Temperature Sensors, Wind Sensors - Sanyo PLC-WTC500AL Service Manual

Circuit Protections

Temperature sensors, wind sensors

The projector provides 2 temperature sensor ICs, 1 thermistor, and 1 wind sensor on the intake duct. These devices
are monitoring the surrounding temperature of the lamp, panel and intake duct, and the wind sensor is monitoring
airflow passed through the air filter in the intake duct.
- Room temperature sensor A (TH901) (around the front cabinet)
- Internal temperature sensor B (IC8841) (around the lamp house)
- Internal temperature sensor C (IC8871) (around the panel/prism)
- Wind sensor D (S901) (intake duct)
IC8841 on the Main
board (behind)
the projector is shut down and the WArNING teMP. in-
dicator is blinking red.
When the temperature inside the projector reaches a certain
level, the projector will be automatically shut down to protect
the inside of the projector. The POWER indicator is blinking
while the projector is being cooled down. When the projector
has cooled down enough (to its normal operating tempera-
ture), it can be turned on again by pressing the ON/STAND-
BY button.
✔
Note:
• The WARNING TEMP. indicator continues to blink even after
the temperature inside the projector returns to normal. When
the projector is turned on again, the WARNING TEMP. indi-
cator stops blinking.
Led indicators
WARNING TEMP.
blinking red
-7-
IC8871 on the Panel
sensor board
S901
Wind Sensor
TH901
Thermistor