a secret formula for extending my lamp's life?" The short answer is: "Stop watching it." The long answer is: Never leave your TV on when you are not watching it; Allow your lamp time to cool before turning it back on (5 minutes to be safe); Allow your lamp to reach it's optimal temperature before turning it off (20 minutes to be safe).

Now that we have that mess cleared up, on to the discovery section of this article: "How can I tell if my lamp is bad?"

Well, in most cases, there are warning signs: Picture is getting much darker; Seems fine at first, but then goes out and comes back on in a moment; Turns off after a period of time or doesn't light at all; I heard a loud pop. All of these are classic warnings or indicators that your lamp may need some attention.

You should allow your TV is cool for about 20 minutes and pull out wall plug and then remove the lamp for inspection. You will need a well lit area to get a good look at it. Do a once over: Did the bulb burst; Does it look smoked up? If it looks good, have a glance at the base of the burner:


Does it have a smokey mark on one side? This is the contamination from the burner gap. This contamination builds up throughout the life cycle of the lamp. As the burner gap grows, the lamp resists the electricity that is be pushed to it to make it burn. This resistance creates heat. Some lamps will create so much heat that the glass surrounding the burner will begin to melt and swell. You may look into your lamp and see a big silvery blob protruding from this area. These are all clear indicators of trouble in the works.

Unfortunately, some lamp show no visual signs at all... for these, you can only replace them and hold your breathe.

I hope you are able to use this information to better guide your lamp purchasing decisions. Let me know it this was helpful.

on Mar 18, 2010 | Home Theater Systems

1 Answer

Jvc x3 projector orange lamp light flashes wont power up

1,Check the fans ,if the fan is running
2,Inductor (Sensing element),near the Color Wheel. Use a cotton swab moistened with alcohol to wipe the Inductor.
Have a good day!
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Tel: +86 131788 67858

Nov 02, 2013 | JVC Dla X3 3d Projector

1 Answer

How do I know if the lamp is out or the color wheel

If the lamp is blown out, you will see shards of glass floating around in the bulb. The wires that connect to the glass element in the center will be "disconnected". If the set is less than a year old the bulb is under warranty. All you will have to do is contat the people that sold you the televison and tell them the bulb is blown and do a warranty claim. Good luck!

Jan 13, 2009 | Samsung HTQ45 System

1 Answer

Runco Cl 610 keeps shutting down

on the cl-610 it would shut down after about 5 minutes of well as having to replace the customers bulb. so I took a look at the cooling system there are two fans which work fine, but there is a type of vent inside attached to the body of the projector it seems to have some back pressure if my words are right causing the fans to return the heated air back into the projector forcing the fast shutdown and lessening the life of the bulb. so as a test I removed the directional vent and I blew into it and most of the air came back rather that went out so I left it out and the projector has been running flawless for the last two days. might be time for a redesign on that directional vent cover. but check it for yourself first. if this has helpped please let me know.

Nov 27, 2008 | Home Theater Systems

1 Answer

Sony tv blinking standby and does not turn on

more than likely the door is not closed properly. remove the door and check it for warping and discoloration, if it is replace the door and clean the siraco fan above the lamp you must remove the light engine to get to it. this is a known problem and there is a fix to keep this from hapening agian call an authorized sony repair to have this done.

Apr 25, 2008 | Sony DAV-C770 System

1 Answer

Optoma EP745 Will not turn on

Got mine to turn on even without the color wheel. The trick is to place the new lamp in and screw down all screws. When replacing the cover besure that the protruding plastic enters on the correct side of the wire switch in side. Tighten the lamp cover screws and do CPR on the center of the cover to ensure the wire switch has moved to the on position below the cover. Plug in the power to see if it works. If not, do CPR with your thumbs on the center of the lamp cover again. Usually this will fix it.

Oct 31, 2007 | Home Theater Systems

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