Caring for the Air Filter
The air filter should be cleaned about every 100 hours. Clean the filter if the LAMP indicator and
TEMP indicator blink red simultaneously, or if a message prompts you to clean the air filter when
you turn on the unit, the filter needs to be cleaned. (Refer to "On-Screen Messages" in the Trouble-
shooting section.)
1 Turn off the projector, then unplug the power cord
2 To clean a reusable filter, carefully vacuum both sides of the filter area.
3 If the filter is damaged and needs to be replaced, contact your dealer or ViewSonic Corp. Replace
the old filter then put the grill back in place.
4 To reset the Filter Timer, turn on the projector power, go to the Option menu then select filter
timer. Reset the filter timer.
CAUTION:
• Switch power OFF and remove the power cord from the power outlet before beginning mainte-
nance work.
• Replace the air filter if contamination cannot be removed or if it is damaged.
• Do not use the equipment with the air filter removed.
• When the air filter becomes clogged with dust etc., the power supply may switch OFF automati-
cally to prevent the temperature from rising inside the projector.
• Make sure the lens is cool before cleaning.
• Do not use detergents or solvents such as benzene or thinners.
• Do not use chemical sprays.
• Use a soft cloth or lens paper only.
ViewSonic PJ750
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