Temperature Sensors, Wind Sensors - Eiki EIP-HDT30 Service Manual

Circuit Protections

Temperature sensors, wind sensors

The projector provides 3 temperature sensor ICs, 2 sensors on the Main board and 1 sensor on the Sensor board, 1
thermistor on the peltier device and 1 wind sensor on the intake duct. The sensor ICs monitor surrounding tempera-
ture of the optical parts, and surrounding temperature of the intake duct, and the wind sensor monitors airflow passed
through the air filter in the intake duct.
- Temperature sensor (IC8821) is on the main board for monitoring the surrounding temperature of DMD module.
- Temperature sensor (IC1381) is on the main board for monitoring the surrounding temperature of optical unit.
- Temperature sensor (IC8811) is on the sensor board for monitoring the surrounding temperature of the intake
duct.
- Thermistor sensor (TH901) is on the peltier device for monitoring the temperature.
- Wind sensor (S901) on the filter box.
The projector is shut down and the WARNING TEMP . indicator is
blinking red.
When the temperature inside the projector reaches a certain level, the projec-
tor will be automatically shut down to protect the inside of the projector. The
LAMP indicator turns red brighter and the WARNING TEMP indicator blinks
while the projector is being cooled down. When the projector has cooled
down enough (to its normal operating temperature), 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. indicator stops blinking.
IC8821
(Behind)
IC1381
IC8811
S901
Wind sensor
TH901
Thermistor
-7-
Indicators
POWER
LAMP
WARNING TEMP.
WARNING FILTER
SHUTTER
LAMP 1 REPLACE
LAMP 2 REPLACE
WARNING TEMP .
blinking red