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Circuit Protections
■ To control the driving power of the cooling fans.
This projector detects internal temperature and automatically controls operating power of cooling fans.
The CPU checks the temperature and atmospheric pressure inside a projector. It checks a temperature using tempera-
ture sensor-IC5801 and it checks an atmospheric pressure using pressure sensor-IC886.
The CPU controls the driving power of the cooling fans so the temperature inside the projector is maintained to normal
temperature.
■ To shut down the projector.
The CPU checks temperature of Blue polarized glass (Z8P & TH) and inhalation air (IC5801). If each part temperature
reaches to abnormal temperature, the CPU will turn off a projector, and will blink WARNING TEMP. indicator at intervals
of 0.5 seconds. Cooling fans operate until temperature returns to normal. WARNING TEMP. indicator will stop blink, if
temperature returns to normal.
● Temperature Monitor System
Main Board
A-side
Front side
B-side
Temp. Sensor
IC2541
Temp. Sensor
(Inhalation air)
IC5801
Pressure Sensor
IC886
Temp. Sensor
(Blue polarized glass)
Z8P & TH
Temperature sensors location
Blue polarizer unit
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