Author Topic: Extreme teardown - $42,000 NEC projector  (Read 6714 times)

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Offline mikeselectricstuffTopic starter

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Extreme teardown - $42,000 NEC projector
« on: June 14, 2011, 11:37:17 pm »
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Offline thmjpr

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Re: Extreme teardown - $42,000 NEC projector
« Reply #1 on: June 15, 2011, 04:10:20 am »
wow, excellent video.

I wonder how much of an impact the loss of the black anodizing has on UV output. Aluminum should be quite a good reflector of UV light.
 

Offline mikeselectricstuffTopic starter

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Re: Extreme teardown - $42,000 NEC projector
« Reply #2 on: June 15, 2011, 10:27:31 pm »
wow, excellent video.

I wonder how much of an impact the loss of the black anodizing has on UV output. Aluminum should be quite a good reflector of UV light.
Can't see it being significant as it's still a matte surface so would diffuse in all directions, and much of the diffuse reflected light would bounce off the back of the mirror.
 
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Offline saturation

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Re: Extreme teardown - $42,000 NEC projector
« Reply #3 on: June 16, 2011, 02:07:22 pm »
Nice!  Thanks for taking the time out for it.  What do you intend to do with it, cannibalize its probably very high quality or parts or put it into some working order?

For interested viewers:

http://www.projectorcentral.com/NEC-Nighthawk_XT5000.htm

http://www.projectorcentral.com/news_story_167.htm


Around 2000 this projector reminds of the first flat screen TVs 42" diameter, averaging $10k each for no more than 720p, which you can get these days for under $500.


Best Wishes,

 Saturation
 

Offline firewalker

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Re: Extreme teardown - $42,000 NEC projector
« Reply #4 on: June 16, 2011, 08:55:13 pm »
I always wanted to take apart one of those beasts.

I swear I could smell it while you was taking it apart!!!  :P :P :P
Become a realist, stay a dreamer.

 

Offline mikeselectricstuffTopic starter

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Re: Extreme teardown - $42,000 NEC projector
« Reply #5 on: June 16, 2011, 09:34:19 pm »
I always wanted to take apart one of those beasts.
I swear I could smell it while you was taking it apart!!!  :P :P :P
mmm.. stale cigarette smoke....
Quote
What do you intend to do with it, cannibalize its probably very high quality or parts or put it into some working order?

I got 2 complete units and a couple that had some parts missing. I now have one complete unit, lots of bits and enough scrap aluminium to recoup what I paid for all four ;D
I'll probably keep the complete unit in case I ever stumble on a lamp that I can bodge into it. Or hack the eeprom and run it til the lamp blows up.
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
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Offline firewalker

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Re: Extreme teardown - $42,000 NEC projector
« Reply #6 on: June 16, 2011, 09:42:55 pm »
Did you managed to work out how the system knows about the lamp? Let say you buy a new one. Is there any communication with the lamp module?
Become a realist, stay a dreamer.

 

Offline The1

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Re: Extreme teardown - $42,000 NEC projector
« Reply #7 on: June 16, 2011, 10:16:19 pm »
Looks good should still be able to feed 720p

So question is, is there enough room in your lounge room for them?
« Last Edit: June 16, 2011, 10:18:48 pm by The1 »
 

Offline firewalker

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Re: Extreme teardown - $42,000 NEC projector
« Reply #8 on: June 16, 2011, 10:19:58 pm »
You could also use it as a radiator during the Winter...  :P :P :P
Become a realist, stay a dreamer.

 

Offline mikeselectricstuffTopic starter

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Re: Extreme teardown - $42,000 NEC projector
« Reply #9 on: June 16, 2011, 10:29:19 pm »
Did you managed to work out how the system knows about the lamp? Let say you buy a new one. Is there any communication with the lamp module?
It's just a 24C02 eeprom - I've taken dumps of all 3 boards I have but not looked in any detail at the data.
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Offline tesla500

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Re: Extreme teardown - $42,000 NEC projector
« Reply #10 on: June 19, 2011, 06:16:51 am »
Excellent teardown! I love seeing old high end stuff like this.

Odd seeing zebra strips on something other than an LCD. I guess they wanted some play in the DMD connections so the position could be trimmed during alignment. The new DMDs we're using at work use rigid LGA mounting sort of like modern Intel CPUs. They're still using Xilinx FPGAs in their reference designs.

I have an LCD projector from the same era as your unit, and it has some common features, a small PIC micro, and a fly eye lens that looks identical to yours.

I recently made a video (actually 3 parts) of a much more modern DLP TV, it's interesting to see how things have changed since then:

Part 1: Initial look at the TV


Part 2: Opening it up, a look at the optics, and showing the DMD in operation (this is really cool to see running).


Part 3: Fixing the color wheel, and playing with the lamp


Regards,
David
« Last Edit: June 19, 2011, 06:21:01 am by tesla500 »
 

Offline mikeselectricstuffTopic starter

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Re: Extreme teardown - $42,000 NEC projector
« Reply #11 on: June 19, 2011, 10:11:33 am »
Excellent teardown! I love seeing old high end stuff like this.
Odd seeing zebra strips on something other than an LCD. I guess they wanted some play in the DMD connections so the position could be trimmed during alignment.
Yes - I'm sure it's so the DLP can be very rigidly clamped, and decoupled from any vibration picked up by the large heavy PCB. Socketing a chip with that many pins whilst removing heat from the back would also be quite tricky.
Quote
The new DMDs we're using at work use rigid LGA mounting sort of like modern Intel CPUs. They're still using Xilinx FPGAs in their reference designs.
The 'custom' chip  in the DLP Pico kit is actually an Altera FPGA
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 


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