Warning Temperature And Power Failure Protection - Sanyo PLC-XU355A Service Manual

Circuit Protections

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 follow-
ing 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)
the projector is shut down and the WArNING
indicator lights red.
When the projector detects an abnormal condition, it is
automatically 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, unplug the AC power cord and contact the service
station.
cAutIoN
DO NOT LEAVE THE PROJECTOR WITH THE
AC POWER CORD CONNECTED UNDER AN
ABNORMAL CONDITION. IT MAY RESULT IN
FIRE OR ELECTRIC SHOCK.
top control
-6-
WARNING emit a
red light