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Discussion Starter · #1 ·
Hi All,


Well it had to happen..


6 months in and my baby's got the dreaded green blobs on the screen.

By adjusting the focus they sharpen so I'm sure they're dust related, so thankfully it's not as serious as I first thought.


BUT..

I called took it back to NEC (it's a VT540) and (after the tech carrying it tripped up the stairs and nearly dropped it) they want to charge me $390 ! (about $230 U.S).

Seems a bit excessive to me just for dust, so I'm thinking about cracking her open and having a go at fixing it myself.

What do you guys think? I've read where some of you have done this, so was just wondering how hard it is and what the dangers are.

Or do I bend over take it and pay the four hundred bucks :p


Thanks guys.


Wayne.

Australia.
 

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Many people on this forum have successfully removed dust blobs themselves. Some recommend using the compressed air in a can that are used to clean computers, while others recommend a hand pump. $400 is outrageous for that procedure, which should take less than an hour.
 

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Discussion Starter · #3 ·
Yeh they told me it would take 3-4 hours which set alarm bells ringing.


I have tried vaccuuming from the outside through the filter holes but no luck. My only concern is if i open it there goes my warranty :(

And is there a chance of damaging some mirrors?


Any one else got any thoughts?

Cheers,



Wayne.
 

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Here is an example of a "dust-blob-endectomy". Shows a Sony LCD, but the NEC should be similar.

Dust Blob Removal.
 

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Discussion Starter · #5 ·
Wow. That actually looks pretty darn easy.

I don't know one end of a polarizer from another though or where to find it on the NEC. Anyone opened theirs ?


Nurse. Scalpel!


:confused:
 

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It should be exposed when you take the top off.


Here is the procedure I use on my Sanyo LCD. First, remove the filter and clean it and all the areas you can reach with a vacuum. Then take the top of the projector off and gently rest it on its side. Then I use a can of compressed air which has been partially used so as to minimize the chance of spraying any liquid. Carefully holding the can vertical, I blow all around the LCD panels, which is where you'll usually find the dust, and the back of the lens assembly, which you'll see in front of the panel assembly. DON'T TOUCH ANYTHING WITH THE TIP OF THE SPRAY TUBE! And don't shake the can around--just move it slowly as you blow with it.


This whole operation takes 15 minutes. I've had to do it twice in a year. I cut down on repeat visits by vacuuming my filter every week.


$300 bucks to do this is highway robbery. Just take your time and make note of every step for future reference.


Dan
 

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When doing this, be sure to keep the air can up-right at all times!


It should be pretty easy. I did my 11HT in about 10 minutes!


Gus
 

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Quote:
if i open it there goes my warranty
Only if they catch you or you confess to it :D


If you don't screw up there is no way they can catch you :D


Beware of the liquid contaminants that can come out of the compressed air can. I use a hand pump connected to a plastic tube (aquarium pump tubing) with an air filter (IV used, dried filter that's was discarded by my hospital). This way no chance of liquid contaminant and the filter catches any dust contaminants. My wife pumps while I direct the hose :D
 

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Discussion Starter · #9 ·
Thanks Guys.


Huey good to hear from you again.

Although the "my wife pumps while I direct the hose" was a bit too much information if you know what I mean. :p hehe.


Think I'm going to get my Projector back and have a go.

Any 540 owners out there who've done this? That would seal my decision.


Cheers,


Wayne.:D
 

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Quote:
Originally posted by Huey


My wife pumps while I direct the hose :D
That's probably why NEC charges so much. The tech guy has to get his wife to come into work and "pump."
 

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Turn it on its side and slap it a few times. If you are lucky the blob will fall off and get sucked out the exhaust next time you turn it on. The VT540 is designed to be portable so it isn't totally fragile.
 

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Quote:
Turn it on its side and slap it a few times. If you are lucky the blob will fall off and get sucked out the exhaust next time you turn it on.
Doesn't Viagra do the same thing? :D :D :D
 

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One technique that was told to me by the Sanyo Canada Service Manager was to use compressed air from a can and sit the projector on its side so you blow the air with the can staying upright. In that way you will avoid blowing liquid from the can into the projector.


Sanyo Canada does not void warranty if the user cleans his/her own projector. Only voids warranty if you do damage in the process.


Ray
 

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Sometimes the dust particles can "adhere" to the surface of the LCD panel. Some people have recommended using a cotton swab to remove them. Be careful not to leave any stray cotton threads stuck inside.
 
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