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Are all lamp the same?

post #1 of 6
4/7/08 at 8:20pm
Thread Starter 
I don't know much about lamp but It seem to me that a 250watts projector lamp should be equal with another 250watts lamp. For exemple the Sharp XV-Z10000 and the XV-Z12000 are both 270watts SHP lamp can one be fitted in the other?

Another question. What does SHP stand for. for exemple the Sharp XV-Z9000 as a 250 NSH lamp. What is the difference between an SHP and NSH lamp?

One last question. My Sharp XV-Z20000 use a 220 watts lamp. What append if I retro fit a Sharp XV-Z9000 lamp? Can that be done? What append if I install a 250watts in a projector conceive to handle a 220watts lamp?

Thanks!
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post #2 of 6
4/7/08 at 10:06pm
yes of course you can retrofit a lamp. you could probably put a different engine in a honda accord too but why? do you want to spend endless hours redesigning the projector just to find out it was designed for a specific lamp?

just buy a different projector unless you think you're Dr Frankenstein
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post #3 of 6
4/8/08 at 1:20pm
Thread Starter 
Quote:
Originally Posted by Tryg View Post

yes of course you can retrofit a lamp. you could probably put a different engine in a honda accord too but why? do you want to spend endless hours redesigning the projector just to find out it was designed for a specific lamp?

just buy a different projector unless you think you're Dr Frankenstein

I'm not comparing apples and oranges. For example the Sharp XV-z10000 and XV-Z12000 seem to have the same 270 watts lamp but they have two differents lamps number. Maybe someone here that own both projectors can tell me if there was a visual difference between the lamps or just the housing was different. My friend who own a H77 bought a lamp for 125$ without any housing and was able to use his old housing. He told me it was very easy to install and even anyone could have done it... I can't beleive lamp manufacturers build different lamps for each projector model. Economy of scale should apply here.

But thanks for your valuable input.

Bruno
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post #4 of 6
4/8/08 at 2:54pm
Quote:
Originally Posted by reio-ta View Post

The problem with doing that is you can't install it perfectly. The old housing's reflector gets burnt up a bit and won't work as well. The regulation circuitry inside the housing is only meant for one bulb cycle for each lamp housing used. So you:

1) Color fidelity will be compromised from melted, browned, etc reflector.
2) The housing isn't working as new. It will cause the lamp to not function the same, and can and probably will not last as long, making the lamp die prematurely.

It's all part of the manufacturer's plan to make your projector die faster so you need a replacement sooner. Sure they could add a few hundred dollars to the design of the projector and make it last two, three or more times longer per lamp. But why will they do that when you have no other choice? Make it as cheap as possible and charge as much as they can.

When you buy a bare replacement lamp asembly, it should include the reflector. The only thing you do reuse is the projector housing or mounting frame and connector.

Also there is no "regulation circuitry" on any lamp module I ever saw; That's not to say nobody does because it's it quite possible there is.

However as long as the raw lamp and reflector are the same part number, then you can save some money by swapping the housing. That said, unless the generic lamp part number is there and not some part number by the projector manufacture, you cane never be sure. if say Sharp buys 20,000 lamps at a time, they can get the OEM to print what ever they want on the lamp thus making it difficult to second source.

There are easily over a thousand different OEM UHP lamp made so unless your are dead sure, I would be very careful with OEM lamps.
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post #5 of 6
4/8/08 at 5:23pm
I have been swapping lamps for years without ill effects. Two major manufacturers: Phillips and Osram. I'd say they cover 90% of the market and more. The whole BS that lamps are unique to a specified projector is probably perpetuated to discourage people from tweaking and messing around with high voltage items. Anyways, most 250W lamps are interchangeable, I am currently running my 1080p Benq on an Optoma H77 Phillips lamp even though Benq has been using Osram for years. Sharp uses larger reflector, older 270W lamps in the XV-12K,10K series pj's SHP type. I would not mix SHP with UHP, but you would not be able to anyways due to size difference. Anyway, you can PM me if you need more details, but the whole taboo around lamps is just that.
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post #6 of 6
4/8/08 at 8:22pm
Thread Starter 
Any trick to find out what would be similar? What is the difference between SHP and UHP? What about NSH?

You have a link for me were I can learn more on the subject? Or even better a link that says what is compatible with what?
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