Large Circle (green) at bottom of image?

Discussion in 'Projectors, Screens & Video Processors' started by sirp, Jul 7, 2004.

  1. sirp

    sirp
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    ive got a large green circle (when on black background is easily visible) at bottom of my image, its about six inch in diameter, what the hell is it?

    this is from a panny 300?

    anyone help?

    cheers

    Paul
     
  2. Supernatural

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    Thats known as a 'dust blob'. Try searching for this in the search above - as there have been loads of threads about these on the Panasonic AE series projectors as well as other brands that have non sealed optics.

    You should be able to find details of how to remove it - which involves taking the top off the projector.

    Paul
     
  3. sirp

    sirp
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    oh bummer! its still under guarentee, so i will email panasonic first before i take it apart..noticed its flickering too..only had 300 hours use!

    cheers
     
  4. harrisuk

    harrisuk
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    If its only showed up after 300 hours you are lucky. I got one on my ae500 after 50 hours use.

    It has started to annoy me now. I am going to undertake the cleaning job shortly.

    Be very interested to hear what Panasonic say though, please keep us posted. If they are up for taking it back and cleaning it and lettting you have a loan model in the interim I would almost certainly be trying it.

    We can dream :)
     
  5. kbfern

    kbfern
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    As you rightly say "its a dust blob" dead easy to fix

    1. remove lid
    2. squirt around the optics with a can of pressurised air( non liquid variety)
    3.put lid back on and voilar no dustblobs

    should take no more than 20 mins, dust blobs are a fact of life if you have a non sealed optic type projector but are easily removed.

    strange thing is I had around 6/7 dust blobs with my Sanyo Z1 within the first 10/15 hrs of use and since cleaning only 1 has appeared and now up to 300+ hrs.
     
  6. harrisuk

    harrisuk
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    Very interesting no one mentioned this before. This is what was worrying me. Please let us know where you get the stuff that is non liquid. I am worried about getting it on the panels.
     
  7. kbfern

    kbfern
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    I actually use Invertable air duster from RS components their item No 497-280.

    Its an inert solvent free gas type cost around £7 for a 200ml can.
     
  8. harrisuk

    harrisuk
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    Is that Richer Sounds ? If so can you buy it from any of their shops ? It sounds like just the job.
     
  9. kbfern

    kbfern
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  10. harrisuk

    harrisuk
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    Great just ordered one. Do you use one of these , what type of projector do you have ? This is just what I was looking for, no worries about liquid going onto the LCD panels.

    Thanks Again !
     
  11. harrisuk

    harrisuk
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    Mmm cost me £14 by the time I paid postage and Vat. Never mind, I can claim the vat back and after all its tax deductable......
     
  12. Supernatural

    Supernatural
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  13. sirp

    sirp
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    should i just do this, and not bother with panasonic then?

    orderd a tin, thought sod it :) do i need to use a vaccum as in the pic, dont want any rubbish falling out the vac on it?

    by the way, what do people used to clean dust off the outside of glass lense at front?
     
  14. harrisuk

    harrisuk
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    Lint free cloth (Like you use to clean glasses) Personally I am going to have a go. For dust the chances of it getting damaged in transit or comming back worse from Panasonic are not worth taking.

    Especially now I have some air that does not use liquid propellant.....
     
  15. sirp

    sirp
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    yes, i agree with you....i didnt realise you could get some stuff without liquid! let me know how you get on with it, your tin arrives before mine ;)
     
  16. harrisuk

    harrisuk
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    Yes. I have decided I am not going to use the vaccum either. They are not exactly that clean are they ? Worried about more crap falling inside.

    Going to carefully wipe down case before removing it then follow the calibos guide. I only have one blob at the moment after 90 hours use. I have been told that if you have a green blob on dark scenes it is most likely the green LCD panel (Apparently they are clearly marked).

    Just give them all a good blast and hope for the best. If careful should be OK.
     
  17. sirp

    sirp
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    good luck, report back your end result..hopefully my tin will arrive on moday !
     
  18. sirp

    sirp
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    well..sent my proj back to panny to get lense cleaned, and tried to get a bulb (as my brightness flickered a little)

    got it back today, less than 2 weeks turnaround, they have cleaned the lense, and replaced the bulb, and B/Q board, £500 worth!!

    for a change, a happy panasonic customer here :)
     
  19. harrisuk

    harrisuk
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    Well I have not heard anything yet but they have only had it for a week or so. Did they ring you when it was ready ?

    I have to say I have been very impressed with Panasonic thus far. They arranged collection of mine within 24hrs and dropped off the ae200 loan unit at the same time. Its not as good as the ae500 by any stretch of the imagination but its still a good unit and will probably knock 100 hours or so of my PJ by the time I get it back :) - Hopefully with a new bulb as well :)
     
  20. sirp

    sirp
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    a guy called me to just ask exactly what the issue was, that is all..and commenced rebuilding it :)

    must say, very bright now my new bulb is on.. pleased so far

    arrived back two days after phonecall
     

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