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I have a philips projector model lc4433. I need a part but I am not sure what it is called . It is part of the prism system. It is one of the small prism's/mirrors . There is a set of 3 on a mount behind the lens. Can you assist me in identifing the part and sourcing a replacement ?

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These parts are fixed during production and are not individually replaceable parts. The entire prism assembly needs to be replaced. This is an unusual repair request though. Why do you think this needs to be replaced? Is it physically damaged? If so, there will be additional convergence adjustments and alignments that will need to be done as well. This will require somewhat specialized test equipment to perform. This unit should be sent in for service.

Dan

Posted on Jan 29, 2009

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How do I get rid of the dark shadow across the top of the screen?


This is actually a fairly common issue with the NEC projectors, especially if they are mounted from the ceiling (upside down). The problem is the compartment immediately after the bulb. What happens is the 'paste' they use to adhere the glass prisms to it's plastic component wears off overtime due to the immense heat from the bulb being projected onto it. The glass prism piece ends up leaning against the bulb compartment creating the annoying 'shadow'.

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Hi,

Unfortunately, the value of projectors drop quickly after the production run ends. You will most likely find that the price of the blue prism will be higher than a comparibe working projector of the same model on ebay. I have a Panasonic PT-AE 900U, 1100 lumens 720P 5500 contrast. To replace the main board (if you can find it) cost over $700 from a supplier. The same projector used are going for $300 - $500 in working condition on ebay. I just bought another one and it gets a great picture plus I have a second bulb as a backup with a few hundred hours left on it. I still haven't thrown away the ailing projector in hopes of someday finding a cheap one for sale with a good mainboard and a problem else where. Now I can afford to wait for one to become available.

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