Sanyo XGA ULTRA SHORT-THROW PLC-XL51, Service Manual

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Circuit Protects
The projector will be automatically turned off when the internal temperature of the projector is abnormally high, or the cool-
ing 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 pos-
sible 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 40 ˚C or 41 to 104˚F)
Warning temperature and power failure protection
the projector is shut down and the WARNING indi-
cator lights red.
When the projector detects an abnormal condition, it is automat-
ically shut down to protect the inside of the projector and the
WARNING indicator lights red. In this case, unplug the AC power
cord and reconnect it, and then turn the projector on once again
to verify operation. If the projector cannot be turned on and the
WARNING indicator still lights red, it may defect the cooling fans
or power supply circuits.
CAUtIoN
DO NOT LEAVE THE PROJECTOR WITH THE AC POWER
CORD CONNECTED UNDER AN ABNORMAL CONDI-
TION. IT MAY RESULT IN FIRE OR ELECTRIC SHOCK.
Indicators
WARNING
emit a red light