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2.4 Warning Temperature and Power Failure Protection
The projector will be automatically turned off when the internal temperature of the
projector is abnormally high, or the cooling fans stop spinning, or the power supplies in
the projector are failed.
• If the WARNING indicator is flashing, it may detect the abnormal temperature inside
the projector. Check the following possible causes and wait until the WARNING
indicator stops flashing, and then try to turn on the projector.
• If the WARNING indicator lights red, it may defect the cooling fans or power supply
circuits. Check fans operation and power supply lines referring to the chapter "Power
supply & protection circuit" in the Chassis Block Diagram section.
[Possible causes]
• Air filters are clogged with dust particles. Remove dust from the air filters by following
instructions in the "Air filter care and cleaning" below.
• Ventilation slots of the projector are blocked. In such an event, reposition the
projector so that ventilation slots are not obstructed.
• Check if projector is used at higher temperature place (Normal operating temperature
is 5 to 35˚C or 41 to 95˚F)
2.5 Air Filter Care and Cleaning
The removable air filter prevents dust from accumulation on the surface of the
projection lens and projection mirror. Should the air filter become clogged with dust
particles, it will reduce the cooling fan's effectiveness and may result in internal heat
build up and reduce the life of the projector.
To clean up the air filters, follow the cleaning
procedure below:
1. Turn the power off, and disconnect the AC
power cord from the AC outlet.
2. Turn the projector up side down and remove
air filters by pulling the latches of it upward.
3. Clean the air filters with brush or wash out
the dust and particles.
4. Replace the air filters properly. Make sure
that the air filters are fully inserted.
Do not operate the projector with the air filters removed. Dust may
accumulate on the LCD panel and the projection mirror degrading picture
quality.
CAUTION
Do not put small parts into the air intake vents. It may result in
malfunction of the projector.
2-3
Part 2: Repair Information
Air filter
Fig. 2-4
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