Question about NEC VT460 Multimedia Projector

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Blub brightness has dimmed.

The projector has 87% bulb life left, however it is so dim that you can barely read the screen. The various brightness sections in the projector menu don't make a big enough differance. Another projector with the same usage is signifcantly brighter.

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Re: Blub brightness has dimmed.


Replace the Lamp unit is the best solution. that will cost you around $450.


Posted on Nov 27, 2007

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2 Epson 3LDC projectors. Very dim. One has a new bulb and the other has over 600 hours left on it. I've looked at the bright and contrast in the menu but, they are set appropriately. All the lights...

Check the intensity of ligh that emits from the lamp. If it is very weak that noral as it should be, the fault you describe here will occur. If it seems to be very dim, we have to suspect its inverter secion, which supply voltage to the bulb. Actually this is a ver skilled job and should be done by any experienced service technician or by the authorised service center for Epson at your town. OK.

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My projector has gone completely blurry and extremely dim. I have no idea what's caused it. It still seems to be able to project the right colors...just very dim and blurry. Is it the bulb (my bulb has...

either the optical parts close to the lamp are getting old and heat affected, or the focus lens system is dirty etc.

switch off the unit and disconnect the power.

remove the lamp. remove the cover off the whole projector.

get a 50w halogen lamp (like in the ceiling of the house) and connect it to a 12v supply.
Then carefully put it into the cavity where the lamp normally goes. and shine it in the direction that the lamp normally shines. be carefull not to burn yourself and the bits inside.

check the strength of the light as it goes through the various sections of the optical path.
see where the brightness seems to drop right off. see if there is any components that seem to degrade the light strength.

this may give you a clue as to where the problem lies. you can then decide what the next step is.
tell us how you go.

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2 Answers

What is the lamp life on a sanyo plv-z2 bulb and how to read the bulb life there are 3 numbers that come up when i check it

If I remember correctly, you hold down either the power or the menu button for 30 seconds... I believe it is the power button, and it will briefly display it on the screen, but this assumes it was reset at the time the lamp was installed. The counter counts up on this model, and the lamp replace light will come on at 3000 hours. I have 2 of these units, and I have gotten at least 5000 hours out of each lamp. Toward the end of the lamp life, it may start getting dim and/or have difficulty starting, but I probably wouldn't replace it until you either notice the dimming or the lamp fails, although I've heard some say they can damage the projector when they fail, I have not had any problems.

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You can adjust the brightness through the user menu, under the picture option. You might want to look at your bulb. It might be time to replace the lamp.

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on my XU 55 the trick to read the lamp hours is to press and hold down the power button in about 20 seconds when the projector is turned on. there will come a window in the upper left corner that tells about total hours and lamp hours. the window will disappear quite fast, so one might need to do it twice.

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I have changed the bulb on my LG projector recently. I found the rotating colour wheel to be full of dust. Upon opening the cavity where the light is redirected and reflected onto the imager, I saw all mirrors also had a layer of dust. I don't think it was so dirty that it affected the brightness of the image, but I cleaned it anyway using an earbud. I cleaned both sides of the color wheel as well. You need to be careful in working with the optics of the projector!

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