Epson EMP-1815 Manuel de service télécharger pdf (Page 22)

2-7

CONFIDENTIAL

EMP-1825/EMP-1815/EMP-1810

SEIKO EPSON Revision:C

2.3 Temperature Control

The internal temperature of this projector is monitored by the sensors (the Lamp thermistor, L/

V thermistor) in order to protect the projector from internal overheat, which may cause unsafe

state or damage to the projector. The fans’ revolutions are controled according to the detected

temperature data. The fans’ revolutions are altered by changing the driving voltage based on

the detected data. In this way, the ventilation level is optimaized and the internal temperature is

kept stablized.

2.3.1 Sensors and Switches

The fans and sensors mounted in this product, and the routes of air flow are shown below.

Figure 2-5.

Part Name Function

Intake Fan A/B

Take in fresh air from the intake duct (with Air Filter) located in the bottom of

the projector, and supply it to the Light Valves R/G/B.

P/S Fan Ventilates the circuit boards of the PS Ballast Assy.

Lamp Fan Ventilates the inside of the Lamp Unit.

PBS Fan Ventilates the PBS (Polarizer) of the Optical Engine.

EX Fan Exhausts the heated air generated inside the projector to the outside.

PBS Fan

EX Fan

TH Board

Lamp Fan

P/S Fan

Intake Fans

Thermistor

Lamp (Heat source)

PS Ballast

(Heat source)

POP (Susceptible to heat)

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Epson EMP-1815 Manuel de service Page 22