NEC MultiSync LT280 LCD Projector Logo
Posted on Dec 30, 2009
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Nec lt380 changed lamp for new one still doesnt work?

1 Answer

Richard C Cohen

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  • Expert 171 Answers
  • Posted on Dec 30, 2009
Richard C Cohen
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Joined: Mar 23, 2008
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If the unit is powering up but the lamp is not igniting, most likely there is a problem with the ballast.(Ballast is the circuit that starts and then maintains lamp current) When starting the projector, it is sometimes possible to look directly into the lens and see small "lightning" flashes. This is the high voltage ignition current trying to start an electrical arc in the lamp. You can also hear a "clicking" sound--same thing. If the ballast is defective, the unit must be repaired at a facility--send it in directly--not through a store. If the unit is totally dead(no lights at all), there usually is a main fuse located near the power cord(inside the unit) that blows. If you've never had tech training, don't attempt to open the unit--it is very easy to accidentally damage components unless you know exactly how to remove the top cover.

  • mshorney Jan 11, 2011

    Hello Mastertech48,

    I have the same NEC unit and i am trying to determine what ballast you mean. This projector is a bit of a project for me so I have it apart and cannot identify and capacitors with a blown top and your reference to a ballast for the ignition of the lamp is a bit confusing. Can you identiify a part at from an online store? I have ordered lots from alliedelec dot com. Please pm me at m shorney at hotmail dot com no spaces or underscores.

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I have an NEC LT380 projector just changed bulb but, now it powers on then back off and i get 6 flashes on the status light. Any help would be great since this model is no longer made.

http://www.nec-pj.com/dl_data/lt380_manual_e.pdf

Scroll to page 107 and read through the various light blinking codes. This will help you figure out exactly what the blinking light error is and what steps are needed to correct it. If you are still having trouble please respond with further information for more in depth troubleshooting.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/thomas_e8f475a8655f7b4a

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As long as you are the legit owner NEC or the dealer you bought it from can give you a release key.
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There is a small cover plate, about 3"X6", that 'just' snaps off. You might have to use a small screw driver to pry it open. The bulb can then be pulled out. Align the new bulb and press it down into the socket. Be careful not to touch the bulb with your hands; use gloves or a lint free cloth.
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