How to Open F30 projector and Clean dust on the LCD matrix

How to Open F30 projector and Clean dust on the LCD matrix

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Optical parameters
Brightness: 400 ANSI Lumens
Resolution: Native 1920x1080pixels full HD
Contast ratio: 5000:1
Dispaly technology: 6.0" Liquid Crystal Display
LED Lifetime: 30,000 hours
Throw Ratio: 1.4:1
Keystone Correction: Vertical: +/-15deg Manual

Interface
input: USB*2(USB in*1,USB Out*1)/HDMI*2/VGA/SPDIF
output: 3.5 mm Earphone

other Hardware
Speakers: 4Omega,5W x1(SRS Sound Technology)
Projection Screen Size (inch): 50-300inchs
Best projection Screen Size (inch): 60-150 inchs
Projection Distance (m): 2.5~ 4.5 meter

Thank you