Q. I need a projector to show power point presentations as well as movies. I need to use the projector in day light as well as in closed rooms. I do not have a big budget. Could you please help in deciding which one to buy? Thanks in advance.
Answer
Projectors can be classified various ways (e.g. by primary use, by resolution, by technology). Almost all projectors will readily accept a computer input.
I'm not going to try to recommend a specific model since you need a brand/model locally available and supported.
You need one with emphasis on brightness, portability, and secondarily contrast ratio and resolution.
A low budget (prices start at about $500) precludes higher resolution projectors, and tends to push you toward a DLP based "business" projector. Given your wish to use it in a lighted location you also need brightness (2000 lumens minimum).
See the link for some popular choices. Prices will be in the $700+ range for most. Look at the lower resolution models first since they will be a bit less expensive. Note this sight has many reviews, a database of available projectors, information on projectors, etc.
Hope this helps.
Projectors can be classified various ways (e.g. by primary use, by resolution, by technology). Almost all projectors will readily accept a computer input.
I'm not going to try to recommend a specific model since you need a brand/model locally available and supported.
You need one with emphasis on brightness, portability, and secondarily contrast ratio and resolution.
A low budget (prices start at about $500) precludes higher resolution projectors, and tends to push you toward a DLP based "business" projector. Given your wish to use it in a lighted location you also need brightness (2000 lumens minimum).
See the link for some popular choices. Prices will be in the $700+ range for most. Look at the lower resolution models first since they will be a bit less expensive. Note this sight has many reviews, a database of available projectors, information on projectors, etc.
Hope this helps.
DLP Projector color wheel malfunction?
chris m
:UPDATE:
I sent the projector to Optoma under warranty. I haven't been given a specific issue yet, however I did find out that it could be the electronics degrading due to overheating or the color wheel mechanism could be bad. There is a little wheel with Red Green Blue colors that spins in front of the lamp creating colors. It could be out of sync. Optoma told me that the projector can be sent to them for a cleaning every couple months for free, if under warranty.
ORIGINAL Q:
I have an Optoma 739 with about 800 hours on the first lamp. Recently after about 1hour of operation the image color begins to flicker and the image turns green. The projector is used in a smoking environment. What happened to the color wheel ; if it is that? And how can I prevent this in the future?
Answer
Projectors are not designed for smoking environments. I am quite surprised that Optoma is honoring yoru warranty. Most companies void the warranty, as they have "smoking" in the warranty statement.
The nicotine residue is sticky, which can clog the vents, filters, attract dust. This can cause the wheel to slow down. If the wheel slow down, that is one cause of the wheel going out of sync.
If you want projectors to work in a smoking environment, you need an enclosed box around it that can clean the air that is going in the projector.
I use to write repair manuals for projectors. The wheel out of sync would not cause the image to turn green, unless the wheel actually got stuck on green. A green image usually means there is an issue with the mainboard, which contains the video processor and controls the color wheel.
I would seriously suggest switching to an LCD projector. LCD projectors do not have any moving parts besides a fan.
Projectors are not designed for smoking environments. I am quite surprised that Optoma is honoring yoru warranty. Most companies void the warranty, as they have "smoking" in the warranty statement.
The nicotine residue is sticky, which can clog the vents, filters, attract dust. This can cause the wheel to slow down. If the wheel slow down, that is one cause of the wheel going out of sync.
If you want projectors to work in a smoking environment, you need an enclosed box around it that can clean the air that is going in the projector.
I use to write repair manuals for projectors. The wheel out of sync would not cause the image to turn green, unless the wheel actually got stuck on green. A green image usually means there is an issue with the mainboard, which contains the video processor and controls the color wheel.
I would seriously suggest switching to an LCD projector. LCD projectors do not have any moving parts besides a fan.
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