Question about NEC VT470 Multimedia Projector

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Compressed air Vs vacuum cleaner for filters?

I have a ceiling mounted data projector with my interactive whiteboard. The ceiling is VERY high and cleaning the filters is a mission! I need to purchase a cleaner and was wondering if an ordinary battery operated vacuum cleaner is strong enough to clean the filters or would a can of compressed air be better? There are other data projectors in my school but I don't think they've ever been cleaned!!!

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Don't clean with compressed air, you will contaminate the air you breathe. I just bought a small ShopVac with an 18-foot hose to clean exactly what you're describing

Posted on Jul 24, 2009

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I have found that compressed air works the best, but you need to get right to the filter and take it out and clean it, if you have a dirty filter for to long it can blow your bulb, i clean mine about every 200 hours or so.

Posted on Jul 12, 2009

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Used compressed air, consider a pvc pipe for the long reach. Leave units off until dust settles

Posted on Jul 07, 2009

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Posted on Jan 02, 2017

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SOURCE: NEC Model VT48 - need to clean filter

This is a solution for the VT 480 by NEC for filter clean. on the left side there are two slots that have dust filters which can slide vertically to reveal micro screens that one can blow, tap vigorously, or vacuum to remove any dust build up. I hope this helps you with your unit.


Posted on Jan 14, 2009

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SOURCE: Clean Filter - NEC VT700 projector

Need to go into the menu and find the option to reset. Choose the "reset filter hours" option.---Rick

Posted on Sep 08, 2009

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Related Questions:

3 Answers

What's the feature of an interactive whiteboard

Interactive whiteboards are mainly used to improve quality of the education in classrooms. The use of interactive whiteboard allows instructor to alter the different information present in the board which can even be copied and transferred to the next slide. The data that is present in the board can be clicked on, moved, copied and analyzed. The interactive whiteboard also allows the teacher to write like the any other whiteboard but it also turns the handwritten notes into texts which can be later referred to at any moment of urgency.

Please read the following tutorial to know some features of interactive whiteboards.

Jun 07, 2017 | The Computers & Internet

1 Answer

Panasonic interactive whiteboard won't project computer

If you'd like to email me at I'll be able to help you in more detail. There's a fundamental error to the question here. That is the board in itself will not show the image - your boards is effectively a large flat mouse. A pointing device infact. The peice of equipment that "shows" your PC image is actually the projector. There could be several reasons why your projector isn't showing the image.
1 - is there either a VGA or HDMI cable connected from your laptop/PC to the projector (Sometimes via a wall plate).
2 If 1 is true and the projector is turned on does it show any sort of image? Now there are two thongs you can do from here. a) If you have a laptop check to see if your Video settings are set to clone across to a secondary monitor on most laptops you should hold down Function key and F8 this will toggle through three options Onboard screen remote screen and then both. there could be some lag between the two so hold down fucntio at the same time press F8 then wait a few seconds then go again.
Finally on you projector remote there may be an auto search buttion which will hunt for your PC image by checking each of the Projector inputs in turn. Generally speaking however you should select "Computer 1" or sometimes named as RGB 1

Hope that helps email me if your still having problems.

Aug 21, 2012 | Panasonic Panaboard Ub-T880 Interactive...

1 Answer

Many little white dots scaretered throught display

Yes you have dust particles inside the light chamber.
Remove the filters and clean them gently with a vacuum cleaner.
Used a compressed air can to blast air into machine and have vacuum (on Low) **** up dust.
You may have to take out bulb to do this (dont touch the glass on the bulb)


Please dont forget to vote this answer was helpful

Many thanks


Feb 16, 2011 | BenQ MP515 DLP Projector

1 Answer

How do I change the filter on my CP S335 projector. It is saying no air flow.

