Originally Posted by obonillaf
Thank you, I'm going to do the focus procedure and tell you back. It's funny because my projector is quite new and I have kept it out of any dust that I'm aware of. If it indeed a dust blob, does it have a fix?
Epson has an 'open' light path to imaging which seems to invite resident dust. Not terribly detrimental to picture quality, but will decrease
contrast ratios in very dark scenes or scene transitions. There are probably a lot more dust particles along with the 'big' ones.
Sanyo projectors have open paths too and provide a little hand bulb blower with their projectors. There are little holes in the case to blow into
the light path. Bravo Sanyo.
You can open the Epson case, remove the 'motherboard and some sub-assemblies and blow away in the blind. It is more or less impossible to use a little hand blower while watching the results in an operating mode. If you are not familiar with electronic disassembly chores, you can: 1. Complain to Epson, 2. 'Take a shot at it' and hope for the best; 3. Send it to Epson or, 4. Go to the Epson repair center.
Epson could seal the light path or make it easy for a consumer to clean it.
Don't use a propane powered duster-it may damage the path.
Don't forget to clean the dust filter regularly.