Comments on: Cheap projector repair

By: ignacio

ignacio — Wed, 10 Jun 2009 01:49:18 +0000

hi, im locate in washigton dc i purchase a dell mp3400 proyector the problem is my brother accidentally put a password in and now a can get into the proyector can you clear the password??

By: CARLOS

CARLOS — Sat, 30 May 2009 15:39:14 +0000

Hi Will,

I have just replaced the bulb of my projector lamp.
The lamp unit is now powered externally to the 220v mains since the reading I get from the projector’s lamp connection is 56volts.

The bulb works and the fan goes on but there is no image.

You mention bridging the trigger leads. Could you describe what to look for, since I have no idea what it looks like. And how do I bridge it?

Thanks in advance

By: Mark

Mark — Mon, 15 Sep 2008 16:26:17 +0000

You might be interested to know that for about £8 / $16, you
can buy such things as 100w 12v, 150w, 15v and 250v 24v
lamps that are the same size as the MR16 lamps. They are
used for disco lighting – lifespan is not so good – at
between 50 and 300 hours – but with an average of around
100 hours for £8 / $16, you can at least afford to keep a
spare. Google for A1 232 for the 15v 150w unit – or just
google for: projector lamp A1 259 – 250w 24v and in a
500hr flavour too.

Very good colour rendering due to high temp burn and
inexpensive into the bargain.

Mark

By: The Eggman

The Eggman — Fri, 30 May 2008 17:13:23 +0000

LOL just looked Â£231 now jesus

By: The Eggman

The Eggman — Fri, 30 May 2008 17:08:26 +0000

will this mod work on other projectors ?? ive a Toshiba TLP410 and bulb asembly is practically the same also what is the bulb mounted into on your photo ?? this sure would save me some money my last bulb was nearly Â£200

By: atrain

atrain — Sun, 25 May 2008 20:06:16 +0000

After a bit of research, you can use a simple rectifier for a ENX (310W bulb) or a bit more stuff to drop the voltage for a FXL bulb. Or, you can just use a 500W household dimmer to drop the voltage.

Note, I found a nice site diypro.us that sells MH bulbs so you rebuild the bulbs without hacking the projectors.

By: atrain

atrain — Fri, 23 May 2008 20:39:36 +0000

Thats a 82v bulb. It looks like you connected it directly to the 120V input. Is this the case? Is this safe?

I have an ancient projector with no bulbs to be found (and really expensive) maybe I’ll consider doing this once the bulb dies.

By: andrew

andrew — Fri, 23 May 2008 01:08:01 +0000

interesting, but you’re going to lose the true white you get from projector bulbs. oh wait, already been said :)

By: Ryan

Ryan — Thu, 22 May 2008 21:36:28 +0000

I’ll admit the picture color is slightly off, but not to the point where it kills the image. The color is in my opinion slightly warmer which I don’t find to be such a bad thing either.

I chose the FXL-10 bulb because it is an extremely bright and cheap bulb. Though the rated life is low, it’s been running for monthes fine and when it does blow on me, I won’t be heartbroken.

Thanks for looking.

By: Hello1024

Hello1024 — Thu, 22 May 2008 20:02:24 +0000

I’ve done this before, and I’ll tell you the result was disappointing to say the least.

I used a standard 240 volt (UK) spotlight bulb, but the problem is unless the light coming out of the bulb is exactly parallel, it won’t pass all the way through the projector, so since my bulbs “viewing angle” was ~30 degrees I estimate only about a quarter of the light output of the bulb got to the LCD’s, and even less to the screen.

Interestingly, color was off to start with, but a few color profiles soon sorted that (adobe gamma utility etc.), and hotspots aren’t a problem because the projector had a lens that looked like frosted glass, the purpose to evenly spread light across the screen. In fact it wasn’t even possible to get one part of the screen brighter than the rest!

By: twistedsymphony

twistedsymphony — Thu, 22 May 2008 18:56:57 +0000

Quite interesting… though the key to a good projector bulb is it’s ability to produce a natural white light. Overhead projectors aren’t much on quality and usually just throw uneven dingy yellow shades and a nice big hot spot in the center.

While this is quite interesting in terms of getting an otherwise junk pj back up and running for cheap money, I’d be interesting in seeing a slightly higher quality solution where the bulb has good color accuracy and no hot-spots, even at $40 or $50 a DIY bulb with white levels and even light output would be a fantastic alternative to the $400-$600 replacement bulb.

By: barry99705

barry99705 — Thu, 22 May 2008 17:42:40 +0000

I like this comment,

“After a few minutes, I started smelling a burning plastic smell. I turned it off and sniffed it. Apparently the extension cord couldn’t take the heat of the bulb. I turned it back on and let it burn off. After a little while the smell stopped and it was all good. I’ll have to open it back up again at some point and replace the cable with something better suited for the heat. But in the mean while whatever was burning stopped and there is no smell anymore and it’s all good.”