WARNING ?Before caring, make sure the power switch is off and the
power cable is not plugged in, then allow the projector to cool sufficiently. The
care in a high temperature state of the projector could cause a burn and/or
malfunction to the projector.
?Use only the air filter of the specified type. Do not use the projector with the
air filter and filter cover removed.
?Avoid wetting the projector or inserting liquids in the projector. It could result
in a fire, an electric shock, and and/or malfunction to the projector.
CAUTION ?Please replace the air filter when it is damaged or too soiled,
and also when you replace the lamp.When the indicators or a message prompts you to clean the air filter, clean the air filter as soon as possible. If the air filter becomes clogged by dust or the like, internal temperatures rise and the power may be automatically turned off for malfunction prevention.
1. Turn the projector off, and unplug the power cord. Allow the projector to cool for at least 45 minutes and prepare a vacuum cleaner.
2. After making sure that the projector is cool adequately, slowly turn the projector so that the lens-side is facing up. Please be careful for a projector not to fall. While the projector is placed lens-side up, hold the projector.
3. Putting a finger on the filter cover's knob, slide the filter cover in the direction of the arrow to remove it.
4. Holding the air filter's knob, pull the air filter off.
5. Apply a vacuum cleaner to the vent of the projector for the air filter. And then slowly turn the projector bottom up.
6. Apply a vacuum cleaner to the air filter and filter cover.
Please replace the air filter when it is damaged or too soiled.
To prepare a new air filter, contact your dealer and tell the air filter type number = NJ09702.
An air filter of specified type will come even with the replacement lamp for this projector.
7. Position the cleaned air filter or a new air filter into place, and push the points
of "PUSH" word with claws to fix the air filter.
8. Replace the filter cover and snap it back into place.
9. Slowly turn the projector so that the top is facing up.
10. Turn the projector on, and reset the filter time using the FILTER TIME
function of OPTION menu (?37).
NOTE • Incorrectly resetting of the filter timer (resetting without replacement,
or neglect of resetting after replacement) will result in incorrect message

Jan 03, 2011 | Hitachi CP-S335 Multimedia Projector

1 Answer

Yhe picture on my 3800 has a tendancy to shudder every now and then. it only seems to do this when it is ceiling mounted. any ideas? Cheers! Bryan

I should say it has a heating problem. In the uppermost part of rooms, the temperature can get very high.
Check the air vent filters are clean and replace them as required. Make sure the air ways are clear by placing a vacuum cleaner pipe against the air inlets and exhaust outlets to clean them out. That should dislodge any fluff etc.
Hope this fixes your problem.

Nov 08, 2010 | Mitsubishi HC3800 1080p Home Theater DLP...

1 Answer

LCD Ceiling-mounted projector keeps overheating.

canned air from the outside is good, but a lot of the dust collects on surfaces and bakes on. for best results, remove the top cover and blothe dust out of every nook and cranny, wipe it off of the fan blades, and make sure all of the fans spin well. you may need to replace the temp sensors if it happens too frequently. also, during the winter when the heat is on full blast, it tends to get very hot on the ceilings. is there enough air flow in the room? lastly, make sure they turn them off at the end of the school day. this will lenghten the life of the power supply and the lamp.

Jan 25, 2010 | InFocus IN24 Multimedia Projector

2 Answers

Our Infocus sp5000 is shutting down because it is getting too hot. We had just cleaned the filter.

you also need to clean out the machine with canned air. also check to see that all of the fans are running. if they are not all running, they need to be replaced. also, the temp sensor near the lamp housing may also need replacing.

Oct 24, 2009 | InFocus SP5000 Home Theater Projector,...

1 Answer


There should be a menu option for orientation. The selection may be for ceiling vs standard. You have the unit set for ceiling mount.


Sep 12, 2009 | Sony VPH-G70Q Video Projector (VPH G70Q,...

1 Answer

Pop saying check filter

Hi there...FIRST remove the dust filter and clean it with some compressed air, or you can leave it in place and use a vacuum cleaner hose to suction off the dust. Some projectors have a sensor that gets reset when the filter is removed. A lot don't. Check the onscreen menu for a reset option for the dust filter. This option may be only accessible with the remote control...DON'T reset the lamp hours! The most important thing with LCD projectors or any other projector, for that matter, is to keep the dust filters clean--think of someone putting their hand over your nose and mouth. The projectors emit a *huge* amount of heat and need plenty of air flow to remain cool. Also, the benefit of cool air keeps the delicate LCD panels from aging prematurely!---Rick

Jun 26, 2009 | Hitachi Performa CP-RS55 Multimedia...

2 Answers

Sanyo PLC-SW30

The filters are starting to show their age. This is a normal occurance for projectors and is the result of heat. The filters and/or the mirrors might need to be changed.

May 08, 2008 | Sanyo PLC-SW30 Multimedia Projector

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