I need HELP! My Overhead projector seems to be burning a hole in my panel

meghinus/anime3 · 19th July 2004, 10:19 PM

I'm having a problem with my overhead projector. Within 10 minutes of running my DIY projector I notice a small dark spot developing in the picture. It eventually grows into one large black spot until I remove the panel from the overhead projector and it slowly disappears. My panel is a 3M 6400 and the OHP is an Apollo 2210. (I have noticed that while OHP is running alone, it seems to make a magnifying glass effect to which I can see multiple heat spots rising up to the lens at top.) The black spot that developes on the panel seems to be a direct result from that light trail. Does anyone know how I can remedy this? Thanks in advance

Overd0se · 19th July 2004, 10:34 PM

Do you have any active cooling on the panel? Quiet computer case fans work pretty well if you don't. Just hook them up with a ac adapter and a switch. Alternatively you could use an ir filter near the bulb. I think they are available from the diybuildergroup store. I have no experiance with the filters, so I can't comment on their effectiveness; however it sounds like they would work well. I have a 120mm fan blowing across my lcd. It seems to work well enough.

dengez · 20th July 2004, 01:53 AM

funny you say that because i have a 3m 6400 and apollo concept 2250...almost exactly the same but my ohp is 4000 lumens and i still havent had that problem...i dont kno what it is....

dengez

19th July 2004, 10:19 PM	#1
meghinus/anime3 diyAudio Member Join Date: Jul 2004 Location: Alabama	I need HELP! My Overhead projector seems to be burning a hole in my panel I'm having a problem with my overhead projector. Within 10 minutes of running my DIY projector I notice a small dark spot developing in the picture. It eventually grows into one large black spot until I remove the panel from the overhead projector and it slowly disappears. My panel is a 3M 6400 and the OHP is an Apollo 2210. (I have noticed that while OHP is running alone, it seems to make a magnifying glass effect to which I can see multiple heat spots rising up to the lens at top.) The black spot that developes on the panel seems to be a direct result from that light trail. Does anyone know how I can remedy this? Thanks in advance

20th July 2004, 01:53 AM	#3
dengez diyAudio Member Join Date: Jun 2004 Location: u.s	funny you say that because i have a 3m 6400 and apollo concept 2250...almost exactly the same but my ohp is 4000 lumens and i still havent had that problem...i dont kno what it is.... dengez __________________ hmmm

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19th July 2004, 10:34 PM	#2
Overd0se diyAudio Member Join Date: Jul 2003 Location: .	Do you have any active cooling on the panel? Quiet computer case fans work pretty well if you don't. Just hook them up with a ac adapter and a switch. Alternatively you could use an ir filter near the bulb. I think they are available from the diybuildergroup store. I have no experiance with the filters, so I can't comment on their effectiveness; however it sounds like they would work well. I have a 120mm fan blowing across my lcd. It seems to work well enough.

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