Anyone know anybody who will do an internal lens clean of a projetctor for us. We have a NEC vp6111 that the image had gone dull and wishy washy if you know what I mean and so we changed the bulb as it was near end of life and hey presto, with a new bulb its not much better if any :-(
We are in Doncaster, South Yorks, if we could get one near by would be brill, save on carriage etc. but if not would have to send.
If the projectors prism unit is badly burnt or seared it will cost nearly as much as a new replacement. This is why not many places actually do deep cleaning of projectors.
They are now classed as throw away items in this throw away world. Sad really.
Thanks for the replies guys. Just been speaking to a company who said just about the same thing, if its over 4 or so years old and you have changed at least one bulb, then be thankful it lasted that long and get a new one. Pity there was no way of checking before we purchased anew bulb. New bulb for sale, anyone!
Now just got to break it to the co-ordinator we need a new projector and buy it with the money we don't have!!
How do people feel about the effects of filter cleaning. We clean them during the holidays or when the teacher reports asks us to (which is never). I cleaned one today that hadn't been done for 700 hours.
Filter cleaning makes a MAJOR difference I feel, but my lot are so bad, home made mounts are a great cost saver and brilliant with funky roof configs BUT they are a royal pain when you cannot get the filters out to clean without taking the entire thing down, never mind that's on the list for the summer to fix and modify where possible to try and make that possible for future cleans
We do filters every year at least during the summer, the exception is woodwork / chemistry rooms which kick up lots of dust and other assorted crap, and thus get done each term.
Ordered a new projector and will fit next week. For the cost of them now looking at it its very touch and go on the age of the projector wether its worth keeping them after a bulb change once the images startes to go again. Just started making noises to the powers that be about having to get ready to delve deep to start replacing projectors from now on as most are of a similar age.
Same here every month, replace projector if necessary every 4 years as we installed all projectors throughout the school over a 4 year period which helps.
We do "Full" internal cleanings once a year which gets rid of the rainbow colors and generally foggy/poor image. We also clean filters whenever the warning comes on.
I was coming here to find out if anyone else was doing the same and see if they had any cool tricks... Only takes less than an hour and that saves a LOT of money compared to... finding what you are going to buy to replace it, getting a P.O. setup, receiving it, accounting having to pay for it, pulling down the old, changing out the mount, adjusting the new projector and... oh yeah... and PAYING the $$$ for a new Projector
We can't be the only ones are we?
The reason not many places do deep cleaning is because it is very specialised, we have done it for many years and have a special "clean room" to do it in likewise with lens rebuilding and as for not many have it done? we do hundreds and hundreds especially in the aproaching school holidays.
But to check your lends if its dusty you will lose black look in to your lens fron the side when on (never direct in to it) so your eyes are out of the projected beam and you will see the internal ellements and if they look cloudy or not.
Just so we are clear a "deep clean" is a COMPLETE dissmantle of the projector down to the case and then rebuild cleaning every part of the optical engine it is not a blow out with an air line (as i have seen some do and this would cause problems with lenses if this has been done)
the projector is then rebuilt and tested a full report is done before and after so a comparasen can be made and the improvement seen.
Last edited by Marc-Engineer; 14th December 2011 at 09:11 AM.
As a company we recommend a twice yearly service/clean of projectors. This involves filters cleaned and the lamp housing cleaned out as well. We have seen quite a few old units of various makes last upto 6 years before giving up the ghost.
TBH, we don't touch them. They get a quick dust out if we're replacing the bulbs, that's it. We are still running some 8 year old projectors, some others have failed after 3 years, but the failure rate is extremely low. I just don't see the point or have the time to keep cleaning them as it would take nearly 2 weeks for a technician to go round them all and clean them.
Does anybody use projections with built in automatic rolling filters?
I don’t clean the filters as often as I should but I do try and get around a few times a year otherwise they will clog up and the projectors will overheat and cut out.
It depends how dusty the environment is and how much use they get used, most of ours are on all day.
Dragging ladders all around school is a pain and can only be done after school, the worst ones are the ones with the universal mounts that block the filter so to do them properly you have to take them down. On some when you take the filter out the dust drops inside the projector so you can’t win.
I clean them when I need to change the lamp or if the image is poor using an omega VAC (antistatic, the sort of thing printer / copier engineers use) and an electric duster that blows air out rather than a compressor or the cans. You can get most of the dust out this way opening the optical path without taking the lenses out or touching the mirrors / prism.
I’ve just sent a sanyo back that was cutting out and the only way to restart it / clear the warning light was to pull the power cable out (power failure shown in the event log) they couldn’t find anything wrong with it and wanted a small fortune to clean it (we hadn’t done it yet because its still under warranty). They finally agreed to replace the fans but I’m not convinced it will make any difference. We are now starting to use Casio bulb and filter less projectors because I’ve had enough of Sanyo only time will tell how well they last.
We also need to replace our hall projectors 2 of them have failed and it was costing us a grand a year to have the filters cleaned, they are 6 meters high so who ever does it needs scaffolding…
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