Cleaning Panasonic PT-AE900U

I recently noticed one of the dreaded soft green "dust blobs" on the far right side of the image projected by my three year old Panasonic PT AE900U projector.  I am comfortable taking the case apart and such, but was wondering if anyone knows their way around this particular model and has some advice as to where/how the panels are packaged and how best to clean them.

Any thoughts on the subject would be welcome.

Thanks!

Update:  I was victorious over the green dust blob.  Basically, I took the case off of the projector, removed the screws holding the PCB over the LCD panels to loosen it without actually disconnecting/removing the board, turned the unit on its side, and blew compressed air at and around the green LCD panel. 

I am not sure what would cause white blobs, but if you think there is something wrong with your bulb, it is easy enough to inspect.  It is designed to be replaced as a regular maintenance item, so you can access it by unscrewing the plate on the bottom of the projector and carefully pulling it straight out.  Make sure the projector has been off for several hours before unplugging it and attempting this.  Also, handle the bulb by the black plastic pieces.  There are some fragile filaments and pieces that you do not want to risk breaking or you will be buying a new bulb.

How many hours do you have on this bulb?

If you want to rule out dust, you can open up your projector and blow compressed air around the lens and the LCD panels.  The LCD panels are underneath the printed circuit board behind the lens.  The Green panel is directly behind the lens and the Red and Blue ones are at 90 degree angles at either side.  You can see where they are located by following the three short electrical connectors that come up directly above them and connect to the top of the PCB.

Obviously be careful when using the compressed air.  I turned the unit on its side to make sure that I would not have to tilt the can at all and risk accidentally spraying any fluid into my projector.  The case unscrews pretty easily if you have a magnetic phillips head screwdriver (there are arrow pointing to the screws necessary to remove the top - one on the back panel and the rest on the bottom).  Don't forget to unscrew the lens shifting "joystick" from the front before removing the top.

The places where dust is most likely to be a problem are where it would optically interfere with something.  As long as you clear it away from the LCD panels and the optics in front of them, you should be fine.  The red and blue panels tend to be less susceptible to visible artifacts than the green.  The filter should prevent there being an extreme amount of dust, so if you clear any away from where it is causing a problem, you should not have much else to worry about.  Did you inspect your bulb at all to investigate the "oil speck" theory?

Regards,

You must use it in a relatively un-dusty environment.  I actually had a situation once where the projector was shutting down for thermal reasons because the filter was so full of dust.  I've been a bit more religious about my maintenance schedule since then. :)