Optoma EH503 - Manual (Page 4)

English 4
Do not attempt to service this projector yourself. Opening or
removing covers may expose you to dangerous voltages or
other hazards. Please call Optoma to be referred to an
authorized service center near you.
8. Do not let objects or liquids enter the projector as they may touch
dangerous voltage points or short-out parts that could result in a
fire or electric shock.
9. See projector enclosure for safety related markings.
10. The projector should not be adjusted or repaired by anyone
except properly qualified service personnel.
Usage Notice