Справочник Пользователя для SZ Telstar CO. Ltd UST520U5

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CLeaning the Lens
An optical lens cleaning solution can be used to clean the 
projector’s optical lens. Apply a small amount of the cleaning 
solution to a clean soft cleaning cloth and gently wipe the lens in a 
circular motion.
important: Do not apply cleaning solution directly to the lens. 
Do not use abrasive cleaners, solvents or cleaning cloths. Do not 
apply the cleaning solution to the projector’s case
upDating the projeCtor
When firmware updates are available for your projector a   red 
numeric indicator will appear on the home screen   system update 
icon. To update the firmware on your projector, select the system 
update icon from your projector’s home screen. 
reset to faCtory DefauLts
To erase all data on the projector and reset all settings to 
factory defaults:
1.  Select "Settings"   from the projector's home screen.