Sony kp57wv600 muted color not sharp anymore I feel that dust accumulated on projector lens, how to take a part and clean or should I call a technician ?

you need to take at part. and clean the lens.

You probably don't need to. I know you may see what looks like a lot of dust, but unless it's completely covered, that dust on the lens has very little effect on your projected picture. If it is really bad, you can try to open it up and clean the lens with a lint-free lens cleaning tissue (NOT FACIAL TISSUE) and a couple of drops of distilled water (or lens cleaning liquid). But you best bet, if it's really dirty is to take it to a service facility.

We supply original projector lamp,bulb,accessories,Lcd panel,Lens,DMD
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it seems the dust on the top of the LCD panel,
clean the air filter, it will keep the less dust into the body of the projector
the Lcd panel need to be cleaned ,but it is a little hard to do it , Pls do not to clean unless you are a repairer
We supply original projector lamp,bulb,parts,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
any questions, feel free to contact me
have a nice day!
Jerry,Lampdeng Limited

brown spot on the screen
the dust on the top of the LCD panels,
need to clean the LCD panels
We supply original projector lamp,bulb,parts,Lcd panel,Lens,DMD chip,color wheel,motherboard,powersupply,ballast... with high quality and competitive price.
any questions, feel free to contact me
have a nice day!
Jerry,Lampdeng Limited

its due to dust on color wheel clean the sensor and wheel. Problem will solve

Use an "Air Duster". A can of compressed clean air to blow the dust away.
Available at most electronic supply shops.

Hi there, Sharp makes light and compact projectors with low fan noise. Set the projector up in areas subject to minimal humidity and dust to avoid having to clean the lens too often. Remember that colors will get washed out if the screen is in direct sunlight. Learn a few troubleshooting techniques to get the most out of this work horse projector.

No Pictures, Sound or the Projector Fails to Start

If you have no pictures, sound or the projector fails to start, check that the power cord is plugged into the wall and that all the cables are connected to the rear panel. Make sure the remote control batteries are fresh. If you are using a notebook computer, make sure the screen output is correct. Check the Input Mode on the projector. Check the projector physically--is the lamp and cover in place? Check the key lock.

Open lamp cover and out bulb.Use air blower.It need service

not too difficult to do.
requires cover off and minor strip down.
if unsure consult a tech.