26ViewSonic PJ678
Maintenance
The projector needs proper maintenance. You should keep the lens clean as dust,
dirt or spots will project on the screen and diminish image quality. If any other parts
need replacing, contact your dealer or qualifi ed service personnel. When cleaning
any part of the projector, always switch off and unplug the projector fi rst.
Warning:
Never open any of the covers on the projector. Dangerous electrical voltages inside
the projector can cause severe injury. Do not attempt to service this product yourself.
Refer all servicing to qualifi ed service personnel.
Cleaning the Lens
Gently wipe the lens with lens cleaning paper. Do not touch the lens with your
hands.
Cleaning the Projector Housing
Gently wipe with a soft cloth. If dirt and stains are not easily removed, use a soft cloth
damped with water, or water and neutral detergent, and wipe dry with a soft, dry
cloth.
Cleaning the Air Filter
The air fi lter, which is located at the bottom of the projector, should be cleaned after
every 100 hours of use. If it is not cleaned periodically, it can become clogged with
dust and prevent the projector from being ventilated properly. This can cause over
heating and damage the projector.
To clean the air fi lter:
1. Switch the projector off and unplug the AC power cord from the wall socket.
2. Place a protective sheet (cloth) beneath the projector. Turn the projector over so
you can see its underside.
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