Temperature Sensors - Sanyo PLC-WM4500L Service Manual

Circuit Protections

Temperature sensors

The projector provides 2 temperature sensor ICs and 1 thermistor on the intake duct. These devices are monitoring
the surrounding temperature of the lamp, panel and intake duct are monitoring airflow passed through the air filter in
the intake duct.
- Internal temperature sensor A (IC1692) (around the Intake duct)
- Internal temperature sensor B (IC1816) (around the lamp house)
- Internal temperature sensor C (IC1814) (around the panel/prism)
IC1814 on the
Sensor C Board
the projector is shut down and the WArNING teMP. indicator
is blinking red.
When the temperature inside the projector reaches a certain level,
the WARNING TEMP. indicator starts blinking. If the temperature
rises moreover, the projector will be automatically shut down to pro-
tect the inside of the projector, and the WARNING TEMP indicator
is blinking fast and the POWER indicator is off. When the projector
has cooled down enough (to its normal operating temperature), the
POWER indicator lights on and it can be turned on again by press-
ing 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 projec-
tor is turned on again, the WARNING TEMP. indicator stops blinking.
then check the matters below:
– Did you provide appropriate space for the projector to be ventilated?
Check the installing condition to see if the air vents of the projector
are not blocked.
– Has the projector been installed near an Air-Conditioning/ Heating
Duct or Vent? Move the installation of the projector away from the
duct or vent.
– Is the filter clean? Replace the filter with a new one.
IC1816 on the Main
Board (behind)
POWER indicator
WARNING TEMP.
-7-
IC1692 on the
Sensor A Board
Led indicators
indicator