Question about Hitachi CP-S240 Multimedia Projector

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Projector is saying to check the airflow? What does that mean?

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This means you may have an obstruction preventing airflow from circulating properly. If this is the case, it can lead to overheating of the projector, which could result in very expensive repairs.

You need to regularly clean the air filter and rest the filter timer to ensure that your projector can cool itself properly. I recommend doing this every 100 hours of use. In fact, Hitachi projectors can be set to warn you when a certain amount of time has elapsed. I believe 100 hours is the default.

If cleaning the air filter and resetting the filter timer does not remedy this, you can use canned air to blow out the inside of the projector and try to clear the obstruction.

You also want to make sure all fans on your projector are working. If not, stop using the projector and replace those as soon as possible.

Overheating is the leading cause of projector malfunction, and basic routine maintenace can increase the life of your projector and the lamp by a great deal. For example, the lamps for that machine are typically estimated to have a life of no greater than 2000 hours, and typically you'll see them go out anywhere from 1300 hours to 1600 hours. Because I regularly check my machines, the ones that are not used intensively for hours on end every day will often have a lamp life of over 2000 hours, and I found one recently that made it to 3100 hours.

Posted on Apr 07, 2011

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There are several things that can cause this problem, but the first thing I would check is the filter. The projector requires airflow to keep it cool. If airflow is blocked, the projector will overheat and shut down automatically.

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After running for a few minutes it shuts off, won't restart until it cools down


the Projector unit may be overheating due to airflow. ensure that the intake filter is not blocked, remove and clean it and then replace do not run with filter removed as this will cause dust inside your machine. check that none of the airflow slits on the body of the machine are bloced or taped over.
check that the unit has enough airflow around it to keep cool if unsure move the machine to a open space and let it run to see if the problem persits or stops.

if this persists it may mean the overheat cut off switch is defective and keeps activating even though the machine is not overheated.

I hope this helps.

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My projector was working fine then a error message came up saying to check airflow. The temperature light and the lamp light are on as well. Is this something I can fix myself? If so, how? Thanks....


the projector is probably dusty. the dust keeps in the heat that the projector is trying to expell. use canned air to blow out the dust. also, check to see that all of the fans are working. if one of them is not, replace it.

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Whats it mean when the projector says to check the airflow every few hours on the screen. The projector is a Hitachi CPX440


one or more of the fans may not be working properly and the heat is triggering the temperature sensor. if the projector is too dusty, the heat stays in and may ruin components. if there are filters, clean them first.

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it has lamp which has 2000hour in normal and 3000 in econom mode to shinenormal then it must be changed and your may already in this state and began such things.

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I have only had my sony tv for 2 half years and it needs a bloody lamp already whats going on with sony it was one of the leading companys now its gone right down hill i should not have to pay out already...


Hi I am Vortash sorry to say lamps are notoriously thee major cause for 90% of projection tv failiures , and unfortunately you can never guess how long they will last .
Yes sure they say they will run for 3000 hours but not always as factors like posistion and airflow to the set will alter the opperating characteristics of a lamp the hotter they get the shorter they last , thats why there is no guarantee with a bulb once it is out of the packet . The next bulb you buy may last 3 years or it may last 2 or even 1 , so if you want your b8ulbs to last check that your set has a good airflow around it and that the fans are working correctly , that will pro;ong the life of your bulb .. regards Vortash

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Check air flow


You need to clean the filters. When the filters collect alot of dust on them, they block the airflow to the internal parts of the projector and can cause the bulb to blow due to the temperature getting to hot.

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