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Author Topic: Bought a projector  (Read 1404 times)

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CaptainZok

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Bought a projector
« on: 16 October 2007, 20:47:01 »

You may remember I was looking for a projector last week.
Settled on one of these clicky
Just arrived today and it looks sweet. Were running a training day for local shop stewards tomorrow so it will get used in anger in the morning.
I might even get to test it on a few movies at home lol.
Just gotta get the cinema staff trained. ;D ;D
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Ken T

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Re: Bought a projector
« Reply #1 on: 16 October 2007, 20:56:41 »

Looks very smart. Next thing you need is a large white wall, plenty chilled beer, and a TV signal, just in time for the next Grand Prix !.   ;D ;D
 You know when it says 4000 hrs use, on some printers like Epson, this means after 4000 hrs it will not try to light the bulb, not that the bulb is necessarily gone. There are ways around this.....

Ken
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Danny

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Re: Bought a projector
« Reply #2 on: 16 October 2007, 21:33:19 »

hahaha i thought you meant a headlamp!! ;D
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Chopsdad

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Re: Bought a projector
« Reply #3 on: 16 October 2007, 21:37:18 »

Quote
Looks very smart. Next thing you need is a large white wall, plenty chilled beer, and a TV signal, just in time for the next Grand Prix !.   ;D ;D
 You know when it says 4000 hrs use, on some printers like Epson, this means after 4000 hrs it will not try to light the bulb, not that the bulb is necessarily gone. There are ways around this.....

Ken

Tell me more Ken.  :o

 My work projector doesn't light anymore and the replacement bulb is over £300 so has been replaced with a new unit recently and I already have the screen at home  ::)
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STMO123

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Re: Bought a projector
« Reply #4 on: 16 October 2007, 21:42:45 »

Quote
Quote
Looks very smart. Next thing you need is a large white wall, plenty chilled beer, and a TV signal, just in time for the next Grand Prix !.   ;D ;D
 You know when it says 4000 hrs use, on some printers like Epson, this means after 4000 hrs it will not try to light the bulb, not that the bulb is necessarily gone. There are ways around this.....

Ken

Tell me more Ken.  :o

 My work projector doesn't light anymore and the replacement bulb is over £300 so has been replaced with a new unit recently and I already have the screen at home  ::)

What is the make/model Mark?  I have a friend who runs Primary ICT Solutions in Barnsley. He gets the bulbs for the overhead projectors for interactive whiteboards quite cheap, so........ :-/
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Chopsdad

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Re: Bought a projector
« Reply #5 on: 16 October 2007, 21:47:30 »

I'm sure it's an Epsom blah blah blah. :-/

It's in a drawer in work so I'll have a look and let you know tomorrow. :y
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STMO123

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Re: Bought a projector
« Reply #6 on: 16 October 2007, 21:48:23 »

Quote
I'm sure it's an Epsom blah blah blah. :-/

It's in a drawer in work so I'll have a look and let you know tomorrow. :y

 :y
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Entwood

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Re: Bought a projector
« Reply #7 on: 16 October 2007, 21:56:32 »

On some projectors .. not all ... remove bulb....  count to 10 .. insert bulb back in ..  :)  resets the internal clock and the thing fires up  :)

HOWEVER BE WARNED THIS HAS RISKS

The reason for the hours limit on the bulbs is simple, if/when they "blow" they do so big-time and can shatter with extreme force. This can be damaging to persons nearby .. but is usually VERY damaging to the internals of the projector. AFAIK most makers consider an exploded bulb to be a result of not replacing on time and will not cover any such damage under warranty ... read the  .. usually .. very small print carefully !!

HTH

:)
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Chopsdad

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Re: Bought a projector
« Reply #8 on: 16 October 2007, 22:04:20 »

Oh well.  It probably is knackd then cos I've had it in and out so many times it was doing the hokey cokey ;D
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Ken T

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Re: Bought a projector
« Reply #9 on: 16 October 2007, 22:06:11 »

What Epson do is : there is a fuse in the bulb assembly. When you plug in a new bulb, this resets the counter, and then blows the fuse. If you work out where it is, you can replace the Surface Mount fuse. I would steer clear of simply bridging it with a piece of wire, as the electronics might be damaged if the fuse doesn't blow (If the fuse is 100mA and you put in a piece of wire that needs several amps to blow, then the drive circuit will prob get damaged). Dangers of this are that the bulb may eventually shatter, but I would have thought it more likely that simply the element will go. Also the light output will not be as good as a new bulb, but if you are watching films, you may not notice. This worked on our EMP-7500, and may work on others.
Cheers Ken
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Ken T

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Re: Bought a projector
« Reply #10 on: 16 October 2007, 22:21:20 »

I agree that a bursting bulb would not be nice, but there is no guarantee that it would not happen to a new bulb before the hours are up. I think it is mainly due to a  manufacturing weakness in the bulb that gets weakened over time with the very high temperature they are running at. Just like Cambelts, some last well over the 40K miles, some fail at 40,001 miles. The hours of use are determined by the light output which falls off with time, and also the manufacturer's desire to sell you a nice new £150 bulb. Have a Google for "projector Bulb counter" and see what you think. Interestingly LED outputs are getting higher, and some examples I saw are close to the light requirements for a projector. If you used 3 coloured LEDs, you wouldn't need the prismatic splitter that most projectors use, and hence need less light to produce the same output. Trouble is LED's last a long time and they wouldn't sell as many replacement bulbs.
Cheers Ken
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CaptainZok

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Re: Bought a projector
« Reply #11 on: 16 October 2007, 22:23:08 »

Don't think that will be a prob with this benq. Theres a manual bulb counter reset in the menu.
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