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beatrice
Joined: 13 Jun 2014 Posts: 1 Location: France
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Link Posted: Fri Jun 13, 2014 12:47 pm Post subject: Bypassing lamp detection circuitry in videoprejector |
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Hello,
I'm having a problem with my video projector. The lamp went off, I want to replace it with a pcb with LEDS. The problem is that I need to bypass the lamp detection circuitry so that my new lamp can work with the motherboard. I know I have to cut off two wires and connect two others to bypass the detection,I think it's the yellow or the blue one ( on the 2nd picture, the one removed). But I 'm not sure.... My projector is a canon sx6. Here's some picture of it. If anyone could give some help, it would be fantastic. Thx a lot.
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JayAllan
Joined: 03 Jun 2007 Posts: 175 Location: Los Angeles
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Link Posted: Thu Jun 26, 2014 4:21 am Post subject: |
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Would love to figure this out myself. Not sure what the light output is on the OEM bulbs but I doubt you could get enough LEDs in the space the other lamp was in however.
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AnalogRocks Forum Moderator
Joined: 08 Mar 2006 Posts: 26690 Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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Link Posted: Thu Jun 26, 2014 4:27 am Post subject: |
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That would be sweet for all those dead $800 bulb'ed projectors that are laying around.
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winny
Joined: 09 Oct 2013 Posts: 403 Location: Sweden
TV/Projector: BD808s, BG1209/2
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Link Posted: Thu Jun 26, 2014 6:59 am Post subject: |
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http://www.instructables.com/id/Fooling-the-projector/step2/Bypassing-the-control-module-1/
The easiest but most dangerous way unless you know what you are doing to find the equivalent power-good/lamp-on-signal in your projector is to probe it while the projector is still working. If you can locate the lamp-drive PCB which should be separate, it shouldn't be too hard to narrow this down anyway.
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macgyver655
Joined: 22 Aug 2007 Posts: 8508
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Link Posted: Thu Jun 26, 2014 1:39 pm Post subject: |
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I have already assisted others in the past (some members here) to disable the protection circuit is various makes, including JVC with no problem. However the led replacements were not bright enough, even with led groups.
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Jeremy112
Joined: 28 Sep 2006 Posts: 2645 Location: Fond du Lac, WI
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Link Posted: Tue Jul 01, 2014 2:34 pm Post subject: |
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There are single chip 6000 to 10,000 lumen LEDs available for DIY uses. These are more than bright enough, but they run quite hot and require a good heatsinking solution to keep them from burning out. I have seen many modded projectors with LEDs that worked, but were dim. Those projectors weren't even using LEDs anywhere near 6000 lumens or even 4000 lumens.
You also need to keep in mind that that lovely glass shroud on original lamps is specially designed to reflect the light at a certain angle into the projectors light path. So a similar shroud would be ideal on the LED as well.
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