Projection Spots (Bright/Dust) - How to get rid of them?

[Damage Inc.]

Hi,

I don't know if I already asked this here,
but I've posted the same issue at other specialized forums and got no replies at all.
So here it goes:


I have this DLP-projector and the projection has these dim-bright spots in them.
Kind of like a bunch of small and weak flashlights are aimed towards the screen.
And they are always present and fixed on their spots,
but they only show best in black/dark areas and when the colors are a bit dark.
So for example in the black bars they are visible, but especially in darker films/scenes this is not ideal.
I'm not sure since when they were there, I think since I got it though.

Now, how do I get rid of these cursed spots?
Because they annoy the heck out of me and make the image look cluttered.

I've only opened the lamp-cavity because I do not know how projectors stick together.
And of course I don't want to mess up anything, even IF I'm quite handy technically.
However, if I can not find an answer, I will try and open this thing up and clean it myself.
But I've made the thing as clean as possible, the lamps glass parts are just stellar.
As far as I can see the front-lens is also as clean as possible, spotless and shiny anyway.

Only, if you know where the lamp "connects" to a small piece of glass
in a metal frame with a circular cutout...
(Which the lamp shines through to the next compartment.)
That piece of glass seems to have some dust-particles on it.
But it seems to be on the inside when I checked with a magnifying-glass.
The frame is secured with a tiny screw, which I first of all couldn't find a fitting screwdriver for.
But with any firm grip I could get I couldn't get the thing turned.
So is it perhaps not meant to come loose ever?

And actually, the fan is full of dust on the surfaces.
But I can't reach it to clean all the hardened dust off, it also doesn't come off when in use so...

Besides that, I also recently read that some/most(?) DLP-projectors have like this sealed projection-path.
Which wouldn't let any dust in...
So, what's up with that, do I just happen to have one without a sealed path?
Apparently it was expensive enough, so I wouldn't think so, but who knows...

Oh, if you need to know, it is the Toshiba... TDP-T9.


So, does anyone know how to get rid of these spots?
Any help would be appreciated, I'm put up with this problem for a while now.

I have also contacted some addresses from the Toshiba-site.
But most just don't reply and some are just for whole different purposes.
One finally replied and I believe they said it's hard to determine.
But they just suggested I should send it in to let them check it and perhaps fix it.
Most people would probably say that, but I can simply not afford that.
As it would turn out to cost me about... what was it, say 300+ Euros.

I'm not even "buying that", because it can't be thát hard.
They probably just charge big bucks for the time spent on it, as usual.
Unless they use some kind of specialized (vacuum) lab.
Even then, some maintenance on it is not even remotely customer-friendly...