Epson EMP-S4, Руководство по обслуживанию

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2-16
EMP-S4
SEIKO EPSON Revision:B
2.8 Temperature Control
2.8.1 Sensors and Switches
This projector is equipped with the devices shown in the table below in order to protect the
safety of the operator and maintain general safety with regard to the projector itself by
preventing abnormalities in operation.
Lamp Lid Detection Switch
This switch is located on the Inner Exhaust Duct and connected to the lamp lid latch on the
inside base of the projector, and prevents current from going to the lamp if the lamp lid is open.
This lid is opened only when the operator is replacing the Lamp Assy. The switch is provided
in order to prevent the danger of burns that could occur if the lamp turned on accidentally.
The lamp lid detection switch is connected to CN900 on the MA board. When the lamp lid
opens, IC501 (IFCPU) detects the lamp lid open signal and sends the Lamp OFF signal to turn
off the lamp.
Figure 2-19. Lamp Lid Detection Switch
Table 2-3.
Sensor/Switch Location Function
Lamp lid detection switch On the Exhaust Duct Inner
Interrupts AC power when the
lamp lid is opened. Power cannot
be turned on until the lid is closed.
TH board On the Exhaust Duct Inner
Prevents overheating around the
Lamp Assy. Turns the lamp off
when a temperature rises above a
certain level.
Safety Switch
On the side of the Exhaust
Duct Inner
Prevents overheating around the
Lamp Assy. Interrupts the AC
power when a temperature rises
above a certain level.
Lamp Lid Detection Switch