How Do DLP TVs Work?

I’ve been getting a lot of questions about how DLP Televisions work. To answer this question, I’ve decided to draw a little diagram and perhaps this will enlighten some folks out there!

The three things that typically go out on a television are the lamp, the ballast, and the color wheel. You can see the parts above and hopefully by reading our website, you’ll be able to troubleshoot your own DLP television woes. If not, you should call a trained servicer or a service center that handles these kinds of delicate repairs. Changing lamps is one thing, but when you get into the ballast or color wheel, it gets a bit more complicated–I know first hand from working with my dad on DLP TVs.

Stay tuned, and I’ll be posting some YouTube vids of me working on some of the TVs you’ll probably encounter as a servicer/technicial, or maybe you’re just an ordinary person who’s feeling up to the challenge.


  1. Steve Jones

    I wish you guys did more art work like this…It really helps clarify how things work! Great site, keep up the great work!!!

  2. The only thing I would add to this photo description is the fact that the rear projection TV actually bounce the image off a mirror on the back of the TV, then it is projected to the screen. That’s why there’s that little hump on all the rear projection DLP and LCD TVs šŸ˜‰

    Great artwork…It would be nice to see more illustrations like this on the site!

  3. Charles La Macchia

    I purchased a lamp and a ballast from you and the wires on the ballast are not long enough to work on my rca. your info on your website states these parts will work on any set with a phillips 132/120 lamp. After connecting all parts the tv does not light up.


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